//go:build darwin
// +build darwin

package staros

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

// StartTime is not implemented on Darwin yet.
func StartTime() time.Time {
	return time.Time{}
}

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

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

func CpuUsageByPid(pid int, sleep time.Duration) float64 {
	return 0
}

func CpuUsage(sleep time.Duration) float64 {
	return 0
}

func DiskUsage(path string) (disk DiskStatus) {
	disk, _ = DiskUsageE(path)
	return
}

func DiskUsageE(path string) (disk DiskStatus, err error) {
	if path == "" {
		path = "."
	}
	fs := syscall.Statfs_t{}
	if err = syscall.Statfs(path, &fs); err != nil {
		return
	}
	disk.All = fs.Blocks * uint64(fs.Bsize)
	disk.Free = fs.Bfree * uint64(fs.Bsize)
	disk.Available = fs.Bavail * uint64(fs.Bsize)
	disk.Used = disk.All - disk.Free
	return
}