// Copyright 2026 The TCell Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"fmt"
	"os"

	"github.com/gdamore/tcell/v3"
	"github.com/gdamore/tcell/v3/color"
)

func main() {
	tcell.SetEncodingFallback(tcell.EncodingFallbackASCII)
	s, e := tcell.NewScreen()
	if e != nil {
		fmt.Fprintf(os.Stderr, "%v\n", e)
		os.Exit(1)
	}
	if e = s.Init(); e != nil {
		fmt.Fprintf(os.Stderr, "%v\n", e)
		os.Exit(1)
	}
	defer s.Fini()

	s.SetStyle(tcell.StyleDefault)
	s.Clear()

	text := "This demonstrates cursor styles.  Press 0 through 6 to change the style."
	s.PutStr(1, 1, text)

	s.Put(2, 2, "0", tcell.StyleDefault)
	s.SetCursorStyle(tcell.CursorStyleDefault)
	s.ShowCursor(3, 2)

	for {
		s.Show()
		ev := <-s.EventQ()
		switch ev := ev.(type) {
		case *tcell.EventKey:
			switch ev.Key() {
			case tcell.KeyRune:
				switch ev.Str() {
				case "0":
					s.Put(2, 2, "0", tcell.StyleDefault)
					s.SetCursorStyle(tcell.CursorStyleDefault, color.Reset)
				case "1":
					s.Put(2, 2, "1", tcell.StyleDefault)
					s.SetCursorStyle(tcell.CursorStyleBlinkingBlock, color.Green)
				case "2":
					s.Put(2, 2, "2", tcell.StyleDefault)
					s.SetCursorStyle(tcell.CursorStyleSteadyBlock, color.Blue)
				case "3":
					s.Put(2, 2, "3", tcell.StyleDefault)
					s.SetCursorStyle(tcell.CursorStyleBlinkingUnderline, color.Red)
				case "4":
					s.Put(2, 2, "4", tcell.StyleDefault)
					s.SetCursorStyle(tcell.CursorStyleSteadyUnderline, color.Orange)
				case "5":
					s.Put(2, 2, "5", tcell.StyleDefault)
					s.SetCursorStyle(tcell.CursorStyleBlinkingBar, color.Yellow)
				case "6":
					s.Put(2, 2, "6", tcell.StyleDefault)
					s.SetCursorStyle(tcell.CursorStyleSteadyBar, color.Pink)
				}

			case tcell.KeyEscape, tcell.KeyEnter, tcell.KeyCtrlQ:
				return
			case tcell.KeyCtrlL:
				s.Sync()
			}
		case *tcell.EventResize:
			s.Sync()
		}
	}
}
