import { MetadataRoute } from 'next';
import sql from '@/lib/db';

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
    const baseUrl = process.env.NEXT_PUBLIC_BASE_URL || "https://mugladijitalmedya.com";

    // Static pages
    const staticPages = [
        '',
        '/about',
        '/services',
        '/works',
        '/contact',
    ].map((route) => ({
        url: `${baseUrl}${route}`,
        lastModified: new Date(),
        changeFrequency: 'weekly' as const,
        priority: route === '' ? 1 : 0.8,
    }));

    // Dynamic projects
    const projects = await sql`SELECT slug, updated_at FROM projects`;

    const projectPages = (projects || []).map((project) => ({
        url: `${baseUrl}/works/${project.slug}`,
        lastModified: new Date(project.updated_at || new Date()),
        changeFrequency: 'monthly' as const,
        priority: 0.6,
    }));

    // Programmatic SEO pages (Services + Locations)
    const [services, locations] = await Promise.all([
        sql`SELECT slug FROM services`,
        sql`SELECT slug FROM locations`
    ]);

    const pSeoPages = [];
    for (const service of services) {
        for (const location of locations) {
            pSeoPages.push({
                url: `${baseUrl}/services/${service.slug}/${location.slug}`,
                lastModified: new Date(),
                changeFrequency: 'weekly' as const,
                priority: 0.7,
            });
        }
    }

    return [...staticPages, ...projectPages, ...pSeoPages];
}