extends Sprite2D

class_name Tile

enum States {
	EMPTY,
	SNAKE,
	APPLE
}

@export var state : States
# 0 means no snake at all, 1 means head and the biger, the further it is from the head
@export var snake_pos := 0
@export var tile_color : TileColors

@export var x : int
@export var y : int

func _init(_x : int, _y : int, _texture : Texture2D, _tile_colors : TileColors):
	state = States.EMPTY
	self.x = _x
	self.y = _y
	self.texture = _texture
	self.tile_color = _tile_colors

func update_color():
	match state:
		States.EMPTY:
			self.modulate = tile_color.empty
		States.SNAKE:
			self.modulate = tile_color.snake_body if snake_pos > 1 else tile_color.snake_head
		States.APPLE:
			self.modulate = tile_color.apple
	pass
	
func calculate_tile_position_and_size(viewport_min : int, gaps : int, map_size: int, x : int, y : int):
	var tile_scale = ( viewport_min - gaps ) / map_size - gaps
	self.scale = Vector2(tile_scale, tile_scale)
	self.position = Vector2(x * ( tile_scale + gaps ) -  map_size / 2 * (tile_scale + gaps), y * (tile_scale + gaps)  -  map_size / 2 * (tile_scale + gaps))
	pass

func _process(delta):
	update_color()
	pass