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

const TEST_SOURCE = 'Test News';

test.describe('Home page', () => {
  test('loads and shows sources', async ({ page }) => {
    await page.goto('/');
    await expect(page).toHaveTitle('NewsArchiver');
    await expect(page.locator('h1').filter({ hasText: 'News Archives' })).toBeVisible();
    await expect(page.locator('.newspaper-list')).toBeVisible();
  });

  test('shows source count', async ({ page }) => {
    await page.goto('/');
    const count = await page.locator('p:has-text("Total sources:")').textContent();
    expect(count || '').toMatch(/Total sources: \d+/);
  });

  test('navigates to a source', async ({ page }) => {
    await page.goto('/');
    const firstLink = page.locator('.newspaper-item h2 a').first();
    const sourceName = (await firstLink.textContent())?.trim() || '';
    await firstLink.click();
    await expect(page).toHaveURL(/\/source\//);
    await expect(page.locator('h1')).toContainText(sourceName);
  });
});

test.describe('Article listing', () => {
  test('shows articles for a source', async ({ page }) => {
    await page.goto(`/source/${TEST_SOURCE.toLowerCase()}`);
    await expect(page.locator('.article-list')).toBeVisible();
    const articles = page.locator('.article-item');
    await expect.poll(() => articles.count()).toBeGreaterThan(0);
  });

  test('article links navigate to detail', async ({ page }) => {
    await page.goto(`/source/${TEST_SOURCE.toLowerCase()}`);
    const firstArticle = page.locator('.article-item h3 a').first();
    const title = (await firstArticle.textContent())?.trim() || '';
    await firstArticle.click();
    await expect(page).toHaveURL(/\/article\/\d+/);
    await expect(page.locator('.article-view h1')).toContainText(title);
  });

  test('shows article metadata', async ({ page }) => {
    await page.goto(`/source/${TEST_SOURCE.toLowerCase()}/article/1`);
    await expect(page.locator('.article-source')).toBeVisible();
    await expect(page.locator('.article-meta')).toBeVisible();
  });

  test('back link returns to listing', async ({ page }) => {
    await page.goto(`/source/${TEST_SOURCE.toLowerCase()}/article/1`);
    await page.locator('.back-link').click();
    await expect(page).toHaveURL(new RegExp(`/source/${TEST_SOURCE.toLowerCase()}`));
    await expect(page.locator('.article-list')).toBeVisible();
  });
});

test.describe('Pagination', () => {
  test('shows page info', async ({ page }) => {
    await page.goto(`/source/${TEST_SOURCE.toLowerCase()}`);
    await expect(page.locator('.pagination span')).toContainText('Page 1');
  });
});

test.describe('Navigation', () => {
  test('header nav links work', async ({ page }) => {
    await page.goto('/');
    await page.locator('nav a:has-text("Archives")').click();
    await expect(page).toHaveURL(/\/$/);

    await page.locator('nav a:has-text("Status")').click();
    await expect(page).toHaveURL(/\/status/);
  });
});

test.describe('Status page', () => {
  test('shows system status', async ({ page }) => {
    await page.goto('/status');
    await expect(page.locator('h1')).toBeVisible();
  });

  test('shows total articles count', async ({ page }) => {
    await page.goto('/status');
    await expect(page.locator('text=/Total Articles: \d+/')).toBeVisible();
  });
});

test.describe('RSS feed', () => {
  test('serves RSS XML', async ({ request }) => {
    const resp = await request.get('/rss');
    expect(resp.ok()).toBeTruthy();
    expect(resp.headers()['content-type']).toContain('application/rss+xml');
    const body = await resp.text();
    expect(body).toContain('<rss');
    expect(body).toContain('<channel>');
  });
});

test.describe('Atom feed', () => {
  test('serves Atom XML', async ({ request }) => {
    const resp = await request.get('/atom');
    expect(resp.ok()).toBeTruthy();
    expect(resp.headers()['content-type']).toContain('application/atom+xml');
    const body = await resp.text();
    expect(body).toContain('<feed');
  });
});

test.describe('Theme toggle', () => {
  test('toggles dark mode', async ({ page }) => {
    await page.goto('/');
    const html = page.locator('html');
    await page.locator('#theme-toggle').click();
    await expect(html).toHaveAttribute('data-theme', 'dark');

    await page.locator('#theme-toggle').click();
    await expect(html).toHaveAttribute('data-theme', 'light');
  });

  test('persists theme in localStorage', async ({ page }) => {
    await page.goto('/');
    await page.locator('#theme-toggle').click();
    const theme = await page.evaluate(() => localStorage.getItem('theme'));
    expect(theme).toBe('dark');
  });
});