extends Node3D
class_name Place

var tile_grid_size: int = 32

var load_tile = preload("res://tiles/base_tile/base_tile.tscn")
var load_room = preload("res://places/base_place/base_room.tscn")
var load_door = preload("res://tiles/base_tile/base_door.tscn")
var load_actor = preload("res://actors/base_actor/base_actor.tscn")

#Contains all tiles in a workplace.
var lookup_place_to_tile: Dictionary = {}
#Contains all rooms in a workplace.
var lookup_place_to_room: Array = []



#Contains the tiles in the current selection drag
var selection_drag_dict: Dictionary = {}

#Contains all the tiles that have been selected in the current build
var selection_dict: Dictionary = {}

#Tracks the previous amount of tiles counted in a selection drac
var tile_count_x_hist: int = 0
var tile_count_z_hist: int = 0

#Tracks is confirming a build is allowed
var build_confirm_allowed: bool = true

var current_object: Object = null
var current_placement: Array = []

#Tracks parts of the room currently being built
var current_room: Object = null

func save():
	var save_data = {
#	Basics
		"id": self.get_instance_id(),
		"type": "Place",
		"scene_file_path": scene_file_path,
		"parent": get_parent().get_path(),
#	Connections
#	Data
	}
	return save_data

func init_grid():
#TEMP: Sets up a simple 2D grid of blank tiles.

	for x in range(tile_grid_size):
		for z in range (tile_grid_size):
			var pos = Vector3i(x, 0, z)
			var tile: Object = load_tile.instantiate()
			
			tile.set_position(pos)
			tile.grid_pos = pos
			tile.name = str("Tile", tile.get_instance_id())
			tile.place_id = self.get_instance_id()
			tile.selection_mode = Tile.SEL_MODE.NONE
			tile.construction_mode = Tile.CON_MODE.CLOSED
			
			$TileContainer.add_child(tile)

func draw_tile_click(click_pos):
#starts a selection drag
	
	var build_start_pos: Vector3i = click_pos.floor()
	
	if lookup_place_to_tile.has(build_start_pos):
		if not lookup_place_to_tile[build_start_pos].construction_mode == Tile.CON_MODE.BUILT:
			select_tile(build_start_pos)

func init_select_drag(float_build_start_pos, float_build_mouse_pos):
#Creats an array of dragged tiles between mouse start and current position
	
	var select_drag_array: Array = []
	
	var build_start_pos: Vector3i = float_build_start_pos.floor()
	var build_mouse_pos: Vector3i = float_build_mouse_pos.floor()

	var tile_count_x: int = build_mouse_pos.x - build_start_pos.x
	var tile_count_z: int = build_mouse_pos.z - build_start_pos.z
	
	if not tile_count_x_hist == tile_count_x or not tile_count_z_hist == tile_count_z:
		
		tile_count_x_hist = tile_count_x
		tile_count_z_hist = tile_count_z
		 
		for x in range(min(0, tile_count_x), max(0, tile_count_x) + 1):
			for z in range(min(0, tile_count_z), max(0, tile_count_z) + 1):
				var select_drag_pos: Vector3i = build_start_pos + Vector3i(x, 0, z)
				if lookup_place_to_tile.has(select_drag_pos):
					if not lookup_place_to_tile[select_drag_pos].construction_mode == Tile.CON_MODE.BUILT:
						select_drag_array.append(select_drag_pos)
		
		if select_drag_array:
			draw_select_drag(select_drag_array)

func draw_select_drag(array):
#Clears previous drag, then calls tile selection on all currently dragged tiles

	for i in lookup_place_to_tile:
		if not selection_dict.has(i):
			var tile: Object = lookup_place_to_tile[i]
			tile.selection_mode = Tile.SEL_MODE.NONE
				
	selection_drag_dict.clear()
	
	for i in array:
		select_tile(i)

func select_tile(pos):
#Tells tiles to be selected

	var tile: Object = lookup_place_to_tile[pos]
	
	selection_drag_dict[pos] = tile
	
	if build_confirm_allowed:
		tile.selection_mode = Tile.SEL_MODE.BUILD
	else:
		tile.selection_mode = Tile.SEL_MODE.INVALID

func verify_room():
#Verifies that a given selection is fully contiguous
	
	var verify_array: Array = selection_dict.keys()
	var verify_queue_array: Array = [verify_array[0]]
	var verify_checked_array: Array = []

	while verify_array:
		if not verify_queue_array:

			return false

		var verify_pos: Vector3i = verify_queue_array.pop_back()
		
		var verify_neighbor_array: Array = lookup_place_to_tile[verify_pos].direction_vector_dict.values()
		
		for n in verify_neighbor_array:
		
			if selection_dict.has(verify_pos + n):
				if not verify_checked_array.has(verify_pos + n):
					if not verify_queue_array.has(verify_pos + n):
						verify_queue_array.append(verify_pos + n)

		verify_checked_array.append(verify_pos)
		verify_array.erase(verify_pos)
	
	return true

func end_select_drag():
#Adds dragged tiles to the current selection on mouse-up
	if not selection_drag_dict:
		return
	
	tile_count_x_hist = 0
	tile_count_z_hist = 0

	selection_dict.merge(selection_drag_dict)
	
	if verify_room():
		build_confirm_allowed = true
		for i in selection_dict:
			lookup_place_to_tile[i].selection_mode = Tile.SEL_MODE.BUILD
	else:
		build_confirm_allowed = false
		for i in selection_dict:
			lookup_place_to_tile[i].selection_mode = Tile.SEL_MODE.INVALID
			
	selection_drag_dict.clear()

func build_selection():
#When the build button is clicked, changes the selected tiles to match the button's request

	if not build_confirm_allowed:
		return
	
	if selection_dict:
		
		var room: Object = create_room(selection_dict)
		
		for i in selection_dict:
			var tile: Object = lookup_place_to_tile[i]
			tile.selection_mode = Tile.SEL_MODE.NONE
			tile.construction_mode = Tile.CON_MODE.BUILT
		
		selection_dict.clear()
		
		return room

func clear_selection():
#When the clear button is clicked, it clears the selected tiles without doing anything.

