/**
 * DbmPersistenceTest - Comprehensive persistence tests for all DBM backends
 * 
 * These tests verify that data persists correctly across engine instances
 * for each supported DBM backend (Filesystem, GDBM, LMDB).
 * 
 * Test pattern:
 * 1. Create an engine with the specific backend
 * 2. Write data (containers, documents, properties)
 * 3. Shutdown and destroy the engine
 * 4. Create a new engine with the same path
 * 5. Verify all data persists correctly
 */
using Implexus.Core;
using Implexus.Engine;
using Implexus.Storage;

public static int main(string[] args) {
    int passed = 0;
    int failed = 0;

    // Filesystem Dbm Persistence Tests
    stdout.puts("\n=== Filesystem Dbm Persistence Tests ===\n");
    
    if (test_filesystem_basic_persistence()) {
        passed++;
        stdout.puts("PASS: test_filesystem_basic_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_filesystem_basic_persistence\n");
    }

    if (test_filesystem_container_persistence()) {
        passed++;
        stdout.puts("PASS: test_filesystem_container_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_filesystem_container_persistence\n");
    }

    if (test_filesystem_document_persistence()) {
        passed++;
        stdout.puts("PASS: test_filesystem_document_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_filesystem_document_persistence\n");
    }

    if (test_filesystem_property_persistence()) {
        passed++;
        stdout.puts("PASS: test_filesystem_property_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_filesystem_property_persistence\n");
    }

    if (test_filesystem_nested_structure_persistence()) {
        passed++;
        stdout.puts("PASS: test_filesystem_nested_structure_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_filesystem_nested_structure_persistence\n");
    }

    if (test_filesystem_multiple_properties_persistence()) {
        passed++;
        stdout.puts("PASS: test_filesystem_multiple_properties_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_filesystem_multiple_properties_persistence\n");
    }

    // GDBM Persistence Tests
    stdout.puts("\n=== GDBM Dbm Persistence Tests ===\n");
    
    if (test_gdbm_basic_persistence()) {
        passed++;
        stdout.puts("PASS: test_gdbm_basic_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_gdbm_basic_persistence\n");
    }

    if (test_gdbm_container_persistence()) {
        passed++;
        stdout.puts("PASS: test_gdbm_container_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_gdbm_container_persistence\n");
    }

    if (test_gdbm_document_persistence()) {
        passed++;
        stdout.puts("PASS: test_gdbm_document_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_gdbm_document_persistence\n");
    }

    if (test_gdbm_property_persistence()) {
        passed++;
        stdout.puts("PASS: test_gdbm_property_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_gdbm_property_persistence\n");
    }

    if (test_gdbm_nested_structure_persistence()) {
        passed++;
        stdout.puts("PASS: test_gdbm_nested_structure_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_gdbm_nested_structure_persistence\n");
    }

    if (test_gdbm_multiple_properties_persistence()) {
        passed++;
        stdout.puts("PASS: test_gdbm_multiple_properties_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_gdbm_multiple_properties_persistence\n");
    }

    // LMDB Persistence Tests
    stdout.puts("\n=== LMDB Dbm Persistence Tests ===\n");
    
    if (test_lmdb_basic_persistence()) {
        passed++;
        stdout.puts("PASS: test_lmdb_basic_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_lmdb_basic_persistence\n");
    }

    if (test_lmdb_container_persistence()) {
        passed++;
        stdout.puts("PASS: test_lmdb_container_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_lmdb_container_persistence\n");
    }

    if (test_lmdb_document_persistence()) {
        passed++;
        stdout.puts("PASS: test_lmdb_document_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_lmdb_document_persistence\n");
    }

    if (test_lmdb_property_persistence()) {
        passed++;
        stdout.puts("PASS: test_lmdb_property_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_lmdb_property_persistence\n");
    }

    if (test_lmdb_nested_structure_persistence()) {
        passed++;
        stdout.puts("PASS: test_lmdb_nested_structure_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_lmdb_nested_structure_persistence\n");
    }

    if (test_lmdb_multiple_properties_persistence()) {
        passed++;
        stdout.puts("PASS: test_lmdb_multiple_properties_persistence\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_lmdb_multiple_properties_persistence\n");
    }

    stdout.printf("\n=== Results: %d passed, %d failed ===\n", passed, failed);
    return failed > 0 ? 1 : 0;
}

