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

const __dirname = path.dirname(fileURLToPath(import.meta.url))
const authFile = path.join(__dirname, 'e2e/.auth/user.json')

// NOTE: the frontend origin is deliberately `http://localhost:5173`, never
// `127.0.0.1` — Vite's dev server binds IPv6 `::1`, and on macOS
// `127.0.0.1` can silently miss it (see the matching comment in
// vite.config.ts's proxy target, which uses 127.0.0.1 for the *backend* for
// the opposite reason: to dodge a stray IPv6 listener there).
const FRONTEND_URL = 'http://localhost:5173'
const BACKEND_HEALTH_URL = 'http://127.0.0.1:8000/health'

export default defineConfig({
  testDir: './e2e',
  globalSetup: './e2e/global-setup.ts',
  fullyParallel: true,
  forbidOnly: !!process.env.CI,
  retries: process.env.CI ? 1 : 0,
  // A fresh suite against a single shared demo workspace — keep it to one
  // worker in CI until it's proven flake-free under parallel load. Left
  // unset locally so Playwright picks its usual CPU-based default.
  ...(process.env.CI ? { workers: 1 } : {}),
  reporter: process.env.CI ? [['github'], ['html', { open: 'never' }]] : 'list',
  use: {
    baseURL: FRONTEND_URL,
    // Pinned so translated labels/aria-labels used as selectors (e.g.
    // "Välj månad") are deterministic regardless of the host machine's
    // locale — the app defaults to Swedish or English based on
    // `navigator.language` (see LanguageContext.tsx).
    locale: 'sv-SE',
    trace: 'retain-on-failure',
    screenshot: 'only-on-failure',
  },
  webServer: [
    {
      command: 'uv run uvicorn app.main:app --port 8000',
      cwd: path.resolve(__dirname, '../backend'),
      url: BACKEND_HEALTH_URL,
      // The backend rate-limits per remote IP (slowapi's
      // `get_remote_address`), which assumes one IP is one client. This
      // suite breaks that assumption: every page load in the whole run
      // comes from 127.0.0.1. `POST /api/auth/refresh` fires once per page
      // load (AuthProvider re-obtains the access token on mount, see
      // AuthContext.tsx) and is capped at 30/minute, so a ~20-test run's
      // ~50 refreshes start returning 429 partway through — and a failed
      // refresh renders the login screen, which is why unrelated specs
      // failed on `getByTestId('dashboard')`/`('calendar')` not being
      // found. Raising the cap would only move the cliff and make green-ness
      // a function of machine speed; the limiter simply does not apply to a
      // single-IP test runner, so it is switched off here.
      env: { APP_RATE_LIMIT_ENABLED: 'false' },
      reuseExistingServer: !process.env.CI,
      timeout: 60_000,
    },
    {
      command: 'npx vite --port 5173 --strictPort',
      cwd: __dirname,
      url: FRONTEND_URL,
      reuseExistingServer: !process.env.CI,
      timeout: 60_000,
    },
  ],
  projects: [
    { name: 'setup', testMatch: /.*\.setup\.ts/ },
    {
      name: 'chromium',
      use: { ...devices['Desktop Chrome'], storageState: authFile },
      dependencies: ['setup'],
    },
  ],
})