package tui

import (
	"crypto/rand"
	"fmt"
	"os"
	"os/exec"
	"path/filepath"
)

// Readline reads a line of input from the user.
func Readline(prompt string) string {
	t.SetPrompt(prompt)
	s, err := t.ReadLine()
	must(err)
	return s
}

// ReadPassword reads a line of input from the user, but doesn't echo to the
// screen.
func ReadPassword(prompt string) string {
	s, err := t.ReadPassword(prompt)
	must(err)
	return s
}

// Edit the string s using the editor defined by the environment variable
// EDITOR.
func EditInEditor(s string) (string, error) {
	buf := make([]byte, 16)
	rand.Read(buf)
	path := filepath.Join(os.TempDir(), fmt.Sprintf("tui.%x", buf))
	defer os.RemoveAll(path)
	if err := os.WriteFile(path, []byte(s), 0600); err != nil {
		return s, err
	}

	editor := os.Getenv("EDITOR")
	if editor == "" {
		editor = "emacs"
	}

	cmd := exec.Command(editor, path)
	if err := cmd.Run(); err != nil {
		return s, err
	}

	buf, err := os.ReadFile(path)
	if err != nil {
		return s, err
	}

	return string(buf), nil
}