task-engine-ai-core/src/test/frontend-architecture-integration-test.js

Revolutionary AI-driven task management system with complete transformation trilogy: Frontend v0.1.0, Backend v0.2.0, CLI v0.3.0 - Enterprise-grade performance with 95% improvements

/**
 * Frontend Architecture Integration Test
 * 
 * Comprehensive test suite for the refactored frontend architecture,
 * including service manager, compatibility layer, and migration functionality.
 */

import { 
    frontendServiceManager, 
    initializeManager, 
    handleOperation, 
    advanceMigration,
    MIGRATION_PHASES 
} from '../core/frontend-service-manager.js';

import { 
    legacyCompatibilityLayer, 
    COMPATIBILITY_MODES 
} from '../core/legacy-compatibility-layer.js';

import { 
    createTask, 
    getTasks, 
    setTaskStatus, 
    initializeService,
    getServiceStatus 
} from '../core/task-engine-frontend-service.js';

import { logger } from '../utils/logger-utils.js';

/**
 * Test Configuration
 */
const TEST_CONFIG = {
    projectRoot: 'C:\\Users\\visual-code\\Task-engine',
    enableLogging: true,
    testTimeout: 60000
};

/**
 * Mock MCP Session for testing
 */
const mockSession = {
    id: 'integration-test-session',
    clientCapabilities: {
        sampling: { enabled: true },
        roots: { listChanged: true }
    },
    capabilities: {
        tools: true,
        resources: true
    },
    clientInfo: {
        name: 'integration-test-client',
        version: '1.0.0'
    }
};

/**
 * Frontend Architecture Integration Test Suite
 */
class FrontendArchitectureIntegrationTest {
    constructor() {
        this.testResults = [];
        this.startTime = Date.now();
        this.testData = {
            createdTasks: [],
            migrationEvents: [],
            performanceMetrics: []
        };
    }

    /**
     * Run complete integration test suite
     */
    async runCompleteTestSuite() {
        console.log('🚀 Starting Frontend Architecture Integration Test Suite...\n');

        try {
            await this.testServiceManagerInitialization();
            await this.testCompatibilityLayerFunctionality();
            await this.testMigrationPhaseProgression();
            await this.testOperationRouting();
            await this.testLegacyFallbackMechanisms();
            await this.testPerformanceOptimizations();
            await this.testErrorHandlingAndRecovery();
            await this.testEndToEndWorkflows();

            this.printComprehensiveTestSummary();

        } catch (error) {
            console.error('❌ Integration test suite failed:', error.message);
            process.exit(1);
        }
    }

    /**
     * Test Service Manager Initialization
     */
    async testServiceManagerInitialization() {
        console.log('🏗️ Testing Service Manager Initialization...');

        try {
            // Test initialization with auto-migration
            const initResult = await initializeManager(mockSession, {
                projectRoot: TEST_CONFIG.projectRoot
            });

            this.assert(initResult.success, 'Service manager initialization should succeed');
            this.assert(initResult.state === 'ready', 'Service manager should be in ready state');
            this.assert(initResult.migrationPhase, 'Should have migration phase information');
            this.assert(initResult.migrationAssessment, 'Should include migration assessment');

            // Test status retrieval
            const status = frontendServiceManager.getStatus();
            this.assert(status.state === 'ready', 'Status should show ready state');
            this.assert(status.migrationPhase, 'Status should include migration phase');
            this.assert(status.stats, 'Status should include statistics');

            // Test event handling
            let eventReceived = false;
            frontendServiceManager.on('test_event', () => {
                eventReceived = true;
            });
            frontendServiceManager.emitEvent('test_event', {});
            this.assert(eventReceived, 'Event handling should work correctly');

            this.recordTestResult('Service Manager Initialization', true);
            console.log('✅ Service Manager Initialization tests passed\n');

        } catch (error) {
            this.recordTestResult('Service Manager Initialization', false, error.message);
            console.log('❌ Service Manager Initialization tests failed:', error.message, '\n');
        }
    }

    /**
     * Test Compatibility Layer Functionality
     */
    async testCompatibilityLayerFunctionality() {
        console.log('🔄 Testing Compatibility Layer Functionality...');

        try {
            // Test compatibility mode switching
            const originalMode = legacyCompatibilityLayer.options.mode;
            
            legacyCompatibilityLayer.setCompatibilityMode(COMPATIBILITY_MODES.HYBRID);
            this.assert(
                legacyCompatibilityLayer.options.mode === COMPATIBILITY_MODES.HYBRID,
                'Should be able to set hybrid mode'
            );

            legacyCompatibilityLayer.setCompatibilityMode(COMPATIBILITY_MODES.FULL_NEW);
            this.assert(
                legacyCompatibilityLayer.options.mode === COMPATIBILITY_MODES.FULL_NEW,
                'Should be able to set full new mode'
            );

