using System.Collections.Generic;
using UnityEngine;

// InventoryManager.cs
public class ToolbarManager : MonoBehaviour, IItemManager<Slot>
{
    public delegate void ActiveSlotChangedHandler();

    public static ToolbarManager Instance;

    // private static ToolbarManager Instance;
    public readonly Dictionary<int, Slot> Slots = new();
    private readonly Slot.SlotType slotType = Slot.SlotType.Toolbar;

    public Slot ActiveSlot { get; set; }


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

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

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

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

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

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


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

    public void AddSlot(Slot slot)
    {
        slot.slotType = slotType;
        Slots[slot.slotId] = slot;
    }

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

    public Slot GetSlot(int slotId)
    {
        return Slots[slotId];
    }

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

    public event ActiveSlotChangedHandler OnActiveSlotChanged;

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

    public void SetActiveSlot(int slotId)
    {
        ActiveSlot = Slots[slotId];
        OnActiveSlotChanged?.Invoke();
    }


    public void Initialize(PlayerData playerData)
    {
        // add toolbar hotkeys 1 to 0 on keyboard
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 1", KeyCode.Alpha1, () => SetActiveSlot(0));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 2", KeyCode.Alpha2, () => SetActiveSlot(1));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 3", KeyCode.Alpha3, () => SetActiveSlot(2));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 4", KeyCode.Alpha4, () => SetActiveSlot(3));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 5", KeyCode.Alpha5, () => SetActiveSlot(4));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 6", KeyCode.Alpha6, () => SetActiveSlot(5));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 7", KeyCode.Alpha7, () => SetActiveSlot(6));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 8", KeyCode.Alpha8, () => SetActiveSlot(7));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 9", KeyCode.Alpha9, () => SetActiveSlot(8));
        HotkeyManager.Instance.RegisterHotkey("Activate Toolbar Slot 10", KeyCode.Alpha0, () => SetActiveSlot(9));

        // create player slots for inventory
        for (var i = 0; i < playerData.toolbarSize; i++) AddSlot(playerData.toolbarSlots[i]);

        Debug.Log("Completed Initialized hotkeys in ToolbarManager");
    }

    public Slot GetActiveToolbarSlot()
    {
        return ActiveSlot;
    }
}