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

function previewWav(seconds = 2) {
  const dataSize = 8000 * 2 * seconds;
  const wav = Buffer.alloc(44 + dataSize);
  wav.write('RIFF', 0); wav.writeUInt32LE(36 + dataSize, 4); wav.write('WAVEfmt ', 8);
  wav.writeUInt32LE(16, 16); wav.writeUInt16LE(1, 20); wav.writeUInt16LE(1, 22);
  wav.writeUInt32LE(8000, 24); wav.writeUInt32LE(16000, 28); wav.writeUInt16LE(2, 32); wav.writeUInt16LE(16, 34);
  wav.write('data', 36); wav.writeUInt32LE(dataSize, 40);
  return wav;
}

async function setup(page: Page, scenario: 'queue' | 'template' | 'mine') {
  await page.addInitScript(() => localStorage.setItem('pipu.locale', 'ru'));
  await page.goto('/login');
  await page.getByLabel('Логин', { exact: true }).fill('mobile-admin');
  await page.getByRole('textbox', { name: 'Пароль', exact: true }).fill('mobile-admin-password');
  await page.getByRole('button', { name: 'Войти', exact: true }).click();
  await expect(page.getByRole('button', { name: 'Меню профиля' })).toBeVisible();
  await page.evaluate(async (scenario) => {
    const modulePath = '/src/test/mobileFixtures.ts';
    const { mobileFixtures } = await import(modulePath);
    const source = structuredClone(mobileFixtures['/api/v1/admin/sources'].items[0]);
    const file = { ...structuredClone(mobileFixtures['/api/v1/admin/uploads'].items[0]), batch_has_cover: true };
    const files = [
      { ...file, id: 'visible', original_name: 'visible.flac', target_source_name: source.name, target_rel_path: 'Artist/Album/01 - Song.flac', target_storage_path: 'nas:/music/Artist/Album/01 - Song.flac', stream_url: `/api/v1/admin/uploads/files/${file.id}/stream?exp=9999999999&sig=test` },
      { ...file, id: 'approved', original_name: 'approved.flac', status: 'approved' },
      { ...file, id: 'hidden', original_name: 'hidden.flac', status: 'processing' },
      { ...file, id: 'withdrawn', original_name: 'withdrawn.flac', metadata: null, status: 'withdrawn' },
      { ...file, id: 'rejected', original_name: 'rejected.flac', metadata: null, status: 'rejected' },
    ];
    const missing = { ...file, id: 'missing', original_name: 'missing.flac', target_source_id: null, target_source_name: null, target_rel_path: null, status_reason: 'uploads.no_target' };
    let failOnce = true;
    const deleted: string[] = [];
    const original = window.fetch;
    const json = (data: unknown, status = 200) => new Response(JSON.stringify(data), { status, headers: { 'Content-Type': 'application/json' } });
    window.fetch = async (input, init) => {
      const req = new Request(input, init);
      const url = new URL(req.url);
      if (scenario === 'queue' && url.pathname === '/api/v1/admin/uploads') return json({ items: [files[0], missing], next_cursor: null });
      if (scenario === 'queue' && url.pathname.startsWith('/api/v1/admin/uploads/batches/') && req.method === 'PATCH') {
        const body = await req.json();
        const bytes = Uint8Array.from(atob(body.cover_base64), (char) => char.charCodeAt(0));
        const image = await createImageBitmap(new Blob([bytes], { type: 'image/jpeg' }));
        document.documentElement.dataset.coverDimensions = `${image.width}x${image.height}`;
        document.documentElement.dataset.coverBytes = String(bytes.length);
        image.close();
        return json({ items: [files[0], missing] });
      }
      if (scenario === 'queue' && url.pathname === '/api/v1/admin/uploads/files/missing' && req.method === 'PATCH') {
        const body = await req.json();
        Object.assign(missing, { metadata: body.metadata, target_source_id: source.id, target_source_name: source.name, target_rel_path: 'Artist/Album/02 - Fixed.flac', status_reason: null });
        return json(missing);
      }
      if (scenario === 'template') {
        if (url.pathname === '/api/v1/admin/uploads') {
          const path = document.documentElement.dataset.savedTemplate ? 'Artist/Album/01. Song.flac' : 'Artist/Album/Song.flac';
          return json({ items: [{ ...files[0], target_rel_path: path, target_storage_path: `nas:/music/${path}` }], next_cursor: null });
        }
        if (url.pathname.endsWith('/write-template/suggest')) return json({ template: '{albumartist}/{album}/{track:02}. {title}.{ext}', matched: 180, total: 200, examples: ['Кино/Группа крови/01. Группа крови.flac'] });
        if (url.pathname.endsWith('/write-template/check')) return json({ ok: false, total: 50, round_trip: 0, same_path: 45, mismatches: [] });
        if (url.pathname === `/api/v1/admin/sources/${source.id}` && req.method === 'PATCH') {
          const body = await req.json();
          document.documentElement.dataset.savedTemplate = body.write_template;
          Object.assign(source, body);
          return json(source);
        }
        if (url.pathname === `/api/v1/admin/sources/${source.id}`) return json(source);
      }
      if (scenario === 'mine' && url.pathname === '/api/v1/uploads/mine') {
        if (url.searchParams.getAll('status').length > 1) return json({ code: 'common.bad_request', status: 400 }, 400);
        if (url.searchParams.has('batch')) {
          document.documentElement.dataset.batchPages = String(Number(document.documentElement.dataset.batchPages ?? 0) + 1);
          return json({ items: [url.searchParams.has('cursor') ? files[2] : files[0]], next_cursor: url.searchParams.has('cursor') ? null : 'next' });
        }
        const statuses = url.searchParams.get('status')?.split(',') ?? [];
        const visible = [files[0], files[1], files[3], files[4]].filter((f) => !statuses.length || statuses.includes(f.status));
        return json({ items: visible, next_cursor: 'more' });
      }
      if (scenario === 'mine' && req.method === 'DELETE' && url.pathname.startsWith('/api/v1/uploads/files/')) {
        const id = url.pathname.split('/').pop()!;
        deleted.push(id);
        document.documentElement.dataset.deleted = JSON.stringify(deleted);
        if (id === 'hidden' && failOnce) { failOnce = false; return json({ code: 'uploads.wrong_status', status: 409 }, 409); }
        files.find((f) => f.id === id)!.status = 'withdrawn';
        return new Response(null, { status: 204 });
      }
      return original(input, init);
    };
    const target = scenario === 'queue' ? '/admin/uploads' : scenario === 'mine' ? '/uploads/mine' : `/admin/sources/${source.id}/patterns`;
    history.pushState({}, '', target);
    window.dispatchEvent(new PopStateEvent('popstate'));
  }, scenario);
}

