/**
 * MigrationTest - Unit tests for Migration system
 */
using Implexus.Core;
using Implexus.Engine;
using Implexus.Storage;
using Implexus.Migrations;

/**
 * Abstract base class for async test operations (replaces async delegates).
 */
public abstract class AsyncTestOperation : Object {
    public abstract async void execute_async() throws Error;
}

/**
 * Helper for running async tests synchronously.
 */
void run_async_test(AsyncTestOperation op) {
    var loop = new MainLoop();
    Error? error = null;
    
    op.execute_async.begin((obj, res) => {
        try {
            op.execute_async.end(res);
        } catch (Error e) {
            error = e;
        }
        loop.quit();
    });
    loop.run();
    
    if (error != null) {
        warning("Async test error: %s", ((!)error).message);
    }
}

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

    // === MigrationStorage Tests ===
    
    // Test 1: Record migration
    if (test_record_migration()) {
        passed++;
        stdout.puts("PASS: test_record_migration\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_record_migration\n");
    }

    // Test 2: Get applied versions
    if (test_get_applied_versions()) {
        passed++;
        stdout.puts("PASS: test_get_applied_versions\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_get_applied_versions\n");
    }

    // Test 3: Is applied
    if (test_is_applied()) {
        passed++;
        stdout.puts("PASS: test_is_applied\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_is_applied\n");
    }

    // Test 4: Remove migration
    if (test_remove_migration()) {
        passed++;
        stdout.puts("PASS: test_remove_migration\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_remove_migration\n");
    }

    // Test 5: Get migration record
    if (test_get_migration_record()) {
        passed++;
        stdout.puts("PASS: test_get_migration_record\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_get_migration_record\n");
    }

    // === MigrationRunner Tests ===

    // Test 6: Register migration
    if (test_register_migration()) {
        passed++;
        stdout.puts("PASS: test_register_migration\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_register_migration\n");
    }

    // Test 7: Get pending versions
    if (test_get_pending_versions()) {
        passed++;
        stdout.puts("PASS: test_get_pending_versions\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_get_pending_versions\n");
    }

    // Test 8: Run pending migrations
    run_async_test(new TestRunPendingOperation(ref passed, ref failed));

    // Test 9: Run to version
    run_async_test(new TestRunToVersionOperation(ref passed, ref failed));

    // Test 10: Rollback to version
    run_async_test(new TestRollbackToVersionOperation(ref passed, ref failed));

    // Test 11: Migration order
    run_async_test(new TestMigrationOrderOperation(ref passed, ref failed));

    // Test 12: Error already applied
    run_async_test(new TestErrorAlreadyAppliedOperation(ref passed, ref failed));

    // Test 13: Error missing migration
    run_async_test(new TestErrorMissingMigrationOperation(ref passed, ref failed));

    // Test 14: Version conflict
    if (test_version_conflict()) {
        passed++;
        stdout.puts("PASS: test_version_conflict\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_version_conflict\n");
    }

    // === BootstrapMigration Tests ===

    // Test 15: Bootstrap version
    if (test_bootstrap_version()) {
        passed++;
        stdout.puts("PASS: test_bootstrap_version\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_bootstrap_version\n");
    }

    // Test 16: Bootstrap irreversible
    run_async_test(new TestBootstrapIrreversibleOperation(ref passed, ref failed));

    // Test 17: Bootstrap execution
    run_async_test(new TestBootstrapExecutionOperation(ref passed, ref failed));

