let ws;

function connectWS() {
    ws = new WebSocket("ws://" + location.host + "/ws");

    ws.onopen = () => {
        console.log("WebSocket connesso");
    };

    ws.onclose = () => {
        console.log("WebSocket disconnesso, retry...");
        setTimeout(connectWS, 5000);
    };

    ws.onmessage = (event) => {
        let data;

        try {
            data = JSON.parse(event.data);
        } catch (e) {
            console.error("Invalid JSON received", e);
            return;
        }

        document.getElementById("datavalid").textContent = data.datavalid ?? "-";
        document.getElementById("timestamp").textContent = data.timestamp ?? "-";
        document.getElementById("volts_gen").textContent = data.volts_gen ?? "-";
        document.getElementById("eng_rpm").textContent = data.eng_rpm ?? "-";
        document.getElementById("adc_read_time").textContent = data.adc_read_time ?? "-";
        document.getElementById("n_queue_errors").textContent = data.n_queue_errors ?? "-";

        const coils12 = data.coils12 || {};
        const coils34 = data.coils34 || {};

        document.getElementById("coils12_spark_delay").textContent = coils12.spark_delay ?? "-";
        document.getElementById("coils34_spark_delay").textContent = coils34.spark_delay ?? "-";
        document.getElementById("coils12_spark_status").textContent = coils12.spark_status ?? "-";
        document.getElementById("coils34_spark_status").textContent = coils34.spark_status ?? "-";
        document.getElementById("coils12_sstart_status").textContent = coils12.sstart_status ?? "-";
        document.getElementById("coils34_sstart_status").textContent = coils34.sstart_status ?? "-";
        document.getElementById("coils12_peak_p_in").textContent = coils12.peak_p_in ?? "-";
        document.getElementById("coils34_peak_p_in").textContent = coils34.peak_p_in ?? "-";
        document.getElementById("coils12_peak_n_in").textContent = coils12.peak_n_in ?? "-";
        document.getElementById("coils34_peak_n_in").textContent = coils34.peak_n_in ?? "-";
        document.getElementById("coils12_peak_p_out").textContent = coils12.peak_p_out ?? "-";
        document.getElementById("coils34_peak_p_out").textContent = coils34.peak_p_out ?? "-";
        document.getElementById("coils12_peak_n_out").textContent = coils12.peak_n_out ?? "-";
        document.getElementById("coils34_peak_n_out").textContent = coils34.peak_n_out ?? "-";
        document.getElementById("coils12_level_spark").textContent = coils12.level_spark ?? "-";
        document.getElementById("coils34_level_spark").textContent = coils34.level_spark ?? "-";
        document.getElementById("coils12_n_events").textContent = coils12.n_events ?? "-";
        document.getElementById("coils34_n_events").textContent = coils34.n_events ?? "-";
        document.getElementById("coils12_n_missed_firing").textContent = coils12.n_missed_firing ?? "-";
        document.getElementById("coils34_n_missed_firing").textContent = coils34.n_missed_firing ?? "-";
    };
}

function start() {
    fetch("/start");
}

function stop() {
    fetch("/stop");
}

connectWS();