// ============================================================================
// Helper Functions
// ============================================================================

// Helper to create temporary directory
string create_temp_dir(string prefix = "implexus_persistence_test_") {
    return DirUtils.mkdtemp(prefix + "XXXXXX");
}

// Helper to run async operation synchronously
delegate void AsyncOperation(MainLoop loop, ref Error? error);

void run_async(AsyncOperation op) {
    var loop = new MainLoop();
    Error? error = null;
    op(loop, ref error);
    loop.run();
    if (error != null) {
        warning("Async operation error: %s", ((!)error).message);
    }
}

// Cleanup helper for directory
void cleanup_dir(string path) {
    try {
        Dir dir = Dir.open(path, 0);
        string? name;
        while ((name = dir.read_name()) != null) {
            string file_path = Path.build_filename(path, name);
            if (FileUtils.test(file_path, FileTest.IS_DIR)) {
                cleanup_dir(file_path);
            } else {
                FileUtils.unlink(file_path);
            }
        }
    } catch (FileError e) {
        // Ignore errors
    }
    DirUtils.remove(path);
}

// ============================================================================
// Filesystem Dbm Persistence Tests
// ============================================================================

// Test: Basic root persistence
bool test_filesystem_basic_persistence() {
    string temp_dir = create_temp_dir();
    
    try {
        // Phase 1: Create engine and get root
        var dbm1 = new FilesystemDbm(temp_dir);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Shutdown engine
        engine1.shutdown();
        
        // Phase 2: Create new engine and verify root exists
        var dbm2 = new FilesystemDbm(temp_dir);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? root2 = null;
        bool exists = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/"), (obj, res) => {
            try {
                exists = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.get_root_async.begin((obj, res) => {
            try {
                root2 = engine2.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Container persistence
bool test_filesystem_container_persistence() {
    string temp_dir = create_temp_dir();
    
    try {
        // Phase 1: Create container
        var dbm1 = new FilesystemDbm(temp_dir);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("test_container", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        
        // Phase 2: Verify container persists
        var dbm2 = new FilesystemDbm(temp_dir);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        bool exists = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/test_container"), (obj, res) => {
            try {
                exists = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        Entity? container2 = null;
        engine2.get_entity_async.begin(new EntityPath("/test_container"), (obj, res) => {
            try {
                container2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)container2).entity_type != EntityType.CONTAINER) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)container2).name != "test_container") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Document persistence
bool test_filesystem_document_persistence() {
    string temp_dir = create_temp_dir();
    
    try {
        // Phase 1: Create document
        var dbm1 = new FilesystemDbm(temp_dir);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("docs", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)container1).create_document_async.begin("mydoc", "TestType", (obj, res) => {
            try {
                doc1 = ((!)container1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        
        // Phase 2: Verify document persists
        var dbm2 = new FilesystemDbm(temp_dir);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        
        engine2.get_entity_async.begin(new EntityPath("/docs/mydoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).entity_type != EntityType.DOCUMENT) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).name != "mydoc") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).type_label != "TestType") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Property persistence
bool test_filesystem_property_persistence() {
    string temp_dir = create_temp_dir();
    
    try {
        // Phase 1: Create document with property
        var dbm1 = new FilesystemDbm(temp_dir);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("docs", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)container1).create_document_async.begin("mydoc", "TestType", (obj, res) => {
            try {
                doc1 = ((!)container1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Set property
        ((!)doc1).set_entity_property_async.begin("email", new Invercargill.NativeElement<string>("test@example.com"), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        
        // Phase 2: Verify property persists
        var dbm2 = new FilesystemDbm(temp_dir);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        Invercargill.Element? email = null;
        
        engine2.get_entity_async.begin(new EntityPath("/docs/mydoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("email", (obj, res) => {
            try {
                email = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || email == null || ((!)email).is_null()) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        string email_val = ((!)email).as<string>();
        if (email_val != "test@example.com") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Nested structure persistence
bool test_filesystem_nested_structure_persistence() {
    string temp_dir = create_temp_dir();
    
