//go:build windows

package handler

import "golang.org/x/sys/windows"

// diskUsage 返回指定目录所在磁盘的已用百分比(0-100)、可用字节、总字节。
func diskUsage(path string) (usedPercent int, freeBytes, totalBytes uint64, err error) {
	p, e := windows.UTF16PtrFromString(path)
	if e != nil {
		return 0, 0, 0, e
	}
	var freeAvail, total, totalFree uint64
	if e := windows.GetDiskFreeSpaceEx(p, &freeAvail, &total, &totalFree); e != nil {
		return 0, 0, 0, e
	}
	if total == 0 {
		return 0, totalFree, total, nil
	}
	used := total - totalFree
	return int(used * 100 / total), totalFree, total, nil
}