klz-cables.com/app/sitemap.ts

import { config } from '@/lib/config';
import { MetadataRoute } from 'next';
import { getAllProducts } from '@/lib/mdx';
import { getAllPosts } from '@/lib/blog';
import { getAllPages } from '@/lib/pages';

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  const baseUrl = config.baseUrl || 'https://klz-cables.com';
  const locales = ['de', 'en'];

  const routes = [
    '',
    '/blog',
    '/contact',
    '/team',
    '/products',
    '/products/low-voltage-cables',
    '/products/medium-voltage-cables',
    '/products/high-voltage-cables',
    '/products/solar-cables',
  ];

  const sitemapEntries: MetadataRoute.Sitemap = [];

  for (const locale of locales) {
    // Static routes
    for (const route of routes) {
      sitemapEntries.push({
        url: `${baseUrl}/${locale}${route}`,
        lastModified: new Date(),
        changeFrequency: route === '' ? 'daily' : 'weekly',
        priority: route === '' ? 1 : 0.8,
      });
    }

    // Products
    const products = await getAllProducts(locale);
    for (const product of products) {
      // We need to find the category for the product to build the URL
      // In this project, products are under /products/[category]/[slug]
      // The category is in product.frontmatter.categories
      const category =
        product.frontmatter.categories[0]?.toLowerCase().replace(/\s+/g, '-') || 'other';
      sitemapEntries.push({
        url: `${baseUrl}/${locale}/products/${category}/${product.slug}`,
        lastModified: new Date(),
        changeFrequency: 'monthly',
        priority: 0.7,
      });
    }

    // Blog posts
    const posts = await getAllPosts(locale);
    for (const post of posts) {
      sitemapEntries.push({
        url: `${baseUrl}/${locale}/blog/${post.slug}`,
        lastModified: new Date(post.frontmatter.date),
        changeFrequency: 'monthly',
        priority: 0.6,
      });
    }

    // Static pages
    const pages = await getAllPages(locale);
    for (const page of pages) {
      sitemapEntries.push({
        url: `${baseUrl}/${locale}/${page.slug}`,
        lastModified: new Date(),
        changeFrequency: 'monthly',
        priority: 0.5,
      });
    }
  }

  return sitemapEntries;
}