import path from 'path'
import { mkdtempSync, rmSync, existsSync } from 'fs'
import { join } from 'path'
import { tmpdir } from 'os'
import { test, expect, _electron as electron, type Page } from '@playwright/test'

const ROOT = path.join(import.meta.dirname, '..')

async function launchApp(userDataDir: string) {
  return electron.launch({
    args: [ROOT],
    env: {
      ...process.env,
      BILIN_E2E: '1',
      BILIN_E2E_USER_DATA: userDataDir
    }
  })
}

async function skipOnboarding(page: Page): Promise<void> {
  await page.waitForLoadState('domcontentloaded')
  await expect(page.locator('#app')).toBeVisible({ timeout: 20_000 })
  if (await page.getByText('欢迎使用笔临').isVisible()) {
    await page.getByRole('button', { name: '跳过' }).click()
    await expect(page.getByText('欢迎使用笔临')).toBeHidden({ timeout: 10_000 })
  }
}

async function openSettings(page: Page): Promise<void> {
  await page.getByRole('button', { name: /系统设置/ }).click()
  await expect(page.locator('#settings-page')).toBeVisible()
}

test.describe('Settings', () => {
  let userDataDir: string

  test.beforeEach(() => {
    userDataDir = mkdtempSync(join(tmpdir(), 'bilin-e2e-settings-'))
  })

  test.afterEach(() => {
    if (userDataDir && existsSync(userDataDir)) {
      try {
        rmSync(userDataDir, { recursive: true, force: true, maxRetries: 3, retryDelay: 200 })
      } catch {
        /* ignore */
      }
    }
  })

  test('E2E-THEME: all 7 themes apply data-theme attribute', async () => {
    const themes = ['default', 'bamboo', 'moonlit', 'ricepaper', 'mist', 'teagarden', 'twilight'] as const
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await openSettings(page)

    for (const theme of themes) {
      await page.getByTestId('settings-theme').selectOption(theme)
      const attr = await page.evaluate(() => document.documentElement.getAttribute('data-theme'))
      if (theme === 'default') {
        expect(attr).toBeNull()
      } else {
        expect(attr).toBe(theme)
      }
    }

    await app.close()
  })

  test('E2E-I18N: language switch updates UI text', async () => {
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await openSettings(page)

    await expect(page.getByRole('heading', { name: '系统设置' })).toBeVisible()
    await page.getByTestId('settings-language').selectOption('en')
    await expect(page.getByRole('heading', { name: 'Settings' })).toBeVisible({ timeout: 5_000 })
    await expect(page.locator('.settings-nav-item.active')).toHaveText('General')

    await page.getByTestId('settings-language').selectOption('zh-CN')
    await expect(page.getByText('通用')).toBeVisible({ timeout: 5_000 })

    await app.close()
  })
})