package main

import (
	"fmt"
	"os"
	"os/user"
	"github.com/go-ini/ini"
	"github.com/shirou/gopsutil/v3/mem"
)

func checkRoot() {
	currentUser, err := user.Current()
	if err != nil {
        fmt.Println("Error getting current user:", err)
        os.Exit(1)
    }
	if currentUser.Uid != "0" {
		fmt.Println("You must be root to run this script")
        os.Exit(1)
	}
}

func checkSettings() {
	if numberOfContainers < 1 && numberOfContainers > 7 {
		fmt.Println("Number of containers must be between 1 and 7")
        os.Exit(2)
	}

}

func ReadOSRelease(configfile string) map[string]string {
    cfg, err := ini.Load(configfile)
    if err != nil {
        fmt.Println("Fail to read file: ", err)
    }

    ConfigParams := make(map[string]string)
    ConfigParams["ID"] = cfg.Section("").Key("ID").String()

    return ConfigParams
}

func getDistro() string {
	OSInfo := ReadOSRelease("/etc/os-release")
	OSRelease := OSInfo["ID"]
	return OSRelease
}

func getMemory() string {
	system_mem, _ := mem.VirtualMemory()
	mem_gb := fmt.Sprintf("%.2f", (float64(system_mem.Total)/1073741824)*(float64(maxMemAllocPercent)/(float64(numberOfContainers)*100)))
	return mem_gb
}