import { defineConfig, devices } from '@playwright/test';

/**
 * Playwright Configuration
 *
 * This configuration follows best practices for E2E testing:
 * - Retries for flaky test handling
 * - Parallel execution for speed
 * - Screenshots and traces on failure
 * - Multiple browser support
 */

export default defineConfig({
  // Test directory
  testDir: './tests',

  // Maximum time one test can run
  timeout: 30 * 1000,

  // Run tests in parallel
  fullyParallel: true,

  // Fail the build on CI if you accidentally left test.only in the source code
  forbidOnly: !!process.env.CI,

  // Retry on CI only
  retries: process.env.CI ? 2 : 1,

  // Number of parallel workers
  workers: process.env.CI ? 1 : undefined,

  // Reporter to use
  reporter: [
    ['html'],
    ['list'],
    // Add JUnit reporter for CI
    ...(process.env.CI ? [['junit', { outputFile: 'test-results/junit.xml' }]] : []),
  ],

  // Shared settings for all projects
  use: {
    // Base URL to use in actions like `await page.goto('/')`
    baseURL: process.env.BASE_URL || 'http://localhost:3000',

    // Collect trace when retrying the failed test
    trace: 'on-first-retry',

    // Take screenshot on failure
    screenshot: 'only-on-failure',

    // Capture video on first retry
    video: 'retain-on-failure',

    // Maximum time for each action (e.g., click, fill)
    actionTimeout: 10 * 1000,

    // Maximum time for navigation actions
    navigationTimeout: 30 * 1000,
  },

  // Configure projects for major browsers
  projects: [
    {
      name: 'chromium',
      use: { ...devices['Desktop Chrome'] },
    },

    {
      name: 'firefox',
      use: { ...devices['Desktop Firefox'] },
    },

    {
      name: 'webkit',
      use: { ...devices['Desktop Safari'] },
    },

    // Test against mobile viewports
    // {
    //   name: 'Mobile Chrome',
    //   use: { ...devices['Pixel 5'] },
    // },
    // {
    //   name: 'Mobile Safari',
    //   use: { ...devices['iPhone 12'] },
    // },

    // Test against branded browsers
    // {
    //   name: 'Microsoft Edge',
    //   use: { ...devices['Desktop Edge'], channel: 'msedge' },
    // },
    // {
    //   name: 'Google Chrome',
    //   use: { ...devices['Desktop Chrome'], channel: 'chrome' },
    // },
  ],

  // Run your local dev server before starting the tests
  // webServer: {
  //   command: 'npm run dev',
  //   url: 'http://localhost:3000',
  //   reuseExistingServer: !process.env.CI,
  //   timeout: 120 * 1000,
  // },
});