using System;
using SepCore.Event;
using TMPro;
using UnityEngine;

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

        [SerializeField] private TMP_Text _titleText;

        [SerializeField] private TMP_Text _typeText;

        [SerializeField] private TMP_Text _descriptionText;

        [SerializeField] private TMP_Text _costText;
        [SerializeField] private CommonButton _purchaseButton = null;
        [SerializeField] private TMP_Text _purchaseLabel = null;
        [SerializeField] private CanvasGroup _canvasGroup = null;

        private GoodsItemContext _data;

        private int _index = -1;

        private bool _listenersBound;

        public void Init(GoodsItemContext data, int index)
        {
            EnsureListeners();

            _index = index;
            _data = data;
            _canvasGroup.alpha = 1f;
            _purchaseLabel.text = "购买";

            _iconArea.OnInit(data.Icon, data.Rarity);
            _titleText.text = data.Name;
            _typeText.text = data.TypeName;
            _descriptionText.text = data.Description;
            _costText.text = $"{data.Price} <sprite name=\"coin\" index=0>";
        }

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

        public void MarkPurchased()
        {
            OnReset();
            _canvasGroup.alpha = 0.5f;
            _purchaseButton.interactable = false;
            _purchaseLabel.text = "已购买";
        }

        public void RefreshAvailability(int playerCoin, bool weaponCapacityFull)
        {
            if (_index < 0)
            {
                return;
            }

            bool weaponFull = _data.ItemType == ItemType.Weapon && weaponCapacityFull;
            bool affordable = playerCoin >= _data.Price;
            _purchaseButton.interactable = affordable && !weaponFull;
            _purchaseLabel.text = weaponFull ? "武器已满" : affordable ? "购买" : "金币不足";
        }

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

            _listenersBound = true;

            _purchaseButton.onClick.AddListener(OnPurchaseClick);
        }

        private void OnPurchaseClick()
        {
            if (_index < 0)
            {
                return;
            }

            GameEntry.Event.Fire(this, ShopPurchaseEventArgs.Create(_index));
        }
    }
}