import type { MetadataRoute } from 'next'
import { getAllCategories, getArticles } from '@/lib/directus'

const BASE_URL = process.env.NEXT_PUBLIC_BASE_URL ?? 'https://kotobane.achmad.dev'

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  let categories: import('@/lib/types').Category[] = []
  let articles: import('@/lib/types').Article[] = []

  try {
    const [cats, arts] = await Promise.all([
      getAllCategories(),
      getArticles({ limit: 1000 }),
    ])
    categories = cats
    articles = arts
  } catch {
    // Directus not available — return homepage only
  }

  const categoryUrls: MetadataRoute.Sitemap = categories.map((cat) => ({
    url: `${BASE_URL}/${cat.slug}`,
    changeFrequency: 'daily',
    priority: 0.8,
  }))

  const articleUrls: MetadataRoute.Sitemap = articles.map((article) => ({
    url: `${BASE_URL}/${article.category.slug}/${article.slug}`,
    lastModified: article.published_at ? new Date(article.published_at) : new Date(),
    changeFrequency: 'weekly',
    priority: 0.6,
  }))

  return [
    { url: BASE_URL, changeFrequency: 'hourly', priority: 1.0 },
    ...categoryUrls,
    ...articleUrls,
  ]
}