using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class CraftingSystem : MonoBehaviour
{
	#region Statication

	public static CraftingSystem instance;

	private void Awake()
	{
		if (instance != null && instance != this)
		{
			Destroy(gameObject);
			return;
		}
		DontDestroyOnLoad(this);
		instance = this;
	}

	#endregion
	public List<Item> knownCraftables = new();
	[Header("UI")] 
	public Transform craftableUIGrid;
	public CraftableUIObject templateCraftButton; 
	public void UpdateKnownCraftables(Item newCraftable)
	{
		knownCraftables.Add(newCraftable);
		CraftableUIObject newButton = Instantiate(templateCraftButton, craftableUIGrid);
		newButton.SetObject(newCraftable);
	}
	public bool TryCraftingItem(Item requestedItem)
	{
		List<InventoryManager.ItemAmount> missingItems = new();
		foreach (InventoryManager.ItemAmount requiredMaterial in requestedItem.requiredMaterials)
		{
			if (InventoryManager.instance.CheckItemAmount(requiredMaterial.item) < requiredMaterial.amount)
			{
				InventoryManager.ItemAmount newMissingItem = new();
				newMissingItem.item = requiredMaterial.item;
				newMissingItem.amount = requiredMaterial.amount - InventoryManager.instance.CheckItemAmount(requiredMaterial.item);
			}
		}
		if (missingItems.Count > 0)
		{
			return false; //supposed to return what items were missing
		}
		foreach (InventoryManager.ItemAmount requiredMaterial in requestedItem.requiredMaterials)
		{
			InventoryManager.instance.RemoveItem(requiredMaterial.item, requiredMaterial.amount);
		}
		InventoryManager.instance.AddItem(requestedItem, requestedItem.craftedAmount);
		return true;

	}
}