import { serveFile } from "jsr:@std/http/file-server";
import { createSSRApp } from "vue";
import { renderToString } from "vue/server-renderer";
import App from "@/App.tsx";
import transpileResponse from './transpile.ts';

const utf8Decoder = new TextDecoder("utf-8");

Deno.serve({
    port: 8080,
    hostname: "0.0.0.0",
    onListen({ port, hostname }) {
        console.log(`Listening on port http://${hostname}:${port}/`);
    },
}, async (req, _conn) => {
    if (req.method === "GET") {
        const pathname = URL.parse(req.url)?.pathname ?? "/";
        if (pathname === "/") {
            const rendered = await renderToString(createSSRApp(App));
            const content = utf8Decoder.decode(await Deno.readFile("./public/index.html"))
                .replace(`<!-- SSR OUTLET -->`, rendered)
                .replace(`<!-- SSR HEAD OUTLET -->`, '');
            return new Response(content, { headers: { "Content-Type": "text/html" } });
        } else if (pathname === "/health") {
            return new Response("OK");
        } else if (pathname.startsWith('/app') && (pathname.endsWith('.ts') || pathname.endsWith('.tsx'))) {
            const response = await serveFile(req, './' + pathname);
            return await transpileResponse(response, req.url, pathname);
        } else if (pathname.startsWith('/deps')) {
            return serveFile(req, `node_modules/${pathname.split('/deps')[1]}`);
        } else {
            return serveFile(req, `public${ pathname }`);
        }
    } else {
        return new Response("Only GET allowed.", { status: 500 });
    }
});

Deno.addSignalListener("SIGINT", () => {
    console.info("Shutting down (received SIGINT)");
    Deno.exit();
});