import { MetadataRoute } from 'next'
import { getAllPosts } from '@/lib/markdown'

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  const baseUrl = process.env.NEXT_PUBLIC_SITE_URL || 'http://localhost:3030'
  
  // Get all blog posts
  const posts = await getAllPosts("en", false)
  
  // Generate sitemap entries for blog posts
  const blogPosts: MetadataRoute.Sitemap = posts.map(post => ({
    url: `${baseUrl}/blog/${post.slug}`,
    lastModified: new Date(post.frontmatter.date),
    changeFrequency: 'monthly' as const,
    priority: 0.8,
  }))
  
  // Static pages
  const staticPages: MetadataRoute.Sitemap = [
    {
      url: baseUrl,
      lastModified: new Date(),
      changeFrequency: 'daily' as const,
      priority: 1.0,
    },
    {
      url: `${baseUrl}/blog`,
      lastModified: new Date(),
      changeFrequency: 'daily' as const,
      priority: 0.9,
    },
    {
      url: `${baseUrl}/about`,
      lastModified: new Date(),
      changeFrequency: 'monthly' as const,
      priority: 0.7,
    },
  ]
  
  return [...staticPages, ...blogPosts]
}