package d2gui

import (
	"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
)

type MouseHandler func(d2interface.MouseEvent)
type MouseMoveHandler func(d2interface.MouseMoveEvent)

type widget interface {
	render(target d2interface.Surface) error
	advance(elapsed float64) error

	onMouseMove(event d2interface.MouseMoveEvent) bool
	onMouseEnter(event d2interface.MouseMoveEvent) bool
	onMouseLeave(event d2interface.MouseMoveEvent) bool
	onMouseOver(event d2interface.MouseMoveEvent) bool
	onMouseButtonDown(event d2interface.MouseEvent) bool
	onMouseButtonUp(event d2interface.MouseEvent) bool
	onMouseButtonClick(event d2interface.MouseEvent) bool

	getPosition() (int, int)
	setOffset(x, y int)
	SetScreenPos(x, y int)
	ScreenPos() (x, y int)
	getSize() (int, int)
	getLayer() int
	isVisible() bool
	isExpanding() bool
}

type widgetBase struct {
	x         int
	y         int
	Sx		  int
	Sy        int
	layer     int
	visible   bool
	expanding bool

	offsetX int
	offsetY int

	mouseEnterHandler MouseMoveHandler
	mouseLeaveHandler MouseMoveHandler
	mouseClickHandler MouseHandler
}

func (w *widgetBase) SetPosition(x, y int) {
	w.x = x
	w.y = y
}

func (w *widgetBase) GetPosition() (int, int) {
	return w.x, w.y
}

func (w *widgetBase) GetOffset() (int, int) {
	return w.offsetX, w.offsetY
}

// SetScreenPos sets the screen position
func (w *widgetBase) SetScreenPos(x, y int) {
	w.Sx, w.Sy = x, y
}

// ScreenPos returns the screen position
func (w *widgetBase) ScreenPos() (x, y int) {
	return w.Sx, w.Sy
}

func (w *widgetBase) setOffset(x, y int) {
	w.offsetX = x
	w.offsetY = y
}

func (w *widgetBase) SetLayer(layer int) {
	w.layer = layer
}

func (w *widgetBase) SetVisible(visible bool) {
	w.visible = visible
}

func (w *widgetBase) SetExpanding(expanding bool) {
	w.expanding = expanding
}

func (w *widgetBase) SetMouseEnterHandler(handler MouseMoveHandler) {
	w.mouseEnterHandler = handler
}

func (w *widgetBase) SetMouseLeaveHandler(handler MouseMoveHandler) {
	w.mouseLeaveHandler = handler
}

func (w *widgetBase) SetMouseClickHandler(handler MouseHandler) {
	w.mouseClickHandler = handler
}

func (w *widgetBase) getPosition() (int, int) {
	return w.x, w.y
}

func (w *widgetBase) getSize() (int, int) {
	return 0, 0
}

func (w *widgetBase) getLayer() int {
	return w.layer
}

func (w *widgetBase) isVisible() bool {
	return w.visible
}

func (w *widgetBase) isExpanding() bool {
	return w.expanding
}

func (w *widgetBase) render(target d2interface.Surface) error {
	return nil
}

func (w *widgetBase) advance(elapsed float64) error {
	return nil
}

func (w *widgetBase) onMouseEnter(event d2interface.MouseMoveEvent) bool {
	if w.mouseEnterHandler != nil {
		w.mouseEnterHandler(event)
	}

	return false
}

func (w *widgetBase) onMouseLeave(event d2interface.MouseMoveEvent) bool {
	if w.mouseLeaveHandler != nil {
		w.mouseLeaveHandler(event)
	}

	return false
}

func (w *widgetBase) onMouseButtonClick(event d2interface.MouseEvent) bool {
	if w.mouseClickHandler != nil {
		w.mouseClickHandler(event)
	}

	return false
}

func (w *widgetBase) onMouseMove(event d2interface.MouseMoveEvent) bool {
	return false
}

func (w *widgetBase) onMouseOver(event d2interface.MouseMoveEvent) bool {
	return false
}

func (w *widgetBase) onMouseButtonDown(event d2interface.MouseEvent) bool {
	return false
}

func (w *widgetBase) onMouseButtonUp(event d2interface.MouseEvent) bool {
	return false
}