using System.Collections.Generic;
using Managers;
using UnityEngine;


// InventoryManager.cs
public class InventoryManager : MonoBehaviour
{
    public List<InventorySlot> inventorySlots = new();
    public PlayerManager playerManager;

    private void Start()
    {
        Debug.Log("InventoryManager Start");
        InitializeInventory();
    }

    private void AddSlot(InventorySlot slot)
    {
        inventorySlots.Add(slot);
    }

    public InventorySlot GetSlot(int slotId)
    {
        foreach (var slot in inventorySlots)
            if (slot.slotId == slotId)
            {
                Debug.Log("Got slot: " + slotId);
                return slot;
            }

        Debug.LogWarning("Slot not found: " + slotId);
        return null;
    }

    private void RemoveSlot(InventorySlot slot)
    {
        inventorySlots.Remove(slot);
    }

    public void RemoveItemFromSlot(GameItem item)
    {
        foreach (var slot in inventorySlots)
            if (slot.item == item)
            {
                slot.item = null;
                Debug.Log("Removed item from slot: " + item.itemName);
                return;
            }

        Debug.LogWarning("Item not found in any slot: " + item.itemName);
    }

    public GameItem GetItemFromSlot(int slotId)
    {
        Debug.Log("Getting item from slot: " + slotId);
        foreach (var slot in inventorySlots)
            if (slot.slotId == slotId && slot.item != null)
            {
                Debug.Log("Got item from slot: " + slot.item.itemName);
                return slot.item;
            }

        Debug.LogWarning("Item not found in slot: " + slotId);
        return null;
    }

    public void SetItemInSlot(int slotId, GameItem item)
    {
        Debug.Log("Setting item in slot: " + slotId + " / " + item?.itemName ?? "null");
        foreach (var slot in inventorySlots)
            if (slot.slotId == slotId)
            {
                if (item == null)
                {
                    Debug.Log("Item is null, removing item from slot: " + slotId);
                    slot.item = null;
                    return;
                }

                slot.item = item;
                return;
            }

        Debug.LogWarning("Item not found in slot: " + slotId);
    }

    public void SwapItems(int slotId1, int slotId2)
    {
        var item1 = GetItemFromSlot(slotId1);
        var item2 = GetItemFromSlot(slotId2);

        SetItemInSlot(slotId1, item2);
        SetItemInSlot(slotId2, item1);
    }

    public void AddItemToOpenSlot(GameItem item)
    {
        foreach (var slot in inventorySlots)
            if (slot.IsEmpty())
            {
                slot.slotId = inventorySlots.IndexOf(slot);
                slot.item = item;
                Debug.Log("Added item to slot: " + slot.slotId + " / " + item.itemName);
                return;
            }

        Debug.LogWarning("No empty slots available to add item: " + item.itemName);
    }

    public void InitializeInventory()
    {
        // create player slots for inventory
        for (var i = 0; i < playerManager.playerData.inventorySize; i++)
        {
            var slot = ScriptableObject.CreateInstance<InventorySlot>();
            slot.slotId = i;
            slot.item = null;
            AddSlot(slot);
        }


        AddItemToOpenSlot(GameItemManager.Instance.gameItems[0]);
        AddItemToOpenSlot(GameItemManager.Instance.gameItems[1]);
        AddItemToOpenSlot(GameItemManager.Instance.gameItems[2]);
        AddItemToOpenSlot(GameItemManager.Instance.gameItems[3]);


        Debug.Log("Completed Initialized items in InventoryManager");
    }
}