/*
 * Veskslop development tool — run one expression in the real client over CDP.
 *
 * Use it with the client started on --remote-debugging-port=9222. The main use
 * is to dispatch synthetic events for end-to-end tests.
 *
 * Usage:
 *   CDP_EXPRESSION='Vencord.Webpack.Common.FluxDispatcher.dispatch({...})' pnpm cdp:dispatch
 */

import WebSocket from "ws";

const expression = process.env.CDP_EXPRESSION;
if (!expression) {
    console.error("CDP_EXPRESSION is required");
    process.exit(1);
}

const cdpUrl = process.env.CDP_URL ?? "http://127.0.0.1:9222";
const targets = (await (await fetch(`${cdpUrl}/json`)).json()) as any[];
const page = targets.find(target => target.type === "page" && target.url.includes("discord.com"));

if (!page) {
    console.error("No Discord page target");
    process.exit(1);
}

const ws = new WebSocket(page.webSocketDebuggerUrl);
await new Promise<void>((resolve, reject) => {
    ws.once("open", () => resolve());
    ws.once("error", reject);
});

const response = await new Promise<any>((resolve, reject) => {
    const timer = setTimeout(() => reject(new Error("CDP evaluate timed out")), 10_000);

    ws.on("message", raw => {
        const message = JSON.parse(raw.toString());
        if (message.id !== 1) return;

        clearTimeout(timer);
        resolve(message);
    });

    ws.send(
        JSON.stringify({
            id: 1,
            method: "Runtime.evaluate",
            params: { expression, returnByValue: true, awaitPromise: true }
        })
    );
});

console.log(JSON.stringify(response.result ?? response.error));
ws.close();