import { mkdtemp, rm } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { AddressInfo } from 'node:net';
import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import { CatalogDatabase } from '../src/database/store.js';
import { createWebApp } from '../src/web/app.js';

let dir = '';

beforeEach(async () => {
  dir = await mkdtemp(join(tmpdir(), 'nlc-web-'));
});

afterEach(async () => {
  await rm(dir, { force: true, recursive: true });
});

async function withServer(path: string, pathname: string): Promise<string> {
  const app = createWebApp(path);
  const server = app.listen(0);
  try {
    const { port } = server.address() as AddressInfo;
    const response = await fetch(`http://127.0.0.1:${port}${pathname}`);
    return response.text();
  } finally {
    server.close();
  }
}

function fixtureDatabase(): string {
  const path = join(dir, 'catalog.sqlite');
  const db = new CatalogDatabase(path);
  db.saveCatalogRun({
    mode: 'test',
    newslettersProcessed: 2,
    linksExtracted: 3,
    sponsorCount: 1,
    deadLinkCount: 1,
    errors: 0,
    rows: [
      {
        'Issue Date': '2026-05-10',
        Category: 'SQLite',
        'Link URL': 'https://sqlite.example/old',
        Title: 'Older SQLite Post',
        Description: 'An older database post',
        'Page Title + Meta': '',
        'Source Newsletter': 'DB Weekly',
        'Also In': ''
      },
      {
        'Issue Date': '2026-05-17',
        Category: 'SQLite',
        'Link URL': 'https://sqlite.example',
        Title: 'SQLite Post',
        Description: 'A local database post',
        'Page Title + Meta': '',
        'Source Newsletter': 'DB Weekly',
        'Also In': ''
      },
      {
        'Issue Date': '2026-05-16',
        Category: 'JavaScript',
        'Link URL': 'https://js.example',
        Title: 'JS Post',
        Description: 'A JavaScript post',
        'Page Title + Meta': '',
        'Source Newsletter': 'JS Weekly',
        'Also In': ''
      }
    ],
    sponsors: [
      {
        Newsletter: 'DB Weekly',
        Sponsor: 'Acme',
        Link: 'https://sponsor.example',
        Description: 'Blurb'
      }
    ],
    deadLinks: [
      { URL: 'https://dead.example', Status: '404', Source: 'DB Weekly', Date: '2026-05-17' }
    ]
  });
  db.close();
  return path;
}

describe('web app', () => {
  it('provides newsletter summaries and latest/all issue link scopes', () => {
    const path = fixtureDatabase();
    const db = new CatalogDatabase(path);
    try {
      const summaries = db.newsletterSummaries();
      expect(
        summaries.map(({ name, latestIssueDate, issueCount, linkCount, sponsorCount }) => ({
          name,
          latestIssueDate,
          issueCount,
          linkCount,
          sponsorCount
        }))
      ).toEqual([
        {
          name: 'DB Weekly',
          latestIssueDate: '2026-05-17',
          issueCount: 2,
          linkCount: 2,
          sponsorCount: 1
        },
        {
          name: 'JS Weekly',
          latestIssueDate: '2026-05-16',
          issueCount: 1,
          linkCount: 1,
          sponsorCount: 0
        }
      ]);

      const dbWeekly = summaries.find((newsletter) => newsletter.name === 'DB Weekly');
      expect(
        db.newsletterLinks(dbWeekly?.id ?? 0, { scope: 'latest' }).map((link) => link.title)
      ).toEqual(['SQLite Post']);
      expect(
        db.newsletterLinks(dbWeekly?.id ?? 0, { scope: 'all' }).map((link) => link.title)
      ).toEqual(['SQLite Post', 'Older SQLite Post']);
    } finally {
      db.close();
    }
  });

  it('renders dashboard and catalog pages from SQLite', async () => {
    const path = fixtureDatabase();

    await expect(withServer(path, '/')).resolves.toContain('Newsletter Link Catalog');
    await expect(withServer(path, '/links')).resolves.toContain('SQLite Post');
    await expect(withServer(path, '/links?q=JavaScript')).resolves.toContain('JS Post');
    await expect(withServer(path, '/links?q=JavaScript')).resolves.not.toContain('SQLite Post');
    await expect(withServer(path, '/sponsors')).resolves.toContain('Acme');
    await expect(withServer(path, '/dead-links')).resolves.toContain('https://dead.example');
    await expect(withServer(path, '/runs')).resolves.toContain('test');
  });

  it('renders the two-pane newsletter browser with latest issue by default and all issue mode', async () => {
    const path = fixtureDatabase();

    const latest = await withServer(path, '/newsletters');
    expect(latest).toContain('class="app-shell"');
    expect(latest).toContain('Search newsletters');
    expect(latest).toContain('aria-current="true"');
    expect(latest).toContain('Latest Issue');
    expect(latest).toContain('All Issues');
    expect(latest).toContain('SQLite Post');
    expect(latest).not.toContain('Older SQLite Post');
    expect(latest).toContain('target="_blank"');
    expect(latest).toContain('rel="noopener noreferrer"');

    const allIssues = await withServer(path, '/newsletters?scope=all');
    expect(allIssues).toContain('SQLite Post');
    expect(allIssues).toContain('Older SQLite Post');
    expect(allIssues).toContain('2026-05-10');
    expect(allIssues).toContain('name="category"');
    expect(allIssues).toContain('name="q"');
  });
});