import type { MetadataRoute } from "next";
import { fallbackLocale, locales } from "@/config/i18n";
import { blogPosts } from "@/features/marketing/blogData";

const baseUrl = process.env.NEXT_PUBLIC_SITE_URL ?? "http://localhost:3000";

export default function sitemap(): MetadataRoute.Sitemap {
  const lastModified = new Date();

  const entries: MetadataRoute.Sitemap = [
    {
      url: `${baseUrl}/`,
      lastModified,
      changeFrequency: "weekly",
      priority: 1
    }
  ];

  const marketingSegments = ["about", "pricing", "faq", "blog"] as const;

  locales.forEach((locale) => {
    const localeBase = `${baseUrl}/${locale}`;

    entries.push({
      url: localeBase,
      lastModified,
      changeFrequency: "weekly",
      priority: locale === fallbackLocale ? 1 : 0.9
    });

    marketingSegments.forEach((segment) => {
      entries.push({
        url: `${localeBase}/${segment}`,
        lastModified,
        changeFrequency: "weekly",
        priority: 0.7
      });
    });

    blogPosts.forEach((post) => {
      entries.push({
        url: `${localeBase}/blog/${post.slug}`,
        lastModified,
        changeFrequency: "weekly",
        priority: 0.6
      });
    });
  });

  return entries;
}