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 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 openBookWithContent(page: Page): Promise<void> {
  await page.getByRole('button', { name: /新建书籍/ }).first().click()
  await page.locator('.dialog-content input').first().fill('自动测试书')
  await page.getByRole('button', { name: '创建' }).click()
  await expect(page.locator('#editor-layout')).toBeVisible({ timeout: 15_000 })
  await dismissCockpitIfOpen(page)
  await ensureChapterEditor(page)
  const editor = page.locator('.ProseMirror')
  await editor.click()
  await editor.pressSequentially('林远站在演武场中央，众人目光汇聚。')
  await page.keyboard.press('Control+s')
  await expect(page.getByText('已保存')).toBeVisible({ timeout: 15_000 })
}

async function openAutoPanel(page: Page): Promise<void> {
  await page.getByTestId('panel-tab-ai').click()
  await page.getByTestId('ai-session-new').click()
  await expect(page.getByTestId('ai-mode-tab-auto')).toBeEnabled({ timeout: 10_000 })
  await page.getByTestId('ai-mode-tab-auto').click()
  await expect(page.getByTestId('auto-panel')).toBeVisible({ timeout: 10_000 })
}

async function planAutoScenes(page: Page): Promise<void> {
  await page.getByTestId('auto-goal-input').fill('林远通过入门考核，展现天赋震惊众人')
  const wordInputs = page.locator('.auto-word-range input')
  await wordInputs.nth(0).fill('180')
  await wordInputs.nth(1).fill('220')
  await page.getByTestId('auto-plan-scenes').click()
  await expect(page.getByTestId('auto-start-generate')).toBeVisible({ timeout: 360_000 })
}

async function generateOneAutoScene(page: Page): Promise<void> {
  await page.getByTestId('auto-start-generate').click()
  const naming0 = page.getByTestId('naming-option-0')
  const finishBtn = page.getByTestId('auto-finish-chapter')
  await expect(naming0.or(finishBtn).or(page.getByTestId('auto-start-generate'))).toBeVisible({
    timeout: 240_000
  })
  if (await naming0.isVisible()) {
    await naming0.click()
    await expect(finishBtn.or(page.getByTestId('auto-start-generate'))).toBeVisible({
      timeout: 240_000
    })
  }
}

test.describe('Auto writing', () => {
  test.describe.configure({ retries: 1 })
  let userDataDir: string

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

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

  test('E2E-AUTO-03: auto tab disabled on empty book', async () => {
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await page.getByRole('button', { name: /新建书籍/ }).first().click()
    await page.locator('.dialog-content input').first().fill('空书')
    await page.getByRole('button', { name: '创建' }).click()
    await expect(page.locator('#editor-layout')).toBeVisible({ timeout: 15_000 })
    await dismissCockpitIfOpen(page)
    await page.getByTestId('panel-tab-ai').click()
    await expect(page.getByTestId('ai-mode-tab-auto')).toBeDisabled({ timeout: 10_000 })
    await app.close()
  })

  test('E2E-AUTO-01: auto flow creates chapter', async () => {
    test.setTimeout(600_000)
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await openBookWithContent(page)
    await openAutoPanel(page)
    await planAutoScenes(page)
    await generateOneAutoScene(page)
    await expect(page.getByTestId('auto-finish-chapter')).toBeVisible({ timeout: 30_000 })
    await page.getByTestId('auto-finish-chapter').click()
    await expect(page.locator('.ProseMirror')).not.toBeEmpty({ timeout: 30_000 })
    await app.close()
  })

  test('E2E-AUTO-02: pause and handoff to interactive', async () => {
    test.setTimeout(600_000)
    const app = await launchApp(userDataDir)
    const page = await app.firstWindow()
    await skipOnboarding(page)
    await openBookWithContent(page)
    await openAutoPanel(page)
    await planAutoScenes(page)
    await page.getByTestId('auto-start-generate').click()
    await expect(page.getByTestId('auto-pause')).toBeEnabled({ timeout: 15_000 })
    await page.waitForTimeout(2_000)
    await page.getByTestId('auto-pause').click()
    await expect(page.getByTestId('auto-handoff-interactive')).toBeVisible({ timeout: 10_000 })
    await page.getByTestId('auto-handoff-interactive').click()
    await expect(page.getByTestId('interactive-panel')).toBeVisible({ timeout: 15_000 })
    const acceptBtn = page.getByTestId('interactive-accept-scene')
    const plotA = page.getByTestId('plot-option-A')
    const startBtn = page.getByTestId('interactive-start')
    await expect(acceptBtn.or(plotA).or(startBtn)).toBeVisible({ timeout: 120_000 })
    await app.close()
  })
})