//go:build linux

package monitor

import (
	"os"
	"syscall"
)

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

	var stat syscall.Statfs_t
	if err := syscall.Statfs(wd, &stat); err != nil {
		return 0, 0
	}

	const gb = 1024.0 * 1024.0 * 1024.0
	blockSize := uint64(stat.Bsize)

	totalBytes := stat.Blocks * blockSize
	freeBytes := stat.Bfree * blockSize

	return float64(totalBytes) / gb, float64(freeBytes) / gb
}