extends Node2D

class_name Level

class Spawn:
	var delay : float
	var enemy : Enemy
	func _init(delay : float, enemy : Enemy):
		self.delay = delay
		self.enemy = enemy

@export var spawn_points : Array[Marker2D]
@export var levels : Array[TileMapLayer]
@export var enemies : Array[PackedScene]

@onready var areas = [$Top,$Right,$Bottom,$Left]

@onready var borders = [$"World Border/Top",$"World Border/Right",$"World Border/Bottom",$"World Border/Left"]

@export var player : CharacterBody2D

@onready var shop = $Shop

var difficulty = 4

var levels_until_shop = 1

var last_direction = null

var enemies_alive = true

func _ready() -> void:
	for level in levels:
		level.enabled = false
		level.navigation_enabled = false
	
	var level = levels.pick_random()
	level.enabled = true
	level.navigation_enabled = true
	
	make_spawns()
	
func _process(delta: float) -> void:
	if Engine.get_process_frames() % 10 == 0:
		if get_tree().get_nodes_in_group("enemy") != []:
			enemies_alive = true
		else:
			var currently_alive = false
			for spawn in spawn_points:
				if spawn.spawns != []:
					currently_alive = true
					break
			enemies_alive = currently_alive
		
	for i in range(4):
		if not enemies_alive and last_direction != i:
			borders[i].set_deferred("disabled",true)
		else:
			borders[i].set_deferred("disabled",false)
		if last_direction == i:
			areas[i].show()
		else:
			areas[i].hide()

func make_spawns():
	for spawn_point in spawn_points:
		spawn_point.spawns.clear()
	
	var difficulty_left = difficulty
	while difficulty_left > 0:
		var direction = randi_range(0,3)
		while direction == last_direction:
			direction = randi_range(0,3)
		var enemy = enemies.pick_random().instantiate()
		var delay = 100*(1/(difficulty+100))
		enemy.speed *= 1 + (difficulty/100)
		enemy.health *= 1 + (difficulty/100)
		spawn_points[direction].add_spawn(Spawn.new(delay,enemy))
		difficulty_left -= enemy.difficulty

func change_level():
	if player.inventory.in_shop:
		shop.stop()
		player.inventory.in_shop = false
	player.score += 20
	player.inventory.update_stats()
	difficulty += 2
	for level in levels:
		level.enabled = false
		level.navigation_enabled = false
	
	levels_until_shop -= 1
	if levels_until_shop <= 0:
		shop.start()
		player.inventory.in_shop = true
		levels_until_shop = 3
		return
	
	var level = levels.pick_random()
	level.enabled = true
	level.navigation_enabled = true
	
	make_spawns()
	


func _on_top_body_entered(body: Node2D) -> void:
	if not body is Player:
		return
	last_direction = 2
	print("top")
	change_level()
	player.position = Vector2(128,256-player.scale.x*32)
	
	


func _on_bottom_body_entered(body: Node2D) -> void:
	if not body is Player:
		return
	last_direction = 0
	change_level()
	print("bottom")
	player.position = Vector2(128,0+player.scale.x*32)
	


func _on_left_body_entered(body: Node2D) -> void:
	if not body is Player:
		return
	last_direction = 1
	change_level()
	print("left")
	player.position = Vector2(256-player.scale.x*32,128)
	
	


func _on_right_body_entered(body: Node2D) -> void:
	if not body is Player:
		return
	last_direction = 3
	change_level()
	print("right")
	player.position = Vector2(0+player.scale.x*32,128)