//go:build darwin

package main

import (
	"os/exec"
	"strconv"
	"strings"
)

// desktopSize returns the visible desktop size in points (device-independent
// pixels), matching Fyne's coordinate system. It uses osascript instead of
// cgo so the binary stays a plain Go build. Returns (0, 0) if it can't be
// determined, in which case the caller skips clamping.
func desktopSize() (float32, float32) {
	// "bounds of window of desktop" -> "0, 0, W, H" in points.
	out, err := exec.Command("osascript", "-e",
		`tell application "Finder" to get bounds of window of desktop`).Output()
	if err != nil {
		return 0, 0
	}
	parts := strings.Split(strings.TrimSpace(string(out)), ", ")
	if len(parts) < 4 {
		return 0, 0
	}
	w, errW := strconv.ParseFloat(strings.TrimSpace(parts[2]), 32)
	h, errH := strconv.ParseFloat(strings.TrimSpace(parts[3]), 32)
	if errW != nil || errH != nil {
		return 0, 0
	}
	return float32(w), float32(h)
}