using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using BITKit;
using BITKit.Entities;
using UnityEngine.InputSystem;
using static UnityEditor.Progress;
using System.Diagnostics;
using System.Linq;
using BITKit.Entities.Player;
using UnityEngine.InputSystem.Interactions;
using Debug = UnityEngine.Debug;

namespace BITFALL
{
    [CustomType(typeof(IPlayerEquipSelector))]
    public class PlayerEquipSelector : EntityComponent,TaskSubscriber<IBasicItem>,IEntityInventoryCallback,IPlayerEquipSelector
    {
        [Header(Constant.Header.Components)]
        public EntityEquipment equipment;

        [Header(Constant.Header.InternalVariables)]
        private readonly Dictionary<int, IBasicItem> equips=new();
        private IBasicItemContainer inventory;
        
        public event Action<IBasicItem> OnEquip;
        public event Action<IBasicItem> OnDeEquip;
        public event Action<IDictionary<int, IBasicItem>> OnUpdateEquip;

        private IBasicItem currentEquip;
        public override void OnAwake()
        {
            var health = entity.Get<IHealth>();
            health.OnSetAlive += OnSetAlive;
            OnDeEquip += DeEquip;
            OnEquip += Equip;
        }
        public override void OnStart()
        {
            base.OnStart();

            entity.RegisterCallback<TaskSubscriber<IBasicItem>>(this);

            inventory = entity.Get<IBasicItemContainer>();
        }
        public void OnPrimary(InputAction.CallbackContext context)
        {
            if (context is not {interaction:PressInteraction ,performed:true}) return;
            Equip(1);
        }
        public void OnSecondary(InputAction.CallbackContext context)
        {
            if (context is not {interaction:PressInteraction ,performed:true}) return;
            Equip(2);
        }
        public void OnTertiary(InputAction.CallbackContext context)
        {
            if (context is not {interaction:PressInteraction ,performed:true}) return;
            if (Equip(3) is false)
            {
                Equip(-1);
            }
        }
        public void OnQuaternary(InputAction.CallbackContext context)
        {
            if (context is not {interaction:PressInteraction ,performed:true}) return;
            Equip(4);
        }
        public void OnHolster(InputAction.CallbackContext context)
        {
            if (context is not {interaction:PressInteraction ,performed:true}) return;
            Equip(-1);
        }
        private void OnSetAlive(bool alive)
        {
            if (alive) return;
            foreach (var x in equips.ToArray())
            {
                inventory.Add(x.Value);
            }
            equips.Clear();
            UpdateEquip();
            Equip(-1);
        }
        int TaskSubscriber<IBasicItem>.Priority => 0;

        bool TaskSubscriber<IBasicItem>.TryExecute(IBasicItem value)
        {
            var asset = value.GetAssetable();
            if (IsSupportItem(value) is false) return false;
            switch (asset)
            {
                case var _ when asset.TryGetProperty<EquipmentAsWeapon>(out _):
                    if (equips.TryAdd(1, value) || equips.TryAdd(2,value))
                    {
                        OnEquip?.Invoke(value);
                        UpdateEquip();
                        return true;
                    }
                    break;
            }
            return false;
        }
        public void OnAdd(IBasicItem item)
        {
          
        }

        public void OnRemove(IBasicItem item)
        {
            if (IsSupportItem(item) is false)
            {
                UpdateEquip();
            }
        }
        private bool IsSupportItem(IBasicItem item)
        {
            return equipment.equips.list.Any(x => x.AddressablePath == item.AddressablePath);
        }
        private void UpdateEquip()
        {
            OnUpdateEquip?.Invoke(new Dictionary<int, IBasicItem>(equips));
        }
 
        public bool TryDeEquip(IBasicItem item)
        {
            if (item is null) return false;
            if (equips.Any(x => x.Value.AddressablePath == item.AddressablePath) is false) return false;
            var index = equips.Single(x=>x.Value.AddressablePath==item.AddressablePath).Key;
            if (equips.TryRemove(index) is false) return false;
            if (!inventory.Add(item)) return false;
            OnDeEquip?.Invoke(item);
            UpdateEquip();
            return true;
        }

        private void Equip(IBasicItem item)
        {
            if (item is null)
            {
                equipment.equips.Entry(-1);
            }
            else
            {
                equipment.equips.Entry(x=>x.AddressablePath == item.AddressablePath);
            }
        }

        private bool Equip(int index)
        {
            if (!equips.TryGetValue(index, out var x) && index is not -1) return false;
            if (index is -1)
            {
                OnEquip?.Invoke(x);
            }
            return true;
        }
        private void DeEquip(IBasicItem item)
        {
            equipment.equips.Entry(-1);
        }
    }
}