const child_process = require('child_process');
const execSync = child_process.execSync;

const _consoleColorCodes = {
    Reset: "\x1b[0m",
    Bright: "\x1b[1m",
    Dim: "\x1b[2m",
    Underscore: "\x1b[4m",
    Blink: "\x1b[5m",
    Reverse: "\x1b[7m",
    Hidden: "\x1b[8m",

    FgBlack: "\x1b[30m",
    FgRed: "\x1b[31m",
    FgGreen: "\x1b[32m",
    FgYellow: "\x1b[33m",
    FgBlue: "\x1b[34m",
    FgMagenta: "\x1b[35m",
    FgCyan: "\x1b[36m",
    FgWhite: "\x1b[37m",

    BgBlack: "\x1b[40m",
    BgRed: "\x1b[41m",
    BgGreen: "\x1b[42m",
    BgYellow: "\x1b[43m",
    BgBlue: "\x1b[44m",
    BgMagenta: "\x1b[45m",
    BgCyan: "\x1b[46m",
    BgWhite: "\x1b[47m",
}

function Utils() {
    this.consoleColorCodes = _consoleColorCodes;
}

Utils.prototype.isCurrentUserRoot = function () {
    return process.getuid() == 0; // UID 0 is always root
}

Utils.prototype.printWelcomeMessage = function () {
    console.log("###################################")
    console.log("##### RaspiWiFi Intial Setup  #####")
    console.log("###################################")
}

Utils.prototype.printSetupCanceledMessage = function () {
    console.log("")
    console.log("")
    console.log("===================================================")
    console.log("---------------------------------------------------")
    console.log("")
    console.log("RaspiWiFi installation cancelled. Nothing changed...")
    console.log("")
    console.log("---------------------------------------------------")
    console.log("===================================================")
    console.log("")
    console.log("")
}

Utils.prototype.printFinishedMessage = function () {
    console.log("")
    console.log("")
    console.log("#####################################")
    console.log("##### RaspiWiFi Setup Complete  #####")
    console.log("#####################################")
    console.log("")
    console.log("")
}

Utils.prototype.checkForYN = function (input) {
    if (input.toLowerCase() !== 'y' && input.toLowerCase() !== 'n') {
        this.printColor(this.consoleColorCodes.FgRed, 'Please enter y or n!');
        return false;
    }
    return true;
}

Utils.prototype.printColor = function (color, ...args) {
    console.log(color, ...args, this.consoleColorCodes.Reset);
}

Utils.prototype.clearConsole = () => {
    //process.stdout.write('\033c');
    process.stdout.write('\x1bc');
}

Utils.prototype.installSystemDependencies = function () {
    this.clearConsole();
    execSync('apt update');
    this.clearConsole();
    execSync('apt install python3 python3-rpi.gpio python3-pip dnsmasq hostapd -y')
}

Utils.prototype.copyConfigs = function (isWpaEabled) {
    /* Creating application directories */
    this.printColor(null, 'Creating application directories');
    execSync('mkdir /usr/lib/raspiwifi');
    execSync('mkdir /etc/raspiwifi');
    execSync('mkdir /etc/cron.raspiwifi');

    /* Copy application files */
    this.printColor(null, 'Copy application files');
    execSync('cp -a libs/* /usr/lib/raspiwifi/');

    /* Backing up current files */
    this.printColor(null, 'Backing up current files');
    execSync('mv /etc/wpa_supplicant/wpa_supplicant.conf /etc/wpa_supplicant/wpa_supplicant.conf.original');
    execSync('mv /etc/dnsmasq.conf /etc/dnsmasq.conf.original');
    execSync('mv /etc/dhcpcd.conf /etc/dhcpcd.conf.original');

    /* Copy default files for basic device setup*/
    this.printColor(null, 'Copy default files for basic device setup');
    execSync('cp /usr/lib/raspiwifi/reset_device/static_files/dnsmasq.conf /etc/');
    execSync('cp /usr/lib/raspiwifi/reset_device/static_files/dhcpcd.conf /etc/');
    if (isWpaEabled)
        execSync('cp /usr/lib/raspiwifi/reset_device/static_files/hostapd.conf.wpa /etc/hostapd/hostapd.conf');
    else
        execSync('cp /usr/lib/raspiwifi/reset_device/static_files/hostapd.conf.nowpa /etc/hostapd/hostapd.conf');

    execSync('cp /usr/lib/raspiwifi/reset_device/static_files/aphost_bootstrapper /etc/cron.raspiwifi')
    execSync('chmod +x /etc/cron.raspiwifi/aphost_bootstrapper');

    execSync('mv /usr/lib/raspiwifi/reset_device/static_files/raspiwifi.conf /etc/raspiwifi');

    /* TODO: Setting up CRON for running monitoring jobs */
    this.printColor(null, 'Setting up CRON for running monitoring jobs');
    execSync('echo "# RaspiWiFi Startup" >> /etc/crontab');
    execSync('echo "@reboot root run-parts /etc/cron.raspiwifi/" >> /etc/crontab');

    /* Finishing things up */
    this.printColor(null, 'Finishing things up');
    execSync('touch /etc/raspiwifi/host_mode');
}

Utils.prototype.updateMainConfigFile = function ({ ssid, autoConfig, autoConfigDelay, sslEnabled, serverPort, wpaEnabled, wpaSecret }) {
    console.log(this);
    const outputString = this.serializeMainConfigFile({ ssid, autoConfig, autoConfigDelay, sslEnabled, serverPort, wpaEnabled, wpaSecret });
    const fileName = '/etc/raspiwifi/raspiwifi.conf'
    execSync('cat <<EOF >' + fileName + '\n' + outputString)

}

Utils.prototype.reboot = function () {
    execSync('reboot');
}

Utils.prototype.serializeMainConfigFile = function ({ ssid, autoConfig, autoConfigDelay, sslEnabled, serverPort, wpaEnabled, wpaSecret }) {
    const output = {
        'SSID': ssid,
        'AutoReconfig': autoConfig,
        'AutoReconfigDelay': autoConfigDelay,
        'SSLEnabled': sslEnabled,
        'ServerPort': serverPort,
        'WPAEnabled': wpaEnabled,
        'PSK': wpaSecret ?? '',
    }
    return JSON.stringify(output, null, 2);
}

Utils.prototype.deserializeMainConfigFile = (input) => {
    const obj = JSON.parse(input);
    return {
        ssid: obj['SSID'],
        autoConfig: obj['AutoReconfig'],
        autoConfigDelay: obj['AutoReconfigDelay'],
        sslEnabled: obj['SSLEnabled'],
        serverPort: obj['ServerPort'],
        wpaEnabled: obj['WPAEnabled'],
        wpaSecret: obj['PSK'] ?? '',
    }
}


module.exports = Utils;