test('queue shows the storage and path, and recalculates after fixing placement', async ({ page }, info) => {
  await setup(page, 'queue');
  await expect(page.getByText('Есть обложка', { exact: true })).toBeVisible();
  await expect(page.getByText('Artist/Album/01 - Song.flac', { exact: true })).toBeHidden();
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).click();
  await expect(page.getByText('Artist/Album/01 - Song.flac', { exact: true })).toBeVisible();
  await expect(page.getByText('Artist/Album/01 - Song.flac', { exact: true })).toHaveAttribute('title', 'nas:/music/Artist/Album/01 - Song.flac');
  await expect(page.getByText('Хранилище не выбрано', { exact: true })).toBeVisible();
  await page.getByRole('checkbox', { name: 'Выбрать всю пачку', exact: true }).check();
  await page.getByRole('button', { name: 'Свернуть пачку', exact: true }).click();
  await expect(page.getByText('Artist/Album/01 - Song.flac', { exact: true })).toBeHidden();
  await expect(page.getByRole('button', { name: 'Развернуть пачку', exact: true })).toHaveAttribute('aria-expanded', 'false');
  await expect(page.getByRole('checkbox', { name: 'Выбрать всю пачку', exact: true })).toBeChecked();
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).press('Enter');
  await expect(page.getByText('Artist/Album/01 - Song.flac', { exact: true })).toBeVisible();
  await page.getByRole('checkbox', { name: 'Выбрать всю пачку', exact: true }).uncheck();
  await page.getByRole('button', { name: 'Выбрать хранилище', exact: true }).click();
  const dialog = page.getByRole('dialog');
  await dialog.getByLabel('Исполнитель', { exact: true }).fill('Artist');
  await dialog.getByLabel('Название', { exact: true }).fill('Fixed');
  await dialog.getByRole('combobox').selectOption({ label: 'Музыкальное хранилище' });
  await dialog.getByRole('button', { name: 'Сохранить', exact: true }).click();
  await expect(page.getByText('Artist/Album/02 - Fixed.flac', { exact: true })).toBeVisible();
  await page.screenshot({ path: info.outputPath('queue-placement.png'), fullPage: true });
  await page.setViewportSize({ width: 390, height: 844 });
  await expect(page.getByText('Artist/Album/02 - Fixed.flac', { exact: true })).toBeVisible();
  await expect.poll(() => page.evaluate(() => document.documentElement.scrollWidth - innerWidth)).toBeLessThanOrEqual(1);
});

