package xyz.maxwellj.chookpen.client

import fuel.Fuel
import fuel.get
import java.io.File

import kotlin.system.exitProcess

import java.math.BigInteger
import java.security.MessageDigest

fun md5(input:String): String {
    val md = MessageDigest.getInstance("MD5")
    return BigInteger(1, md.digest(input.toByteArray())).toString(16).padStart(32, '0')
}

suspend fun main(args: Array<String>) {
	// Variables 
    var name = ""
    var server = ""
    var port = ""
    var hasHTTPS = "" 
    var password = ""
    var configFile = File(".chookpen.profile")
    
    if (!configFile.exists()) {
        println("You don't have a Chookpen profile set up yet. If you've got a Chookpen profile, type 'l' to login and press enter. Otherwise, just press enter.")
        val userInput = readln()
        if (userInput == "l") {
            println("Username:")
            name = readln()
            println("Password:")
            password = readln()
            val request = Fuel.get("http://localhost:8000/api/createAccount/username:{$name}token:{${md5(password)}}").body.string()
            if (request == "Invalid token! Please try putting in your password right") {
                println("Invalid password! Please rerun the program and put in the right password")
                exitProcess(1)
            } else {
                configFile.createNewFile()
                configFile.writeText("$name:$password:localhost:8000:0")
                println("Logged in! Run the command again to start talking!")
                exitProcess(0)
            }
        } else {
            println("Choose a username:")
            val newName = readln()
            if (newName == "") {
                println("Please choose a username! Rerun the program and try again")
                exitProcess(1)
            println("Choose a password:")
            val newPassword = readln()
            if (newPassword == "") {
                println("Please choose a password! Rerun the program and try again")
                exitProcess(1)
            }
            val request = Fuel.get("http://localhost:8000/api/createAccount/username:{$newName}token:{${md5(newPassword)}}").body.string()
            if (request == "That username already exists on the server! Please choose a different username") {
                println("That username already exists on the server! Rerun the program and choose a different username")
                exitProcess(1)
            } else {
                configFile.createNewFile()
                configFile.writeText("$newName:$newPassword:localhost:8000:0")
                println("Account created!")
                exitProcess(0)
            }
        }
    }
}

    var configStage = 0
    for (char in configFile.readText()) {
        if (char == ':') {configStage ++}
        if (configStage == 0) {
            name += char
        } else if (configStage == 1) {
            password += char
        } else if (configStage == 2) {
            server += char
        } else if (configStage == 3) {
            port += char
        } else if (configStage == 4) {
            hasHTTPS += char
        }
    }

    server = server.replace(":", "")
    port = port.replace(":", "")
    hasHTTPS = hasHTTPS.replace(":", "")
    password = password.replace(":", "")

    // Actual code
    println("Chookpen Client initialised!")
    println("Hello $name@$server")
    val protocol = "http"
    if (hasHTTPS == "1") {
        val protocol = "https"
    }
    if (args.count() == 0) {
        println(Fuel.get("$protocol://$server:$port/api/username:{$name}token:{${md5(password)}}").body.string())
    } else {
        val message = args[0]
        println(Fuel.get("$protocol://$server:$port/api/username:{$name}token:{${md5(password)}}message:{$message}").body.string())
    }
    exitProcess(0)
}