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

// === Helper Classes ===

/**
 * Simple test migration that creates a container.
 */
public class TestMigration : Object, Migration {
    public string _version;
    public string _description;
    public string _container_name;
    public bool up_called { get; private set; default = false; }
    public bool down_called { get; private set; default = false; }
    
    public TestMigration(string version, string description, string container_name) {
        _version = version;
        _description = description;
        _container_name = container_name;
    }
    
    public string version { owned get { return _version; } }
    public string description { owned get { return _description; } }
    
    public async void up_async(Engine engine) throws MigrationError {
        up_called = true;
        try {
            var root = yield engine.get_root_async();
            yield root.create_container_async(_container_name);
        } catch (EngineError e) {
            throw new MigrationError.EXECUTION_FAILED(
                "Failed to create container: %s".printf(e.message)
            );
        }
    }
    
    public async void down_async(Engine engine) throws MigrationError {
        down_called = true;
        try {
            var root = yield engine.get_root_async();
            var child = yield root.get_child_async(_container_name);
            if (child != null) {
                yield ((!) child).delete_async();
            }
        } catch (EngineError e) {
            throw new MigrationError.EXECUTION_FAILED(
                "Failed to delete container: %s".printf(e.message)
            );
        }
    }
}

/**
 * Migration that throws an error on up_async().
 */
public class FailingMigration : Object, Migration {
    public string _version;
    public string _description;
    
    public FailingMigration(string version) {
        _version = version;
        _description = "Failing migration";
    }
    
    public string version { owned get { return _version; } }
    public string description { owned get { return _description; } }
    
    public async void up_async(Engine engine) throws MigrationError {
        throw new MigrationError.EXECUTION_FAILED("Intentional failure");
    }
    
    public async void down_async(Engine engine) throws MigrationError {
        // Does nothing
    }
}

// === Async Test Operation Classes ===

public class TestRunPendingOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestRunPendingOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_run_pending();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_run_pending\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_run_pending\n");
        }
    }
}

public class TestRunToVersionOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestRunToVersionOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_run_to_version();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_run_to_version\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_run_to_version\n");
        }
    }
}

public class TestRollbackToVersionOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestRollbackToVersionOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_rollback_to_version();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_rollback_to_version\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_rollback_to_version\n");
        }
    }
}

public class TestMigrationOrderOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestMigrationOrderOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_migration_order();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_migration_order\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_migration_order\n");
        }
    }
}

public class TestErrorAlreadyAppliedOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestErrorAlreadyAppliedOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_error_already_applied();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_error_already_applied\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_error_already_applied\n");
        }
    }
}

public class TestErrorMissingMigrationOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestErrorMissingMigrationOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_error_missing_migration();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_error_missing_migration\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_error_missing_migration\n");
        }
    }
}

public class TestBootstrapIrreversibleOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestBootstrapIrreversibleOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_bootstrap_irreversible();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_bootstrap_irreversible\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_bootstrap_irreversible\n");
        }
    }
}

public class TestBootstrapExecutionOperation : AsyncTestOperation {
    private unowned int _passed;
    private unowned int _failed;
    
    public TestBootstrapExecutionOperation(ref int passed, ref int failed) {
        _passed = passed;
        _failed = failed;
    }
    
    public override async void execute_async() throws Error {
        bool result = yield test_bootstrap_execution();
        if (result) {
            _passed++;
            stdout.puts("PASS: test_bootstrap_execution\n");
        } else {
            _failed++;
            stdout.puts("FAIL: test_bootstrap_execution\n");
        }
    }
}

// === Helper Functions ===

/**
 * Creates a temporary directory for testing.
 */
string create_temp_dir() {
    string temp_dir = DirUtils.mkdtemp("implexus_migration_test_XXXXXX");
    return temp_dir;
}

/**
 * Cleans up a temporary directory.
 */
void cleanup_dir(string path) {
    try {
        Dir dir = Dir.open(path, 0);
        string? name;
        while ((name = dir.read_name()) != null) {
            FileUtils.unlink(Path.build_filename(path, name));
        }
    } catch (FileError e) {
        // Ignore errors
    }
    DirUtils.remove(path);
}

// === MigrationStorage Tests ===

// Test 1: Record migration stores migration records correctly
bool test_record_migration() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var storage = new MigrationStorage(engine);
        
        // Record a migration
        storage.record_migration("2026031301", "Create users table");
        
        // Verify it was recorded
        if (!storage.is_applied("2026031301")) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test 2: Get applied versions returns all recorded versions
bool test_get_applied_versions() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var storage = new MigrationStorage(engine);
        