    try {
        // Phase 1: Create nested structure
        var dbm1 = new FilesystemDbm(temp_dir);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? level1 = null;
        Entity? level2 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("level1", (obj, res) => {
            try {
                level1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || level1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)level1).create_container_async.begin("level2", (obj, res) => {
            try {
                level2 = ((!)level1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || level2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)level2).create_document_async.begin("deepdoc", "DeepType", (obj, res) => {
            try {
                doc1 = ((!)level2).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        
        // Phase 2: Verify nested structure persists
        var dbm2 = new FilesystemDbm(temp_dir);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        bool exists1 = false;
        bool exists2 = false;
        bool exists3 = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/level1"), (obj, res) => {
            try {
                exists1 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists1) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.entity_exists_async.begin(new EntityPath("/level1/level2"), (obj, res) => {
            try {
                exists2 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists2) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.entity_exists_async.begin(new EntityPath("/level1/level2/deepdoc"), (obj, res) => {
            try {
                exists3 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists3) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        Entity? doc2 = null;
        engine2.get_entity_async.begin(new EntityPath("/level1/level2/deepdoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).type_label != "DeepType") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Multiple properties persistence
bool test_filesystem_multiple_properties_persistence() {
    string temp_dir = create_temp_dir();
    
    try {
        // Phase 1: Create document with multiple properties
        var dbm1 = new FilesystemDbm(temp_dir);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_document_async.begin("multidoc", "MultiType", (obj, res) => {
            try {
                doc1 = ((!)root1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Set multiple properties of different types
        ((!)doc1).set_entity_property_async.begin("name", new Invercargill.NativeElement<string>("Test Name"), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("count", new Invercargill.NativeElement<int64?>(42), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("active", new Invercargill.NativeElement<bool?>(true), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("score", new Invercargill.NativeElement<double?>(3.14159), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        
        // Phase 2: Verify all properties persist
        var dbm2 = new FilesystemDbm(temp_dir);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        Invercargill.Element? name = null;
        Invercargill.Element? count = null;
        Invercargill.Element? active = null;
        Invercargill.Element? score = null;
        
        engine2.get_entity_async.begin(new EntityPath("/multidoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("name", (obj, res) => {
            try {
                name = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || name == null || ((!)name).as<string>() != "Test Name") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("count", (obj, res) => {
            try {
                count = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || count == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        int64? count_val = ((!)count).as<int64?>();
        if (count_val == null || (!)count_val != 42) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("active", (obj, res) => {
            try {
                active = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || active == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        bool? active_val = ((!)active).as<bool?>();
        if (active_val == null || (!)active_val != true) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("score", (obj, res) => {
            try {
                score = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || score == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        double? score_val = ((!)score).as<double?>();
        if (score_val == null || (!)score_val < 3.14158 || (!)score_val > 3.14160) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// ============================================================================
// GDBM Persistence Tests
// ============================================================================

// Test: Basic root persistence with GDBM
bool test_gdbm_basic_persistence() {
    string temp_dir = create_temp_dir("implexus_gdbm_persist_");
    string db_path = Path.build_filename(temp_dir, "test.db");
    
    try {
        // Phase 1: Create engine and get root
        var dbm1 = new GdbmDbm();
        dbm1.open(db_path, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Shutdown engine and close DB
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Create new engine and verify root exists
        var dbm2 = new GdbmDbm();
        dbm2.open(db_path, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? root2 = null;
        bool exists = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/"), (obj, res) => {
            try {
                exists = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.get_root_async.begin((obj, res) => {
            try {
                root2 = engine2.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Container persistence with GDBM
bool test_gdbm_container_persistence() {
    string temp_dir = create_temp_dir("implexus_gdbm_persist_");
    string db_path = Path.build_filename(temp_dir, "test.db");
    
    try {
        // Phase 1: Create container
        var dbm1 = new GdbmDbm();
        dbm1.open(db_path, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("test_container", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify container persists
        var dbm2 = new GdbmDbm();
        dbm2.open(db_path, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        bool exists = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/test_container"), (obj, res) => {
            try {
                exists = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        Entity? container2 = null;
        engine2.get_entity_async.begin(new EntityPath("/test_container"), (obj, res) => {
            try {
                container2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)container2).entity_type != EntityType.CONTAINER) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)container2).name != "test_container") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Document persistence with GDBM
bool test_gdbm_document_persistence() {
    string temp_dir = create_temp_dir("implexus_gdbm_persist_");
    string db_path = Path.build_filename(temp_dir, "test.db");
    
