import { expect, test, type Page } from '@playwright/test'
import { expectMessageBoxOverlay, expectModalOverlay } from './overlay'

// Renaming, editing and deleting through the real dialogs of the accepted prototype, against
// a mocked API.
test('rename the book, edit a chapter into a new version and delete both', async ({ page }) => {
  const user = { id: 42, username: 'fictional-editor', role: 'learner' }
  const timestamps = { createdAt: '2026-01-01T00:00:00Z', updatedAt: '2026-01-01T00:00:00Z' }
  const first = { id: 9, bookId: 1, ordinal: 1, title: 'First chapter', status: 'ready', charCount: 24, errorReason: '', errorMessage: '', jobId: 5, ...timestamps }
  const second = { id: 10, bookId: 1, ordinal: 2, title: 'Second chapter', status: 'ready', charCount: 12, errorReason: '', errorMessage: '', jobId: 6, ...timestamps }
  let bookTitle = 'A small step'
  let chapters = [first, second]
  let firstText = 'Mira opened the workshop.\n'
  let processing = false
  const requests: string[] = []

  const listBook = () => ({
    book: { id: 1, title: bookTitle, language: 'en' },
    chapters: chapters.map(item => (item.id === 9 && processing ? { ...item, status: 'processing' } : item)),
  })

  await page.route('**/api/v1/**', async route => {
    const path = new URL(route.request().url()).pathname
    const method = route.request().method()
    requests.push(`${method} ${path}`)
    let data: unknown = null
    let status = 200
    if (path === '/api/v1/login') data = { token: 'fictional-session', user }
    else if (path === '/api/v1/me') data = user
    else if (path === '/api/v1/space') data = { ownerId: user.id, language: 'en' }
    else if (path === '/api/v1/books' && method === 'GET') {
      data = { items: bookTitle === '' ? [] : [{ id: 1, title: bookTitle, language: 'en', chapterCount: chapters.length, pendingCount: 0, processingCount: 0, readyCount: chapters.length, failedCount: 0, ...timestamps }] }
    } else if (path === '/api/v1/books/1' && method === 'PATCH') {
      bookTitle = (route.request().postDataJSON() as { title: string }).title
      data = { book: { id: 1, title: bookTitle, language: 'en' } }
    } else if (path === '/api/v1/books/1' && method === 'DELETE') {
      chapters = []
      bookTitle = ''
      data = { deleted: { bookId: 1, chapters: 2, remaining: 0 } }
    } else if (path === '/api/v1/books/1') data = listBook()
    else if (path === '/api/v1/chapters/9/source') data = { source: { id: 9, bookId: 1, ordinal: 1, title: first.title, text: firstText, status: 'ready', contentSha256: 'sha-a', charCount: [...firstText].length } }
    else if (path === '/api/v1/chapters/9' && method === 'PATCH') {
      const body = route.request().postDataJSON() as { title?: string; text?: string }
      const changed = body.text !== undefined && body.text !== firstText
      if (body.title !== undefined) first.title = body.title
      if (body.author !== undefined) first.author = body.author
      if (changed) {
        firstText = body.text as string
        processing = true
        first.status = 'pending'
        setTimeout(() => { processing = false; first.status = 'ready' }, 400)
      }
      status = 200
      data = { chapter: first, job: changed ? { id: 7, bookId: 1, chapterId: 9, status: 'pending', attempts: 0, errorReason: '', errorMessage: '', ...timestamps } : null, versionChanged: changed }
    } else if (path === '/api/v1/chapters/9' && method === 'DELETE') {
      chapters = chapters.filter(item => item.id !== 9).map((item, index) => ({ ...item, ordinal: index + 1 }))
      data = { deleted: { chapterId: 9, bookId: 1, remaining: chapters.length } }
    }
    await route.fulfill({ status, json: { code: 200, data } })
  })

  await page.goto('/')
  await page.getByLabel('账号').fill(user.username)
  await page.getByLabel('密码', { exact: true }).fill('fictional-password')
  await page.getByRole('button', { name: '登录', exact: true }).click()
  await page.getByRole('link', { name: 'A small step' }).click()
  await expect(page.getByRole('heading', { name: 'A small step' })).toBeVisible()
  // The subtitle no longer claims a system cover: covers are attachments now (#21).
  await expect(page.getByText('语言 英语')).toBeVisible()
  await expect(page.getByTestId('attachments')).toBeVisible()

