import { defineConfig, devices, PlaywrightTestConfig } from '@playwright/test'
import path from 'path'
import { fileURLToPath } from 'url'

// ES module equivalent of __dirname
const __filename = fileURLToPath(import.meta.url)
const __dirname = path.dirname(__filename)

/**
 * Shared Base Playwright Configuration
 *
 * This configuration provides common defaults for all apps in the monorepo.
 * Each app extends this config and overrides specific settings as needed.
 *
 * Test outputs are centralized to /test-output/{app-name}/ in monorepo root.
 * This keeps test results organized and prevents git tracking issues.
 *
 * @see https://playwright.dev/docs/test-configuration
 */

export type DevicePreset =
  | 'desktop'
  | 'mobile'
  | 'tablet'
  | 'obs-overlay'
  | 'chromium-only'
  | 'all'

export interface ClusterModeOptions {
  /** Enable cluster mode (defaults to E2E_USE_CLUSTER env var) */
  enabled?: boolean
  /** Deployment name for nginx routing (e.g., 'fanclub', 'private/channel') */
  deploymentName?: string
  /** App name for cluster manager (e.g., 'fan-club', 'channel-studio') */
  appName?: string
  /** Cluster manager script to use (default: 'e2e-cluster-start.js') */
  clusterScript?: 'e2e-cluster-start.js' | 'e2e-wrapper.js'
  /** Cluster startup timeout in ms (default: 180000) */
  clusterTimeout?: number
}

export interface SharedPlaywrightConfigOptions {
  /** Base URL for the app (e.g., 'http://localhost:3000') */
  baseURL?: string
  /** Port for the dev server (e.g., 3000) */
  port?: number
  /** Test directory relative to app root (default: './e2e') */
  testDir?: string
  /** Dev server start command (default: 'pnpm dev') */
  devCommand?: string
  /** Maximum test timeout in milliseconds (default: 30000) */
  timeout?: number
  /** Whether to run tests in parallel (default: true) */
  fullyParallel?: boolean
  /** Number of workers (default: CI ? 1 : undefined) */
  workers?: number
  /** Number of retries on failure (default: CI ? 2 : 0) */
  retries?: number
  /** Whether to reuse existing dev server (default: !CI) */
  reuseServer?: boolean
  /** App name for centralized output directory (e.g., 'fan-club') */
  appName?: string
  /** Device preset to use (default: 'desktop') */
  devicePreset?: DevicePreset
  /** Cluster mode configuration */
  clusterMode?: ClusterModeOptions
  /** Auth setup project configuration */
  authSetup?: {
    /** Enable auth setup project (default: false) */
    enabled: boolean
    /** Auth storage state path (default: 'e2e/.auth/performer.json') */
    storagePath?: string
  }
  /** Environment variables for dev server (e.g., { VITE_ENABLE_MSW: 'true' }) */
  env?: Record<string, string>
}

/**
 * Creates a Playwright config with shared defaults
 * Apps can extend this and override specific settings
 */
export function createPlaywrightConfig(
  options: SharedPlaywrightConfigOptions = {}
): PlaywrightTestConfig {
  const {
    baseURL: userBaseURL,
    port: userPort,
    testDir = './e2e',
    devCommand = 'pnpm dev',
    timeout = 30000,
    fullyParallel = true,
    workers = process.env.CI ? 1 : undefined,
    retries = process.env.CI ? 2 : 0,
    reuseServer = !process.env.CI,
    appName,
    devicePreset = 'desktop',
    clusterMode,
    authSetup,
    env: envVars,
  } = options

  // Determine if cluster mode is enabled
  const useCluster = clusterMode?.enabled ?? process.env.E2E_USE_CLUSTER === 'true'

  // Determine deployment name and base URL
  const deploymentName = clusterMode?.deploymentName || process.env.E2E_DEPLOYMENT || 'app'
  const clusterAppName = clusterMode?.appName || appName || 'app'

  // Cluster mode uses nginx routing, standalone uses direct port
  const defaultPort = useCluster ? 80 : 3000
  const port = userPort ?? defaultPort

  const defaultBaseURL = useCluster
    ? `http://localhost/${deploymentName}`
    : `http://localhost:${port}`
  const baseURL = userBaseURL ?? defaultBaseURL

  // Determine monorepo root (assumes this package is in @packages/config)
  const monorepoRoot = path.resolve(__dirname, '../..')

