using System.Collections.Generic;
using UnityEngine;

// InventoryManager.cs
public class BoxManager : MonoBehaviour, IItemManager<Slot>
{
    public delegate void ActiveBoxChangedHandler(Box box);

    public static BoxManager Instance;

    public readonly Dictionary<int, Box> Boxes = new();
    public Box ActiveBox { get; set; }

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
        }
        else
        {
            Destroy(gameObject);
        }
    }

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

    public void AddItemToSlot(GameItem item, int slotId)
    {
        if (ActiveBox.Slots.TryGetValue(slotId, out var slot))
            slot.item = item;
        else
            Debug.LogWarning("Slot not found: " + slotId);
    }

    public void RemoveSlot(int slotId)
    {
        ActiveBox.Slots.Remove(slotId);
    }

    public GameItem GetItemFromSlot(int slotId)
    {
        return ActiveBox.Slots.TryGetValue(slotId, out var slot) ? slot.item : null;
    }

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

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

    public void RemoveItemFromSlot(int slotId)
    {
        if (ActiveBox.Slots.TryGetValue(slotId, out var slot))
            slot.item = null;
        else
            Debug.LogWarning("Slot not found: " + slotId);
    }

    public Slot GetSlot(int slotId)
    {
        return ActiveBox.Slots.GetValueOrDefault(slotId, null);
    }

    public void AddSlot(Slot slot)
    {
        ActiveBox.AddSlot(slot);
    }

    public void SwapItems(int slotId1, int slotId2)
    {
        if (ActiveBox.Slots.TryGetValue(slotId1, out var slot1) &&
            ActiveBox.Slots.TryGetValue(slotId2, out var slot2))
            (slot1.item, slot2.item) = (slot2.item, slot1.item);
    }

    public event ActiveBoxChangedHandler OnActiveBoxChanged;

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

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

    public void RemoveItemInSlot(int slotId)
    {
        if (ActiveBox.Slots.TryGetValue(slotId, out var slot))
            slot.item = null;
        else
            Debug.LogWarning("Slot not found: " + slotId);
    }

    public void Initialize()
    {
        var testBoxCount = 5;

        for (var i = 0; i < testBoxCount; i++)
        {
            var box = ScriptableObject.CreateInstance<Box>();
            box.boxId = i;
            Boxes[i] = box;

            // box created
            Debug.Log("Created box: " + i);

            // add 30 slots to each box
            for (var j = 0; j < 30; j++)
            {
                var slot = ScriptableObject.CreateInstance<Slot>();
                Debug.LogWarning("Added slots to box: " + j + " / 30 slots added");
                slot.slotId = j;
                slot.slotType = Slot.SlotType.Box;
                slot.item = null;
                box.AddSlot(slot);
            }


            SetActiveBox(i);
            // add random inventory to box
            for (var j = 0; j < 10; j++)
            {
                var item = GameItemManager.Instance.gameItems[
                    Random.Range(0, GameItemManager.Instance.gameItems.Count - 1)];


                box.AddItemToOpenSlot(item);
            }
        }


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


    public void SetActiveBox(int boxId)
    {
        Debug.Log("Active box set to: " + boxId);
        ActiveBox = Boxes.GetValueOrDefault(boxId);

        // Trigger the event
        OnActiveBoxChanged?.Invoke(ActiveBox);
    }
}