import { getAllBlogs } from "@/content/blogs/blogs";
import { getAllAlbums } from "@/content/photos/albums";
import { getAllProjects } from "@/content/projects/projects";
import { getSettings } from "@/content/settings/settings";
import type { APIRoute } from "astro";
import minifyXML from "minify-xml";

export const GET = (async () => {
    const settings = await getSettings();

    let sitemapIndex: SitemapIndex[] = [
        {
            url: "/sitemap/pages.xml",
            lastModified: new Date()
        }
    ];

    if (settings.blog.enabled) {
        const blogLastModifieds = [
            settings.blog.lastModified,
            settings.sitemap.lastModified,
            settings.website.lastModified
        ];

        let blogs = await getAllBlogs(settings);

        blogs.forEach((blog) => {
            blogLastModifieds.push(blog.lastModified);
        });

        const lastModifiedBlogs = blogLastModifieds.sort((a: Date, b: Date) => {
            return b.getTime() - a.getTime();
        });

        sitemapIndex.push({
            url: "/sitemap/blogs.xml",
            lastModified: lastModifiedBlogs[0]
        });
    };
    if (settings.project.enabled) {
        const projectLastModifieds = [
            settings.project.lastModified,
            settings.sitemap.lastModified,
            settings.website.lastModified
        ];

        let projects = await getAllProjects(settings);

        projects.forEach((project) => {
            projectLastModifieds.push(project.lastModified);
        });

        const lastModifiedProjects = projectLastModifieds.sort((a: Date, b: Date) => {
            return b.getTime() - a.getTime();
        });

        sitemapIndex.push({
            url: "/sitemap/projects.xml",
            lastModified: lastModifiedProjects[0]
        });
    };
    if (settings.photo.enabled) {
        const photoLastModifieds = [
            settings.photo.lastModified,
            settings.sitemap.lastModified,
            settings.website.lastModified
        ];

        let albums = await getAllAlbums(settings);

        albums.forEach((album) => {
            photoLastModifieds.push(album.lastModified);
        });

        const lastModifiedAlbums = photoLastModifieds.sort((a: Date, b: Date) => {
            return b.getTime() - a.getTime();
        });

        sitemapIndex.push({
            url: "/sitemap/albums.xml",
            lastModified: lastModifiedAlbums[0]
        });
    };

    let sitemapContent = `
    <?xml version="1.0" encoding="UTF-8"?>
    <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
    ${sitemapIndex.map((item) => `
        <sitemap>
            <loc>${settings.website.domainName}${item.url}</loc>
            <lastmod>${item.lastModified.toISOString()}</lastmod>
        </sitemap>
    `).join('')}
    </sitemapindex>
    `;

    return new Response(minifyXML(sitemapContent), {
        status: 200,
        statusText: "OK",
        headers: {
            "Content-Type": "application/xml"
        }
    });
}) satisfies APIRoute;