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')
  if (await page.getByText('欢迎使用笔临').isVisible()) {
    await page.getByRole('button', { name: '跳过' }).click()
  }
}

async function dismissCockpitIfOpen(page: Page): Promise<void> {
  const cockpit = page.locator('[data-testid="cockpit-modal"]')
  try {
    await cockpit.waitFor({ state: 'visible', timeout: 15_000 })
    await cockpit.locator('.modal-close').click()
    await expect(cockpit).toBeHidden({ timeout: 5000 })
  } catch {
    /* cockpit did not open */
  }
}

async function createAndOpenBook(page: Page): Promise<void> {
  await page.getByRole('button', { name: /新建书籍/ }).first().click()
  await page.locator('.dialog-content input').first().fill('覆盖度测试')
  await page.getByRole('button', { name: '创建' }).click()
  await expect(page.locator('#editor-layout')).toBeVisible({ timeout: 15_000 })
  await dismissCockpitIfOpen(page)
}

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

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

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

  test('E2E-COV-01: uncovered outline shows warning border', async () => {
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await createAndOpenBook(page)
    await page.getByTestId('sidebar-tab-outline').click()
    await page.getByTestId('outline-new').click()
    await expect(page.locator('.outline-item[data-uncovered="true"]').first()).toBeVisible({
      timeout: 10_000
    })
    await expect(page.locator('[data-testid="outline-warn"]').first()).toBeVisible()
    await app.close()
  })

  test('E2E-COV-02: filter uncovered hides covered items', async () => {
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await createAndOpenBook(page)
    await page.getByTestId('sidebar-tab-outline').click()
    await page.getByTestId('outline-new').click()
    await expect(page.locator('.outline-item').first()).toBeVisible({ timeout: 10_000 })
    await page.getByTestId('outline-filter').selectOption('uncovered')
    await expect(page.locator('.outline-item[data-uncovered="true"]')).toHaveCount(1)
    await app.close()
  })
})