package gameobjects

import (
	"github.com/faiface/pixel"
	"github.com/faiface/pixel/pixelgl"
)

type Animate struct {
	//PlayerVec pixel.Vec
	Sprite   *pixel.Sprite
	Up       []pixel.Rect
	Down     []pixel.Rect
	Left     []pixel.Rect
	Right    []pixel.Rect
	Idle     bool
	Dir      int
	Frame    int
	Current  []pixel.Rect
	SprSheet pixel.Picture
	Speed 	 int64
}

func NewAnimation(spriteSheet pixel.Picture, sprFrames []pixel.Rect) Animate {
	var animation Animate
	for i := 0; i < 3; i++ {
		animation.Up = append(animation.Up, sprFrames[i])
	}
	for i := 3; i < 6; i++ {
		animation.Right = append(animation.Right, sprFrames[i])
	}
	for i := 6; i < 9; i++ {
		animation.Left = append(animation.Left, sprFrames[i])
	}
	for i := 9; i < 12; i++ {
		animation.Down = append(animation.Down, sprFrames[i])
	}

	animation.Current = animation.Down
	animation.SprSheet = spriteSheet
	animation.Sprite = pixel.NewSprite(spriteSheet, animation.Current[0])
	animation.Frame = 0
	animation.Idle = false
	animation.Speed = 6
	return animation
}

var elapsedTime int64 = 0

func (a *Animate) Update(dt int64) {
	var direction int = a.Dir
	switch direction {
	case 0:
		a.Current = a.Up
	case 1:
		a.Current = a.Down
	case 2:
		a.Current = a.Left
	case 3:
		a.Current = a.Right
	}
	elapsedTime += dt
	if elapsedTime >= 1000000000/ a.Speed{
		a.Frame++
		elapsedTime -= 1000000000 / a.Speed
	}
	if a.Frame >= 3 {
		a.Frame = 0
	}
	if a.Idle {
		a.Frame = 0
	}
	a.Sprite.Set(a.SprSheet, a.Current[a.Frame])
}

func (a *Animate) Render(win *pixelgl.Window, pVec pixel.Vec) {
	a.Sprite.Draw(win, pixel.IM.Scaled(pixel.ZV, 4).Moved(pVec))

}