test('automatically suggests a dominant template and saves a custom edit only on request', async ({ page }, info) => {
  await setup(page, 'template');
  const field = page.getByRole('textbox', { name: 'Шаблон пути', exact: true });
  await expect(field).toHaveValue('{albumartist}/{album}/{track:02}. {title}.{ext}');
  await expect(page.getByText(/180 из 200/)).toBeVisible();
  await expect(page.getByText('Кино/Группа крови/01. Группа крови.flac', { exact: true })).toBeVisible();
  await expect(page.locator('html')).not.toHaveAttribute('data-saved-template');
  await field.fill('{albumartist}/[{year} - ]{album}/{track:02} - {title}.{ext}');
  const section = page.getByRole('heading', { name: 'Приём загрузок и шаблон пути' }).locator('..');
  await section.getByRole('checkbox').check();
  await section.getByRole('button', { name: 'Сохранить', exact: true }).click();
  await expect(page.locator('html')).toHaveAttribute('data-saved-template', '{albumartist}/[{year} - ]{album}/{track:02} - {title}.{ext}');
  await page.screenshot({ path: info.outputPath('auto-template.png'), fullPage: true });
});

test('selects a whole own batch across pages and reports partial withdrawal failures', async ({ page }, info) => {
  await setup(page, 'mine');
  await page.getByRole('checkbox', { name: 'Выбрать всю пачку', exact: true }).check();
  await expect(page.locator('html')).toHaveAttribute('data-batch-pages', '2');
  await expect(page.getByText(/Выбрано 2 файла/)).toBeVisible();
  await page.getByRole('button', { name: 'Отозвать выбранные', exact: true }).click();
  await expect(page.getByText(/Не удалось отозвать: 1/)).toBeVisible();
  await expect(page.locator('html')).toHaveAttribute('data-deleted', '["visible","hidden"]');
  await page.setViewportSize({ width: 390, height: 844 });
  await expect.poll(() => page.evaluate(() => Math.max(document.documentElement.scrollWidth - innerWidth, document.querySelector('main')!.scrollWidth - document.querySelector('main')!.clientWidth))).toBeLessThanOrEqual(1);
  await page.screenshot({ path: info.outputPath('bulk-withdraw-mobile.png'), fullPage: true });
  await page.getByRole('button', { name: 'Отозвать выбранные', exact: true }).click();
  await expect(page.locator('html')).toHaveAttribute('data-deleted', '["visible","hidden","hidden"]');
  await expect(page.getByRole('region', { name: 'Массовый отзыв предложений' })).toHaveCount(0);
});

