#!/usr/bin/env node

/**
 * update-stories-page.js
 * 
 * This script reads the sitemap.xml file and updates the stories/index.html page
 * to include all story pages found in the sitemap.
 * 
 * No external dependencies required.
 */

const fs = require('fs');
const path = require('path');

// Configuration
const SITEMAP_PATH = path.join(__dirname, 'sitemap.xml');
const STORIES_INDEX_PATH = path.join(__dirname, 'stories', 'index.html');
const STORIES_PATH_PREFIX = '/stories/';
const STORIES_PATH_EXCLUDE = ['index.html', 'story-with-includes.html', 'template-story.html'];

// Helper function to get a friendly name from a filename
function getFriendlyName(filename) {
  // Remove .html extension
  let name = filename.replace('.html', '');
  
  // Split by hyphens and capitalize each word
  name = name.split('-').map(word => 
    word.charAt(0).toUpperCase() + word.slice(1)
  ).join(' ');
  
  return name;
}

// Simple XML parser for sitemap (no external dependencies)
function extractUrlsFromSitemap(sitemapContent) {
  const urls = [];
  const matches = sitemapContent.match(/<loc>([^<]+)<\/loc>/g) || [];
  
  for (const match of matches) {
    const url = match.replace('<loc>', '').replace('</loc>', '');
    urls.push(url);
  }
  
  return urls;
}

// Helper function to extract metadata from a story file
async function extractStoryMetadata(storyPath) {
  try {
    const content = fs.readFileSync(storyPath, 'utf8');
    
    // Default metadata
    let metadata = {
      title: getFriendlyName(path.basename(storyPath)),
      excerpt: 'Detailed case study and project information.',
      category: 'Project',
      date: 'Recent'
    };
    
    // Try to extract title from h1
    const h1Match = content.match(/<h1[^>]*>(.*?)<\/h1>/i);
    if (h1Match && h1Match[1]) {
      metadata.title = h1Match[1].trim();
    }
    
    // Try to extract excerpt from first paragraph after h1
    const excerptMatch = content.match(/<h1[^>]*>.*?<\/h1>\s*<p[^>]*>(.*?)<\/p>/is);
    if (excerptMatch && excerptMatch[1]) {
      metadata.excerpt = excerptMatch[1].trim().substring(0, 150) + '...';
    }
    
    // Try to extract category and date
    const categoryMatch = content.match(/<strong>Category:<\/strong>\s*(.*?)(?:<|$)/i);
    if (categoryMatch && categoryMatch[1]) {
      metadata.category = categoryMatch[1].trim();
    }
    
    const dateMatch = content.match(/<strong>(?:Date|Timeframe):<\/strong>\s*(.*?)(?:<|$)/i);
    if (dateMatch && dateMatch[1]) {
      metadata.date = dateMatch[1].trim();
    }
    
    return metadata;
  } catch (error) {
    console.error(`Error extracting metadata from ${storyPath}:`, error);
    return {
      title: getFriendlyName(path.basename(storyPath)),
      excerpt: 'Detailed case study and project information.',
      category: 'Project',
      date: 'Recent'
    };
  }
}

// Main function
async function updateStoriesPage() {
  try {
    console.log('Updating stories page from sitemap.xml...');
    
    // Check if sitemap.xml exists
    if (!fs.existsSync(SITEMAP_PATH)) {
      console.error('Sitemap.xml not found at:', SITEMAP_PATH);
      return;
    }
    
    // Check if stories/index.html exists
    if (!fs.existsSync(STORIES_INDEX_PATH)) {
      console.error('Stories index page not found at:', STORIES_INDEX_PATH);
      return;
    }
    
    // Read sitemap.xml
    const sitemapContent = fs.readFileSync(SITEMAP_PATH, 'utf8');
    const allUrls = extractUrlsFromSitemap(sitemapContent);
    
    // Find all story URLs in sitemap
    const storyUrls = [];
    
    for (const url of allUrls) {
      if (url.includes(STORIES_PATH_PREFIX)) {
        const filename = url.split('/').pop();
        if (!STORIES_PATH_EXCLUDE.includes(filename)) {
          storyUrls.push({
            url: url,
            filename: filename
          });
        }
      }
    }
    
    console.log(`Found ${storyUrls.length} story pages in sitemap.`);
    
    // Read stories/index.html
    const storiesIndexContent = fs.readFileSync(STORIES_INDEX_PATH, 'utf8');
    
    // Extract metadata for each story
    const storyCards = [];
    
    for (const storyUrl of storyUrls) {
      const storyPath = path.join(__dirname, 'stories', storyUrl.filename);
      if (fs.existsSync(storyPath)) {
        const metadata = await extractStoryMetadata(storyPath);
        storyCards.push({
          filename: storyUrl.filename,
          title: metadata.title,
          excerpt: metadata.excerpt,
          category: metadata.category,
          date: metadata.date
        });
      }
    }
    
    // Generate HTML for story cards
    let storiesGridHtml = '<div class="stories-grid">\n';
    
    for (const card of storyCards) {
      storiesGridHtml += `
            <div class="story-card">
                <h2>${card.title}</h2>
                <p class="story-excerpt">${card.excerpt}</p>
                <p class="story-meta">Category: ${card.category} | Date: ${card.date}</p>
                <a href="${card.filename}" class="story-link">Read Full Story</a>
            </div>
`;
    }
    
    storiesGridHtml += '        </div>';
    
    // Replace the stories grid in the index.html
    const updatedContent = storiesIndexContent.replace(
      /<div class="stories-grid">[\s\S]*?<\/div>\s*<hr>/,
      `${storiesGridHtml}\n\n        <hr>`
    );
    
    // Write the updated content back to the file
    fs.writeFileSync(STORIES_INDEX_PATH, updatedContent, 'utf8');
    
    console.log(`Updated stories page with ${storyCards.length} story cards.`);
  } catch (error) {
    console.error('Error updating stories page:', error);
  }
}

// Run the main function
updateStoriesPage();