//go:build windows

package monitor

import (
	"os"
	"path/filepath"

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

func getDiskSpaceGB() (float64, float64) {
	wd, err := os.Getwd()
	if err != nil {
		return 0, 0
	}

	vol := filepath.VolumeName(wd)
	if vol == "" {
		return 0, 0
	}
	root := vol + `\\`

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

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

	const gb = 1024.0 * 1024.0 * 1024.0
	return float64(totalBytes) / gb, float64(totalFreeBytes) / gb
}