using Photon.Pun;
using System;
using UnityEngine;

namespace Kryz.CharacterStats.Examples
{
    public class EquipmentPanel : MonoBehaviour
    {
        [SerializeField] Transform equipmentSlotsParent;
        [SerializeField] EquipmentSlot[] equipmentSlots;

        [SerializeField] GameEventListener onJoinedRoom;

        public UnityEvent_ItemInstance OnItemRightClickedEvent = new UnityEvent_ItemInstance();

        EquipmentInstanceData equipmentData = new EquipmentInstanceData();

        #region Singleton
        private static EquipmentPanel _instance;

        // Public reference to the singleton instance
        public static EquipmentPanel Instance
        {
            get
            {
                // If the instance doesn't exist, try to find it in the scene
                if (_instance == null)
                {
                    _instance = FindObjectOfType<EquipmentPanel>();
                }
                return _instance;
            }
        }
        #endregion

        private void Awake()
        {
            onJoinedRoom.Response.AddListener(LoadEquipment);
        }

        private void Start()
        {
            for (int i = 0; i < equipmentSlots.Length; i++)
            {
                equipmentSlots[i].OnRightClickEvent.AddListener((X) => OnItemRightClickedEvent.Invoke(X));
            }
        }

        private void OnValidate()
        {
            if (equipmentSlotsParent != null)
                equipmentSlots = equipmentSlotsParent.GetComponentsInChildren<EquipmentSlot>();
        }

        public EquippableItemInstance GetEquippedItemOnSpecificSlot(EquipmentType slot)
        {
            for (int i = 0; i < equipmentSlots.Length; i++)
            {
                if(equipmentSlots[i].EquipmentType == slot)
                {
                    return (EquippableItemInstance)equipmentSlots[i].Item;
                }
            }
            return null;
        }

        public bool AddItem(EquippableItemInstance item, out EquippableItemInstance previousItem)
        {
            for (int i = 0; i < equipmentSlots.Length; i++)
            {
                if (equipmentSlots[i].EquipmentType == item.EquipmentType)
                {
                    previousItem = (EquippableItemInstance)equipmentSlots[i].Item;
                    equipmentSlots[i].Item = item;

                    equipmentData.equippedItems[i] = item;
                    PlayerDataHandler.Instance.SaveCharacterEquipmentData(PlayerDataHandler.Instance.currentPlayerName.Value, PhotonNetwork.NickName, equipmentData);
                    return true;
                }
            }
            previousItem = null;
            return false;
        }

        public bool RemoveItem(EquippableItemInstance item)
        {
            for (int i = 0; i < equipmentSlots.Length; i++)
            {
                if (equipmentSlots[i].Item == item)
                {
                    equipmentSlots[i].Item = null;
                    equipmentData.equippedItems[i] = null;
                    PlayerDataHandler.Instance.SaveCharacterEquipmentData(PlayerDataHandler.Instance.currentPlayerName.Value, PlayerDataHandler.Instance.currentCharacterName.Value, equipmentData);
                    return true;
                }
            }
            return false;
        }

        public EquipmentSlot[] GetCurrentSlots()
        {
            return equipmentSlots;
        }

        public void LoadEquipment()
        {
            equipmentData = PlayerDataHandler.Instance.LoadCharacterEquipmentData(PlayerDataHandler.Instance.currentPlayerName.Value, PlayerDataHandler.Instance.currentCharacterName.Value);

            if (equipmentData != null)
            {
                Debug.Log("Success Loading Equipment");
                for (int i = 0; i < equipmentData.equippedItems.Length; i++)
                {
                    if (equipmentData.equippedItems[i] == null || string.IsNullOrEmpty(equipmentData.equippedItems[i].ItemName))
                    {
                        equipmentSlots[i].Item = null;
                    }
                    else
                    {
                        equipmentData.equippedItems[i].Icon = ItemIndexer.Instance.Items[equipmentData.equippedItems[i].templateIndex].Icon;
                        equipmentSlots[i].Item = equipmentData.equippedItems[i];
                    }
                }
            }
            else
            {
                for (int i = 0; i < equipmentSlots.Length; i++)
                {
                    equipmentSlots[i].Item = null;
                }

                equipmentData = new EquipmentInstanceData();

                PlayerDataHandler.Instance.SaveCharacterEquipmentData(PlayerDataHandler.Instance.currentPlayerName.Value, PlayerDataHandler.Instance.currentCharacterName.Value, equipmentData);
            }
        }

    }
}