let source;
const eventCallbacks = [];
function getSocketProtocol(assetPrefix) {
    let protocol = location.protocol;
    try {
        protocol = new URL(assetPrefix).protocol;
    } catch (_) {}
    return protocol === "http:" ? "ws" : "wss";
}
export function addMessageListener(cb) {
    eventCallbacks.push(cb);
}
export function sendMessage(data) {
    if (!source || source.readyState !== source.OPEN) return;
    return source.send(data);
}
export function connectHMR(options) {
    const { timeout = 5 * 1000 } = options;
    function init() {
        if (source) source.close();
        console.log("[HMR] connecting...");
        function handleOnline() {
            const connected = {
                type: "turbopack-connected"
            };
            eventCallbacks.forEach((cb)=>{
                cb(connected);
            });
            if (options.log) console.log("[HMR] connected");
        }
        function handleMessage(event) {
            const message = {
                type: "turbopack-message",
                data: JSON.parse(event.data)
            };
            eventCallbacks.forEach((cb)=>{
                cb(message);
            });
        }
        function handleDisconnect() {
            source.close();
            setTimeout(init, timeout);
        }
        const { hostname, port } = location;
        const protocol = getSocketProtocol(options.assetPrefix || "");
        const assetPrefix = options.assetPrefix.replace(/^\/+/, "");
        let url = `${protocol}://${hostname}:${port}${assetPrefix ? `/${assetPrefix}` : ""}`;
        if (assetPrefix.startsWith("http")) {
            url = `${protocol}://${assetPrefix.split("://")[1]}`;
        }
        source = new window.WebSocket(`${url}${options.path}`);
        source.onopen = handleOnline;
        source.onerror = handleDisconnect;
        source.onmessage = handleMessage;
    }
    init();
}