  // Rename the book through the dialog.
  await page.getByTestId('edit-book').click()
  await expect(page.getByRole('dialog', { name: '编辑书籍' })).toBeVisible()
  await expectModalOverlay(page, page.getByTestId('book-dialog'))
  await expect(page.getByLabel('书名', { exact: true })).toHaveValue('A small step')
  await page.getByLabel('书名', { exact: true }).fill('A long step')
  await page.getByTestId('save-book').click()
  await expect(page.getByTestId('book-notice')).toContainText('书籍信息已更新')
  await expect(page.getByRole('heading', { name: 'A long step' })).toBeVisible()

  // Edit the chapter text: the new version re-processes and later becomes ready again.
  // The chapter editor is the main writing surface, so on a wide window it must use that width and
  // a tall body instead of a fixed 620px box.
  await page.setViewportSize({ width: 1280, height: 900 })
  await page.getByTestId('edit-chapter-9').click()
  await expectModalOverlay(page, page.getByTestId('chapter-dialog'))
  await expect(page.getByLabel('章节标题', { exact: true })).toHaveValue('First chapter')
  await expect(page.getByLabel('正文', { exact: true })).toHaveValue(firstText)
  const dialog = await page.getByTestId('chapter-dialog').boundingBox()
  expect(dialog!.width, 'the chapter editor follows the window').toBeGreaterThan(900)
  const body = await page.getByLabel('正文', { exact: true }).boundingBox()
  expect(body!.height, 'the text area is tall enough to write in').toBeGreaterThan(400)
  const noOverflow = await page.evaluate(() => ({ scroll: document.documentElement.scrollWidth, inner: window.innerWidth }))
  expect(noOverflow.scroll, 'the wide editor must not overflow').toBeLessThanOrEqual(noOverflow.inner)
  await page.setViewportSize({ width: 1280, height: 900 })
  await page.getByLabel('正文', { exact: true }).fill('A replacement body.\n')
  await page.getByTestId('save-chapter').click()
  await expect(page.getByTestId('book-notice')).toContainText('已保存为新版本，正在重新处理')
  // The saved version is queued first and becomes readable again when the worker finishes.
  await expect(page.locator('.chapter-row').first()).toContainText('待处理')
  await expect(page.locator('.chapter-row').first()).toContainText('已就绪', { timeout: 10000 })

  // Deleting a chapter asks first, then reports the remaining count.
  await page.getByTestId('edit-chapter-9').click()
  await page.getByTestId('delete-chapter').click()
  await expect(page.locator('.el-message-box__message').last()).toContainText('本章正文将被删除，已保存词条保留')
  await page.locator('.el-message-box').last().getByRole('button', { name: '取消' }).click()
  expect(requests.filter(entry => entry === 'DELETE /api/v1/chapters/9')).toHaveLength(0)
  await page.getByTestId('delete-chapter').click()
  // A confirmation is a modal overlay too, not text appended to the page.
  await expectMessageBoxOverlay(page)
  await page.locator('.el-message-box').last().getByRole('button', { name: '确认删除章节' }).click()
  await expect(page.getByTestId('book-notice')).toContainText('章节已删除 · 剩余 1 章')
  await expect(page.locator('.chapter-row')).toHaveCount(1)

  // Deleting the book asks first and returns to the library without it.
  await page.getByTestId('delete-book').click()
  await expect(page.locator('.el-message-box__message').last()).toContainText('已保存的生词和短语将保留')
  await page.locator('.el-message-box').last().getByRole('button', { name: '确认删除' }).click()
  await expect(page).toHaveURL(/\?deleted=\d+$/)
  await expect(page.getByRole('heading', { name: '我的书库' })).toBeVisible()
  await expect(page.getByTestId('library-notice')).toContainText('书籍已删除 · 已保存的生词和短语仍保留在生词本')
  await expect(page.getByRole('link', { name: 'A long step' })).toHaveCount(0)
})