class_name World
extends Node2D

const tile_size: int = 16

# Переменная для хранения ссылки на TileMap
@onready var ground: TileMapLayer = $TileMap/ground
@onready var tileMap: Node2D = $TileMap

const SELECTION_SCENE = preload("res://UI/selection/selection.tscn")

var selected_instrument: instruments
var selected_tile: Vector2i
var selected_tile2: Vector2i
var selected: bool
var selected2: bool
var selection: Node
var selection2: Node
var lmb: bool
var rmb: bool

func _ready():
	Engine.physics_ticks_per_second = 60
	selection = SELECTION_SCENE.instantiate()
	selection2 = SELECTION_SCENE.instantiate()
	add_child(selection)
	add_child(selection2)
	change_instrument(instruments.NULL)

enum instruments {
	NULL,
	DESTROY,
	CONSTRUCT,
	BUILD_ROAD
}

func select_tile(pos: Vector2i) -> Vector2i:
	var toplayer: TileMapLayer = tileMap.get_toplayer(pos)
	var tiledata: TileData = toplayer.get_cell_tile_data(pos)
	if tiledata == null: return pos
	
	while tiledata.get_custom_data("center_direction") != Vector2i.ZERO:
		pos+=tiledata.get_custom_data("center_direction")
		tiledata = toplayer.get_cell_tile_data(pos)
	return pos

func _physics_process(delta: float) -> void:
	if Input.is_action_just_released("left_mouse") and lmb:
		selected_tile = select_tile(ground.local_to_map(get_global_mouse_position()-tileMap.global_position))
		selected = true
		if(selected_tile==selected_tile2):
			selected_tile2 = Vector2i(-128,-128)
			selected2 = false
		print(tileMap.is_walkable(selected_tile))
	if Input.is_action_just_released("right_mouse") and rmb:
		selected_tile2 = select_tile(ground.local_to_map(get_global_mouse_position()-tileMap.global_position))
		if(selected_tile!=selected_tile2): selected2 = true
		else:
			selected_tile2 = Vector2i(-128,-128)
			selected2 = false

	if Input.is_action_just_pressed("ui_cancel"):
		change_instrument(instruments.NULL)
	
	match selected_instrument:
		instruments.NULL:
			pass
		instruments.DESTROY:
			if Input.is_action_just_pressed("ui_accept") and selected:
				tileMap.destroy_building(selected_tile)
		instruments.CONSTRUCT:
			if Input.is_action_just_pressed("ui_accept") and selected and selected2:
				tileMap.place_way(selected_tile, selected_tile2)
			elif Input.is_action_just_pressed("ui_accept") and selected:
				tileMap.place_struct(selected_tile, tileMap.StructType.EMPTY_ROOM)
		instruments.BUILD_ROAD:
			selected_tile = ground.local_to_map(get_global_mouse_position()-tileMap.global_position)
			if Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT):
				tileMap.place_road(selected_tile)
			elif Input.is_mouse_button_pressed(MOUSE_BUTTON_RIGHT):
				tileMap.erase_road(selected_tile)
	selection.offset = ground.map_to_local(selected_tile)+tileMap.global_position
	selection2.offset = ground.map_to_local(selected_tile2)+tileMap.global_position

func change_instrument(new: instruments):
	selected_tile = Vector2i(-128, -128)
	selected_tile2 = Vector2i(-128, -128)
	selected = false
	selected2 = false
	selected_instrument = new
	
	match selected_instrument:
		instruments.NULL:
			lmb = true
			rmb = false
		instruments.DESTROY:
			lmb = true
			rmb = false
		instruments.CONSTRUCT:
			lmb = true
			rmb = true
		instruments.BUILD_ROAD:
			lmb = false
			rmb = false

func _process(delta: float) -> void:
	if Input.is_action_pressed("ui_right"):
		$Camera2D.translate(Vector2.RIGHT*320*delta/$Camera2D.zoom)
	if Input.is_action_pressed("ui_left"):
		$Camera2D.translate(Vector2.LEFT*320*delta/$Camera2D.zoom)
	if Input.is_action_pressed("ui_up"):
		$Camera2D.translate(Vector2.UP*320*delta/$Camera2D.zoom)
	if Input.is_action_pressed("ui_down"):
		$Camera2D.translate(Vector2.DOWN*320*delta/$Camera2D.zoom)
	if Input.is_action_just_pressed("zoom_in"):
		$Camera2D.zoom+=Vector2.ONE*0.25
	if Input.is_action_just_pressed("zoom_out"):
		$Camera2D.zoom-=Vector2.ONE*0.25