//go:build windows

package disk

import (
	"path/filepath"
	"strings"

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

func IsMountPoint(path string) bool {
	clean := filepath.Clean(path)
	volume := filepath.VolumeName(clean)
	if volume == "" {
		return false
	}
	root := volume + `\`
	return strings.EqualFold(clean, root)
}

func DiskUsage(mountPath string) (total, free int64, err error) {
	root := filepath.Clean(mountPath)
	if volume := filepath.VolumeName(root); volume != "" {
		root = volume + `\`
	}

	pathPtr, err := windows.UTF16PtrFromString(root)
	if err != nil {
		return 0, 0, err
	}

	var freeBytesAvailable uint64
	var totalNumberOfBytes uint64
	var totalNumberOfFreeBytes uint64
	if err := windows.GetDiskFreeSpaceEx(pathPtr, &freeBytesAvailable, &totalNumberOfBytes, &totalNumberOfFreeBytes); err != nil {
		return 0, 0, err
	}
	return int64(totalNumberOfBytes), int64(freeBytesAvailable), nil
}