/**
 * SafePathTest - Unit tests for SafePath
 * 
 * Comprehensive tests for the SafePath factory class which creates
 * URL-encoded EntityPath instances.
 */
using Implexus.Core;

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

    // ========================================
    // 1. Basic Path Construction Tests
    // ========================================
    
    // Test: Single segment path
    if (test_basic_single_segment()) {
        passed++;
        stdout.puts("PASS: test_basic_single_segment\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_basic_single_segment\n");
    }

    // Test: Multi-segment path
    if (test_basic_multi_segment()) {
        passed++;
        stdout.puts("PASS: test_basic_multi_segment\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_basic_multi_segment\n");
    }

    // Test: Empty segments handling
    if (test_basic_empty_segments()) {
        passed++;
        stdout.puts("PASS: test_basic_empty_segments\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_basic_empty_segments\n");
    }

    // ========================================
    // 2. URL Encoding Tests
    // ========================================

    // Test: Spaces in segments
    if (test_encoding_spaces()) {
        passed++;
        stdout.puts("PASS: test_encoding_spaces\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_encoding_spaces\n");
    }

    // Test: Special characters (/, ?, #, =, &)
    if (test_encoding_special_chars()) {
        passed++;
        stdout.puts("PASS: test_encoding_special_chars\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_encoding_special_chars\n");
    }

    // Test: Unicode characters (Japanese, emoji)
    if (test_encoding_unicode()) {
        passed++;
        stdout.puts("PASS: test_encoding_unicode\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_encoding_unicode\n");
    }

    // Test: Reserved characters that should be encoded
    if (test_encoding_reserved_chars()) {
        passed++;
        stdout.puts("PASS: test_encoding_reserved_chars\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_encoding_reserved_chars\n");
    }

    // ========================================
    // 3. Variadic API Tests
    // ========================================

    // Test: Null as first argument (should return root path)
    if (test_variadic_null_first()) {
        passed++;
        stdout.puts("PASS: test_variadic_null_first\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_variadic_null_first\n");
    }

    // Test: Single segment + null
    if (test_variadic_single_segment()) {
        passed++;
        stdout.puts("PASS: test_variadic_single_segment\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_variadic_single_segment\n");
    }

    // Test: Multiple segments + null
    if (test_variadic_multiple_segments()) {
        passed++;
        stdout.puts("PASS: test_variadic_multiple_segments\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_variadic_multiple_segments\n");
    }

    // ========================================
    // 4. Array API Tests
    // ========================================

    // Test: Normal array of segments
    if (test_array_normal()) {
        passed++;
        stdout.puts("PASS: test_array_normal\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_array_normal\n");
    }

    // Test: Empty array (should return root path)
    if (test_array_empty()) {
        passed++;
        stdout.puts("PASS: test_array_empty\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_array_empty\n");
    }

    // Test: Array with special characters
    if (test_array_special_chars()) {
        passed++;
        stdout.puts("PASS: test_array_special_chars\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_array_special_chars\n");
    }

    // ========================================
    // 5. Decode Tests
    // ========================================

    // Test: Decoding %20 to space
    if (test_decode_space()) {
        passed++;
        stdout.puts("PASS: test_decode_space\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_decode_space\n");
    }

    // Test: Decoding %2F to /
    if (test_decode_slash()) {
        passed++;
        stdout.puts("PASS: test_decode_slash\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_decode_slash\n");
    }

    // Test: Decoding unicode percent-encoded strings
    if (test_decode_unicode()) {
        passed++;
        stdout.puts("PASS: test_decode_unicode\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_decode_unicode\n");
    }

    // Test: Invalid encoding error handling
    if (test_decode_invalid_encoding()) {
        passed++;
        stdout.puts("PASS: test_decode_invalid_encoding\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_decode_invalid_encoding\n");
    }

    // ========================================
    // 6. Integration Tests
    // ========================================

    // Test: Verify returned EntityPath works correctly
    if (test_integration_entity_path()) {
        passed++;
        stdout.puts("PASS: test_integration_entity_path\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_integration_entity_path\n");
    }

