#!/usr/bin/env tsx

/**
 * Simple link checker for the blog
 * Tests: All internal links work, no broken references
 */

import fs from 'fs';
import path from 'path';

console.log('🔗 Checking links and references...\n');

let passed = 0;
let failed = 0;

function test(name: string, fn: () => void): void {
  try {
    fn();
    console.log(`✅ ${name}`);
    passed++;
  } catch (error) {
    console.log(`❌ ${name}`);
    if (error instanceof Error) {
      console.log(`   Error: ${error.message}`);
    }
    failed++;
  }
}

// Test 1: Check that all referenced blog posts exist
test('All blog post files exist', () => {
  const blogDir = path.join(process.cwd(), 'src/pages/blog');
  const files = fs.readdirSync(blogDir);
  
  // Get all .astro files
  const astroFiles = files.filter(f => f.endsWith('.astro'));
  
  if (astroFiles.length === 0) {
    throw new Error('No blog post files found');
  }
  
  // Check blogPosts.ts references exist
  const blogPostsPath = path.join(process.cwd(), 'src/data/blogPosts.ts');
  const content = fs.readFileSync(blogPostsPath, 'utf8');
  
  // Extract slug references
  const slugMatches = content.match(/slug:\s*['"]([^'"]+)['"]/g);
  if (!slugMatches) {
    throw new Error('No slugs found in blogPosts.ts');
  }
  
  const slugs = slugMatches.map(m => m.match(/['"]([^'"]+)['"]/)?.[1]);
  
  for (const slug of slugs) {
    const expectedFile = `${slug}.astro`;
    if (!astroFiles.includes(expectedFile)) {
      throw new Error(`Blog post file missing: ${expectedFile} (referenced in blogPosts.ts)`);
    }
  }
});

// Test 2: Check that tag pages reference valid tags
test('Tag references are valid', () => {
  const blogPostsPath = path.join(process.cwd(), 'src/data/blogPosts.ts');
  const content = fs.readFileSync(blogPostsPath, 'utf8');
  
  // Extract tags
  const tagsMatch = content.match(/tags:\s*\[([^\]]+)\]/);
  if (!tagsMatch) {
    throw new Error('No tags found in blogPosts.ts');
  }
  
  const tagsContent = tagsMatch[1];
  const tags = tagsContent.match(/['"]([^'"]+)['"]/g)?.map(t => t.replace(/['"]/g, ''));
  
  if (!tags || tags.length === 0) {
    throw new Error('No tags extracted');
  }
  
  // Check that tag page exists
  const tagPagePath = path.join(process.cwd(), 'src/pages/tags/[tag].astro');
  if (!fs.existsSync(tagPagePath)) {
    throw new Error('Tag page template missing');
  }
});

// Test 3: Check component imports
test('All component imports are valid', () => {
  const components = [
    'src/components/MediumCard.tsx',
    'src/components/SearchBar.tsx',
    'src/components/ArticleBlockquote.tsx',
    'src/components/ArticleHeading.tsx',
    'src/components/ArticleList.tsx',
    'src/components/ArticleParagraph.tsx'
  ];
  
  for (const component of components) {
    const componentPath = path.join(process.cwd(), component);
    if (!fs.existsSync(componentPath)) {
      throw new Error(`Component missing: ${component}`);
    }
    
    // Check for export
    const content = fs.readFileSync(componentPath, 'utf8');
    if (!content.includes('export')) {
      throw new Error(`Component has no exports: ${component}`);
    }
  }
});

// Test 4: Check page structure
test('All required pages exist', () => {
  const requiredPages = [
    'src/pages/index.astro',
    'src/pages/about.astro',
    'src/pages/blog.astro',
    'src/pages/tags/[tag].astro'
  ];
  
  for (const page of requiredPages) {
    const pagePath = path.join(process.cwd(), page);
    if (!fs.existsSync(pagePath)) {
      throw new Error(`Required page missing: ${page}`);
    }
  }
});

// Test 5: Check layout structure
test('Layout files are valid', () => {
  const layouts = [
    'src/layouts/BaseLayout.astro',
    'src/layouts/BlogLayout.astro'
  ];
  
  for (const layout of layouts) {
    const layoutPath = path.join(process.cwd(), layout);
    if (!fs.existsSync(layoutPath)) {
      throw new Error(`Layout missing: ${layout}`);
    }
    
    // Check for basic structure
    const content = fs.readFileSync(layoutPath, 'utf8');
    if (!content.includes('<slot')) {
      throw new Error(`Layout missing slot: ${layout}`);
    }
  }
});

// Test 6: Check style imports
test('Global styles are properly imported', () => {
  const baseLayoutPath = path.join(process.cwd(), 'src/layouts/BaseLayout.astro');
  const content = fs.readFileSync(baseLayoutPath, 'utf8');
  
  if (!content.includes('global.css')) {
    throw new Error('BaseLayout does not import global.css');
  }
  
  const globalCssPath = path.join(process.cwd(), 'src/styles/global.css');
  if (!fs.existsSync(globalCssPath)) {
    throw new Error('Global CSS file missing');
  }
});

// Summary
console.log('\n' + '='.repeat(50));
console.log(`Tests passed: ${passed}`);
console.log(`Tests failed: ${failed}`);
console.log('='.repeat(50));

if (failed === 0) {
  console.log('\n🎉 All link checks passed! Your blog structure is solid.');
  console.log('\nYour blog is ready to use!');
  process.exit(0);
} else {
  console.log('\n❌ Some checks failed. Please fix the errors above.');
  process.exit(1);
}