/**
 * K6 Test Configuration
 * Centralized configuration for all load tests
 */

// Get environment variables with defaults
export const config = {
  // Base URL for the target server
  get baseUrl() {
    return __ENV.BASE_URL || 'http://localhost:3000';
  },

  // Admin credentials (from environment)
  get adminEmail() {
    return __ENV.ADMIN_EMAIL || 'admin@enchun.tw';
  },

  get adminPassword() {
    return __ENV.ADMIN_PASSWORD || 'admin123';
  },

  // Load testing thresholds (NFR4 requirements)
  thresholds: {
    // Response time thresholds
    httpReqDuration: ['p(95) < 500'], // 95th percentile < 500ms
    httpReqDurationApi: ['p(95) < 300'], // API endpoints < 300ms
    httpReqDurationAdmin: ['p(95) < 700'], // Admin operations < 700ms

    // Error rate thresholds
    httpReqFailed: ['rate < 0.01'], // < 1% error rate
    httpReqFailedApi: ['rate < 0.005'], // API < 0.5% error rate

    // Throughput thresholds
    httpReqs: ['rate > 50'], // > 50 requests/second for pages
    httpReqsApi: ['rate > 100'], // > 100 requests/second for API

    // Check success rate
    checks: ['rate > 0.99'], // 99% of checks should pass
  },

  // Stage configuration for gradual ramp-up
  stages: {
    // Public browsing: 100 users
    publicBrowsing: [
      { duration: '30s', target: 20 },   // Ramp up to 20 users
      { duration: '30s', target: 50 },   // Ramp up to 50 users
      { duration: '1m', target: 100 },   // Ramp up to 100 users
      { duration: '2m', target: 100 },   // Stay at 100 users
      { duration: '30s', target: 0 },    // Ramp down
    ],

    // Admin operations: 20 users
    adminOperations: [
      { duration: '30s', target: 5 },    // Ramp up to 5 users
      { duration: '30s', target: 10 },   // Ramp up to 10 users
      { duration: '30s', target: 20 },   // Ramp up to 20 users
      { duration: '3m', target: 20 },    // Stay at 20 users
      { duration: '30s', target: 0 },    // Ramp down
    ],

    // API performance: 50 users
    apiPerformance: [
      { duration: '1m', target: 10 },    // Ramp up to 10 users
      { duration: '1m', target: 25 },    // Ramp up to 25 users
      { duration: '1m', target: 50 },    // Ramp up to 50 users
      { duration: '5m', target: 50 },    // Stay at 50 users
      { duration: '1m', target: 0 },     // Ramp down
    ],
  },

  // Common request options
  requestOptions: {
    timeout: '30s',           // Request timeout
    maxRedirects: 10,         // Maximum redirects to follow
    discardResponseBodies: true, // Discard response bodies to save memory
  },

  // Common headers
  headers: {
    'User-Agent': 'k6-load-test',
    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
    'Accept-Language': 'en-US,en;q=0.9,zh-TW;q=0.8',
  },
};

// URL helpers
export const urls = {
  get baseUrl() {
    return config.baseUrl;
  },

  // Public pages
  get home() {
    return `${config.baseUrl}/`;
  },
  get about() {
    return `${config.baseUrl}/about`;
  },
  get solutions() {
    return `${config.baseUrl}/solutions`;
  },
  get portfolio() {
    return `${config.baseUrl}/portfolio`;
  },
  get blog() {
    return `${config.baseUrl}/blog`;
  },
  get contact() {
    return `${config.baseUrl}/contact`;
  },

  // API endpoints
  get api() {
    return `${config.baseUrl}/api`;
  },
  get graphql() {
    return `${config.baseUrl}/api/graphql`;
  },
  get global() {
    return `${config.baseUrl}/api/global`;
  },

  // Admin endpoints
  get admin() {
    return `${config.baseUrl}/admin`;
  },
  get collections() {
    return `${config.baseUrl}/api/collections`;
  },
  get pages() {
    return `${config.baseUrl}/api/pages`;
  },
  get posts() {
    return `${config.baseUrl}/api/posts`;
  },
  get portfolioItems() {
    return `${config.baseUrl}/api/portfolio`;
  },
  get categories() {
    return `${config.baseUrl}/api/categories`;
  },

  // Auth endpoints
  get login() {
    return `${config.baseUrl}/api/users/login`;
  },
  get logout() {
    return `${config.baseUrl}/api/users/logout`;
  },
  get me() {
    return `${config.baseUrl}/api/users/me`;
  },
};

// Common checks
export const checks = {
  // HTTP status checks
  status200: (res) => res.status === 200,
  status201: (res) => res.status === 201,
  status204: (res) => res.status === 204,

  // Response time checks
  responseTimeFast: (res) => res.timings.duration < 200,
  responseTimeOk: (res) => res.timings.duration < 500,
  responseTimeSlow: (res) => res.timings.duration < 1000,

  // Content checks
  hasContent: (res) => res.body.length > 0,
  hasJson: (res) => res.headers['Content-Type'].includes('application/json'),

  // Performance checks (NFR4)
  nfr4ResponseTime: (res) => res.timings.duration < 500, // p95 < 500ms
  nfr4ApiResponseTime: (res) => res.timings.duration < 300, // API < 300ms
};

// Threshold groups for different test types
export const thresholdGroups = {
  public: {
    http_req_duration: ['p(95) < 500', 'p(99) < 1000'],
    http_req_failed: ['rate < 0.01'],
    checks: ['rate > 0.99'],
  },

  admin: {
    http_req_duration: ['p(95) < 700', 'p(99) < 1500'],
    http_req_failed: ['rate < 0.01'],
    checks: ['rate > 0.99'],
  },

  api: {
    http_req_duration: ['p(95) < 300', 'p(99) < 500'],
    http_req_failed: ['rate < 0.005'],
    checks: ['rate > 0.995'],
  },
};