extends Node2D

class_name Inventory

var inventory : Array[Array]

func _ready():
	for i in range(5):
		inventory.append([])
		for j in range(5):
			inventory[i].append(true)
	update_tiles()
	
func _process(delta) -> void:
	if Input.is_action_just_released("select"):
		if Globals.selected_item is Item:
			remove_item(Globals.selected_item)
			var item_head_position = global_to_inventory(Globals.selected_item.get_head_position())
			insert_item(Globals.selected_item, item_head_position)

func remove_item(item : Item):
	for y in range(len(inventory)):
		for x in range(len(inventory[0])):
			if inventory[y][x] is not Item: continue
			if inventory[y][x] == item:
				inventory[y][x] = true

func insert_item(item : Item, at : Vector2i):
	var fits = true
	
	if len(item.shape) + at.y > len(inventory) or len(item.shape[0]) + at.x > len(inventory[0]) or at.x < 0 or at.y < 0: fits = false
	
	if fits:
		for y in range(len(item.shape)):
			for x in range(len(item.shape[0])):
				if (inventory[y+at.y][x+at.x] is not bool or inventory[y+at.y][x+at.x] == false) and item.shape[y][x]: fits = false
	
	if not fits: 
		item.move_away()
		return
	
	item.position = Vector2(at.x + float(len(item.shape[0]))/2, at.y + float(len(item.shape))/2) * Globals.tilesize

	for y in range(len(item.shape)):
		for x in range(len(item.shape[0])):
			if item.shape[y][x]:
				inventory[y+at.y][x+at.x] = item
		
func global_to_inventory(location : Vector2) -> Vector2:
	location -= global_position
	var new_location : Vector2i = Vector2i(location/Globals.tilesize)
	return new_location
	
func update_tiles():
	%InventoryTiles.clear()
	for y in range(len(inventory)):
		for x in range(len(inventory[0])):
			if inventory[y][x]:
				%InventoryTiles.set_cell(Vector2i(x,y),0,Vector2i(0,0))