    try {
        // Phase 1: Create document
        var dbm1 = new GdbmDbm();
        dbm1.open(db_path, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("docs", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)container1).create_document_async.begin("mydoc", "TestType", (obj, res) => {
            try {
                doc1 = ((!)container1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify document persists
        var dbm2 = new GdbmDbm();
        dbm2.open(db_path, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        
        engine2.get_entity_async.begin(new EntityPath("/docs/mydoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).entity_type != EntityType.DOCUMENT) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).name != "mydoc") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).type_label != "TestType") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Property persistence with GDBM
bool test_gdbm_property_persistence() {
    string temp_dir = create_temp_dir("implexus_gdbm_persist_");
    string db_path = Path.build_filename(temp_dir, "test.db");
    
    try {
        // Phase 1: Create document with property
        var dbm1 = new GdbmDbm();
        dbm1.open(db_path, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("docs", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)container1).create_document_async.begin("mydoc", "TestType", (obj, res) => {
            try {
                doc1 = ((!)container1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Set property
        ((!)doc1).set_entity_property_async.begin("email", new Invercargill.NativeElement<string>("test@example.com"), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify property persists
        var dbm2 = new GdbmDbm();
        dbm2.open(db_path, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        Invercargill.Element? email = null;
        
        engine2.get_entity_async.begin(new EntityPath("/docs/mydoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("email", (obj, res) => {
            try {
                email = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || email == null || ((!)email).is_null()) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        string email_val = ((!)email).as<string>();
        if (email_val != "test@example.com") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Nested structure persistence with GDBM
bool test_gdbm_nested_structure_persistence() {
    string temp_dir = create_temp_dir("implexus_gdbm_persist_");
    string db_path = Path.build_filename(temp_dir, "test.db");
    
    try {
        // Phase 1: Create nested structure
        var dbm1 = new GdbmDbm();
        dbm1.open(db_path, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? level1 = null;
        Entity? level2 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("level1", (obj, res) => {
            try {
                level1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || level1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)level1).create_container_async.begin("level2", (obj, res) => {
            try {
                level2 = ((!)level1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || level2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)level2).create_document_async.begin("deepdoc", "DeepType", (obj, res) => {
            try {
                doc1 = ((!)level2).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify nested structure persists
        var dbm2 = new GdbmDbm();
        dbm2.open(db_path, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        bool exists1 = false;
        bool exists2 = false;
        bool exists3 = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/level1"), (obj, res) => {
            try {
                exists1 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists1) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.entity_exists_async.begin(new EntityPath("/level1/level2"), (obj, res) => {
            try {
                exists2 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists2) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.entity_exists_async.begin(new EntityPath("/level1/level2/deepdoc"), (obj, res) => {
            try {
                exists3 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists3) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        Entity? doc2 = null;
        engine2.get_entity_async.begin(new EntityPath("/level1/level2/deepdoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).type_label != "DeepType") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Multiple properties persistence with GDBM
bool test_gdbm_multiple_properties_persistence() {
    string temp_dir = create_temp_dir("implexus_gdbm_persist_");
    string db_path = Path.build_filename(temp_dir, "test.db");
    
    try {
        // Phase 1: Create document with multiple properties
        var dbm1 = new GdbmDbm();
        dbm1.open(db_path, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_document_async.begin("multidoc", "MultiType", (obj, res) => {
            try {
                doc1 = ((!)root1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Set multiple properties of different types
        ((!)doc1).set_entity_property_async.begin("name", new Invercargill.NativeElement<string>("Test Name"), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("count", new Invercargill.NativeElement<int64?>(42), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("active", new Invercargill.NativeElement<bool?>(true), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("score", new Invercargill.NativeElement<double?>(3.14159), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify all properties persist
        var dbm2 = new GdbmDbm();
        dbm2.open(db_path, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        Invercargill.Element? name = null;
        Invercargill.Element? count = null;
        Invercargill.Element? active = null;
        Invercargill.Element? score = null;
        
