// +build linux darwin

package staros

import (
	"os/user"
	"strconv"
	"strings"
	"syscall"
	"time"
)

// StartTime 开机时间
func StartTime() time.Time {
	tmp, _ := readAsString("/proc/stat")
	data := splitBy(ReplaceByte9(tmp), " ")
	btime, _ := strconv.ParseInt(strings.TrimSpace(data["btime"]), 10, 64)
	return time.Unix(btime, 0)
}

// IsRoot 当前是否是管理员用户
func IsRoot() bool {
	uid, _ := user.Current()
	if uid.Uid == "0" {
		return true
	}
	return false
}

// Memory 系统内存信息
func Memory() MemStatus {
	var mem MemStatus
	ram := new(syscall.Sysinfo_t)
	if err := syscall.Sysinfo(ram); err != nil {
		return mem
	}
	mem.All = ram.Totalram
	mem.BuffCache = ram.Bufferram
	mem.Free = ram.Freeram
	mem.Shared = ram.Sharedram
	mem.Available = ram.Freeram + ram.Sharedram + ram.Bufferram
	mem.SwapAll = ram.Totalswap
	mem.SwapFree = ram.Freeswap
	mem.SwapUsed = mem.SwapAll - mem.SwapFree
	mem.Used = mem.All - mem.Free
	return mem
}

func Whoami() (uid, gid int, uname, gname, home string, err error) {
	var me *user.User
	var gup *user.Group
	me, err = user.Current()
	if err != nil {
		return
	}
	uid, _ = strconv.Atoi(me.Uid)
	gid, _ = strconv.Atoi(me.Uid)
	home = me.HomeDir
	uname = me.Username
	gup, err = user.LookupGroupId(me.Gid)
	if err != nil {
		return
	}
	gname = gup.Name
	return
}