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('拖拽测试')
  await page.getByRole('button', { name: '创建' }).click()
  await expect(page.locator('#editor-layout')).toBeVisible({ timeout: 15_000 })
  await dismissCockpitIfOpen(page)
}

async function ensureChapterEditor(page: Page): Promise<void> {
  await dismissCockpitIfOpen(page)
  await page.getByRole('button', { name: '+ 新章' }).click()
  await expect(page.locator('.ProseMirror')).toBeVisible({ timeout: 10_000 })
}

async function dragChapterItem(page: Page, draggedId: string, targetId: string): Promise<void> {
  await page.evaluate(
    ({ draggedId, targetId }) => {
      const source = document.querySelector(`[data-testid="chapter-item-${draggedId}"]`)
      const target = document.querySelector(`[data-testid="chapter-item-${targetId}"]`)
      if (!source || !target) throw new Error('chapter elements not found')
      const dt = new DataTransfer()
      dt.setData('application/x-bilin-chapter', draggedId)
      source.dispatchEvent(new DragEvent('dragstart', { bubbles: true, dataTransfer: dt }))
      target.dispatchEvent(new DragEvent('dragover', { bubbles: true, cancelable: true, dataTransfer: dt }))
      target.dispatchEvent(new DragEvent('drop', { bubbles: true, cancelable: true, dataTransfer: dt }))
    },
    { draggedId, targetId }
  )
}

async function chapterIds(page: Page): Promise<string[]> {
  return page.locator('.chapter-item').evaluateAll((els) =>
    els.map((el) => el.getAttribute('data-testid')?.replace('chapter-item-', '') ?? '')
  )
}

test.describe('P2.1 features', () => {
  let userDataDir: string

  test.beforeEach(() => {
    userDataDir = mkdtempSync(join(tmpdir(), 'bilin-e2e-p21-'))
  })

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

  test('E2E-P21-DRAG-01: drag chapter reorders list and persists', async () => {
    const app1 = await launchApp(userDataDir)
    const page1 = await app1.firstWindow()
    await skipOnboarding(page1)
    await createAndOpenBook(page1)
    await page1.getByRole('button', { name: '+ 新章' }).click()
    await page1.getByRole('button', { name: '+ 新章' }).click()

    const items = page1.locator('.chapter-item')
    await expect(items).toHaveCount(2, { timeout: 10_000 })
    const idsBefore = await chapterIds(page1)
    await dragChapterItem(page1, idsBefore[1], idsBefore[0])

    await expect.poll(async () => (await chapterIds(page1)).join(',')).not.toBe(idsBefore.join(','))

    const idsAfter = await chapterIds(page1)
    await app1.close()

    const app2 = await launchApp(userDataDir)
    const page2 = await app2.firstWindow()
    await page2.getByText('拖拽测试').click()
    await expect(page2.locator('#editor-layout')).toBeVisible({ timeout: 15_000 })
    const titlesRestart = await chapterIds(page2)
    expect(titlesRestart).toEqual(idsAfter)
    await app2.close()
  })

  test('E2E-P21-REP-01: search replace preview and execute updates editor', async () => {
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    page.on('dialog', (dialog) => void dialog.accept())
    await skipOnboarding(page)
    await createAndOpenBook(page)
    await ensureChapterEditor(page)

    const oldWord = '替换专用词OLD'
    const newWord = '替换专用词NEW'
    const editor = page.locator('.ProseMirror')
    await editor.click()
    await editor.pressSequentially(oldWord)
    await page.keyboard.press('Control+S')
    await expect(page.getByText('已保存')).toBeVisible({ timeout: 10_000 })

    await page.evaluate(() => window.dispatchEvent(new Event('bilin:e2e-open-search')))
    await expect(page.getByTestId('search-modal')).toBeVisible({ timeout: 5_000 })
    await page.getByTestId('search-input').fill(oldWord)
    await expect(page.locator('.search-result').first()).toBeVisible({ timeout: 10_000 })

    await page.getByTestId('search-replace-panel').locator('summary').click()
    await page.getByTestId('search-replace-input').fill(newWord)
    await page.getByTestId('search-replace-preview').click()
    await expect(page.getByTestId('search-replace-previews')).toBeVisible({ timeout: 10_000 })

    await page.getByTestId('search-replace-execute').click()
    await expect(page.getByText(/已替换/)).toBeVisible({ timeout: 10_000 })
    await expect(editor).toContainText(newWord, { timeout: 10_000 })
    await expect(editor).not.toContainText(oldWord)
    await app.close()
  })

  test('E2E-P21-INSP-01: capture inspiration shortcut opens modal and saves', async () => {
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await createAndOpenBook(page)
    await ensureChapterEditor(page)

    await page.keyboard.press('Control+Shift+I')
    const modal = page.getByTestId('inspiration-modal')
    if (!(await modal.isVisible().catch(() => false))) {
      await page.evaluate(() => window.dispatchEvent(new Event('bilin:e2e-capture-inspiration')))
    }
    await expect(modal).toBeVisible({ timeout: 5_000 })

    const idea = '灵感捕获测试内容ABC'
    await page.getByTestId('inspiration-content-input').fill(idea)
    await page.getByTestId('inspiration-save-btn').click()
    await expect(page.getByTestId('inspiration-modal')).toBeHidden({ timeout: 10_000 })

    await page.getByTestId('sidebar-tab-inspiration').click()
    await expect(page.getByTestId('inspiration-list')).toBeVisible()
    await expect(page.getByTestId('inspiration-list').getByText(idea)).toBeVisible({ timeout: 10_000 })
    await app.close()
  })
})