	for i in selection_dict:
		var tile: Object = selection_dict[i]
		tile.selection_mode = Tile.SEL_MODE.NONE
		build_confirm_allowed = true

	selection_dict.clear()




func create_room(selection):
#Creates a room from the selected tiles.

	var room: Object = load_room.instantiate()
	
	room.position = (selection.keys().min())
	
	room.room_to_tile = selection.values()
	room.place_id = self.get_instance_id()
	
	room.name = str("Room", room.get_instance_id())
	
	$RoomContainer.add_child(room)
	
	for i in room.room_to_tile:
		i.lookup_tile_to_room.append(room)
	
	lookup_place_to_room.append(room)
	
	return room




func init_object(object):
	
	match object: 
		"door":
			var door: Object = load_door.instantiate()
			
			init_object_locations(door)
			
			door.place_id = self.get_instance_id()
			door.visible = false
			
			$ObjectContainer.add_child(door)
			
			current_object = door
			
		"actor":
			var actor: Actor = load_actor.instantiate()
			
			current_object = actor
			
			actor.visible = false
			
			$ActorContainer.add_child(actor)
			
		
	

func init_object_locations(object):
	
	match object.placement:
		GameObject.PLACEMENTS.DOOR:

			for i in lookup_place_to_tile.keys():
				for j in lookup_place_to_tile[i].face_dict.keys():
					if lookup_place_to_tile[i].face_dict[j] is not Door:
						current_placement.append((Vector3(i) + Vector3(0.5, 0, 0.5)) + Vector3(j) / 2)

func hover_object(mouse_pos):
#Hovers the door at the closest wall segment to the mouse in the current room
	
	current_object.visible = true
	
	if current_placement:
		var closest: Vector3
		var closest_distance: float = INF

		for i in current_placement:
			var distance: float = mouse_pos.distance_to(i)
			if closest_distance > distance:
				closest_distance = distance
				closest = i
		
		current_object.position = closest
		current_object.rotation_degrees = Vector3(0, 180 * fmod(closest.x, 1), 0)
		
	else:
		current_object.position = mouse_pos

func confirm_object():
	
	var check = current_object.get_class()
	if current_object is Door:
		
		var tile_1: Object
		var tile_2: Object

		if fmod(current_object.position.x, 1) == 0:
			tile_1 = lookup_place_to_tile[Vector3i(current_object.position.x, 0, current_object.position.z)]
			tile_2 = lookup_place_to_tile[Vector3i(current_object.position.x - 1, 0, current_object.position.z)]
		else:
			tile_1 = lookup_place_to_tile[Vector3i(current_object.position.x, 0, current_object.position.z)]
			tile_2 = lookup_place_to_tile[Vector3i(current_object.position.x, 0, current_object.position.z - 1)]
		
		var tile_1_new_dict = tile_1.face_dict.duplicate()
		var tile_2_new_dict = tile_2.face_dict.duplicate()
		
		var tile_1_door_face: Vector3i = tile_2.position - tile_1.position
		
		tile_1_new_dict[tile_1_door_face] = current_object
		
		tile_1.update_faces(tile_1_new_dict)
		
		tile_1.lookup_tile_to_room[0].room_to_door.append(current_object)
		
		var tile_2_door_face: Vector3i = tile_1.position - tile_2.position
		
		tile_2_new_dict[tile_2_door_face] = current_object
		
		tile_2.update_faces(tile_2_new_dict)
		
		tile_2.lookup_tile_to_room[0].room_to_door.append(current_object)
		
		current_object.lookup_door_to_room.append(tile_1.lookup_tile_to_room[0])
		current_object.lookup_door_to_room.append(tile_2.lookup_tile_to_room[0])
		current_object.lookup_door_to_tile[tile_1] = tile_1_door_face
		current_object.lookup_door_to_tile[tile_2] = tile_2_door_face
	
	elif current_object is Actor:
		current_object.actor_state = Actor.ACTOR_STATE.ACTIVE
	
	current_room = null
	current_placement = []
	current_object = null

func give_neighbors(tile, grid_pos, directions):
	var neighbor_dict = {}
	for i in directions.keys():
		if lookup_place_to_tile.has(directions[i] + grid_pos):
			neighbor_dict[directions[i]] = lookup_place_to_tile[directions[i] + grid_pos]
	tile.neighbor_dict = neighbor_dict

func _on_tile_container_child_entered_tree(node: Node) -> void:
	lookup_place_to_tile[node.grid_pos] = node
	node.connect("neighbor_request", give_neighbors)

func give_tile(actor):
	
	var closest: Vector3
	var closest_distance: float = INF
	
	for i in lookup_place_to_tile:
		var distance: float = actor.position.distance_to(i)
		if closest_distance > distance:
			closest_distance = distance
			closest = i
	
	actor.current_tile = lookup_place_to_tile[Vector3i(closest)]

func _on_actor_container_child_entered_tree(node: Node) -> void:
	node.connect("current_tile_request", give_tile)