    // Test: to_string() on resulting paths
    if (test_integration_to_string()) {
        passed++;
        stdout.puts("PASS: test_integration_to_string\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_integration_to_string\n");
    }

    // Test: Path operations (parent, append_child)
    if (test_integration_path_operations()) {
        passed++;
        stdout.puts("PASS: test_integration_path_operations\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_integration_path_operations\n");
    }

    // Test: Round-trip encode/decode
    if (test_round_trip()) {
        passed++;
        stdout.puts("PASS: test_round_trip\n");
    } else {
        failed++;
        stdout.puts("FAIL: test_round_trip\n");
    }

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

// ========================================
// 1. Basic Path Construction Tests
// ========================================

// Test: Single segment path
bool test_basic_single_segment() {
    var path = SafePath.path("catalogue", null);
    
    if (path.is_root) return false;
    if (path.depth != 1) return false;
    if (path.name != "catalogue") return false;
    if (path.to_string() != "/catalogue") return false;
    
    return true;
}

// Test: Multi-segment path
bool test_basic_multi_segment() {
    var path = SafePath.path("catalogue", "category", "document", null);
    
    if (path.is_root) return false;
    if (path.depth != 3) return false;
    if (path.name != "document") return false;
    if (path.to_string() != "/catalogue/category/document") return false;
    
    return true;
}

// Test: Empty segments handling
bool test_basic_empty_segments() {
    // Empty string segment should be preserved as empty encoded segment
    var path = SafePath.path("a", "", "c", null);
    
    // Empty segments should still be counted
    if (path.depth != 3) return false;
    
    return true;
}

// ========================================
// 2. URL Encoding Tests
// ========================================

// Test: Spaces in segments (should be encoded as %20)
bool test_encoding_spaces() {
    var path = SafePath.path("users", "john doe", null);
    string path_str = path.to_string();
    
    // Space should be encoded as %20
    if (!path_str.contains("%20")) return false;
    if (path_str.contains(" ")) return false;  // No literal space
    if (path_str != "/users/john%20doe") return false;
    
    // Test multiple spaces
    var path2 = SafePath.path("hello world test", null);
    if (path2.to_string() != "/hello%20world%20test") return false;
    
    return true;
}

// Test: Special characters (/, ?, #, =, &)
bool test_encoding_special_chars() {
    // Forward slash should be encoded
    var path1 = SafePath.path("a/b", null);
    if (!path1.to_string().contains("%2F")) return false;
    
    // Question mark should be encoded
    var path2 = SafePath.path("query?param", null);
    if (!path2.to_string().contains("%3F")) return false;
    
    // Hash should be encoded
    var path3 = SafePath.path("anchor#link", null);
    if (!path3.to_string().contains("%23")) return false;
    
    // Equals should be encoded
    var path4 = SafePath.path("key=value", null);
    if (!path4.to_string().contains("%3D")) return false;
    
    // Ampersand should be encoded
    var path5 = SafePath.path("a&b", null);
    if (!path5.to_string().contains("%26")) return false;
    
    return true;
}

// Test: Unicode characters (Japanese, emoji)
// Note: GLib.Uri.escape_string preserves unicode characters as-is (IRIs)
// This is correct behavior for modern URIs
bool test_encoding_unicode() {
    // Japanese characters - preserved as-is in the path
    var path1 = SafePath.path("ユーザー", null);
    string str1 = path1.to_string();
    // Should contain the unicode characters
    if (!str1.has_prefix("/")) return false;
    if (!str1.contains("ユーザー")) return false;  // Unicode preserved
    
    // Emoji - also preserved
    var path2 = SafePath.path("hello🎉world", null);
    string str2 = path2.to_string();
    if (!str2.contains("🎉")) return false;
    
    // Chinese characters - also preserved
    var path3 = SafePath.path("用户", null);
    string str3 = path3.to_string();
    if (!str3.contains("用户")) return false;
    
