//go:build darwin

package main

import (
	"bytes"
	"fmt"
	"os/exec"
	"strings"
)

// "choose file name" is the standard NSSavePanel; it asks before replacing an
// existing file. Text is passed via argv (no AppleScript string quoting).
const saveDialogAS = `on run argv
	set nm to item 1 of argv
	set dir to item 2 of argv
	activate
	set f to choose file name with prompt "Save timestamped print as" default name nm default location (POSIX file dir)
	return POSIX path of f
end run`

func nativeSaveDialog(name, dir string) (string, bool, error) {
	cmd := exec.Command("/usr/bin/osascript", "-e", saveDialogAS, name, dir)
	var out, errb bytes.Buffer
	cmd.Stdout, cmd.Stderr = &out, &errb
	if err := cmd.Run(); err != nil {
		if strings.Contains(errb.String(), "-128") { // User canceled.
			return "", false, nil
		}
		return "", false, fmt.Errorf("%v: %s", err, strings.TrimSpace(errb.String()))
	}
	p := strings.TrimSpace(out.String())
	if p == "" {
		return "", false, fmt.Errorf("empty path from dialog")
	}
	return p, true, nil
}