using Chickensoft.AutoInject;
using Chickensoft.Introspection;
using Chickensoft.Serialization;
using Godot;
using System;
using System.Collections.Generic;
using System.Linq;
using Zennysoft.Game.Abstractions;
using Zennysoft.Ma.Adapter;

namespace Zennysoft.Game.Ma;

[Meta(typeof(IAutoNode)), Id("inventory")]
public partial class Inventory : Node, IInventory
{
  public override void _Notification(int what) => this.Notify(what);

  // TODO: Constants class with export
  private const int _maxInventorySize = 20;

  public event Action<string> BroadcastMessage;
  public event Action InventoryChanged;

  public Inventory()
  {
    Items = [];
  }

  [Save("inventory_items")]
  public List<InventoryItem> Items { get; private set; }

  public bool PickUpItem(InventoryItem item)
  {
    var isAdded = TryAdd(item);
    if (isAdded)
    {
      BroadcastMessage?.Invoke($"{item.ItemName} picked up.");
      SfxDatabase.Instance.Play(SoundEffect.PickupItem);
    }
    else
      BroadcastMessage?.Invoke($"Could not pick up {item.ItemName}.");

    return isAdded;
  }

  public bool TryAdd(InventoryItem inventoryItem)
  {
    if (Items.Count >= _maxInventorySize)
      return false;

    Items.Add(inventoryItem);
    InventoryChanged?.Invoke();
    return true;
  }

  public bool TryInsert(InventoryItem inventoryItem, int index)
  {
    if (Items.Count >= _maxInventorySize || index >= _maxInventorySize || index < 0)
      return false;

    Items.Insert(index, inventoryItem);
    InventoryChanged?.Invoke();
    return true;
  }

  public void Remove(InventoryItem inventoryItem)
  {
    Items.Remove(inventoryItem);
    InventoryChanged?.Invoke();
  }

  public bool Sort(EquipableItem currentWeapon, EquipableItem currentArmor, EquipableItem currentAccessory)
  {
    var initialList = Items;
    var equippedWeapon = Items.OfType<Weapon>().Where(x => x == currentWeapon);
    var equippedArmor = Items.OfType<Armor>().Where(x => x == currentArmor);
    var equippedAccessory = Items.OfType<Accessory>().Where(x => x == currentAccessory);
    var equippedItems = new List<InventoryItem>();
    equippedItems.AddRange(equippedWeapon);
    equippedItems.AddRange(equippedArmor);
    equippedItems.AddRange(equippedAccessory);
    var listToSort = Items.Except(equippedItems);
    var weapons = listToSort.Where(x => x is Weapon).OrderBy(x => x as Weapon, new WeaponComparer());
    var armor = listToSort.Where(x => x is Armor).OrderBy(x => x as Armor, new ArmorComparer());
    var accessories = listToSort.Where(x => x is Accessory).OrderBy(x => x as Accessory, new AccessoryComparer());
    var consumables = listToSort.Where(x => x is ConsumableItem).OrderBy(x => x as ConsumableItem, new ConsumableComparer());
    var throwables = listToSort.Where(x => x is ThrowableItem).OrderBy(x => x as ThrowableItem, new ThrowableComparer());
    var effectItems = listToSort.Where(x => x is EffectItem).OrderBy(x => x as EffectItem, new EffectComparer());
    Items = [.. equippedItems, .. weapons, .. armor, .. accessories, .. consumables, .. throwables, .. effectItems];

    var stackableItems = Items.OfType<IStackable>();
    var itemsToStack = stackableItems.GroupBy(x => ((InventoryItem)x).ItemName).Where(x => x.Count() > 1);
    foreach (var itemStack in itemsToStack)
    {
      var firstItem = itemStack.First();
      firstItem.SetCount(itemStack.Count());
      var itemsToRemove = itemStack.Except([firstItem]).Cast<InventoryItem>();
      Items = [.. Items.Except(itemsToRemove)];
    }

    return !Items.SequenceEqual(initialList);
  }

  public class WeaponComparer : IComparer<Weapon>
  {
    public int Compare(Weapon x, Weapon y)
    {
      if (x.BonusAttack == y.BonusAttack)
        return x.ItemName.CompareTo(y.ItemName);

      return x.BonusAttack < y.BonusAttack ? 1 : -1;
    }
  }

  public class ArmorComparer : IComparer<Armor>
  {
    public int Compare(Armor x, Armor y)
    {
      if (x.BonusDefense == y.BonusDefense)
        return x.ItemName.CompareTo(y.ItemName);

      return x.BonusDefense < y.BonusDefense ? 1 : -1;
    }
  }

  public class AccessoryComparer : IComparer<Accessory>
  {
    public int Compare(Accessory x, Accessory y)
    {
      return x.ItemName.CompareTo(y.ItemName);
    }
  }

  public class ConsumableComparer : IComparer<ConsumableItem>
  {
    public int Compare(ConsumableItem x, ConsumableItem y)
    {
      return x.ItemName.CompareTo(y.ItemName);
    }
  }
  public class ThrowableComparer : IComparer<ThrowableItem>
  {
    public int Compare(ThrowableItem x, ThrowableItem y)
    {
      return x.ItemName.CompareTo(y.ItemName);
    }
  }

  public class EffectComparer : IComparer<EffectItem>
  {
    public int Compare(EffectItem x, EffectItem y)
    {
      return x.ItemName.CompareTo(y.ItemName);
    }
  }
}