extends Node3D

var load_tile = preload("res://tiles/base_tile/tile.tscn")

var tile_drag_dict = {}
var tile_drag_array_global = []

var tile_count_x_hist = null
var tile_count_z_hist = null

var tile_drag_x_hist = null
var tile_drag_z_hist = null

func _ready():
	pass

func clear_build_drag():
	tile_count_x_hist = 0
	tile_count_z_hist = 0
	
	tile_drag_x_hist = 0
	tile_drag_z_hist = 0
	
	for i in tile_drag_dict:
		var tile = tile_drag_dict[i]
		tile.queue_free()
	
	tile_drag_dict.clear()
	
func draw_tile_click(start_pos):
	
	var build_start_pos: Vector3i = start_pos.snapped(Vector3i(1, 1, 1))
	tile_drag_x_hist = 0
	tile_drag_z_hist = 0
	
	var tile = load_tile.instantiate()
			
	tile.position = build_start_pos

	tile_drag_dict[build_start_pos] = tile
	
	add_child(tile)

func init_tile_drag(float_build_start_pos, float_build_mouse_pos):
	
	var tile_drag_array = []
	
	var build_start_pos: Vector3i = float_build_start_pos.snapped(Vector3i(1.0, 1.0, 1.0))
	var build_mouse_pos: Vector3i = float_build_mouse_pos.snapped(Vector3i(1.0, 1.0, 1.0))

	var tile_count_x = build_mouse_pos.x - build_start_pos.x
	var tile_count_z = 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:
		var tile_count_x_diff = tile_count_x_hist - tile_count_x
		var tile_count_z_diff = 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 tile_drag_pos = build_start_pos + Vector3i(x, 0, z)
				
				tile_drag_array.append(tile_drag_pos)

		draw_tile_drag(tile_drag_array)



func draw_tile_drag(array):

	tile_drag_dict.clear()

	for i in self.get_children():
		i.queue_free()
				
	for i in array:
	
		var id = i
			
		if not tile_drag_dict.has(id):
			var tile = load_tile.instantiate()
			
			tile.position = i
			
			tile_drag_dict[id] = tile
			
			add_child(tile)

	#tile_drag_x_hist = x_diff + tile_drag_x_hist
	#tile_drag_z_hist = z_diff + tile_drag_z_hist
	#
	#if x_diff:
		#for z in range(min(0, tile_drag_z_hist), max(0, tile_drag_z_hist) + 1):
			#for x in abs(x_diff):
				#var id = Vector3i(start_pos.x - tile_drag_x_hist, 0, start_pos.z - z)
				##var lastid = Vector3i(start_pos.x - tile_drag_x_hist - x_diff, 0, start_pos.z - z)
				#if tile_drag_dict.has(id):
					#var tile = tile_drag_dict[id]
					#tile.queue_free()
					#tile_drag_dict.erase(id)
				#else:
#
					#var tile = load_tile.instantiate()
					#tile.position = id
					#tile_drag_dict[id] = tile
					#add_child(tile)
				#
	#if z_diff:
		#for x in range(min(0, tile_drag_x_hist), max(0, tile_drag_x_hist) + 1):
			#for z in abs(z_diff):
				#var id = Vector3i(start_pos.x - x, 0, start_pos.z - tile_drag_z_hist)
#
				#if tile_drag_dict.has(id):
					#var tile = tile_drag_dict[id]
					#tile.queue_free()
					#tile_drag_dict.erase(id)
				#else:
					#var tile = load_tile.instantiate()
					#tile.position = id
					#tile_drag_dict[id] = tile
					#add_child(tile)
					
	#print(tile_drag_dict)
				#if x_diff > 0:
					#var tile = load_tile.instantiate()
					#tile.position = Vector3i(start_pos.x - tile_drag_x_hist, 0, tile_drag_z_hist - z)
					#
					#print(Vector3i(start_pos.x - tile_drag_x_hist, 0, tile_drag_z_hist - z))
					#tile_drag_dict[tile.position] = tile
				#
					#add_child(tile)
					#
				#if x_diff < 0:
					#print(Vector3i(start_pos.x - tile_drag_x_hist, 0, tile_drag_z_hist - z))
		

		
	
	#print(tile_drag_z_hist)
	
	

# order of events:
# get start and current mouse pos
# check for changes in drag grid dimension
# if changes, send to gird draw func
# add/remove tiles along each changed dimension

	#var tile_x_diff = null
	#var tile_z_diff = null
#

	#

	#
	#if tile_count_x_hist == null:
		#tile_x_diff = 0
	#else:
		#tile_x_diff = tile_count_x_hist - tile_count_x
		#
	#tile_count_x_hist = tile_x_diff
	##print(tile_count_x_hist)
	#
	#if not tile_count_z_hist:
		#tile_z_diff = 0
	#else:
		#tile_z_diff = tile_count_z_hist - tile_count_z
	#
	#if tile_x_diff or tile_z_diff:
		#draw_tile_drag(tile_x_diff, tile_z_diff, build_start_pos)
		#tile_count_x_hist = tile_count_x
		#tile_count_z_hist = tile_count_z
	
	#var tile_drag_array = []
	#var tile_count_x_array = [0]
	#var tile_count_z_array = [0]
	#
	#var tile_count_x = build_mouse_pos.x - build_start_pos.x
	#var tile_count_z = build_mouse_pos.z - build_start_pos.z
	
	#if tile_count_x < 0:
		#tile_count_x_array.append_array(range(-1, tile_count_x - 1, -1))
		#tile_count_x_array.reverse()
#
	#if tile_count_x > 0:
		#tile_count_x_array.append_array(range(1, tile_count_x + 1))
		#
	#if tile_count_z < 0:
		#tile_count_z_array.append_array(range(-1, tile_count_z - 1, -1))
		#tile_count_z_array.reverse()
#
	#if tile_count_z > 0:
		#tile_count_z_array.append_array(range(1, tile_count_z + 1))
		
	#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 tile_drag_pos = build_start_pos + Vector3i(x, 0, z)
			#
			#tile_drag_array.append(tile_drag_pos)
		
	#for x in tile_count_x_array:
		#for z in tile_count_z_array:
			#
	#print(tile_drag_array)

#func draw_tile_drag(x_diff, z_diff, start_pos):
	
	#print(x_diff, " ", z_diff)
	
	#i
	#
	#tile.position = i
	#
	#tile_drag_dict[i] = tile
		
	pass
	#print(x_diff, " ", z_diff)
	
	#for i in self.get_children():
			#i.queue_free()
			
	#for i in array:
	#
		#var id = i
			#
		#if not tile_drag_dict.has(id):
			#var tile = load_tile.instantiate()
			#
			#tile.position = i
			#
			#tile_drag_dict[id] = tile
			#
			#add_child(tile)