package animation

import (
	"math/rand"

	"git.wisellama.rocks/Project-Ely/project-ely/internal/sprite"
	rl "github.com/gen2brain/raylib-go/raylib"
)

const (
	PenguinDefault = PenguinStationaryRight
)

var penguinAnimations []int

func DefinePenguinAnimations() {
	filename := sprite.DelilahWalking

	penguinAnimations = make([]int, 0)
	penguinAnimations = append(penguinAnimations, PenguinWalkRight)
	penguinAnimations = append(penguinAnimations, PenguinWalkLeft)
	penguinAnimations = append(penguinAnimations, PenguinWalkUp)
	penguinAnimations = append(penguinAnimations, PenguinWalkDown)
	penguinAnimations = append(penguinAnimations, PenguinStationaryRight)
	penguinAnimations = append(penguinAnimations, PenguinStationaryLeft)
	penguinAnimations = append(penguinAnimations, PenguinStationaryUp)
	penguinAnimations = append(penguinAnimations, PenguinStationaryDown)

	var (
		dimensions rl.Vector2
		offset     rl.Vector2
		center     rl.Vector2
		length     int
		speed      int
		border     int
	)

	dimensions = rl.Vector2{X: 13, Y: 17}

	// Walking Right is in the spritesheet.
	speed = 5
	offset = rl.Vector2{X: 0, Y: 1}
	length = 5
	border = 1                     // optional border around each sprite
	center = getCenter(dimensions) // center is for rotation, nil will default to w/2 h/2
	walkRight := sprite.NewAnimation(filename, dimensions, offset, length, border)
	AnimationMap[PenguinWalkRight] = NewEntityAnimation(walkRight, speed, length, 0, center, FlipNone)

	// Walking Left is just that flipped.
	AnimationMap[PenguinWalkLeft] = NewEntityAnimation(walkRight, speed, length, 0, center, FlipHorizontal)

	// Stationary Right/Left is just the first frame.
	length = 1
	stationaryRight := sprite.NewAnimation(filename, dimensions, offset, length, border)
	AnimationMap[PenguinStationaryRight] = NewEntityAnimation(stationaryRight, speed, length, 0, center, FlipNone)
	AnimationMap[PenguinStationaryLeft] = NewEntityAnimation(stationaryRight, speed, length, 0, center, FlipHorizontal)

	// Walk Up
	length = 4
	offset = rl.Vector2{X: 0, Y: 3}
	walkUp := sprite.NewAnimation(filename, dimensions, offset, length, border)
	AnimationMap[PenguinWalkUp] = NewEntityAnimation(walkUp, speed, length, 0, center, FlipNone)

	// Stationary Up
	length = 1
	stationaryUp := sprite.NewAnimation(filename, dimensions, offset, length, border)
	AnimationMap[PenguinStationaryUp] = NewEntityAnimation(stationaryUp, speed, length, 0, center, FlipNone)

	// Walk Down
	length = 4
	offset = rl.Vector2{X: 0, Y: 0}
	walkDown := sprite.NewAnimation(filename, dimensions, offset, length, border)
	AnimationMap[PenguinWalkDown] = NewEntityAnimation(walkDown, speed, length, 0, center, FlipNone)

	// Stationary Down
	length = 1
	stationaryDown := sprite.NewAnimation(filename, dimensions, offset, length, border)
	AnimationMap[PenguinStationaryDown] = NewEntityAnimation(stationaryDown, speed, length, 0, center, FlipNone)
}

func RandomPenguinAnimation() int {
	n := len(penguinAnimations)
	i := rand.Intn(n)
	return penguinAnimations[i]
}