extends Node3D

const WallCornerScene = preload ("../room/wall_corner.tscn")
const WallEdgeScene = preload ("../room/wall_edge.tscn")

var editing_door = null

var room1 = null
var room2 = null
var room1_corner1 = null
var room1_corner2 = null
var room2_corner1 = null
var room2_corner2 = null

@onready var ray_cast = $RayCast3D

func _ready():
	pass

func is_editing():
	return editing_door != null

func is_valid():
	return room1 != null&&room2 != null&&room1_corner1 != null&&room1_corner2 != null&&room2_corner1 != null&&room2_corner2 != null

func edit(door):
	editing_door = door

	for room in House.body.get_rooms(0):
		if door != null:
			room.get_node("WallCollision/Clickable").on_click.connect(_add_corner.bind(room))
		else:
			room.get_node("WallCollision/Clickable").on_click.disconnect(_add_corner.bind(room))

func discard():
	pass

func save():
	pass

func _add_corner(event: EventPointer, room):
	_match_connected_room(event.ray.get_collision_point(), event.ray.get_collision_normal() * - 1)

	if room1_corner1 == null:
		if ray_cast.get_collider() == null:
			EventSystem.notify("Could not find connected room", EventNotify.Type.WARNING)
			return

		var connected_room = ray_cast.get_collider().get_parent()

		room1 = room
		room2 = connected_room

		room1_corner1 = WallCornerScene.instantiate()
		room1_corner1.global_position = event.ray.get_collision_point()
		room1_corner1.get_node("Clickable").on_grab_move.connect(_move_corner.bind(room, room1_corner1))
		add_child(room1_corner1)

		room2_corner1 = WallCornerScene.instantiate()
		room2_corner1.global_position = ray_cast.get_collision_point()
		room2_corner1.get_node("Clickable").on_grab_move.connect(_move_corner.bind(connected_room, room2_corner1))
		add_child(room2_corner1)
		
	elif room1_corner2 == null:
		if ray_cast.get_collider() == null:
			EventSystem.notify("Could not find connected room", EventNotify.Type.WARNING)
			return

		if room1 != room:
			EventSystem.notify("2nd corner must be in the same room", EventNotify.Type.WARNING)
			return

		var connected_room = ray_cast.get_collider().get_parent()

		if room2 != connected_room:
			EventSystem.notify("Connected rooms do not match", EventNotify.Type.WARNING)
			return

		room1_corner2 = WallCornerScene.instantiate()
		room1_corner2.global_position = event.ray.get_collision_point()
		room1_corner2.get_node("Clickable").on_grab_move.connect(_move_corner.bind(room, room1_corner2))
		add_child(room1_corner2)

		room2_corner2 = WallCornerScene.instantiate()
		room2_corner2.global_position = ray_cast.get_collision_point()
		room2_corner2.get_node("Clickable").on_grab_move.connect(_move_corner.bind(connected_room, room2_corner2))
		add_child(room2_corner2)

func _move_corner(event: EventPointer, room, corner):
	_match_room(event.ray.global_position, event.ray.to_global(event.ray.target_position) - event.ray.global_position)

	if ray_cast.get_collider() == null||ray_cast.get_collider().get_parent() != room:
		return

	var collision_point = ray_cast.get_collision_point()
	
	_match_connected_room(collision_point, ray_cast.get_collision_normal() * - 1)

	var connected_collision_point = ray_cast.get_collision_point()
	
	if ray_cast.get_collider() == null||ray_cast.get_collider().get_parent() != _get_connected_room(room):
		return

	corner.global_position = collision_point
	_get_connected_corner(corner).global_position = connected_collision_point

func _get_connected_room(room):
	return room1 if room == room2 else room2

func _get_connected_corner(corner):
	match corner:
		room1_corner1:
			return room2_corner1
		room1_corner2:
			return room2_corner2
		room2_corner1:
			return room1_corner1
		room2_corner2:
			return room1_corner2

func _match_room(pos: Vector3, dir: Vector3):
	ray_cast.global_position = pos
	ray_cast.target_position = dir.normalized() * 1000
	ray_cast.force_raycast_update()

func _match_connected_room(pos: Vector3, dir: Vector3):
	ray_cast.global_position = pos
	ray_cast.target_position = dir.normalized() * 1000
	ray_cast.force_raycast_update()