import { MetadataRoute } from "next";
import { blogPosts, SITE_URL } from "@/data/blog";

export default function sitemap(): MetadataRoute.Sitemap {
  const staticRoutes = [
    "",
    "/about",
    "/contact",
    "/blog",
    "/air-freight",
    "/first-mile-delivery",
    "/mid-mile-delivery",
    "/last-mile-delivery",
    "/ev-logistics",
    "/strategy-optimization",
    "/how-it-works",
  ].map((route) => ({
    url: `${SITE_URL}${route}`,
    lastModified: new Date().toISOString().split("T")[0],
    changeFrequency: "weekly" as const,
    priority: route === "" ? 1 : 0.8,
  }));

  const postRoutes = blogPosts.map((post) => ({
    url: `${SITE_URL}/blog/${post.slug}`,
    lastModified: post.date,
    changeFrequency: "monthly" as const,
    priority: 0.6,
  }));

  return [...staticRoutes, ...postRoutes];
}