        // Record migrations in non-sorted order
        storage.record_migration("2026031303", "Third migration");
        storage.record_migration("2026031301", "First migration");
        storage.record_migration("2026031302", "Second migration");
        
        // Get applied versions and convert to vector for checking
        var versions = storage.get_applied_versions();
        var version_set = new Invercargill.DataStructures.HashSet<string>();
        foreach (var v in versions) {
            version_set.add(v);
        }
        
        // Should have 3 versions
        if (version_set.length != 3) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Verify all three versions are present
        if (!version_set.has("2026031301")) {
            cleanup_dir(temp_dir);
            return false;
        }
        if (!version_set.has("2026031302")) {
            cleanup_dir(temp_dir);
            return false;
        }
        if (!version_set.has("2026031303")) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (MigrationError e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test 3: Is applied correctly identifies applied migrations
bool test_is_applied() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var storage = new MigrationStorage(engine);
        
        // Check before recording
        if (storage.is_applied("2026031301")) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Record migration
        storage.record_migration("2026031301", "Test migration");
        
        // Check after recording
        if (!storage.is_applied("2026031301")) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Check non-existent migration
        if (storage.is_applied("9999999999")) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test 4: Remove migration removes records correctly
bool test_remove_migration() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var storage = new MigrationStorage(engine);
        
        // Record migration
        storage.record_migration("2026031301", "Test migration");
        
        // Verify it was recorded
        if (!storage.is_applied("2026031301")) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Remove migration
        storage.remove_migration("2026031301");
        
        // Verify it was removed
        if (storage.is_applied("2026031301")) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test 5: Get migration record returns correct metadata
bool test_get_migration_record() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var storage = new MigrationStorage(engine);
        
        // Record migration
        storage.record_migration("2026031301", "Create users table");
        
        // Get the record
        var record = storage.get_migration_record("2026031301");
        
        if (record == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!) record).version != "2026031301") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!) record).description != "Create users table") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        if (((!) record).applied_at == null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Check non-existent migration
        var missing = storage.get_migration_record("9999999999");
        if (missing != null) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// === MigrationRunner Tests ===

// Test 6: Register migration stores migrations
bool test_register_migration() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var runner = new MigrationRunner(engine);
        
        var migration = new TestMigration("2026031301", "Test migration", "test_container");
        
        runner.register_migration(migration);
        
        // Verify pending count is 1
        if (runner.get_pending_count() != 1) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test 7: Get pending versions identifies unapplied migrations
bool test_get_pending_versions() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var runner = new MigrationRunner(engine);
        
        // Register migrations
        runner.register_migration(new TestMigration("2026031301", "First", "container1"));
        runner.register_migration(new TestMigration("2026031302", "Second", "container2"));
        runner.register_migration(new TestMigration("2026031303", "Third", "container3"));
        
        // Apply one migration manually
        var storage = new MigrationStorage(engine);
        storage.record_migration("2026031302", "Second");
        
        // Get pending versions
        var pending = runner.get_pending_versions();
        
        // Convert to vector
        var pending_list = new Invercargill.DataStructures.Vector<string>();
        foreach (var v in pending) {
            pending_list.add(v);
        }
        
        // Should have 2 pending (2026031301 and 2026031303)
        if (pending_list.length != 2) {
            cleanup_dir(temp_dir);
            return false;
        }
        
        // Should be sorted
        if (pending_list[0] != "2026031301") {
            cleanup_dir(temp_dir);
            return false;
        }
        if (pending_list[1] != "2026031303") {
            cleanup_dir(temp_dir);
            return false;
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// Test 8: Run pending executes migrations in order
async bool test_run_pending() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var runner = new MigrationRunner(engine);
    
    // Register migrations
    var m1 = new TestMigration("2026031301", "First", "container1");
    var m2 = new TestMigration("2026031302", "Second", "container2");
    var m3 = new TestMigration("2026031303", "Third", "container3");
    
    runner.register_migration(m1);
    runner.register_migration(m2);
    runner.register_migration(m3);
    
