const ws = new WebSocket(Deno.args[0])

async function do_work(key: string) {
    let progress = 0
    while (progress < 1) {
        await new Promise(r => setTimeout(r, Math.random() * 400))
        progress += 0.1
        ws.send(JSON.stringify({ t: "metadata", key, data: { progress } }))
    }
    ws.send(JSON.stringify({ t: "complete", key }))
}

ws.onerror = () => console.error("ws error")
ws.onclose = () => console.error("ws closed")
ws.onopen = () => {
    console.log("ws open");
    ws.send(JSON.stringify({ t: "register", name: "dummy worker", task_kinds: ["youtube"] }))
    ws.send(JSON.stringify({ t: "accept" }))
    ws.send(JSON.stringify({ t: "accept" }))
}
ws.onmessage = async ev => {
    if (typeof ev.data != "string") return
    const p = JSON.parse(ev.data)
    if (p.t == "error") console.error(`error: ${p.message}`);
    if (p.t == "work") {
        if (!p.data.output) throw new Error("no output");
        await do_work(p.key)
        ws.send(JSON.stringify({ t: "accept" }))
    }
}