extends Area2D
class_name Plant

const PLANT_AREA_WIDTH = 10
const PLANT_SPRITE_SCALE = 0.15

enum State {PLANTED, GROWING, MATURE}

@export var plant_type : PlantType
@export var planet : Planet

var state : State = State.PLANTED : set = change_state
var day : int = 0

@onready var plant_sprite : Sprite2D = generate_sprite()
@onready var collision_shape : CollisionShape2D = generate_collision_shape()

func _init(_plant_type = null, _planet = null):
	plant_type = _plant_type
	planet = _planet

func generate_sprite() -> Sprite2D:
	var sprite = Sprite2D.new()

	add_child(sprite)
	sprite.texture = get_state_texture(state)
	sprite.scale = Vector2.ONE * PLANT_SPRITE_SCALE
	sprite.offset

	return sprite

func generate_collision_shape() -> CollisionShape2D:
	var collision = CollisionShape2D.new()
	var shape = CircleShape2D.new()
	shape.radius = PLANT_AREA_WIDTH

	collision.shape = shape
	add_child(collision)

	return collision

func pass_day():
	day += 1
	if day > plant_type.growing_time:
		change_state(State.MATURE)
	else:
		change_state(State.GROWING)

func change_state(_state : State):
	state = _state
	plant_sprite.texture = get_state_texture(state)

	if state == State.MATURE and plant_type.mature_effect:
		plant_type.mature_effect.effect(self)

func get_state_texture(s : State) -> Texture2D:
	match s:
		State.PLANTED:
			return plant_type.planted_texture
		State.GROWING:
			return plant_type.growing_texture
		State.MATURE:
			return plant_type.mature_texture
	return null

func harvest():
	day += 1
	if day > plant_type.growing_time:
		change_state(State.MATURE)
	else:
		change_state(State.GROWING)