    // Run pending
    int count = yield runner.run_pending_async();
    
    // Should have run 3 migrations
    if (count != 3) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify all were called
    if (!m1.up_called || !m2.up_called || !m3.up_called) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify all are applied
    if (!runner.is_applied("2026031301") ||
        !runner.is_applied("2026031302") ||
        !runner.is_applied("2026031303")) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify containers were created
    bool exists1 = yield engine.entity_exists_async(new EntityPath("/container1"));
    bool exists2 = yield engine.entity_exists_async(new EntityPath("/container2"));
    bool exists3 = yield engine.entity_exists_async(new EntityPath("/container3"));
    if (!exists1 || !exists2 || !exists3) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    cleanup_dir(temp_dir);
    return true;
}

// Test 9: Run to version runs migrations up to specific version
async bool test_run_to_version() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var runner = new MigrationRunner(engine);
    
    // Register migrations
    var m1 = new TestMigration("2026031301", "First", "container1");
    var m2 = new TestMigration("2026031302", "Second", "container2");
    var m3 = new TestMigration("2026031303", "Third", "container3");
    
    runner.register_migration(m1);
    runner.register_migration(m2);
    runner.register_migration(m3);
    
    // Run to version (inclusive)
    int count = yield runner.run_to_version_async("2026031302");
    
    // Should have run 2 migrations
    if (count != 2) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify first two were called
    if (!m1.up_called || !m2.up_called) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Third should NOT be called
    if (m3.up_called) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify only first two are applied
    if (!runner.is_applied("2026031301") || !runner.is_applied("2026031302")) {
        cleanup_dir(temp_dir);
        return false;
    }
    if (runner.is_applied("2026031303")) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    cleanup_dir(temp_dir);
    return true;
}

// Test 10: Rollback to version rolls back migrations correctly
async bool test_rollback_to_version() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var runner = new MigrationRunner(engine);
    
    // Register migrations
    var m1 = new TestMigration("2026031301", "First", "container1");
    var m2 = new TestMigration("2026031302", "Second", "container2");
    var m3 = new TestMigration("2026031303", "Third", "container3");
    
    runner.register_migration(m1);
    runner.register_migration(m2);
    runner.register_migration(m3);
    
    // Run all
    yield runner.run_pending_async();
    
    // Rollback to version 2026031301 (keeps 2026031301, removes 2026031302 and 2026031303)
    int count = yield runner.rollback_to_version_async("2026031301");
    
    // Should have rolled back 2 migrations
    if (count != 2) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify down was called on m2 and m3
    if (!m2.down_called || !m3.down_called) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // m1 down should NOT be called
    if (m1.down_called) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify only first is still applied
    if (!runner.is_applied("2026031301")) {
        cleanup_dir(temp_dir);
        return false;
    }
    if (runner.is_applied("2026031302") || runner.is_applied("2026031303")) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify containers 2 and 3 were deleted
    bool exists1 = yield engine.entity_exists_async(new EntityPath("/container1"));
    bool exists2 = yield engine.entity_exists_async(new EntityPath("/container2"));
    bool exists3 = yield engine.entity_exists_async(new EntityPath("/container3"));
    if (!exists1) {
        cleanup_dir(temp_dir);
        return false;
    }
    if (exists2 || exists3) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    cleanup_dir(temp_dir);
    return true;
}

// Test 11: Migrations run in correct order by version string
async bool test_migration_order() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var runner = new MigrationRunner(engine);
    
    // Register migrations in non-sorted order
    var m3 = new TestMigration("2026031303", "Third", "container3");
    var m1 = new TestMigration("2026031301", "First", "container1");
    var m2 = new TestMigration("2026031302", "Second", "container2");
    
    runner.register_migration(m3);
    runner.register_migration(m1);
    runner.register_migration(m2);
    
