import { MetadataRoute } from 'next'

const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'https://pounce.ch'

// Popular TLDs to include in sitemap
const popularTlds = [
  'com', 'net', 'org', 'io', 'ai', 'co', 'dev', 'app', 'tech', 'xyz',
  'de', 'ch', 'uk', 'eu', 'fr', 'nl', 'at', 'it', 'es', 'pl',
  'info', 'biz', 'me', 'online', 'site', 'store', 'shop', 'blog', 'cloud',
]

export default function sitemap(): MetadataRoute.Sitemap {
  const now = new Date().toISOString()
  
  // Static pages
  const staticPages: MetadataRoute.Sitemap = [
    {
      url: siteUrl,
      lastModified: now,
      changeFrequency: 'daily',
      priority: 1.0,
    },
    {
      url: `${siteUrl}/tld-pricing`,
      lastModified: now,
      changeFrequency: 'hourly',
      priority: 0.9,
    },
    {
      url: `${siteUrl}/pricing`,
      lastModified: now,
      changeFrequency: 'weekly',
      priority: 0.8,
    },
    {
      url: `${siteUrl}/auctions`,
      lastModified: now,
      changeFrequency: 'hourly',
      priority: 0.8,
    },
    {
      url: `${siteUrl}/about`,
      lastModified: now,
      changeFrequency: 'monthly',
      priority: 0.6,
    },
    {
      url: `${siteUrl}/blog`,
      lastModified: now,
      changeFrequency: 'weekly',
      priority: 0.6,
    },
    {
      url: `${siteUrl}/contact`,
      lastModified: now,
      changeFrequency: 'monthly',
      priority: 0.5,
    },
    {
      url: `${siteUrl}/careers`,
      lastModified: now,
      changeFrequency: 'monthly',
      priority: 0.5,
    },
    {
      url: `${siteUrl}/privacy`,
      lastModified: now,
      changeFrequency: 'yearly',
      priority: 0.3,
    },
    {
      url: `${siteUrl}/terms`,
      lastModified: now,
      changeFrequency: 'yearly',
      priority: 0.3,
    },
    {
      url: `${siteUrl}/imprint`,
      lastModified: now,
      changeFrequency: 'yearly',
      priority: 0.3,
    },
    {
      url: `${siteUrl}/cookies`,
      lastModified: now,
      changeFrequency: 'yearly',
      priority: 0.3,
    },
  ]
  
  // TLD detail pages (high value for SEO)
  const tldPages: MetadataRoute.Sitemap = popularTlds.map((tld) => ({
    url: `${siteUrl}/tld-pricing/${tld}`,
    lastModified: now,
    changeFrequency: 'daily' as const,
    priority: 0.7,
  }))
  
  return [...staticPages, ...tldPages]
}