test('keeps withdrawn proposals in their own filter', async ({ page }) => {
  await setup(page, 'mine');
  await expect(page.getByText('visible.flac', { exact: true })).toBeVisible();
  await expect(page.getByText('withdrawn.flac', { exact: true })).toHaveCount(0);
  await page.getByRole('button', { name: 'Отозванные', exact: true }).click();
  await expect(page.getByText('withdrawn.flac', { exact: true }).first()).toBeVisible();
  await expect(page.getByText('visible.flac', { exact: true })).toHaveCount(0);
  await page.getByRole('button', { name: 'Не приняты', exact: true }).click();
  await expect(page.getByText('rejected.flac', { exact: true }).first()).toBeVisible();
  await expect(page.getByText('withdrawn.flac', { exact: true })).toHaveCount(0);
  await page.getByRole('button', { name: 'Все', exact: true }).click();
  await expect(page.getByText('visible.flac', { exact: true })).toBeVisible();
  await expect(page.getByText('withdrawn.flac', { exact: true })).toHaveCount(0);
});

test('queue shows the current full destination after saving a changed source template', async ({ page }) => {
  await setup(page, 'template');
  const sourcePath = new URL(page.url()).pathname;
  const navigate = async (path: string) => page.evaluate((path) => {
    history.pushState({}, '', path);
    window.dispatchEvent(new PopStateEvent('popstate'));
  }, path);
  await navigate('/admin/uploads');
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).click();
  await expect(page.getByText('Artist/Album/Song.flac', { exact: true })).toHaveAttribute('title', 'nas:/music/Artist/Album/Song.flac');
  await navigate(sourcePath);
  await page.getByRole('textbox', { name: 'Шаблон пути', exact: true }).fill('{albumartist}/{album}/{track:02}. {title}.{ext}');
  const section = page.getByRole('heading', { name: 'Приём загрузок и шаблон пути' }).locator('..');
  await section.getByRole('checkbox').check();
  await section.getByRole('button', { name: 'Сохранить', exact: true }).click();
  await expect(page.locator('html')).toHaveAttribute('data-saved-template', '{albumartist}/{album}/{track:02}. {title}.{ext}');
  await navigate('/admin/uploads');
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).click();
  await expect(page.getByText('Artist/Album/01. Song.flac', { exact: true })).toHaveAttribute('title', 'nas:/music/Artist/Album/01. Song.flac');
  await expect(page.getByText('Artist/Album/Song.flac', { exact: true })).toHaveCount(0);
});

test('queue preview only requests audio after play', async ({ page }) => {
  const wav = previewWav();
  let requested = 0;
  let otherRequested = 0;
  await page.route('**/api/v1/admin/uploads/files/*/stream?*', (route) => {
    requested++;
    return route.fulfill({ contentType: 'audio/wav', body: wav });
  });
  await page.route('**/api/v1/stream/mobile-preview', (route) => {
    otherRequested++;
    return route.fulfill({ contentType: 'audio/wav', body: wav });
  });
  await setup(page, 'queue');
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).click();
  const audio = page.locator('audio').first();
  await expect(audio).toHaveAttribute('preload', 'none');
  await page.getByRole('button', { name: 'Свернуть пачку', exact: true }).click();
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).click();
  expect(requested).toBe(0);
  expect(otherRequested).toBe(0);
  await audio.evaluate((el: HTMLAudioElement) => el.play());
  await expect.poll(() => audio.evaluate((el: HTMLAudioElement) => el.duration)).toBe(2);
  await expect.poll(() => audio.evaluate((el: HTMLAudioElement) => el.currentTime)).toBeGreaterThan(0);
  expect(requested).toBeGreaterThan(0);
  expect(otherRequested).toBe(0);
  expect(await audio.evaluate((el: HTMLAudioElement) => el.error)).toBeNull();
});