    // Run pending - should execute in version order
    int count = yield runner.run_pending_async();
    
    if (count != 3) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify all were called
    if (!m1.up_called || !m2.up_called || !m3.up_called) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify all are applied in order
    var versions = runner.get_applied_versions();
    var version_list = new Invercargill.DataStructures.Vector<string>();
    foreach (var v in versions) {
        version_list.add(v);
    }
    
    if (version_list.length != 3) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    if (version_list[0] != "2026031301" ||
        version_list[1] != "2026031302" ||
        version_list[2] != "2026031303") {
        cleanup_dir(temp_dir);
        return false;
    }
    
    cleanup_dir(temp_dir);
    return true;
}

// Test 12: Error handling for already applied migrations
async bool test_error_already_applied() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var runner = new MigrationRunner(engine);
    
    // Register and apply migration
    var m1 = new TestMigration("2026031301", "First", "container1");
    runner.register_migration(m1);
    yield runner.run_pending_async();
    
    // Try to run the same migration again via run_one_async
    try {
        yield runner.run_one_async("2026031301");
        // Should have thrown
        cleanup_dir(temp_dir);
        return false;
    } catch (MigrationError.ALREADY_APPLIED e) {
        // Expected
    }
    
    cleanup_dir(temp_dir);
    return true;
}

// Test 13: Error handling for missing migrations
async bool test_error_missing_migration() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var runner = new MigrationRunner(engine);
    
    // Verify the migration doesn't exist in pending list
    var pending = runner.get_pending_versions();
    bool found = false;
    foreach (var v in pending) {
        if (v == "9999999999") {
            found = true;
            break;
        }
    }
    
    // The migration should NOT be in the pending list
    // because it was never registered
    if (found) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify is_applied returns false for non-existent migration
    if (runner.is_applied("9999999999")) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    cleanup_dir(temp_dir);
    return true;
}

// Test 14: Version conflict when registering duplicate
bool test_version_conflict() {
    string temp_dir = create_temp_dir();
    
    try {
        var engine = new EmbeddedEngine.with_path(temp_dir);
        var runner = new MigrationRunner(engine);
        
        // Register first migration
        var m1 = new TestMigration("2026031301", "First", "container1");
        runner.register_migration(m1);
        
        // Try to register duplicate version
        var m2 = new TestMigration("2026031301", "Duplicate", "container2");
        try {
            runner.register_migration(m2);
            // Should have thrown
            cleanup_dir(temp_dir);
            return false;
        } catch (MigrationError.VERSION_CONFLICT e) {
            // Expected
        }
        
        cleanup_dir(temp_dir);
        return true;
    } catch (Error e) {
        cleanup_dir(temp_dir);
        return false;
    }
}

// === BootstrapMigration Tests ===

// Test 15: Bootstrap version is "0000000000"
bool test_bootstrap_version() {
    var bootstrap = new BootstrapMigration();
    
    if (bootstrap.version != "0000000000") {
        return false;
    }
    
    return true;
}

// Test 16: Bootstrap down throws IRREVERSIBLE error
async bool test_bootstrap_irreversible() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var bootstrap = new BootstrapMigration();
    
    try {
        yield bootstrap.down_async(engine);
        // Should have thrown
        cleanup_dir(temp_dir);
        return false;
    } catch (MigrationError.IRREVERSIBLE e) {
        // Expected
    }
    
    cleanup_dir(temp_dir);
    return true;
}

// Test 17: Bootstrap execution works correctly
async bool test_bootstrap_execution() throws Error {
    string temp_dir = create_temp_dir();
    
    var engine = new EmbeddedEngine.with_path(temp_dir);
    var runner = new MigrationRunner(engine);
    
    // Register bootstrap
    var bootstrap = new BootstrapMigration();
    runner.register_migration(bootstrap);
    
    // Run pending
    int count = yield runner.run_pending_async();
    
    // Should have run 1 migration
    if (count != 1) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify bootstrap is applied
    if (!runner.is_applied("0000000000")) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    // Verify root exists (bootstrap ensures this)
    var root = yield engine.get_root_async();
    if (root == null) {
        cleanup_dir(temp_dir);
        return false;
    }
    
    cleanup_dir(temp_dir);
    return true;
}