package mouse

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

type NopHandler struct{}

func (n NopHandler) HandleMouseEvent(s State) bool {
	return false
}

type State struct {
	X, Y                      int
	LeftDown, RightDown       bool
	LeftChanged, RightChanged bool
	LeftClicked, RightClicked bool
	Clicked                   bool
}

//func ClickHandler(e elements.Element) func() bool {
//	newState := StateBuilder()
//	return func() bool {
//		_ = newState()
//		if
//	}
//}

func StateBuilder() func() State {
	prevState := State{}
	state := State{}
	return func() State {
		state = prevState
		state.X, state.Y = ebiten.CursorPosition()

		if inpututil.IsMouseButtonJustPressed(ebiten.MouseButtonLeft) {
			state.LeftDown = true
		}
		if inpututil.IsMouseButtonJustPressed(ebiten.MouseButtonRight) {
			state.RightDown = true
		}
		if inpututil.IsMouseButtonJustReleased(ebiten.MouseButtonLeft) {
			state.LeftDown = false
			if !state.RightDown {
				state.Clicked = true
			}
		}
		if inpututil.IsMouseButtonJustReleased(ebiten.MouseButtonRight) {
			state.RightDown = false
			if !state.LeftDown {
				state.Clicked = true
			}
		}

		state.Clicked = state.Clicked && !prevState.Clicked

		state.LeftChanged = state.LeftDown != prevState.LeftDown
		state.RightChanged = state.RightDown != prevState.RightDown

		prevState = state
		return state
	}
}