// SENDER MODULE
const net = require("net"); // Node.js module for TCP connections

// CONFIGURATION
const PLUGIN_HOST = "localhost"; // IP address of the server running the Java plugin
const PLUGIN_PORT = 25579;       // Port defined in the plugin configuration
const TOKEN = "123";             // Secret token configured in config.yml

/**
* Sends a command to the CommandRelayPlugin via TCP.
* @param {string} command - The command string to be executed on the server.
* @returns {Promise<string>} - Resolves with the response from the plugin.
*/
function sendCommandToPlugin(command) {
  return new Promise((resolve, reject) => {
    // Create a TCP connection to the plugin server
    const client = net.createConnection(
      { host: PLUGIN_HOST, port: PLUGIN_PORT },
      () => {
        console.log("✅ Connected to TCP plugin server");
        // Send the token and command separated by ':', followed by a newline
        client.write(`${TOKEN}:${command}\n`);
      }
    );

    let dataBuffer = ""; // Buffer to collect response data

    // Collect data sent back by the plugin
    client.on("data", (data) => {
      dataBuffer += data.toString();
    });

    // When the server ends the connection, resolve the promise with the response
    client.on("end", () => {
      console.log("⬅ Response from plugin:", dataBuffer.trim());
      resolve(dataBuffer.trim());
    });

    // Handle any connection errors
    client.on("error", (err) => {
      console.error("❌ Error connecting to plugin:", err.message);
      reject(err);
    });
  });
}

// EXAMPLE USAGE
(async () => {
  try {
    // Send a command to the plugin
    const response = await sendCommandToPlugin("say Hello from Node.js");
    console.log("Final response:", response);
  } catch (err) {
    console.error("Connection failed:", err);
  }
})();