package elements

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

type ElementFunc func(Dimensions) Element

type MouseState struct {
	X, Y                      int32
	LeftDown, RightDown       bool
	LeftChanged, RightChanged bool
}

type Clickable interface {
	HandleClick(s MouseState) error
}

type Mouseable interface {
	HandleMouseEnter(s MouseState) error
	HandleMouseLeave(s MouseState) error
	HandleMouseMove(s MouseState) error
	HandleMouseDown(s MouseState) error
	HandleMouseUp(s MouseState) error
}

type Element interface {
	Draw(image *ebiten.Image, anchorX, anchorY float64) (w, h float64)
}

type Dimensions struct {
	zx, zy float64
	wx, wy float64
}

type mouseHandler struct {
	mouseState     MouseState
	prevMouseState MouseState
}

func (b *mouseHandler) HandleMouseEnter(s MouseState) error {
	b.mouseState = s
	return nil
}

func (b *mouseHandler) HandleMouseLeave(s MouseState) error {
	b.prevMouseState = b.mouseState
	b.mouseState = MouseState{}
	return nil
}

func (b *mouseHandler) HandleMouseMove(s MouseState) error {
	b.prevMouseState = b.mouseState
	b.mouseState = s
	return nil
}

func (b *mouseHandler) HandleMouseDown(s MouseState) error {
	b.prevMouseState = b.mouseState
	b.mouseState = s
	return nil
}

func (b *mouseHandler) HandleMouseUp(s MouseState) error {
	b.prevMouseState = b.mouseState
	b.mouseState = s
	return nil
}