package animation

import (
	"github.com/veandco/go-sdl2/sdl"
)

type SpriteAnimation interface {
	Draw(frame int32, worldPosition *sdl.Point, angle float64, center *sdl.Point, flip sdl.RendererFlip) error
}

// An entityAnimation will take a SpriteAnimation and may manipulate it somehow (e.g. flipped for walking the other direction)
// This way you may cut down the actual number of pictures needed to define all the different animations.
type entityAnimation struct {
	spriteAnimation SpriteAnimation
	speed           int32
	length          int32
	angle           float64
	center          *sdl.Point
	flip            sdl.RendererFlip
}

func NewEntityAnimation(
	spriteAnimation SpriteAnimation,
	speed int32,
	length int32,
	angle float64,
	center *sdl.Point,
	flip sdl.RendererFlip,
) *entityAnimation {

	e := entityAnimation{
		spriteAnimation: spriteAnimation,
		speed:           speed,
		length:          length,
		angle:           angle,
		center:          center,
		flip:            flip,
	}

	return &e
}

func (e *entityAnimation) Draw(frame int32, windowPosition *sdl.Point) error {
	return e.spriteAnimation.Draw(frame, windowPosition, e.angle, e.center, e.flip)
}

func (e *entityAnimation) GetSpeed() int32 {
	return e.speed
}

func DefineAnimations() {
	DefinePenguinAnimations()
}