import type { MetadataRoute } from "next";
import { prisma } from "@/lib/prisma";
import { SITE } from "@/lib/site";

const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || SITE.siteUrl;

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  const [products, categories, collections, pages] = await Promise.all([
    prisma.product.findMany({ where: { active: true }, select: { slug: true, updatedAt: true } }),
    prisma.category.findMany({ select: { slug: true } }),
    prisma.collection.findMany({ select: { slug: true } }),
    prisma.pageSeo.findMany({ select: { path: true } }),
  ]);

  const staticEntries: MetadataRoute.Sitemap = pages.map((p) => ({
    url: `${siteUrl}${p.path}`,
    changeFrequency: p.path === "/" || p.path === "/shop" ? "daily" : "monthly",
    priority: p.path === "/" ? 1 : p.path === "/shop" ? 0.9 : 0.5,
  }));

  const categoryEntries: MetadataRoute.Sitemap = categories.map((c) => ({
    url: `${siteUrl}/shop?category=${c.slug}`,
    changeFrequency: "weekly",
    priority: 0.7,
  }));

  const collectionEntries: MetadataRoute.Sitemap = collections.map((c) => ({
    url: `${siteUrl}/shop?collection=${c.slug}`,
    changeFrequency: "weekly",
    priority: 0.6,
  }));

  const productEntries: MetadataRoute.Sitemap = products.map((p) => ({
    url: `${siteUrl}/product/${p.slug}`,
    lastModified: p.updatedAt,
    changeFrequency: "weekly",
    priority: 0.8,
  }));

  return [...staticEntries, ...categoryEntries, ...collectionEntries, ...productEntries];
}