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

public class Craft : MonoBehaviour
{
    public Item craftableItem;
    public TextMeshProUGUI craftableItemName;
    public Image craftableItemIcon;

    public bool isUnlocked;

    public List<Item> requiredItems = new List<Item>();
    public List<int> requiredAmount = new List<int>();

    List<Item> haveItems = new List<Item>();
    List<int> haveAmount = new List<int>();

    private bool canCraft = false;

    int usedAmount = 0;

    void Start()
    {
        craftableItemName.text = craftableItem.ItemName;
        craftableItemIcon.sprite = craftableItem.ItemIcon;
    }

    void Update()
    {
        GetComponent<Button>().interactable = isUnlocked;
    }

    public void CraftItem()
    {
        List<Item> inventoryItems = Inventory.instance.items;
        for (int i = 0; i < requiredItems.Count; i++)
        {
            if (inventoryItems.Contains(requiredItems[i]))
            {
                if(haveItems.Count < requiredItems.Count)
                {
                    haveItems.Add(requiredItems[i]);
                    haveAmount.Add(getItemAmount(requiredItems[i]));
                    if (haveItems.Count < requiredItems.Count)
                    {
                        Debug.Log("You don't have enough items.");
                        StartCoroutine(waitBeforeClear());
                    }
                    else if (haveItems[i].Equals(requiredItems[i]))
                    {
                        Debug.Log("True");
                        canCraft = true;
                    }
                    else
                    {
                        Debug.Log("False");
                        haveItems.Clear();
                    }
                }
            }
        }

        if (canCraft)
        {
            for (int i = 0; i < haveItems.Count; i++)
            {
                changeItemAmount(haveItems[i], i);
            }
            Inventory.instance.AddItem(craftableItem);
            haveItems.Clear();
            haveAmount.Clear();
            canCraft = false;
        }
    }

    int getItemAmount(Item item)
    {
        int amount = 0;
        for (int i = 0; i < InventoryUI.inventoryui.slots.Length; i++)
        {
            if(InventoryUI.inventoryui.slots[i].item != null)
            {
                if (InventoryUI.inventoryui.slots[i].item == item)
                    amount += int.Parse(InventoryUI.inventoryui.slots[i].itemAmount.text);
            }
        }
        return amount;
    }

    void changeItemAmount(Item item, int index)
    {
        int required = requiredAmount[index];
        while(required > 0)
        {
            InventorySlot slot = InventoryUI.inventoryui.slots[getSlotIndex(item)];
            if(int.Parse(slot.itemAmount.text) <= required)
            {
                required -= int.Parse(slot.itemAmount.text);
                slot.RemoveItem();
            }
            else if(int.Parse(slot.itemAmount.text) >= required)
            {
                required -= int.Parse(slot.itemAmount.text);
                slot.itemAmount.text = (int.Parse(slot.itemAmount.text) - required).ToString();
            }
        }
    }

    int getSlotIndex(Item item)
    {
        int min = 0;
        for (int i = 0; i < InventoryUI.inventoryui.slots.Length; i++)
        {
            if (InventoryUI.inventoryui.slots[i].item == item && int.Parse(InventoryUI.inventoryui.slots[i].itemAmount.text) < min)
            {
                min = int.Parse(InventoryUI.inventoryui.slots[i].itemAmount.text);
                return i;
            }
        }
        return 0;
    }

    IEnumerator waitBeforeClear()
    {
        yield return new WaitForSeconds(0.01f);
        haveItems.Clear();
    }
}