package elements

import (
	"context"

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

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

const (
	ParentKey = "parent_element"
	ZeroKey   = "zero"
)

type Mouseable interface {
	HandleMouseMove(ctx context.Context, s MouseState) error
	HandleMouseDown(ctx context.Context, s MouseState) error
	HandleMouseUp(ctx context.Context, s MouseState) error
}

type Element interface {
	Draw(ctx context.Context, image *ebiten.Image) error
	Size() (w, h int32)
}

func GetZero(ctx context.Context) (x, y int32) {
	if v, ok := ctx.Value(ZeroKey).([2]int32); ok {
		return v[0], v[1]
	}
	return 0, 0
}

func GetParent(ctx context.Context) Element {
	if e, ok := ctx.Value(ParentKey).(Element); ok {
		return e
	}
	return nil
}