  // Centralized test output directory
  const outputDir = appName
    ? path.join(monorepoRoot, 'test-output', appName)
    : 'test-results' // Fallback for apps not using appName

  // Select device projects based on preset
  const projects = getDeviceProjects(devicePreset, authSetup)

  // Build webServer configuration
  const clusterScript = clusterMode?.clusterScript || 'e2e-cluster-start.js'
  const clusterTimeout = clusterMode?.clusterTimeout || 180000

  // Build environment variables string for command prefix
  const envPrefix = envVars
    ? Object.entries(envVars)
        .map(([key, value]) => `${key}=${value}`)
        .join(' ') + ' '
    : ''

  const webServer = useCluster
    ? {
        // Cluster mode: Use cluster manager script
        command: `node ../../scripts/cluster-manager/${clusterScript}`,
        url: baseURL,
        port: clusterScript === 'e2e-wrapper.js' ? port : undefined,
        reuseExistingServer: reuseServer,
        timeout: clusterTimeout,
        env: {
          E2E_APP: clusterAppName,
          E2E_DEPLOYMENT: deploymentName,
          ...(envVars || {}),
        },
      }
    : {
        // Standalone mode: Prefix command with env vars for Vite to pick them up
        command: `${envPrefix}${devCommand}`,
        port,
        reuseExistingServer: reuseServer,
        timeout: 120000,
        stdout: 'ignore',
        stderr: 'pipe',
      }

  return defineConfig({
    testDir,
    timeout,
    fullyParallel,
    forbidOnly: !!process.env.CI,
    retries,
    workers,

    // Shared reporter configuration
    reporter: [
      ['list'],
      ['html', { outputFolder: path.join(outputDir, 'html-report'), open: 'never' }],
      ['junit', { outputFile: path.join(outputDir, 'junit.xml') }],
      ...(process.env.CI ? [['github' as const]] : []),
    ],

    // Shared expect configuration
    expect: {
      timeout: 5000,
    },

    // Shared test configuration
    use: {
      baseURL,
      headless: true,
      trace: 'on-first-retry',
      screenshot: 'only-on-failure',
      video: 'retain-on-failure',
      actionTimeout: 10000,
      navigationTimeout: 15000,
    },

    // Device-specific projects
    projects,

    // Dev server configuration
    webServer,

    // Centralized output directory
    outputDir: path.join(outputDir, 'test-results'),
  })
}

/**
 * Get device projects based on preset
 */
function getDeviceProjects(
  preset: DevicePreset,
  authSetup?: SharedPlaywrightConfigOptions['authSetup']
) {
  const projects: any[] = []

  // Add auth setup project if enabled
  if (authSetup?.enabled) {
    const storagePath = authSetup.storagePath || 'e2e/.auth/performer.json'
    projects.push({
      name: 'setup',
      testMatch: /.*\.setup\.ts/,
      use: {
        storageState: undefined, // Don't load auth for setup
      },
    })

    // Helper to add device with auth
    const addAuthDevice = (name: string, device: any) => {
      projects.push({
        name,
        use: {
          ...device,
          storageState: storagePath,
          serviceWorkers: 'block', // Prevent service worker caching issues
        },
        dependencies: ['setup'],
      })
    }

