<script>
// Settings

const baseUrl = 'https://domain.com/'; // Your website root
const sitemapURL = 'https://domain.com/sitemap.xml'; // Your sitemap URL
const notFoundTitleKeyword = 'Not Found'; // A keyword that is present in your "Not Found" page title. This might be "404", "Uh oh", "We can't find.." etc.
const ignoreWords = ['blog', 'feed', 'guide']; // Common words to ignore. These should be low-value words that are present in many of your URLs.
const minWordLength = 3; // Set the minimum word length in characters. This ignores low-value words like "to", "a", "the", etc.

// Only edit below here if you know what you're doing:

document.addEventListener('DOMContentLoaded', function() {
    if (document.title.includes(notFoundTitleKeyword)) {
        async function fetchSitemap(url) {
            try {
                const response = await fetch(url);
                const text = await response.text();
                const parser = new DOMParser();
                const xmlDoc = parser.parseFromString(text, "text/xml");
                const urls = xmlDoc.querySelectorAll('loc');
                return Array.from(urls).map(node => node.textContent);
            } catch (error) {
                console.error('Error fetching sitemap:', error);
                return [];
            }
        }
        function processCurrentURL() {
            const path = window.location.pathname;
            let segments = path.split('/').filter(segment => segment.length > 0 && !ignoreWords.includes(segment));
            segments = segments.map(segment => {
                if (segment.match(/^\d+$/)) return null;
                return segment.replace(/-/g, ' ');
            }).filter(segment => segment != null && segment.length > minWordLength);
            return segments.join(' ').split(' ').filter(word => word.length > minWordLength);
        }
        function findClosestMatch(currentKeywords, urls) {
          let bestMatch = '';
          let bestScore = 0;
          urls.forEach(url => {
              const urlParts = url.replace('https://colonyroofers.com/', '').split('/').filter(part => part.length);
              let score = 0;
              currentKeywords.forEach(keyword => {
                  if(urlParts.some(part => part.includes(keyword))) score++;
              });
              if(score > bestScore) {
                  bestScore = score;
                  bestMatch = url;
              }
          });
          return bestMatch;
        }
        async function redirectToClosestMatch() {
          const sitemapUrls = await fetchSitemap(sitemapURL);
          if (sitemapUrls.length === 0) {
              console.log('Sitemap is empty or could not be fetched.');
              return;
          }
          const currentKeywords = processCurrentURL();
          const closestMatch = findClosestMatch(currentKeywords, sitemapUrls);
          if(closestMatch) {
              console.log('Redirecting to:', closestMatch);
              window.location.replace(closestMatch);
          } else {
              console.log('No close match found.');
          }
        }
        redirectToClosestMatch();
    }
    else {
        console.log('Incorrect page title:', document.title);
    }
});
</script>