#!/usr/bin/env node
/*
The Superalgos Platform is a software for algo-traders:

This module represents the Nodejs command that users have to start the Platform App..

*/

if (
    process.argv.includes("help") ||
    process.argv.includes("-help") ||
    process.argv.includes("--help") ||
    process.argv.includes("h") ||
    process.argv.includes("-h") ||
    process.argv.includes("--h") ||
    process.argv.includes("/h") ||
    process.argv.includes("/help")) {

    console.log('Superalgos')
    console.log('')
    console.log('VERSION:               ' + require('package.json').version)
    console.log('')
    console.log('WEB:                   https://www.superalgos.org')
    console.log('')
    console.log('GITHUB:                https://www.github.com/Superalgos')
    console.log('')
    console.log('TELEGRAM COMMUNITY:    https://t.me/superalgoscommunity')
    console.log('')
    console.log('USAGE:                 node platform [help] [noBrowser] [minMemo] [demoMode]')
    console.log('')
    console.log('OPTIONS:')
    console.log('')
    console.log('                       help:        Optional. Use it to see this helping information.')
    console.log('                       noBrowser:   Optional. Use it to launch Superalgos Platform Client only. The Superalgos Platform UI will not be loaded.')
    console.log('                       minMemo:     Optional. Use it when your hardware has less than 8 Gb or memory.')
    console.log('                       demoMode:    Optional. Use it to launch Superalgos in Demo Mode. Users will be able to use the UI but not run Tasks.')
    console.log('')
    console.log('If you are having an error while trying to run the Superalgos Platform Client, consider this:')

    fatalErrorHelp()
    return
}

const OS = require("os")
let totalRAM = OS.totalmem() // Get total ram installed
totalRAM = totalRAM / 1024 / 1024
let optimalRAM = totalRAM * 0.85 // Use 85% of installed RAM
let maxOldSpaceSize = "--max-old-space-size=" + (optimalRAM.toFixed(0)).toString()
let options

console.log('')
console.log("Total RAM istalled in this system is ........................ " + (totalRAM / 1024).toFixed(2) + " GB")
if (process.argv.includes("minMemo")) {
    options = {
        stdio: 'inherit'
    }
    console.log("Total RAM available for Superalgos is ....................... 512 MB")
} else {
    options = {
        execArgv: [maxOldSpaceSize],
        stdio: 'inherit'
    }
    console.log("Total RAM available for Superalgos is ....................... " + (optimalRAM / 1024).toFixed(2) + " GB")
    console.log('')
    console.log('If you would like to enable less RAM than that, use the minMemo flag. Note: RAM will be allocated only if needed.')
}
console.log('')
console.log('OPTIONS ACCEPTED:')
console.log('')
let optionsAccepted = 0

if (process.argv.includes("minMemo")) {
    optionsAccepted++
    console.log('minMemo ..................................................... Running with Minimun Required Memory.')
} 

if (process.argv.includes("noBrowser")) {
    optionsAccepted++
    console.log('noBrowser ................................................... Running without User Interface.')
}

if (process.argv.includes("demoMode")) {
    optionsAccepted++
    console.log('demoMode .................................................... Running without User Interface.')
}

if (optionsAccepted === 0) {
    console.log('none ........................................................ Running without any command line options.')
}

console.log('')
console.log('')

const fs = require('fs')
const path = './node_modules'
if ( fs.existsSync(path) ) {

    try {
        const { fork } = require('child_process')
        fork('./PlatformRoot.js', process.argv, options)
    } catch (err) {
        console.log('')
        console.log('Fail to create Superalgos Platform Client Process.')
        console.log('')

        fatalErrorHelp()
    }
} else {
    console.log('')
    console.log('ERROR: node_modules does not exist. Try running "node setup" to solve this issue. Then try again. You can finded detailed instructions for this in the ReadMe.')
    console.log('')
}


function fatalErrorHelp() {
    console.log('')
    console.log('* If your device does not have MORE than 8GB of RAM then please use the minMemo option.')
    console.log('* If your OS does not have a user interface, please use the noBrowser option.')
    console.log('')
    console.log('If you continue having trouble to start the Superalgos Platform Client try:')
    console.log('')
    console.log('node platform minMemo noBrowser')
}