    // Build device projects with auth
    switch (preset) {
      case 'chromium-only':
        addAuthDevice('chromium', devices['Desktop Chrome'])
        break
      case 'desktop':
        addAuthDevice('chromium', devices['Desktop Chrome'])
        addAuthDevice('firefox', devices['Desktop Firefox'])
        break
      case 'mobile':
        addAuthDevice('mobile-chrome', devices['Pixel 5'])
        addAuthDevice('mobile-safari', devices['iPhone 13'])
        break
      case 'tablet':
        addAuthDevice('ipad-pro', devices['iPad Pro'])
        break
      case 'obs-overlay':
        addAuthDevice('chromium', devices['Desktop Chrome'])
        addAuthDevice('obs-overlay', {
          ...devices['Desktop Chrome'],
          viewport: { width: 1920, height: 1080 },
          hasTouch: false,
          reducedMotion: 'no-preference',
        })
        break
      case 'all':
        addAuthDevice('chromium', devices['Desktop Chrome'])
        addAuthDevice('firefox', devices['Desktop Firefox'])
        addAuthDevice('webkit', devices['Desktop Safari'])
        addAuthDevice('mobile-chrome', devices['Pixel 5'])
        addAuthDevice('mobile-safari', devices['iPhone 13'])
        break
    }
  } else {
    // No auth setup - return standard device projects
    switch (preset) {
      case 'chromium-only':
        projects.push({
          name: 'chromium',
          use: { ...devices['Desktop Chrome'] },
        })
        break
      case 'desktop':
        projects.push(
          {
            name: 'chromium',
            use: { ...devices['Desktop Chrome'] },
          },
          {
            name: 'firefox',
            use: { ...devices['Desktop Firefox'] },
          }
        )
        break
      case 'mobile':
        projects.push(
          {
            name: 'mobile-chrome',
            use: { ...devices['Pixel 5'] },
          },
          {
            name: 'mobile-safari',
            use: { ...devices['iPhone 13'] },
          }
        )
        break
      case 'tablet':
        projects.push({
          name: 'ipad-pro',
          use: { ...devices['iPad Pro'] },
        })
        break
      case 'obs-overlay':
        projects.push(
          {
            name: 'chromium',
            use: { ...devices['Desktop Chrome'] },
          },
          {
            name: 'obs-overlay',
            use: {
              ...devices['Desktop Chrome'],
              viewport: { width: 1920, height: 1080 },
              hasTouch: false,
              reducedMotion: 'no-preference',
            },
          }
        )
        break
      case 'all':
        projects.push(
          {
            name: 'chromium',
            use: { ...devices['Desktop Chrome'] },
          },
          {
            name: 'firefox',
            use: { ...devices['Desktop Firefox'] },
          },
          {
            name: 'webkit',
            use: { ...devices['Desktop Safari'] },
          },
          {
            name: 'mobile-chrome',
            use: { ...devices['Pixel 5'] },
          },
          {
            name: 'mobile-safari',
            use: { ...devices['iPhone 13'] },
          }
        )
        break
    }
  }

  return projects
}

/**
 * Default export for apps that just want standard config
 */
export default createPlaywrightConfig()

/**
 * Common device configurations apps can use
 */
export const commonDevices = {
  // Desktop
  desktopChrome: {
    name: 'chromium',
    use: { ...devices['Desktop Chrome'] },
  },
  desktopFirefox: {
    name: 'firefox',
    use: { ...devices['Desktop Firefox'] },
  },
  desktopSafari: {
    name: 'webkit',
    use: { ...devices['Desktop Safari'] },
  },

  // Mobile
  mobileChrome: {
    name: 'mobile-chrome',
    use: { ...devices['Pixel 5'] },
  },
  mobileSafari: {
    name: 'mobile-safari',
    use: { ...devices['iPhone 13'] },
  },

  // Tablet
  ipadPro: {
    name: 'ipad-pro',
    use: { ...devices['iPad Pro'] },
  },

  // OBS Overlay (1920x1080 for OBS Browser Source)
  obsOverlay: {
    name: 'obs-overlay',
    use: {
      ...devices['Desktop Chrome'],
      viewport: { width: 1920, height: 1080 },
      hasTouch: false,
      reducedMotion: 'no-preference',
    },
  },
}