import type { MetadataRoute } from 'next'
import { getAllTags, getPosts } from '@/lib/posts'
import { tagToSlug } from '@/lib/tags'

const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'https://localhost:3000'

export const dynamic = 'force-static'

const absoluteUrl = (pathname: string): string => new URL(pathname, siteUrl).toString()

const [posts, tags] = await Promise.all([getPosts(), getAllTags()])

export default function sitemap(): MetadataRoute.Sitemap {
  return [
    { url: absoluteUrl('/') },
    { url: absoluteUrl('/blog/') },
    ...posts.map((post) => ({ url: absoluteUrl(`/blog/${post.slug}/`) })),
    ...tags.map((tag) => ({ url: absoluteUrl(`/blog/tags/${tagToSlug(tag.label)}/`) })),
  ]
}