    // But special URI characters within unicode strings should still be encoded
    var path4 = SafePath.path("ユーザー/名前", null);
    string str4 = path4.to_string();
    if (!str4.contains("%2F")) return false;  // Slash should be encoded
    
    return true;
}

// Test: Reserved characters that should be encoded
bool test_encoding_reserved_chars() {
    // Test various reserved characters
    string[] reserved_chars = { ":", "/", "?", "#", "[", "]", "@", "!", "$", "&", "'", "(", ")", "*", "+", ",", ";", "=" };
    
    foreach (var ch in reserved_chars) {
        var path = SafePath.path("test" + ch + "value", null);
        string result = path.to_string();
        // Reserved chars should be encoded (contain %)
        // The character itself should not appear literally (except for special cases)
        if (ch != "/" && result.contains(ch) && !result.contains("%")) {
            return false;
        }
    }
    
    return true;
}

// ========================================
// 3. Variadic API Tests
// ========================================

// Test: Null as first argument (should return root path)
bool test_variadic_null_first() {
    var path = SafePath.path(null);
    
    if (!path.is_root) return false;
    if (path.depth != 0) return false;
    if (path.to_string() != "/") return false;
    
    return true;
}

// Test: Single segment + null
bool test_variadic_single_segment() {
    var path = SafePath.path("catalogue", null);
    
    if (path.is_root) return false;
    if (path.depth != 1) return false;
    if (path.name != "catalogue") return false;
    
    return true;
}

// Test: Multiple segments + null
bool test_variadic_multiple_segments() {
    var path = SafePath.path("a", "b", "c", "d", "e", null);
    
    if (path.depth != 5) return false;
    if (path.to_string() != "/a/b/c/d/e") return false;
    
    // Verify each segment
    if (path.name != "e") return false;
    if (path.parent.name != "d") return false;
    
    return true;
}

// ========================================
// 4. Array API Tests
// ========================================

// Test: Normal array of segments
bool test_array_normal() {
    string[] segments = { "catalogue", "category", "document" };
    var path = SafePath.from_array(segments);
    
    if (path.depth != 3) return false;
    if (path.to_string() != "/catalogue/category/document") return false;
    if (path.name != "document") return false;
    
    return true;
}

// Test: Empty array (should return root path)
bool test_array_empty() {
    string[] segments = { };
    var path = SafePath.from_array(segments);
    
    if (!path.is_root) return false;
    if (path.depth != 0) return false;
    if (path.to_string() != "/") return false;
    
    return true;
}

// Test: Array with special characters
bool test_array_special_chars() {
    string[] segments = { "user name", "doc/with/slashes", "query?test" };
    var path = SafePath.from_array(segments);
    
    if (path.depth != 3) return false;
    
    string path_str = path.to_string();
    
    // Verify encoding
    if (!path_str.contains("%20")) return false;  // Space encoded
    if (!path_str.contains("%2F")) return false;  // Slash encoded
    if (!path_str.contains("%3F")) return false;  // Question mark encoded
    
    return true;
}

// ========================================
// 5. Decode Tests
// ========================================

// Test: Decoding %20 to space
bool test_decode_space() {
    try {
        string decoded = SafePath.decode_segment("john%20doe");
        if (decoded != "john doe") return false;
        
        // Multiple spaces
        string decoded2 = SafePath.decode_segment("hello%20world%20test");
        if (decoded2 != "hello world test") return false;
        
        return true;
    } catch (EntityError e) {
        stdout.printf("Unexpected error: %s\n", e.message);
        return false;
    }
}

// Test: Decoding %2F to /
bool test_decode_slash() {
    try {
        string decoded = SafePath.decode_segment("path%2Fwith%2Fslashes");
        if (decoded != "path/with/slashes") return false;
        
        return true;
    } catch (EntityError e) {
        stdout.printf("Unexpected error: %s\n", e.message);
        return false;
    }
}

// Test: Decoding unicode percent-encoded strings
bool test_decode_unicode() {
    try {
        // Japanese characters encoded
        string decoded = SafePath.decode_segment("%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC");
        if (decoded != "ユーザー") return false;
        
        // Emoji encoded
        string decoded2 = SafePath.decode_segment("hello%F0%9F%8E%89world");
        if (decoded2 != "hello🎉world") return false;
        
        return true;
    } catch (EntityError e) {
        stdout.printf("Unexpected error: %s\n", e.message);
        return false;
    }
}

