// Integration tests to verify all imports and exports work correctly
// Run with: node integration_tests.js

import { fileURLToPath } from 'url';
import { dirname, join } from 'path';
import fs from 'fs';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
const srcDir = join(__dirname, 'src');

// Test results tracking
let tests = 0;
let passed = 0;
let failed = 0;

function test(description, testFn) {
    tests++;
    try {
        testFn();
        console.log(`✅ ${description}`);
        passed++;
    } catch (error) {
        console.error(`❌ ${description}`);
        console.error(`   Error: ${error.message}`);
        failed++;
    }
}

function assert(condition, message) {
    if (!condition) {
        throw new Error(message);
    }
}

// Helper to check if file exists
function fileExists(filePath) {
    return fs.existsSync(join(srcDir, filePath));
}

// Helper to read file content
function readFile(filePath) {
    return fs.readFileSync(join(srcDir, filePath), 'utf-8');
}

// Helper to extract imports from a file
function extractImports(content) {
    // Handle both single-line and multi-line imports
    const importRegex = /import\s+(?:{[^}]*}|\*\s+as\s+\w+|\w+)\s+from\s+["'](.\/[^"']+)["']/gs;
    const imports = [];
    let match;
    while ((match = importRegex.exec(content)) !== null) {
        imports.push(match[1]);
    }
    return imports;
}

// Helper to extract exports from a file
function extractExports(content) {
    const exportRegex = /export\s+(?:async\s+)?(?:function|const|let|var|class)\s+([a-zA-Z_$][a-zA-Z0-9_$]*)/g;
    const exports = [];
    let match;
    while ((match = exportRegex.exec(content)) !== null) {
        exports.push(match[1]);
    }
    return exports;
}

console.log('🧪 Running Integration Tests for Refactored UI Modules\n');

// Test 1: Verify all core files exist
test('All core JavaScript files exist', () => {
    const coreFiles = [
        'ui.js',
        'uncloseai-embed-modal.js',
        'widget-library.js',
        'tts-modal.js',
        'translate-modal.js',
        'file-upload.js',
        'chat.js',
        'content.js',
        'ui-themes.js',
        'ui-translations.js',
        'translation.js',
        'config.js',
        'tts.js'
    ];
    
    coreFiles.forEach(file => {
        assert(fileExists(file), `File ${file} does not exist`);
    });
});

// Test 2: Verify ui.js imports are correct
test('ui.js has all required imports', () => {
    const uiContent = readFile('ui.js');
    const imports = extractImports(uiContent);
    
    const requiredImports = [
        './config.js',
        './content.js',
        './language-detection.js',
        './tts.js',
        './ui-themes.js',
        './ui-translations.js',
        './translation.js',
        './tts-modal.js',
        './translate-modal.js',
        './widget-library.js',
        './uncloseai-embed-modal.js',
        './chat.js',
        './file-upload.js',
        './page-reader.js'
    ];
    
    requiredImports.forEach(imp => {
        assert(imports.includes(imp), `ui.js missing import: ${imp}`);
    });
});

// Test 3: Verify all imported files exist
test('All imported files exist', () => {
    const uiContent = readFile('ui.js');
    const imports = extractImports(uiContent);
    
    imports.forEach(importPath => {
        const filePath = importPath.replace('./', '');
        assert(fileExists(filePath), `Imported file does not exist: ${filePath}`);
    });
});

// Test 4: Verify widget-library.js exports expected functions
test('widget-library.js exports required functions', () => {
    const content = readFile('widget-library.js');
    const exports = extractExports(content);
    
    const requiredExports = [
        'createFullInterface',
        'createCustomInterface',
        'createChatFeature',
        'createTTSFeature',
        'createUploadFeature',
        'createTranslateFeature',
        'createSmartTranslateFeature',
        'createReadFeature',
        'createButton',
        'handleTTSFromElement',
        'handleUploadFromElement',
        'handleSmartTranslate'
    ];
    
    requiredExports.forEach(exp => {
        assert(exports.includes(exp), `widget-library.js missing export: ${exp}`);
    });
});

// Test 5: Verify uncloseai-embed-modal.js exports modal functions
test('uncloseai-embed-modal.js exports modal functions', () => {
    const content = readFile('uncloseai-embed-modal.js');
    const exports = extractExports(content);
    
    const requiredExports = [
        'openUncloseaiEmbeddedModal',
        'openUncloseaiEmbeddedModalNew'
    ];
    
    requiredExports.forEach(exp => {
        assert(exports.includes(exp), `uncloseai-embed-modal.js missing export: ${exp}`);
    });
});

// Test 6: Verify ui.js exports key functions
test('ui.js exports required functions', () => {
    const content = readFile('ui.js');
    const exports = extractExports(content);
    
    const requiredExports = [
        'createFloatingAIButton',
        'initializeSystem',
        'initializeUncloseaiElements',
        'initializeChatInterface',
        'toggleUncloseaiEmbeddedModal'
    ];
    
    requiredExports.forEach(exp => {
        assert(exports.includes(exp), `ui.js missing export: ${exp}`);
    });
});