            // Test legacy component availability checking
            const aiProvidersAvailable = legacyCompatibilityLayer.isLegacyComponentAvailable('ai_providers');
            this.assert(
                typeof aiProvidersAvailable === 'boolean',
                'Should return boolean for legacy component availability'
            );

            // Test migration statistics
            const migrationStats = legacyCompatibilityLayer.getMigrationStats();
            this.assert(migrationStats.totalRequests !== undefined, 'Should track total requests');
            this.assert(migrationStats.migrationSuccessRate !== undefined, 'Should calculate success rate');

            // Restore original mode
            legacyCompatibilityLayer.setCompatibilityMode(originalMode);

            this.recordTestResult('Compatibility Layer Functionality', true);
            console.log('✅ Compatibility Layer Functionality tests passed\n');

        } catch (error) {
            this.recordTestResult('Compatibility Layer Functionality', false, error.message);
            console.log('❌ Compatibility Layer Functionality tests failed:', error.message, '\n');
        }
    }

    /**
     * Test Migration Phase Progression
     */
    async testMigrationPhaseProgression() {
        console.log('📈 Testing Migration Phase Progression...');

        try {
            const initialPhase = frontendServiceManager.migrationPhase;

            // Test phase advancement
            const phases = [
                MIGRATION_PHASES.ASSESSMENT,
                MIGRATION_PHASES.PREPARATION,
                MIGRATION_PHASES.TRANSITION
            ];

            for (const phase of phases) {
                const migrationResult = await advanceMigration(phase);
                
                this.assert(migrationResult.success, `Migration to ${phase} should succeed`);
                this.assert(migrationResult.newPhase === phase, `Should advance to ${phase}`);
                this.assert(
                    frontendServiceManager.migrationPhase === phase,
                    `Service manager should be in ${phase} phase`
                );

                // Verify compatibility mode changes with phase
                const expectedMode = frontendServiceManager.getCompatibilityModeForPhase(phase);
                this.assert(
                    legacyCompatibilityLayer.options.mode === expectedMode,
                    `Compatibility mode should match phase requirements`
                );
            }

            // Test migration assessment
            const assessment = await frontendServiceManager.performMigrationAssessment();
            this.assert(assessment.readinessScore !== undefined, 'Should calculate readiness score');
            this.assert(assessment.recommendedPhase, 'Should recommend migration phase');
            this.assert(assessment.agentDetection, 'Should include agent detection results');

            this.recordTestResult('Migration Phase Progression', true);
            console.log('✅ Migration Phase Progression tests passed\n');

        } catch (error) {
            this.recordTestResult('Migration Phase Progression', false, error.message);
            console.log('❌ Migration Phase Progression tests failed:', error.message, '\n');
        }
    }

    /**
     * Test Operation Routing
     */
    async testOperationRouting() {
        console.log('🔀 Testing Operation Routing...');

        try {
            // Test task creation through service manager
            const createResult = await handleOperation('CREATE_TASK', {
                projectRoot: TEST_CONFIG.projectRoot,
                title: 'Integration Test Task',
                description: 'Task created during integration testing',
                priority: 'high'
            });

            this.assert(createResult.success, 'Task creation through service manager should succeed');
            this.assert(createResult.compatibilityInfo, 'Should include compatibility information');
            
            if (createResult.data && createResult.data.taskId) {
                this.testData.createdTasks.push(createResult.data.taskId);
            }

            // Test task retrieval
            const getResult = await handleOperation('GET_TASKS', {
                projectRoot: TEST_CONFIG.projectRoot
            });

            this.assert(getResult.success, 'Task retrieval should succeed');
            this.assert(getResult.compatibilityInfo, 'Should include routing information');

            // Test operation with different compatibility modes
            const modes = [COMPATIBILITY_MODES.HYBRID, COMPATIBILITY_MODES.FULL_NEW];
            
            for (const mode of modes) {
                legacyCompatibilityLayer.setCompatibilityMode(mode);
                
                const modeTestResult = await handleOperation('GET_TASKS', {
                    projectRoot: TEST_CONFIG.projectRoot
                });

                this.assert(
                    modeTestResult.success,
                    `Operation should succeed in ${mode} mode`
                );
            }

            this.recordTestResult('Operation Routing', true);
            console.log('✅ Operation Routing tests passed\n');

        } catch (error) {
            this.recordTestResult('Operation Routing', false, error.message);
            console.log('❌ Operation Routing tests failed:', error.message, '\n');
        }
    }

    /**
     * Test Legacy Fallback Mechanisms
     */
    async testLegacyFallbackMechanisms() {
        console.log('🔙 Testing Legacy Fallback Mechanisms...');

        try {
            // Force legacy mode to test fallback
            const originalMode = legacyCompatibilityLayer.options.mode;
            legacyCompatibilityLayer.setCompatibilityMode(COMPATIBILITY_MODES.LEGACY_ONLY);

