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

/**
 * E2E for the Phase 9c parent-side: ParentManager on /schulkalender (teacher
 * UI) and the /eltern login + timetable view. Backend calls are intercepted
 * so the suite doesn't need a real teacher → parent invitation cycle.
 */

async function mockTeacherCalendar(page: Page, opts: { classes?: unknown[]; parents?: unknown[]; invite?: unknown } = {}) {
  // Existing schulkalender mocks the page already needs.
  await page.route('**/api/school/calendar/config', async (route) => {
    return route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify({ user_id: 'dev', bundesland: 'DE-NI' }) })
  })
  await page.route(/\/api\/school\/calendar\/holidays(\?.*)?$/, async (route) =>
    route.fulfill({ status: 200, contentType: 'application/json', body: '[]' }))
  await page.route(/\/api\/school\/calendar\/events(\?.*)?$/, async (route) =>
    route.fulfill({ status: 200, contentType: 'application/json', body: '[]' }))

  // ParentManager loads classes via the stundenplan API.
  await page.route('**/api/school/timetable/classes', async (route) =>
    route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify(opts.classes ?? []) }))

  await page.route('**/api/school/calendar/parents', async (route) =>
    route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify(opts.parents ?? []) }))

  await page.route('**/api/school/calendar/parents/invite', async (route) => {
    if (route.request().method() !== 'POST') return route.fulfill({ status: 405 })
    return route.fulfill({
      status: 201, contentType: 'application/json',
      body: JSON.stringify(opts.invite ?? {
        parent: { id: 'p1', email: 'mama@example.de', preferred_language: 'tr' },
        child:  { id: 'c1', parent_id: 'p1', tt_class_id: 'class-1', first_name: 'Max', last_name: 'Mueller' },
        magic_token: 'abc123',
        magic_url: '/eltern/login?token=abc123',
        expires_at: new Date(Date.now() + 7 * 24 * 3600 * 1000).toISOString(),
      }),
    })
  })
}

test.describe('Schulkalender — ParentManager', () => {
  test('renders empty state when no parents invited', async ({ page }) => {
    await mockTeacherCalendar(page, { classes: [{ id: 'class-1', name: '5a', grade_level: 5, student_count: 24, created_by_user_id: 'u', created_at: '' }] })
    await page.goto('/schulkalender')
    await page.waitForLoadState('networkidle')
    const manager = page.getByTestId('parent-manager')
    await expect(manager).toBeVisible()
    await expect(manager.getByText('Keine eingeladenen Eltern.')).toBeVisible()
  })

  test('+ Eltern einladen opens the form when classes exist', async ({ page }) => {
    await mockTeacherCalendar(page, { classes: [{ id: 'class-1', name: '5a', grade_level: 5, student_count: 24, created_by_user_id: 'u', created_at: '' }] })
    await page.goto('/schulkalender')
    await page.waitForLoadState('networkidle')
    await page.getByTestId('parent-invite-toggle').click()
    await expect(page.getByTestId('parent-email')).toBeVisible()
  })

  test('submitting invite shows the magic link to copy', async ({ page }) => {
    await mockTeacherCalendar(page, { classes: [{ id: 'class-1', name: '5a', grade_level: 5, student_count: 24, created_by_user_id: 'u', created_at: '' }] })
    await page.goto('/schulkalender')
    await page.waitForLoadState('networkidle')
    await page.getByTestId('parent-invite-toggle').click()
    await page.getByTestId('parent-email').fill('mama@example.de')
    await page.getByTestId('parent-child-first').fill('Max')
    await page.getByTestId('parent-child-last').fill('Mueller')
    await page.getByTestId('parent-class').selectOption('class-1')
    await page.getByTestId('parent-invite-submit').click()
    await expect(page.getByTestId('parent-invite-link')).toBeVisible()
    await expect(page.getByText('Einladungs-Link fuer mama@example.de')).toBeVisible()
  })
})

async function mockParentApi(page: Page, opts: { redeemOk?: boolean; me?: unknown; lessons?: unknown[] } = {}) {
  const redeemOk = opts.redeemOk ?? true
  await page.route('**/api/parent/auth/redeem', async (route) => {
    if (!redeemOk) return route.fulfill({ status: 401, contentType: 'application/json', body: '{"error":"invalid"}' })
    return route.fulfill({
      status: 200, contentType: 'application/json',
      headers: { 'set-cookie': 'bp_parent_session=test; Path=/; HttpOnly' },
      body: JSON.stringify({ id: 'p1', email: 'mama@example.de', preferred_language: 'tr' }),
    })
  })
  await page.route('**/api/parent/me', async (route) => {
    return route.fulfill({
      status: 200, contentType: 'application/json',
      body: JSON.stringify(opts.me ?? {
        parent: { id: 'p1', email: 'mama@example.de', preferred_language: 'tr' },
        children: [{ id: 'c1', parent_id: 'p1', tt_class_id: 'class-1', first_name: 'Max', last_name: 'Mueller', class_name: '5a' }],
      }),
    })
  })
  await page.route(/\/api\/parent\/me\/timetable(\?.*)?$/, async (route) =>
    route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify(opts.lessons ?? []) }))
  await page.route('**/api/parent/auth/logout', async (route) =>
    route.fulfill({ status: 200, contentType: 'application/json', body: '{"message":"ok"}' }))
}

test.describe('Eltern — Login + Wochengrid', () => {
  test('login page shows error when no token in URL', async ({ page }) => {
    await mockParentApi(page)
    await page.goto('/eltern/login')
    await expect(page.getByTestId('eltern-login')).toBeVisible()
    await expect(page.getByText('Kein Token in der URL')).toBeVisible()
  })

  test('valid token redirects to the parent overview', async ({ page }) => {
    await mockParentApi(page, {})
    await page.goto('/eltern/login?token=abc123')
    await page.waitForURL('**/eltern', { timeout: 3000 })
    await expect(page.getByTestId('eltern-page')).toBeVisible()
  })

  test('shows greeting and child class on /eltern', async ({ page }) => {
    await mockParentApi(page)
    await page.goto('/eltern/login?token=abc123')
    await page.waitForURL('**/eltern')
    // Turkish greeting because preferred_language=tr.
    await expect(page.getByText('Hoş geldiniz, mama@example.de')).toBeVisible()
    await expect(page.getByText('Max Mueller · 5a')).toBeVisible()
  })

  test('translates subject names into the parent language', async ({ page }) => {
    await mockParentApi(page, {
      lessons: [
        { DayOfWeek: 1, PeriodIndex: 1, StartTime: '08:00', EndTime: '08:45', ClassName: '5a', SubjectName: 'Mathematik', SubjectCode: 'M', TeacherName: 'Schmidt, Anna', RoomName: 'A101', Pinned: false },
      ],
    })
    await page.goto('/eltern/login?token=abc123')
    await page.waitForURL('**/eltern')
    // Turkish target = Matematik.
    await expect(page.getByTestId('eltern-cell-1-1').getByText('Matematik')).toBeVisible()
  })
})