        engine2.get_entity_async.begin(new EntityPath("/multidoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("name", (obj, res) => {
            try {
                name = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || name == null || ((!)name).as<string>() != "Test Name") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("count", (obj, res) => {
            try {
                count = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || count == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        int64? count_val = ((!)count).as<int64?>();
        if (count_val == null || (!)count_val != 42) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("active", (obj, res) => {
            try {
                active = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || active == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        bool? active_val = ((!)active).as<bool?>();
        if (active_val == null || (!)active_val != true) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("score", (obj, res) => {
            try {
                score = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || score == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        double? score_val = ((!)score).as<double?>();
        if (score_val == null || (!)score_val < 3.14158 || (!)score_val > 3.14160) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// ============================================================================
// LMDB Persistence Tests
// ============================================================================

// Test: Basic root persistence with LMDB
bool test_lmdb_basic_persistence() {
    string temp_dir = create_temp_dir("implexus_lmdb_persist_");
    
    try {
        // Phase 1: Create engine and get root
        var dbm1 = new LmdbDbm();
        dbm1.open(temp_dir, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Shutdown engine and close DB
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Create new engine and verify root exists
        var dbm2 = new LmdbDbm();
        dbm2.open(temp_dir, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? root2 = null;
        bool exists = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/"), (obj, res) => {
            try {
                exists = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.get_root_async.begin((obj, res) => {
            try {
                root2 = engine2.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Container persistence with LMDB
bool test_lmdb_container_persistence() {
    string temp_dir = create_temp_dir("implexus_lmdb_persist_");
    
    try {
        // Phase 1: Create container
        var dbm1 = new LmdbDbm();
        dbm1.open(temp_dir, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("test_container", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify container persists
        var dbm2 = new LmdbDbm();
        dbm2.open(temp_dir, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        bool exists = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/test_container"), (obj, res) => {
            try {
                exists = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        Entity? container2 = null;
        engine2.get_entity_async.begin(new EntityPath("/test_container"), (obj, res) => {
            try {
                container2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)container2).entity_type != EntityType.CONTAINER) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)container2).name != "test_container") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Document persistence with LMDB
bool test_lmdb_document_persistence() {
    string temp_dir = create_temp_dir("implexus_lmdb_persist_");
    
    try {
        // Phase 1: Create document
        var dbm1 = new LmdbDbm();
        dbm1.open(temp_dir, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("docs", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)container1).create_document_async.begin("mydoc", "TestType", (obj, res) => {
            try {
                doc1 = ((!)container1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify document persists
        var dbm2 = new LmdbDbm();
        dbm2.open(temp_dir, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        
        engine2.get_entity_async.begin(new EntityPath("/docs/mydoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).entity_type != EntityType.DOCUMENT) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).name != "mydoc") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).type_label != "TestType") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Property persistence with LMDB
bool test_lmdb_property_persistence() {
    string temp_dir = create_temp_dir("implexus_lmdb_persist_");
    
    try {
        // Phase 1: Create document with property
        var dbm1 = new LmdbDbm();
        dbm1.open(temp_dir, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? container1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("docs", (obj, res) => {
            try {
                container1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || container1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)container1).create_document_async.begin("mydoc", "TestType", (obj, res) => {
            try {
                doc1 = ((!)container1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Set property
        ((!)doc1).set_entity_property_async.begin("email", new Invercargill.NativeElement<string>("test@example.com"), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify property persists
        var dbm2 = new LmdbDbm();
        dbm2.open(temp_dir, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        Invercargill.Element? email = null;
        
        engine2.get_entity_async.begin(new EntityPath("/docs/mydoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("email", (obj, res) => {
            try {
                email = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || email == null || ((!)email).is_null()) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        string email_val = ((!)email).as<string>();
        if (email_val != "test@example.com") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Nested structure persistence with LMDB
bool test_lmdb_nested_structure_persistence() {
    string temp_dir = create_temp_dir("implexus_lmdb_persist_");
    
