// deno-lint-ignore no-import-prefix
import { serveDir } from "jsr:@std/http@1.0.21/file-server";

type Addr = {
    hostname: string;
    port: number;
};

function alertListening(addr: Addr) {
    console.log(`Listening on http://${addr.hostname}:${addr.port}/`);
}

async function buildDocs() {
    console.log("building docs");
    await new Deno.Command("deno", {
        args: ["task", "build"],
        cwd: "docs",
    }).output();
    console.log("done");
}

async function watchAndBuildDocs() {
    let changeOccurred = true;
    let running = false;
    setInterval(async () => {
        if (!changeOccurred || running) {
            return;
        }
        running = true;
        await buildDocs();
        changeOccurred = false;
        running = false;
    }, 250);
    const watcher = Deno.watchFs(["docs/src"]);
    for await (const _ of watcher) {
        changeOccurred = true;
    }
}

function serveDist(addr: Addr) {
    Deno.serve({
        port: addr.port,
        hostname: addr.hostname,
        onListen: (_) => alertListening(addr),
    }, (req: Request) => {
        return serveDir(req, { quiet: true, showIndex: true });
    });
}

if (import.meta.main) {
    await buildDocs();
    watchAndBuildDocs();
    serveDist({
        hostname: "0.0.0.0",
        port: 8180,
    });
}