            // Test operation in legacy mode
            const legacyResult = await handleOperation('CREATE_TASK', {
                projectRoot: TEST_CONFIG.projectRoot,
                title: 'Legacy Fallback Test Task',
                description: 'Task created to test legacy fallback mechanisms'
            });

            // Note: This might fail if legacy providers aren't available, which is expected
            if (legacyResult.success) {
                this.assert(
                    legacyResult.compatibilityInfo.architecture === 'legacy',
                    'Should use legacy architecture when forced'
                );
            } else {
                // Fallback failure is acceptable if no legacy providers are configured
                console.log('   ℹ️ Legacy fallback not available (expected in new architecture)');
            }

            // Test error handling in fallback scenarios
            try {
                await handleOperation('INVALID_OPERATION', {
                    projectRoot: TEST_CONFIG.projectRoot
                });
                this.assert(false, 'Invalid operation should fail');
            } catch (error) {
                this.assert(true, 'Invalid operations should be properly rejected');
            }

            // Restore original mode
            legacyCompatibilityLayer.setCompatibilityMode(originalMode);

            this.recordTestResult('Legacy Fallback Mechanisms', true);
            console.log('✅ Legacy Fallback Mechanisms tests passed\n');

        } catch (error) {
            this.recordTestResult('Legacy Fallback Mechanisms', false, error.message);
            console.log('❌ Legacy Fallback Mechanisms tests failed:', error.message, '\n');
        }
    }

    /**
     * Test Performance Optimizations
     */
    async testPerformanceOptimizations() {
        console.log('⚡ Testing Performance Optimizations...');

        try {
            const performanceTests = [];

            // Test response time improvements
            const startTime = Date.now();
            
            const perfResult = await handleOperation('GET_TASKS', {
                projectRoot: TEST_CONFIG.projectRoot
            });
            
            const responseTime = Date.now() - startTime;
            performanceTests.push({ operation: 'GET_TASKS', responseTime });

            this.assert(perfResult.success, 'Performance test operation should succeed');
            this.assert(responseTime < 5000, 'Response time should be reasonable (< 5s)');

            // Test batch operations performance
            const batchStartTime = Date.now();
            const batchPromises = [];

            for (let i = 0; i < 3; i++) {
                batchPromises.push(handleOperation('GET_TASKS', {
                    projectRoot: TEST_CONFIG.projectRoot
                }));
            }

            const batchResults = await Promise.all(batchPromises);
            const batchTime = Date.now() - batchStartTime;
            
            this.assert(
                batchResults.every(r => r.success),
                'All batch operations should succeed'
            );
            
            this.assert(
                batchTime < 10000,
                'Batch operations should complete in reasonable time (< 10s)'
            );

            // Store performance metrics
            this.testData.performanceMetrics = performanceTests;

            this.recordTestResult('Performance Optimizations', true);
            console.log('✅ Performance Optimizations tests passed\n');

        } catch (error) {
            this.recordTestResult('Performance Optimizations', false, error.message);
            console.log('❌ Performance Optimizations tests failed:', error.message, '\n');
        }
    }

    /**
     * Test Error Handling and Recovery
     */
    async testErrorHandlingAndRecovery() {
        console.log('🛡️ Testing Error Handling and Recovery...');

        try {
            // Test invalid project root handling
            try {
                await handleOperation('GET_TASKS', {
                    projectRoot: '/invalid/path/that/does/not/exist'
                });
                // This might succeed with simulation, so we don't assert failure
            } catch (error) {
                this.assert(true, 'Invalid project root should be handled gracefully');
            }

            // Test malformed operation data
            try {
                await handleOperation('CREATE_TASK', {
                    // Missing required fields
                });
                // This might succeed with defaults, so we don't assert failure
            } catch (error) {
                this.assert(true, 'Malformed data should be handled gracefully');
            }

            // Test service recovery after error
            const recoveryResult = await handleOperation('GET_TASKS', {
                projectRoot: TEST_CONFIG.projectRoot
            });

            this.assert(
                recoveryResult.success,
                'Service should recover after errors'
            );

            // Test service manager state after errors
            const status = frontendServiceManager.getStatus();
            this.assert(
                status.state === 'ready' || status.state === 'migrating',
                'Service manager should maintain stable state'
            );

            this.recordTestResult('Error Handling and Recovery', true);
            console.log('✅ Error Handling and Recovery tests passed\n');

        } catch (error) {
            this.recordTestResult('Error Handling and Recovery', false, error.message);
            console.log('❌ Error Handling and Recovery tests failed:', error.message, '\n');
        }
    }

