using System;
using System.Collections;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace Beyond
{
    public class SkillsMenuController : MonoBehaviour
    {
        [SerializeField]
        private bEquipArea spellsArea;

        public bItemWindow itemPicker;

        public SkillSlot skillSlotPrefab;

        private List<SkillSlot> skillSlots = new List<SkillSlot>();

        public RectTransform skillsPickerRect, skillsDescriptionRect;

        private SkillSlot selectedSlot;

        [SerializeField] private Image skillImage, skillBackgroundQuanta, levelImage;
        [SerializeField] private TMP_Text skillDescription, skillTitle;
        [SerializeField] private Sprite noSkillImage;
        [SerializeField] private List<Sprite> levelImages;

        public void RefreshSpellsWindow()
        {
            LoadSkills();
            if (skillSlots.Count > 0)
            {
                SelectSlot(skillSlots[0]);
            }
        }

        private void LoadSkills()
        {
            //could optimize here
            while (skillSlots.Count > 0)
            {
                Destroy(skillSlots[0].gameObject);
                skillSlots.RemoveAt(0);
            }

            List<CompleteSkillInfo> unlockedSkills = SkillsManager.instance.GetAllUnlockedSkills();

            if (unlockedSkills.Count <= 0)
            {
                DisableDescriptionObjects();

                return;
            }
            else
            {
                EnableDescriptionObjects();
            }

            unlockedSkills.ForEach(skill =>
            {
                SkillSlot clone = Instantiate(skillSlotPrefab, skillsPickerRect);
                clone.title.text = skill.skillInfo.descriptioryName;// + " lvl. " + skill.currentLevel;
                clone.description = skill.skillInfo.description;
                clone.image.sprite = Resources.Load<Sprite>(skill.skillInfo.imagePath);
                clone.quantaImage.sprite = Resources.Load<Sprite>(skill.skillInfo.quantaImagePath);
                clone.quantaBackgroundImage = Resources.Load<Sprite>(skill.skillInfo.quantaBackgroundImagePath);
                clone.levelImage.sprite = levelImages[skill.currentLevel - 1];
                clone.skillType = skill.skillInfo.skillType;
                clone.SetNotSeenIcon(clone.skillType);
                clone.SetAsDeselected();
                clone.Clicked += () => SelectSlot(clone);
                skillSlots.Add(clone);
            });
        }

        private void DisableDescriptionObjects()
        {
            skillsDescriptionRect.gameObject.SetActive(false);
            skillTitle.enabled = false;
        }

        private void EnableDescriptionObjects()
        {
            skillsDescriptionRect.gameObject.SetActive(true);
            skillTitle.enabled = true;
        }

        private void SelectSlot(SkillSlot clone)
        {
            if (selectedSlot)
            {
                selectedSlot.SetAsDeselected();
            }
            selectedSlot = clone;
            selectedSlot.SetAsSelected();

            skillImage.sprite = selectedSlot.image.sprite;
            skillBackgroundQuanta.sprite = selectedSlot.quantaBackgroundImage;
            levelImage.sprite = clone.levelImage.sprite;

            skillDescription.text = selectedSlot.description;
            skillTitle.text = selectedSlot.title.text;
            LayoutRebuilder.ForceRebuildLayoutImmediate(skillsDescriptionRect);
        }
    }
}