using TMPro;
using UnityEngine;
using UnityEngine.UI;
using GeometryTD.CustomEvent;

namespace GeometryTD.UI
{
    public class TowerSelectItem : MonoBehaviour
    {
        [SerializeField] private Image _icon;

        [SerializeField] private TMP_Text _price;

        [SerializeField] private CommonButton _button;

        [SerializeField] private TowerIconArea _towerIconArea;

        private TowerSelectItemContext _context;

        private Sprite _defaultIcon;

        private bool _hasCachedDefaultIcon;

        public void OnInit(TowerSelectItemContext context)
        {
            CacheDefaultIcon();
            _context = context;

            if (context.ActionType == CombatSelectActionType.BuildTower)
            {
                _icon?.gameObject.SetActive(false);
                _towerIconArea?.OnInit(_context.TowerIconAreaContext);

                if (_price != null)
                {
                    _price.text = context.PriceText ?? string.Empty;
                }

                if (_button != null)
                {
                    _button.Interactive = context.IsInteractable;
                }
            }
            else if (context.ActionType is CombatSelectActionType.UpgradeTower or CombatSelectActionType.DestroyTower)
            {
                if (_icon != null)
                {
                    _icon.sprite = _context.Icon ?? _defaultIcon;
                    _icon.gameObject.SetActive(true);
                }

                _towerIconArea?.OnReset();

                if (_price != null)
                {
                    _price.text = context.PriceText ?? string.Empty;
                }

                if (_button != null)
                {
                    _button.Interactive = context.IsInteractable;
                }
            }
            else
            {
                _icon?.gameObject.SetActive(false);
                _towerIconArea?.OnReset();
            }
        }

        public void OnReset()
        {
            _context = null;
            CacheDefaultIcon();

            if (_icon != null)
            {
                _icon.sprite = _defaultIcon;
                _icon.enabled = _icon.sprite != null;
            }

            _towerIconArea.OnReset();

            if (_price != null)
            {
                _price.text = string.Empty;
            }

            if (_button != null)
            {
                _button.Interactive = false;
            }
        }

        public void OnClick()
        {
            if (_context == null || !_context.IsInteractable)
            {
                return;
            }

            GameEntry.Event.Fire(
                this,
                CombatSelectItemClickEventArgs.Create(_context.ActionType, _context.ActionIndex));
        }

        private void CacheDefaultIcon()
        {
            if (_hasCachedDefaultIcon || _icon == null)
            {
                return;
            }

            _defaultIcon = _icon.sprite;
            _hasCachedDefaultIcon = true;
        }
    }
}