// Test: Invalid encoding error handling
bool test_decode_invalid_encoding() {
    // Invalid percent encoding - incomplete sequence
    try {
        SafePath.decode_segment("invalid%");
        return false;  // Should have thrown
    } catch (EntityError e) {
        // Expected - continue to test more cases
    }
    
    // Invalid hex digits
    try {
        SafePath.decode_segment("invalid%GG");
        return false;  // Should have thrown
    } catch (EntityError e) {
        // Expected
    }
    
    // Incomplete percent sequence at end
    try {
        SafePath.decode_segment("test%2");
        return false;  // Should have thrown
    } catch (EntityError e) {
        // Expected
    }
    
    return true;
}

// ========================================
// 6. Integration Tests
// ========================================

// Test: Verify returned EntityPath works correctly
bool test_integration_entity_path() {
    var path = SafePath.path("catalogue", "category", null);
    
    // Test is_root
    if (path.is_root) return false;
    
    // Test depth
    if (path.depth != 2) return false;
    
    // Test name
    if (path.name != "category") return false;
    
    // Test parent
    var parent = path.parent;
    if (parent.depth != 1) return false;
    if (parent.name != "catalogue") return false;
    
    // Test is_ancestor_of / is_descendant_of
    if (!parent.is_ancestor_of(path)) return false;
    if (!path.is_descendant_of(parent)) return false;
    
    return true;
}

// Test: to_string() on resulting paths
bool test_integration_to_string() {
    // Simple path
    var path1 = SafePath.path("a", null);
    if (path1.to_string() != "/a") return false;
    
    // Multi-segment path
    var path2 = SafePath.path("a", "b", "c", null);
    if (path2.to_string() != "/a/b/c") return false;
    
    // Root path
    var path3 = SafePath.path(null);
    if (path3.to_string() != "/") return false;
    
    // Path with encoded characters
    var path4 = SafePath.path("hello world", null);
    if (path4.to_string() != "/hello%20world") return false;
    
    // Array API
    string[] segments = { "x", "y", "z" };
    var path5 = SafePath.from_array(segments);
    if (path5.to_string() != "/x/y/z") return false;
    
    return true;
}

// Test: Path operations (parent, append_child)
bool test_integration_path_operations() {
    var path = SafePath.path("catalogue", "category", null);
    
    // Test parent
    var parent = path.parent;
    if (parent.to_string() != "/catalogue") return false;
    
    // Test append_child - note: EntityPath.append_child does NOT encode
    // It expects pre-encoded segment names
    var child = path.append_child("document");
    if (child.to_string() != "/catalogue/category/document") return false;
    if (child.name != "document") return false;
    
    // Test parent chain
    if (!child.parent.equals(path)) return false;
    
    // To add a child with special chars, use SafePath to encode first
    // or manually encode the segment
    var child_with_space = path.append_child("my%20document");
    if (!child_with_space.to_string().contains("%20")) return false;
    
    return true;
}

// Test: Round-trip encode/decode
bool test_round_trip() {
    try {
        // Test with spaces
        string original1 = "john doe";
        var path1 = SafePath.path(original1, null);
        string encoded_name1 = path1.name;
        string decoded1 = SafePath.decode_segment(encoded_name1);
        if (decoded1 != original1) return false;
        
        // Test with special characters
        string original2 = "a/b?c#d=e&f";
        var path2 = SafePath.path(original2, null);
        string encoded_name2 = path2.name;
        string decoded2 = SafePath.decode_segment(encoded_name2);
        if (decoded2 != original2) return false;
        
        // Test with unicode
        string original3 = "ユーザー🎉";
        var path3 = SafePath.path(original3, null);
        string encoded_name3 = path3.name;
        string decoded3 = SafePath.decode_segment(encoded_name3);
        if (decoded3 != original3) return false;
        
        return true;
    } catch (EntityError e) {
        stdout.printf("Unexpected error in round-trip: %s\n", e.message);
        return false;
    }
}