// Debug
const { DebugBuilder } = require("../utilities/debugBuilder.js");
const log = new DebugBuilder("client", "radioController");
// Modules 
require('dotenv').config();
const { closeProcessWrapper, changeCurrentConfigWrapper, openRadioSessionWrapper } = require("../utilities/utilities");

let radioChildProcess;

/**
 * Closes the radio executable if it's in one
 */
exports.closeRadioSession = async (req, res) => {
    if (!radioChildProcess || !req.body.radioSession) return res.sendStatus(204);
    if (radioChildProcess) radioChildProcess = await closeProcessWrapper(radioChildProcess);
    if (req.body.radioSession) req.body.radioSession = await closeProcessWrapper(req.body.radioSession);
    if (!radioChildProcess) return res.sendStatus(200);
}

/**
 * Change the current 'cfg.json' file to the preset specified
 * @param {string} presetName 
 */
exports.changeCurrentConfig = async (req, res) => {
    const presetName = req.body.presetName;
    if (!presetName) return res.status(500).json("You must include the preset name")

    const updatedConfigObject = await changeCurrentConfigWrapper(presetName);

    // No change was made to the config
    if (!updatedConfigObject) return res.sendStatus(200);

    // Error was encountered
    if (typeof updatedConfigObject === "string") return res.status(500).json(updatedConfigObject);

    // There was a change made to the config, reopening the radio session if it was open
    if (radioChildProcess) {
        log.DEBUG("Radio session open, restarting to accept the new config");
        const radioSessionResult = await openRadioSessionWrapper(radioChildProcess, presetName);

        // throw an error to the client if the wrapper ran into an error
        if (typeof radioSessionResult === "string") return res.status(500).json(updatedConfigObject);
    }
    
    return res.sendStatus(202);
}

/**
 * Open a new OP25 process tuned to the specified system
 */
exports.openRadioSession = async (req, res) => {
    const presetName = req.body.presetName;
    if(!presetName) return res.status(500).json({"message": "You must include the preset name to start the radio session with"})

    radioChildProcess = await openRadioSessionWrapper(radioChildProcess, presetName);

    // throw an error to the client if the wrapper ran into an error
    if (typeof radioSessionResult === "string") return res.status(500).json(updatedConfigObject);

    return res.sendStatus(200);
}

/**
 * Attach the radio session to the request to be used elsewhere
 * 
 * @param {*} req 
 * @param {*} res 
 */
exports.attachRadioSessionToRequest = async (req, res, next) => {
    req.body.radioSession = radioChildProcess;
    next();
}