package ui

import (
	"github.com/hajimehoshi/ebiten/v2"
	"github.com/hajimehoshi/ebiten/v2/inpututil"
)

type TextInput struct {
	TextBox
	input   string
	label   string
	focused bool
}

func (ti *TextInput) InitTextInput(x, y int, width, height int, label string) {
	ti.TextBox = *(NewFixedTextBox(x, y, width, height, "").Centering(true))
	ti.input = ""
	ti.label = label

	ti.renderImpl = func() *ebiten.Image {
		if ti.input == "" {
			ti.text = ti.label
		} else {
			ti.text = ti.input
		}

		return ti.render()
	}
}

func NewTextInput(x, y int, width, height int, label string) *TextInput {
	w := &TextInput{}
	w.InitTextInput(x, y, width, height, label)
	return w
}

func (ti *TextInput) SetInput(input string) {
	ti.input = input
	ti.ForceRedraw()
}

func (ti *TextInput) AddInput(input []rune) {
	ti.SetInput(ti.input + string(input))
}

func (ti *TextInput) HandleKey() {
	if inpututil.IsKeyJustPressed(ebiten.KeyBackspace) {
		if len(ti.input) > 0 {
			ti.input = ti.input[:len(ti.input)-1]
			ti.ForceRedraw()
		}
	}
}

func (ti *TextInput) Text() string {
	return ti.input
}

// return the text or use label as fallback
func (ti *TextInput) TextOrLabel() string {
	if ti.input != "" {
		return ti.input
	}
	return ti.label
}

func (*TextInput) IsFocusable() bool { return true }