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

/**
 * Playwright configuration for E2E and performance testing.
 *
 * This configuration is optimized for:
 * - Chromium-only testing (required for Lighthouse integration)
 * - Performance audits with playwright-lighthouse
 * - Testing Next.js application across all locales (de, en, sr)
 *
 * @see https://playwright.dev/docs/test-configuration
 */

export default defineConfig({
  // Test directory
  testDir: './tests/e2e',

  // Run tests in files 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 : 0,

  // Opt out of parallel tests on CI
  workers: process.env.CI ? 1 : undefined,

  // Reporter to use
  reporter: [
    ['html', { open: 'never' }],
    ['list'],
  ],

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

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

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

  // Configure projects - Chromium only for Lighthouse compatibility
  projects: [
    {
      name: 'chromium',
      use: {
        ...devices['Desktop Chrome'],
        // Launch options for Lighthouse
        launchOptions: {
          args: ['--remote-debugging-port=9222'],
        },
      },
    },
    // Mobile Chrome for responsive testing
    {
      name: 'mobile-chrome',
      use: {
        ...devices['Pixel 5'],
        launchOptions: {
          args: ['--remote-debugging-port=9223'],
        },
      },
    },
    // Tablet viewport for responsive testing
    {
      name: 'tablet',
      use: {
        viewport: { width: 768, height: 1024 },
        launchOptions: {
          args: ['--remote-debugging-port=9224'],
        },
      },
    },
  ],

  // Configure web server to start before tests
  webServer: {
    command: 'npm run dev',
    url: 'http://localhost:3000',
    reuseExistingServer: !process.env.CI,
    timeout: 120000,
  },

  // Global timeout for each test
  timeout: 60000,

  // Expect timeout
  expect: {
    timeout: 10000,
  },
});