import { expect, test, type Page } from '@playwright/test'

// Completing a chapter and reading the progress page, against a mocked API.
test('marking a chapter read shows up in the book and on the progress page once', async ({ page }) => {
  const user = { id: 42, username: 'fictional-progress', role: 'learner' }
  const chapter = {
    id: 3, bookId: 7, ordinal: 1, title: 'Fictional chapter', status: 'ready', charCount: 31,
    errorReason: '', errorMessage: '', jobId: 9, readAt: null as string | null, createdAt: '', updatedAt: '',
  }
  let completions = 0

  await page.route('**/api/v1/**', async route => {
    const url = new URL(route.request().url())
    const path = url.pathname
    const method = route.request().method()
    let data: unknown = null
    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') data = { items: [{ id: 7, title: 'Fictional reader', language: 'en', chapterCount: 1, pendingCount: 0, processingCount: 0, readyCount: 1, failedCount: 0, createdAt: '', updatedAt: '' }] }
    else if (path === '/api/v1/books/7') data = { book: { id: 7, title: 'Fictional reader', language: 'en' }, chapters: [chapter] }
    else if (path === '/api/v1/chapters/3/tokens') data = { tokens: [{ start: 0, end: 9, text: 'Curiosity', kind: 'word' }] }
    else if (path === '/api/v1/chapters/3' && method === 'GET') {
      data = { book: { id: 7, title: 'Fictional reader', language: 'en' }, chapter: { ...chapter, contentSha256: 'sha', originalText: 'Curiosity opens the first door.\n' }, navigation: { previousChapterId: null, nextChapterId: null } }
    } else if (path === '/api/v1/chapters/3/complete') {
      completions += 1
      const readAt = '2026-09-15T03:04:05Z'
      chapter.readAt = readAt
      data = { progress: { chapterId: 3, bookId: 7, read: true, readAt, duplicate: completions > 1 } }
    } else if (path === '/api/v1/progress') {
      data = {
        readChapters: chapter.readAt ? 1 : 0, totalChapters: 1,
        knownTerms: 2, learningTerms: 1, newTerms: 3, ignoredTerms: 1, savedTerms: 7,
        dueNow: chapter.readAt ? 1 : 4,
        books: [{ id: 7, title: 'Fictional reader', readChapters: chapter.readAt ? 1 : 0, totalChapters: 1 }],
      }
    } else if (path === '/api/v1/reviews/queue') data = { items: [], total: 0 }
    await route.fulfill({ 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 expect(page.getByRole('heading', { name: '我的书库' })).toBeVisible()

  // The reader offers the explicit completion action and says what it does and does not do.
  await page.goto('/chapters/3')
  await expect(page.getByRole('heading', { name: 'Fictional chapter' })).toBeVisible()
  await expect(page.getByTestId('mark-read')).toHaveText('标记本章已读')
  await expect(page.locator('.chapter-complete')).toContainText('只记录已读，不改变词语状态')
  await page.screenshot({ path: '../.local/evidence/issue13-reader-unread.png' })

  // Completing shows the reading time, and repeating is answered without counting twice.
  await page.getByTestId('mark-read').click()
  await expect(page.getByTestId('chapter-read-state')).toContainText('本章已读')
  await expect(page.getByTestId('complete-notice')).toContainText('已记为读完本章')
  await page.screenshot({ path: '../.local/evidence/issue13-reader-read.png' })
  await page.getByTestId('mark-read').click()
  await expect(page.getByTestId('complete-notice')).toContainText('没有重复计数')

  // The book list shows which chapters are read.
  await page.goto('/books/7')
  await expect(page.getByTestId('chapter-read-chip').first()).toHaveText('已读')

  // The progress page reports the reading total and keeps the four word statuses apart.
  await page.getByRole('link', { name: '进度' }).click()
  await expect(page).toHaveURL(/\/progress/)
  await expect(page.getByTestId('stat-read')).toContainText('1 / 1')
  await expect(page.getByTestId('stat-known')).toContainText('2')
  await expect(page.getByTestId('stat-ignored')).toContainText('1')
  await expect(page.getByTestId('stat-due')).toContainText('1')
  await expect(page.getByTestId('progress-books')).toContainText('Fictional reader')
  await page.screenshot({ path: '../.local/evidence/issue13-progress.png' })

  // Reloading keeps the same numbers: they come from the server, not from the page.
  await page.reload()
  await expect(page.getByTestId('stat-read')).toContainText('1 / 1')
  expect(completions).toBe(2)
})

test('a fresh space explains the empty progress instead of showing zeros alone', async ({ page }) => {
  const user = { id: 42, username: 'fictional-progress', role: 'learner' }
  await page.route('**/api/v1/**', async route => {
    const path = new URL(route.request().url()).pathname
    let data: unknown = null
    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') data = { items: [] }
    else if (path === '/api/v1/progress') {
      data = { readChapters: 0, totalChapters: 0, knownTerms: 0, learningTerms: 0, newTerms: 0, ignoredTerms: 0, savedTerms: 0, dueNow: 0, books: [] }
    }
    await route.fulfill({ 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.goto('/progress')
  await expect(page.getByTestId('stat-read')).toContainText('0 / 0')
  await expect(page.getByTestId('progress-no-books')).toContainText('还没有书')
  await expect(page.getByTestId('stat-ignored')).toContainText('0')
})