using System;
using System.Collections.Generic;

namespace SpellBoundAR.Items.Inventories
{
    public interface IInventory
    {
        public static event Action<IInventory, IItemTypeData> OnAnyInventoryChanged;

        public static void InvokeOnAnyInventoryChanged(IInventory inventory, IItemTypeData itemTypeData)
        {
            OnAnyInventoryChanged?.Invoke(inventory, itemTypeData);
        }

        public event Action OnEntriesChanged;
        
        public string ID { get; }
        public List<IInventoryEntry> GetAllEntries();
        public IInventoryEntry GetEntry(IItemTypeData itemTypeData);
        public void Add(IItemTypeData itemTypeData, int quantity);
        public void Remove(IItemTypeData itemTypeData, int quantity);
        public void RemoveAll(IItemTypeData itemTypeData);
        public void Clear();

        public int GetItemQuantity(IItemTypeData itemTypeData)
        {
            if (itemTypeData == null) return 0;
            IInventoryEntry entry = GetEntry(itemTypeData);
            return entry?.Quantity ?? 0;
        }
        
        public List<IInventoryEntry> GetEntries<T>() where T : IItemTypeData
        {
            List<IInventoryEntry> entries = new List<IInventoryEntry>();
            foreach (IInventoryEntry entry in GetAllEntries())
            {
                if (entry == null) continue;
                if (entry.Quantity <= 0) continue;
                if (entry.ItemTypeData is not T) continue;
                entries.Add(entry);
            }
            return entries;
        }
    }
}