// Debug
const { DebugBuilder } = require("../utilities/debugBuilder.js");
const log = new DebugBuilder("client", "botController");
const botLog = new DebugBuilder("client", "botController:bot");
// Modules
const spawn = require('child_process').spawn;
const { resolve } = require("path");
require('dotenv').config();
const { closeProcessWrapper } = require("../utilities/utilities");

// Global vars
let pythonProcess;
let recordingProcess;

/**
 * Get Status of the discord process
 */
exports.getStatus = (req, res) => {
    log.INFO("Getting the status of the bot");
    if (pythonProcess) return res.sendStatus(200);
    return res.sendStatus(201);
}

/**
 * Start the bot and join the server and preset specified
 */
exports.joinServer = async (req, res) => {
    if (!req.body.clientId || !req.body.channelId) return res.status(500).json({"message": "You must include the client ID (discord token), channel ID (The discord ID of the channel to connect to)"});
    const deviceId = process.env.AUDIO_DEVICE_ID;
    const channelId = req.body.channelId;
    const clientId = req.body.clientId;
    const presetName = req.body.presetName;
    const NGThreshold = req.body.NGThreshold ?? 50

    // Joining the discord server
    log.INFO("Join requested to: ", deviceId, channelId, clientId, presetName, NGThreshold);
    if (process.platform === "win32") {
        log.DEBUG("Starting Windows Python");        
        pythonProcess = await spawn('python.exe', [resolve(__dirname, "../pdab/main.py"), deviceId, channelId, clientId, '-n', NGThreshold, '-p', presetName ], { cwd: resolve(__dirname, "../pdab/").toString() });
        //pythonProcess = await spawn('C:\\Python310\\python.exe', [resolve(__dirname, "../PDAB/main.py"), deviceId, channelId, clientId, NGThreshold ]);
    }
    else {
        log.DEBUG("Starting Linux Python");
        pythonProcess = await spawn('python3', [resolve(__dirname, "../pdab/main.py"), deviceId, channelId, clientId,'-n', NGThreshold, '-p', presetName ], { cwd: resolve(__dirname, "../pdab/") });
    }    

    log.VERBOSE("Python Process: ", pythonProcess);

    let fullOutput;
    pythonProcess.stdout.setEncoding('utf8');    
    pythonProcess.stdout.on("data", (data) => {
        botLog.VERBOSE("From Process: ", data);
        fullOutput += data.toString();
    });

    pythonProcess.stderr.on('data', (data) => {
        botLog.VERBOSE(`stderr: ${data}`);
        fullOutput += data.toString();
      });
      
    pythonProcess.on('close', (code) => {
    log.DEBUG(`child process exited with code ${code}`);
    log.VERBOSE("Full output from bot: ", fullOutput);
    }); 

    pythonProcess.on("error", (code, signal) => {
        log.ERROR("Error from the discord bot process: ", code, signal);
    });

    // Starting the radio application

    return res.sendStatus(200);
}

/**
 * Leaves the server if it's in one
 */
exports.leaveServer = async (req, res) => {
    log.INFO("Leaving the server");
    if (!pythonProcess) return res.sendStatus(200)

    pythonProcess = await closeProcessWrapper(pythonProcess);
    
    return res.sendStatus(202);
}

/**
 * Start a recording of what the bot is listening to, if it's currently connected
 * 
 * @param {*} req 
 * @param {*} res 
 */
exports.startRecording = async (req, res) => {
    log.INFO("Starting recording")
    //if (pythonProcess === undefined) return res.sendStatus(204);
    if (!recordingProcess === undefined) return res.sendStatus(202);
    const deviceId = process.env.AUDIO_DEVICE_ID;
    const filename = "./recordings/" + new Date().toJSON().slice(0,10) + ".wav";

    // Joining the server to record
    log.INFO("Start recording: ", deviceId, filename);
    if (process.platform === "win32") {
        log.DEBUG("Starting Windows Python");        
        recordingProcess = await spawn('python', [resolve(__dirname, "../pdab/recorder.py"), deviceId, filename ], { cwd: resolve(__dirname, "../pdab/").toString() });        
    }
    else {
        log.DEBUG("Starting Linux Python");
        recordingProcess = await spawn('python3', [resolve(__dirname, "../pdab/recorder.py"), deviceId, filename ], { cwd: resolve(__dirname, "../pdab/") });
    }

    await this.getProcessOutput(recordingProcess);
    
    return res.sendStatus(200);
}

/**
 * Stop the recording if the bot is currently recording
 * 
 * @param {*} req 
 * @param {*} res 
 */
exports.stopRecording = async (req, res) => {
    log.INFO("Stopping recording the server");
    if (!recordingProcess) return res.sendStatus(202)

    recordingProcess = await closeProcessWrapper(recordingProcess);
    
    return res.sendStatus(200);
}


/**
 * Get the output of a running process
 * 
 * @param {*} runningProcess 
 * @returns 
 */
exports.getProcessOutput = async (runningProcess) => {
    let fullOutput;
    runningProcess.stdout.setEncoding('utf8');    
    runningProcess.stdout.on("data", (data) => {
        botLog.VERBOSE("From Process: ", data);
        fullOutput += data.toString();
    });

    runningProcess.stderr.on('data', (data) => {
        botLog.VERBOSE(`stderr: ${data}`);
        fullOutput += data.toString();
      });
      
      runningProcess.on('close', (code) => {
    log.DEBUG(`child process exited with code ${code}`);
    log.VERBOSE("Full output from bot: ", fullOutput);
    }); 

    runningProcess.on("error", (code, signal) => {
        log.ERROR("Error from the process: ", code, signal);
    });
}