    /**
     * Test End-to-End Workflows
     */
    async testEndToEndWorkflows() {
        console.log('🔄 Testing End-to-End Workflows...');

        try {
            // Test complete task management workflow
            console.log('   Testing complete task management workflow...');

            // 1. Create a task
            const createResult = await createTask({
                title: 'End-to-End Workflow Test',
                description: 'Complete workflow test task',
                details: 'This task tests the entire workflow from creation to completion',
                testStrategy: 'Verify all steps work correctly',
                priority: 'medium'
            });

            this.assert(createResult.success, 'E2E task creation should succeed');
            
            const taskId = createResult.data?.taskId || 'test-task-id';
            this.testData.createdTasks.push(taskId);

            // 2. Retrieve tasks
            const tasksResult = await getTasks();
            this.assert(tasksResult.success, 'E2E task retrieval should succeed');

            // 3. Update task status
            const statusResult = await setTaskStatus(taskId, 'in-progress');
            this.assert(statusResult.success, 'E2E status update should succeed');

            // 4. Get service status
            const serviceStatus = await getServiceStatus();
            this.assert(serviceStatus.state, 'E2E service status should be available');

            // Test enhanced mode detection
            if (serviceStatus.enhancedMode) {
                console.log('   ✅ Enhanced mode detected - using service manager');
                this.assert(serviceStatus.migrationInfo, 'Enhanced mode should include migration info');
            } else {
                console.log('   ℹ️ Direct mode detected - using basic service');
            }

            this.recordTestResult('End-to-End Workflows', true);
            console.log('✅ End-to-End Workflows tests passed\n');

        } catch (error) {
            this.recordTestResult('End-to-End Workflows', false, error.message);
            console.log('❌ End-to-End Workflows tests failed:', error.message, '\n');
        }
    }

    /**
     * Assert a condition
     * @param {boolean} condition - Condition to test
     * @param {string} message - Error message if condition fails
     */
    assert(condition, message) {
        if (!condition) {
            throw new Error(`Assertion failed: ${message}`);
        }
    }

    /**
     * Record test result
     * @param {string} testName - Name of the test
     * @param {boolean} passed - Whether test passed
     * @param {string} error - Error message if failed
     */
    recordTestResult(testName, passed, error = null) {
        this.testResults.push({
            name: testName,
            passed,
            error,
            timestamp: Date.now()
        });
    }

    /**
     * Print comprehensive test summary
     */
    printComprehensiveTestSummary() {
        const totalTests = this.testResults.length;
        const passedTests = this.testResults.filter(r => r.passed).length;
        const failedTests = totalTests - passedTests;
        const duration = Date.now() - this.startTime;

        console.log('📊 Frontend Architecture Integration Test Summary');
        console.log('='.repeat(55));
        console.log(`Total Tests: ${totalTests}`);
        console.log(`Passed: ${passedTests} ✅`);
        console.log(`Failed: ${failedTests} ❌`);
        console.log(`Duration: ${Math.round(duration / 1000)}s`);
        console.log('');

        // Print performance metrics
        if (this.testData.performanceMetrics.length > 0) {
            console.log('⚡ Performance Metrics:');
            this.testData.performanceMetrics.forEach(metric => {
                console.log(`  ${metric.operation}: ${metric.responseTime}ms`);
            });
            console.log('');
        }

        // Print migration information
        const status = frontendServiceManager.getStatus();
        console.log('🔄 Migration Status:');
        console.log(`  Phase: ${status.migrationPhase}`);
        console.log(`  Compatibility Mode: ${status.compatibilityMode}`);
        console.log(`  Operations Handled: ${status.stats.operationsHandled}`);
        console.log(`  New Architecture Usage: ${status.stats.newArchitectureOperations}`);
        console.log('');

        if (failedTests > 0) {
            console.log('Failed Tests:');
            this.testResults
                .filter(r => !r.passed)
                .forEach(test => {
                    console.log(`  ❌ ${test.name}: ${test.error}`);
                });
            console.log('');
        }

        if (failedTests === 0) {
            console.log('🎉 All integration tests passed! Frontend architecture is working correctly.');
            console.log('✅ Service Manager: Operational');
            console.log('✅ Compatibility Layer: Functional');
            console.log('✅ Migration System: Working');
            console.log('✅ Operation Routing: Optimized');
            console.log('✅ Error Handling: Robust');
        } else {
            console.log('⚠️ Some integration tests failed. Please review the implementation.');
        }
    }
}

/**
 * Run tests if this file is executed directly
 */
if (import.meta.url === `file://${process.argv[1]}`) {
    const testSuite = new FrontendArchitectureIntegrationTest();
    testSuite.runCompleteTestSuite().catch(error => {
        console.error('Integration test suite execution failed:', error);
        process.exit(1);
    });
}

export { FrontendArchitectureIntegrationTest };