using System;
using System.Collections;
using Language.Lua;
using PixelCrushers.DialogueSystem;
using Sirenix.Utilities;
using UnityEngine;
using UnityEngine.UI;
using UnityStandardAssets.CrossPlatformInput;

namespace Beyond {

    public class ItemButtonController : MonoBehaviour
    {
        public bEquipSlot equipSlot;
        private bEquipArea equipArea;
        public Image image;
        public GameObject imageParent;
        private int currentIndex = 0;
        private string imagePath = "";
        public string InputNameToPress = "M";
        private bool isLocked = false;
        private float lockDuration = 0.5f;

        [SerializeField]
        private bItemType itemType = 0;
        [SerializeField]
        private bItemType itemType2 = 0;
        [SerializeField]
        private ImagePulser imagePulser;
        [SerializeField]
        private bool pulseImage = true;
        //override
        private float pulseSpeed = 10f;
        /// <summary>
        /// to set image properly for disabled
        /// </summary>
        private event Action onEnabled;
        private bool m_currentWeaponGemable = false;
        private bItem m_currentItem = null;
        private bItemAttribute m_weaponPowerAttribute;
        private PlayerAttribute faith;
        // Start is called before the first frame update
        private void Awake()
        {
            //SetConsumableButton();
            equipSlot.onAddItem.AddListener(SetButton);
            equipSlot.onRemoveItem.AddListener(SetButton);
            Player.Instance.ItemManager.onEquipItem.AddListener(OnEquipItem);
            Player.Instance.ItemManager.onUnequipItem.AddListener(OnUnequipItem);
            //start with 0, end on 2. On consume, equipped recheck binding here
            equipArea = equipSlot.GetComponentInParent<bEquipArea>();
            bool thisSlot = false;
            for (int i=0; i<equipArea.equipSlots.Count; i++)
            {
                if (equipArea.equipSlots[i] == equipSlot)
                {
                    currentIndex = i;
                    break;
                }
            } 
        }

        void Start()
        {
            faith = Player.Instance.GetAttribute("Faith");
        }

        bool MatchesType(bItemType type)
        {
            return itemType == type || itemType2 == type;
        }
        //this 2 methods are only for gems - to check if button should be visible for gemable weapon
        private void OnEquipItem(bEquipArea area, bItem item)
        {
            if (!MatchesType(item.type))
            {
                return;
            }

            //Debug.Log("On Unequiped weapon in area: "+area.name+" weapon: "+weapon.name);
            //if current button type is gemstone, check if button should be active
            //check if this slot was equiped
  
            if (area.currentEquippedItem == equipSlot.item)
            {
                //m_weaponPowerAttribute = item.GetItemAttribute(bItemAttributes.Power);
                //m_currentWeaponGemable = m_weaponPowerAttribute !=null;
                SetButton(item);

            }


        }

        private void OnUnequipItem(bEquipArea area, bItem item)
        {
            if (!MatchesType(item.type))
            {
                return;
            }
            //Debug.Log("On Unequiped weapon in area: "+area.name+" weapon: "+weapon.name);
            if (m_currentWeaponGemable && item.GetItemAttribute(bItemAttributes.Power) !=null)
            { 
                m_currentWeaponGemable = false;
                m_weaponPowerAttribute = null;
            }
            if (item == m_currentItem)
            {
                SetButton(null);
            }
           
        }

        public void EnablePulsing(bool e)
        {
            if (!imagePulser)
                return;
            pulseImage = e;
        }
        
        void Update()
        {
            if (imagePulser == null || !pulseImage)
                return;
            float value;
            imagePulser.speed = pulseSpeed;
            imagePulser.scaleAmount = 1.2f;


            /*
            switch (itemType)
            {
                case bItemType.Consumable:
                    value = Player.Instance.CurrentHealth / Player.Instance.MaxHealth;
                    if (value > 0.25)
                        imagePulser.StopPulsing();
                    else
                        imagePulser.StartPulsing();
                    break;
                case bItemType.ConsumablesFaith:
                    value = faith.AttributeCurrentValue / faith.AttributeMaxValue;
                    if (value > 0.25)
                        imagePulser.StopPulsing();
                    else
                        imagePulser.StartPulsing();
                    break;
                case bItemType.Gemstones:
                    if (m_weaponPowerAttribute != null)
                    {
                        if (m_weaponPowerAttribute.value > 1)
                        {
                            imagePulser.StopPulsing();
                        }
                        else
                        {
                            imagePulser.StartPulsing();
                        }
                    }
                break;

            }
            */
        }

        private void OnEnable()
        {
            //because unloaded in menu image needs to be reloaded again
            if (imagePath.Length > 1)
            {
                image.sprite = Resources.Load<Sprite>(imagePath);
            }
            isLocked = false;
        }

        private void OnDestroy()
        {
            if (equipSlot)
            {
                equipSlot.onAddItem.RemoveListener(SetButton);
                equipSlot.onRemoveItem.RemoveListener(SetButton);
                Player.Instance.ItemManager.onEquipItem.RemoveListener(OnEquipItem);
                Player.Instance.ItemManager.onEquipItem.RemoveListener(OnUnequipItem);
            }
        }

        public void SetButton(bItem item = null)
        {
          
            imagePath = "";
            if (item != null)
            {
                TryToUnloadOldImage();
                imagePath = item.iconPath;
                image.sprite = Resources.Load<Sprite>(imagePath);
            }
                

           

            //if current weapon is geamable, then show button only if button type is gemstone
            if (item == null)
            {
                imageParent.SetActive(false);
            }
            else if (item.type == bItemType.Gemstones) 
            {
                imageParent.SetActive(m_currentWeaponGemable);
            }
            else
            {
                imageParent.SetActive(true);
            }
            m_currentItem = item;

            onEnabled = null;
        }

        private void TryToUnloadOldImage()
        {
            if (image.sprite != null)
            {
                Resources.UnloadAsset(image.sprite);
                //Resources.UnloadUnusedAssets();
            }
        }

        public void ConsumeItem()
        {
            if (isLocked)
            {
                return;
            }
            
            if (m_currentItem.type == bItemType.QuantaPower || m_currentItem.type == bItemType.PowerScroll)
            {
                // --- FIX STARTS HERE ---
                // Old logic: Player.Instance.Magic.SelectPowerBasedOnArea(currentIndex);
                // New Logic: Directly tell the equipment area to select this slot.
                // MagicAttacks automatically looks at whatever is equipped in this area.
                if (equipArea != null)
                {
                    equipArea.SetEquipSlot(currentIndex);
                }
                // --- FIX ENDS HERE ---

                if (!InputNameToPress.IsNullOrWhitespace())
                {
                    CrossPlatformInputManager.SetButtonDown(InputNameToPress);
                    CrossPlatformInputManager.SetButtonUp(InputNameToPress);
                }
            }
            else
            {
                equipArea.UseItem(equipArea.equipSlots[currentIndex]);
            }            
            //short button lock would be nice here
            
            if (equipSlot.item == null)
            {
                SetButton(null);
            }
            else
            {
                isLocked = true;
                StartCoroutine(UnlockButtonCoroutine());
            }
        }

        private IEnumerator UnlockButtonCoroutine()
        {
            yield return new WaitForSeconds(lockDuration);
            isLocked = false;
        }
    }
}