// Test 7: Verify tts-modal.js and translate-modal.js exist and export main functions
test('Modal files export their main functions', () => {
    const ttsContent = readFile('tts-modal.js');
    const ttsExports = extractExports(ttsContent);
    assert(ttsExports.includes('openTTSModal'), 'tts-modal.js missing openTTSModal export');
    
    const translateContent = readFile('translate-modal.js');
    const translateExports = extractExports(translateContent);
    assert(translateExports.includes('openTranslateModal'), 'translate-modal.js missing openTranslateModal export');
});

// Test 8: Verify file-upload.js exports upload functions
test('file-upload.js exports upload functions', () => {
    const content = readFile('file-upload.js');
    const exports = extractExports(content);
    
    const requiredExports = [
        'handleFileUpload',
        'uploadFile',
        'showProgressIndicator',
        'hideProgressIndicator',
        'addFileUploadButton'
    ];
    
    requiredExports.forEach(exp => {
        assert(exports.includes(exp), `file-upload.js missing export: ${exp}`);
    });
});

// Test 9: Check for circular imports (basic check)
test('No obvious circular imports detected', () => {
    const files = ['ui.js', 'uncloseai-embed-modal.js', 'widget-library.js', 'tts-modal.js', 'translate-modal.js'];
    
    files.forEach(file => {
        const content = readFile(file);
        const imports = extractImports(content);
        
        // Check if any file imports ui.js (which could create a cycle)
        if (file !== 'ui.js') {
            assert(!imports.includes('./ui.js'), `${file} imports ui.js which could create a circular dependency`);
        }
    });
});

// Test 10: Verify language files structure
test('Language files directory structure is correct', () => {
    const languagesDir = join(srcDir, 'languages');
    assert(fs.existsSync(languagesDir), 'languages directory does not exist');
    
    const indexFile = join(languagesDir, 'index.js');
    assert(fs.existsSync(indexFile), 'languages/index.js does not exist');
    
    // Check for some key language files
    const keyLanguages = ['en.js', 'es.js', 'fr.js', 'zh.js'];
    keyLanguages.forEach(lang => {
        assert(fs.existsSync(join(languagesDir, lang)), `Language file ${lang} does not exist`);
    });
});

// Test 11: Verify no syntax errors in import statements
test('All import statements are syntactically correct', () => {
    const files = fs.readdirSync(srcDir).filter(f => f.endsWith('.js'));
    
    files.forEach(file => {
        const content = readFile(file);
        
        // Check that all imports have proper structure using the same regex as extractImports
        const importMatches = content.match(/import\s+(?:{[^}]*}|\*\s+as\s+\w+|\w+)\s+from\s+["'][^"']+["']/gs);
        const importLines = content.match(/import\s+.*?from\s+.*?["'][^"']+["']/gs);
        
        if (importLines) {
            importLines.forEach(importStatement => {
                assert(
                    importStatement.includes('from') && (importStatement.includes('"') || importStatement.includes("'")),
                    `Invalid import syntax in ${file}: ${importStatement.replace(/\s+/g, ' ').trim()}`
                );
            });
        }
    });
});

// Test 12: Verify ui.js size reduction was successful
test('ui.js is properly reduced in size', () => {
    const content = readFile('ui.js');
    const lines = content.split('\n').length;
    
    // Should be under 600 lines after refactoring (was ~3600 before)
    assert(lines < 600, `ui.js is still too large: ${lines} lines (expected < 600)`);
    console.log(`   ui.js is now ${lines} lines (great reduction!)`);
});

// Test 13: Check for proper error handling in imports
test('No broken import paths detected', () => {
    const files = fs.readdirSync(srcDir).filter(f => f.endsWith('.js'));
    
    files.forEach(file => {
        const content = readFile(file);
        const imports = extractImports(content);
        
        imports.forEach(importPath => {
            if (importPath.startsWith('./')) {
                const targetFile = importPath.replace('./', '');
                assert(
                    fileExists(targetFile),
                    `Broken import in ${file}: ${importPath} -> file ${targetFile} does not exist`
                );
            }
        });
    });
});

// Test 14: Verify global exports are properly set
test('Global window exports are declared', () => {
    const uiContent = readFile('ui.js');
    
    const expectedGlobalExports = [
        'window.openTTSModal',
        'window.openTranslateModal',
        'window.toggleUncloseaiEmbeddedModal'
    ];
    
    expectedGlobalExports.forEach(exp => {
        assert(uiContent.includes(exp), `ui.js missing global export: ${exp}`);
    });
});

// Test 15: Verify proper module structure
test('Modules follow proper ES6 export/import patterns', () => {
    const coreModules = ['widget-library.js', 'uncloseai-embed-modal.js', 'tts-modal.js', 'translate-modal.js'];
    
    coreModules.forEach(file => {
        const content = readFile(file);
        
        // Should have at least one export
        assert(content.includes('export '), `${file} has no exports`);
        
        // Should have proper imports (if any)
        const imports = extractImports(content);
        if (imports.length > 0) {
            imports.forEach(imp => {
                assert(imp.startsWith('./'), `${file} has non-relative import: ${imp}`);
            });
        }
    });
});

// Run summary
console.log('\n📊 Test Results:');
console.log(`Total tests: ${tests}`);
console.log(`Passed: ${passed} ✅`);
console.log(`Failed: ${failed} ❌`);

if (failed === 0) {
    console.log('\n🎉 All integration tests passed! The refactored modules are properly structured.');
    process.exit(0);
} else {
    console.log('\n💥 Some tests failed. Please fix the issues above before deploying.');
    process.exit(1);
}