    try {
        // Phase 1: Create nested structure
        var dbm1 = new LmdbDbm();
        dbm1.open(temp_dir, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? level1 = null;
        Entity? level2 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_container_async.begin("level1", (obj, res) => {
            try {
                level1 = ((!)root1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || level1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)level1).create_container_async.begin("level2", (obj, res) => {
            try {
                level2 = ((!)level1).create_container_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || level2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)level2).create_document_async.begin("deepdoc", "DeepType", (obj, res) => {
            try {
                doc1 = ((!)level2).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify nested structure persists
        var dbm2 = new LmdbDbm();
        dbm2.open(temp_dir, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        bool exists1 = false;
        bool exists2 = false;
        bool exists3 = false;
        
        engine2.entity_exists_async.begin(new EntityPath("/level1"), (obj, res) => {
            try {
                exists1 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists1) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.entity_exists_async.begin(new EntityPath("/level1/level2"), (obj, res) => {
            try {
                exists2 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists2) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.entity_exists_async.begin(new EntityPath("/level1/level2/deepdoc"), (obj, res) => {
            try {
                exists3 = engine2.entity_exists_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || !exists3) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        Entity? doc2 = null;
        engine2.get_entity_async.begin(new EntityPath("/level1/level2/deepdoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!)doc2).type_label != "DeepType") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test: Multiple properties persistence with LMDB
bool test_lmdb_multiple_properties_persistence() {
    string temp_dir = create_temp_dir("implexus_lmdb_persist_");
    
    try {
        // Phase 1: Create document with multiple properties
        var dbm1 = new LmdbDbm();
        dbm1.open(temp_dir, false);
        var storage1 = new BasicStorage(dbm1);
        var config1 = new StorageConfiguration(storage1);
        var engine1 = new EmbeddedEngine(config1);
        
        Entity? root1 = null;
        Entity? doc1 = null;
        Error? error = null;
        var loop = new MainLoop();
        
        engine1.get_root_async.begin((obj, res) => {
            try {
                root1 = engine1.get_root_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || root1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)root1).create_document_async.begin("multidoc", "MultiType", (obj, res) => {
            try {
                doc1 = ((!)root1).create_document_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc1 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Set multiple properties of different types
        ((!)doc1).set_entity_property_async.begin("name", new Invercargill.NativeElement<string>("Test Name"), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("count", new Invercargill.NativeElement<int64?>(42), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("active", new Invercargill.NativeElement<bool?>(true), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc1).set_entity_property_async.begin("score", new Invercargill.NativeElement<double?>(3.14159), (obj, res) => {
            try {
                ((!)doc1).set_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine1.shutdown();
        dbm1.close();
        
        // Phase 2: Verify all properties persist
        var dbm2 = new LmdbDbm();
        dbm2.open(temp_dir, false);
        var storage2 = new BasicStorage(dbm2);
        var config2 = new StorageConfiguration(storage2);
        var engine2 = new EmbeddedEngine(config2);
        
        Entity? doc2 = null;
        Invercargill.Element? name = null;
        Invercargill.Element? count = null;
        Invercargill.Element? active = null;
        Invercargill.Element? score = null;
        
        engine2.get_entity_async.begin(new EntityPath("/multidoc"), (obj, res) => {
            try {
                doc2 = engine2.get_entity_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || doc2 == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("name", (obj, res) => {
            try {
                name = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || name == null || ((!)name).as<string>() != "Test Name") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("count", (obj, res) => {
            try {
                count = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || count == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        int64? count_val = ((!)count).as<int64?>();
        if (count_val == null || (!)count_val != 42) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("active", (obj, res) => {
            try {
                active = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || active == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        bool? active_val = ((!)active).as<bool?>();
        if (active_val == null || (!)active_val != true) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        ((!)doc2).get_entity_property_async.begin("score", (obj, res) => {
            try {
                score = ((!)doc2).get_entity_property_async.end(res);
            } catch (Error e) {
                error = e;
            }
            loop.quit();
        });
        loop.run();
        
        if (error != null || score == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        double? score_val = ((!)score).as<double?>();
        if (score_val == null || (!)score_val < 3.14158 || (!)score_val > 3.14160) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        engine2.shutdown();
        dbm2.close();
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}