evershade/Assets/Scripts/Managers/Item/EquipmentManager.cs

using System.Collections.Generic;
using UnityEngine;

public class EquipmentManager : MonoBehaviour, IItemManager<Slot>
{
    public static EquipmentManager Instance;
    public readonly Dictionary<int, Slot> Slots = new();

    public Slot ActiveSlot { get; set; }

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

    private void Start()
    {
        Debug.Log("EquipmentManager 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 RemoveSlot(int slotId)
    {
        Slots.Remove(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 void AddSlot(Slot slot)
    {
        Slots[slot.slotId] = slot;
    }

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


    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)
    {
        // TODO: check if item is valid for slot
        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];
    }


    public void Initialize(PlayerData playerData)
    {
        Debug.Log("Initializing EquipmentManager");
        LoadSlots(playerData.equipmentSlots);
        Debug.Log("Completed Initialized items in EquipmentManager");
    }

    public void LoadSlots(Dictionary<int, Slot> slots)
    {
        // clear existing slots
        Slots.Clear();
        ActiveSlot = null;
        foreach (var slot in slots) AddSlot(slot.Value);
    }
}