test('queue preview explains HTTP failures and recovers on retry', async ({ page }) => {
  let available = false;
  // The E2E bridge mocks window.fetch; media diagnostics must reach the same
  // intercepted HTTP route as the native audio element.
  await page.addInitScript(() => Object.assign(window, { previewNativeFetch: window.fetch.bind(window) }));
  await page.route('**/api/v1/admin/uploads/files/*/stream?*', (route) => available
    ? route.fulfill({ contentType: 'audio/wav', body: previewWav() })
    : route.fulfill({ status: 403, contentType: 'text/plain', body: 'Forbidden' }));
  await setup(page, 'queue');
  await page.evaluate(() => {
    const original = window.fetch;
    const native = (window as unknown as { previewNativeFetch: typeof fetch }).previewNativeFetch;
    window.fetch = (input, init) => new URL(new Request(input, init).url).pathname.endsWith('/stream')
      ? native(input, init) : original(input, init);
  });
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).click();
  const preview = page.locator('audio').first().locator('..');
  await preview.locator('audio').evaluate((el: HTMLAudioElement) => el.play().catch(() => undefined));
  await expect(preview.getByRole('alert')).toHaveText('Не удалось загрузить аудио: HTTP 403.');
  available = true;
  await preview.getByRole('button', { name: 'Повторить', exact: true }).click();
  await expect.poll(() => preview.locator('audio').evaluate((el: HTMLAudioElement) => el.duration)).toBe(2);
  await expect(preview.getByRole('alert')).toHaveCount(0);
});

test('starting another queue preview pauses the previous track', async ({ page }) => {
  const wav = previewWav(10);
  await page.route('**/api/v1/admin/uploads/files/*/stream?*', (route) => route.fulfill({ contentType: 'audio/wav', body: wav }));
  await page.route('**/api/v1/stream/mobile-preview', (route) => route.fulfill({ contentType: 'audio/wav', body: wav }));
  await setup(page, 'queue');
  await page.getByRole('button', { name: 'Развернуть пачку', exact: true }).click();
  const first = page.locator('audio').nth(0);
  const second = page.locator('audio').nth(1);
  await first.evaluate((el: HTMLAudioElement) => el.play());
  await expect.poll(() => first.evaluate((el: HTMLAudioElement) => el.currentTime)).toBeGreaterThan(0);
  await second.evaluate((el: HTMLAudioElement) => el.play());
  await expect.poll(() => first.evaluate((el: HTMLAudioElement) => el.paused)).toBe(true);
  expect(await second.evaluate((el: HTMLAudioElement) => el.paused)).toBe(false);
  expect(await first.evaluate((el: HTMLAudioElement) => el.currentTime)).toBeGreaterThan(0);
  await first.evaluate((el: HTMLAudioElement) => el.play());
  await expect.poll(() => second.evaluate((el: HTMLAudioElement) => el.paused)).toBe(true);
  expect(await first.evaluate((el: HTMLAudioElement) => el.paused)).toBe(false);
  await page.getByRole('button', { name: 'Свернуть пачку', exact: true }).click();
  await expect.poll(() => first.evaluate((el: HTMLAudioElement) => el.paused)).toBe(true);
});

test('oversized album cover is reduced before saving the batch', async ({ page }) => {
  await setup(page, 'queue');
  const png = await page.evaluate(() => {
    const canvas = document.createElement('canvas');
    canvas.width = 3000; canvas.height = 1800;
    canvas.getContext('2d')!.fillRect(0, 0, canvas.width, canvas.height);
    return canvas.toDataURL('image/png').split(',')[1]!;
  });
  // A valid image with trailing padding reproduces an oversized input without a large fixture in Git.
  const largeCover = Buffer.concat([Buffer.from(png, 'base64'), Buffer.alloc(12 * 1024 * 1024)]);
  await page.getByRole('button', { name: 'На всю пачку', exact: true }).click();
  const dialog = page.getByRole('dialog');
  await dialog.locator('input[type=file]').setInputFiles({ name: 'Cover.png', mimeType: 'image/png', buffer: largeCover });
  await dialog.getByRole('button', { name: 'Сохранить', exact: true }).click();
  await expect(page.locator('html')).toHaveAttribute('data-cover-dimensions', '2048x1229');
  expect(Number(await page.locator('html').getAttribute('data-cover-bytes'))).toBeLessThan(8 * 1024 * 1024);
});