#!/usr/bin/env node

/**
 * Microservices Architecture Test Script
 * Tests: Frontend (3001) → API Gateway (8000) → Git Integration (8012)
 */

const axios = require('axios');

const SERVICES = {
  FRONTEND: 'http://localhost:3001',
  API_GATEWAY: 'http://localhost:8000',
  GIT_INTEGRATION: 'http://localhost:8012'
};

const TEST_ENDPOINTS = [
  // GitHub Integration Endpoints
  { path: '/api/github/health', method: 'GET', service: 'git-integration' },
  { path: '/api/github/auth/github/status', method: 'GET', service: 'git-integration' },
  
  // Diff Viewer Endpoints
  { path: '/api/diffs/repositories', method: 'GET', service: 'git-integration' },
  
  // AI Streaming Endpoints
  { path: '/api/ai/streaming-sessions', method: 'GET', service: 'git-integration' },
  
  // VCS Endpoints
  { path: '/api/vcs/github/auth/start', method: 'GET', service: 'git-integration' }
];

async function testServiceHealth(serviceName, baseUrl) {
  console.log(`\n🔍 Testing ${serviceName} health...`);
  try {
    const response = await axios.get(`${baseUrl}/health`, { timeout: 5000 });
    console.log(`✅ ${serviceName} is healthy: ${response.status}`);
    return true;
  } catch (error) {
    console.log(`❌ ${serviceName} is unhealthy: ${error.message}`);
    return false;
  }
}

async function testEndpoint(endpoint) {
  console.log(`\n🔍 Testing ${endpoint.method} ${endpoint.path}...`);
  
  // Test direct service call
  try {
    const directUrl = `${SERVICES.GIT_INTEGRATION}${endpoint.path}`;
    const directResponse = await axios({
      method: endpoint.method,
      url: directUrl,
      timeout: 10000,
      validateStatus: () => true
    });
    console.log(`✅ Direct service call: ${directResponse.status}`);
  } catch (error) {
    console.log(`❌ Direct service call failed: ${error.message}`);
  }
  
  // Test through API Gateway
  try {
    const gatewayUrl = `${SERVICES.API_GATEWAY}${endpoint.path}`;
    const gatewayResponse = await axios({
      method: endpoint.method,
      url: gatewayUrl,
      timeout: 10000,
      validateStatus: () => true
    });
    console.log(`✅ Gateway call: ${gatewayResponse.status}`);
  } catch (error) {
    console.log(`❌ Gateway call failed: ${error.message}`);
  }
}

async function testFrontendIntegration() {
  console.log(`\n🔍 Testing Frontend Integration...`);
  
  // Test if frontend is running
  try {
    const response = await axios.get(SERVICES.FRONTEND, { timeout: 5000 });
    console.log(`✅ Frontend is accessible: ${response.status}`);
  } catch (error) {
    console.log(`❌ Frontend is not accessible: ${error.message}`);
    return false;
  }
  
  return true;
}

async function runArchitectureTest() {
  console.log('🚀 Starting Microservices Architecture Test');
  console.log('='.repeat(60));
  
  // Test service health
  const gitIntegrationHealthy = await testServiceHealth('Git Integration Service', SERVICES.GIT_INTEGRATION);
  const apiGatewayHealthy = await testServiceHealth('API Gateway', SERVICES.API_GATEWAY);
  const frontendHealthy = await testFrontendIntegration();
  
  console.log('\n📊 Service Health Summary:');
  console.log(`Git Integration (8012): ${gitIntegrationHealthy ? '✅' : '❌'}`);
  console.log(`API Gateway (8000): ${apiGatewayHealthy ? '✅' : '❌'}`);
  console.log(`Frontend (3001): ${frontendHealthy ? '✅' : '❌'}`);
  
  if (!gitIntegrationHealthy || !apiGatewayHealthy) {
    console.log('\n❌ Critical services are down. Please start the services first.');
    console.log('Run: docker-compose up -d');
    return;
  }
  
  // Test endpoints
  console.log('\n🔍 Testing Endpoints...');
  for (const endpoint of TEST_ENDPOINTS) {
    await testEndpoint(endpoint);
  }
  
  // Test routing flow
  console.log('\n🔍 Testing Routing Flow...');
  console.log('Frontend (3001) → API Gateway (8000) → Git Integration (8012)');
  
  // Test a simple endpoint through the complete flow
  try {
    const testUrl = `${SERVICES.API_GATEWAY}/api/github/health`;
    const response = await axios.get(testUrl, { timeout: 10000 });
    console.log(`✅ Complete flow test: ${response.status}`);
    console.log(`Response: ${JSON.stringify(response.data, null, 2)}`);
  } catch (error) {
    console.log(`❌ Complete flow test failed: ${error.message}`);
  }
  
  console.log('\n🎯 Architecture Test Complete');
  console.log('='.repeat(60));
  
  if (gitIntegrationHealthy && apiGatewayHealthy && frontendHealthy) {
    console.log('✅ All services are healthy and properly configured!');
    console.log('\n📋 Next Steps:');
    console.log('1. Start all services: docker-compose up -d');
    console.log('2. Test frontend at: http://localhost:3001');
    console.log('3. Test API Gateway at: http://localhost:8000');
    console.log('4. Test Git Integration at: http://localhost:8012');
  } else {
    console.log('❌ Some services need attention. Check the logs above.');
  }
}

// Run the test
if (require.main === module) {
  runArchitectureTest().catch(console.error);
}

module.exports = { runArchitectureTest, testServiceHealth, testEndpoint };