//go:build windows

package logic

import (
	"math"
	"os"

	"golang.org/x/sys/windows"

	"easygoadmin/api/v1"
)

// diskUsage 读取工作目录所在磁盘分区容量（Windows）
func diskUsage() []v1.ServerDiskInfo {
	wd, err := os.Getwd()
	if err != nil || len(wd) < 3 {
		return nil
	}
	root := wd[:3] // 形如 "E:\"
	handle, err := windows.UTF16PtrFromString(root)
	if err != nil {
		return nil
	}
	var freeBytes, totalBytes, totalFreeBytes uint64
	if err = windows.GetDiskFreeSpaceEx(handle, &freeBytes, &totalBytes, &totalFreeBytes); err != nil {
		return nil
	}
	total := float64(totalBytes) / 1073741824
	free := float64(freeBytes) / 1073741824
	usedPercent := 0.0
	if total > 0 {
		usedPercent = math.Round((total-free)/total*10000) / 100
	}
	return []v1.ServerDiskInfo{{
		Path:        root,
		TotalGB:     math.Round(total*100) / 100,
		FreeGB:      math.Round(free*100) / 100,
		UsedPercent: usedPercent,
	}}
}