using Cysharp.Threading.Tasks;
using SepCore.AsyncTask;
using SepCore.Event;
using UnityEngine;
using UnityEngine.UI;

namespace SepCore.UI
{
    public class DisplayItem : MonoBehaviour
    {
        [SerializeField] private IconArea _iconArea;

        [SerializeField] private RectTransform _itemRect;
        
        [SerializeField] private CommonButton _button;

        private DisplayItemContext _context;

        private int _index = -1;

        private bool _listenersBound;

        public async UniTaskVoid OnInit(DisplayItemContext context, int index)
        {
            EnsureListeners();

            _context = context;
            _index = index;

            var sprite = await SpriteLoader.LoadSpriteByKeyAsync(_context.IconAssetName);
            _iconArea.OnInit(sprite, _context.Rarity);
        }

        public void OnReset()
        {
            _context = null;
            _index = -1;

            _iconArea.OnReset();
        }

        private void EnsureListeners()
        {
            if (_listenersBound)
            {
                return;
            }

            _listenersBound = true;

            CommonButton button = GetComponent<CommonButton>();
            button.onClick.AddListener(OnItemInfoLock);
            button.RegisterPointerEnterAction(OnItemInfoShow);
            button.RegisterPointerExitAction(OnItemInfoHide);
        }

        private void OnItemInfoShow()
        {
            if (_index < 0) return;

            Rect rect = _itemRect.rect;
            Vector3 targetPos = _itemRect.TransformPoint(new Vector3(
                (rect.xMin + rect.xMax) / 2,
                rect.yMax,
                0f)
            );
            GameEntry.Event.Fire(this, DisplayItemHoverEventArgs.Create(_index, _context.IsWeapon, targetPos));
        }

        private void OnItemInfoLock()
        {
            GameEntry.Event.Fire(this, DisplayItemLockEventArgs.Create());
        }

        private void OnItemInfoHide()
        {
            GameEntry.Event.Fire(this, DisplayItemHideEventArgs.Create());
        }
    }
}