FM/Assets/Scripts/FUJIFILM/UI/Logic/ShoppingCartUI.cs

using System.Collections.Generic;
using Runtime;
using UnityEngine.UI;
using TMPro;
using Unity.VisualScripting;
using UnityEngine;
using ZGame;

namespace HK.FUJIFILM
{
    public class ShoppingCartUI : UIBase
    {
        [SerializeField] private UpMenuItem goUpMenu;
        [SerializeField] private ScrollRect scrCarts;
        [SerializeField] private TMP_Text txtTotalQty;
        [SerializeField] private TMP_Text txtSubTotal;
        [SerializeField] private TMP_Text txtDiscount;
        [SerializeField] private TMP_Text txtGrandTotal;
        [SerializeField] private Button btnCheckout;

        List<ShopCartItem> items = new List<ShopCartItem>();

        public override void OnInit()
        {
            base.OnInit();

            #region AutoGen_Init

            goUpMenu = GetValue<UpMenuItem>("goUpMenu");
            scrCarts = GetValue<ScrollRect>("scrCarts");
            txtTotalQty = GetValue<TMP_Text>("txtTotalQty");
            txtSubTotal = GetValue<TMP_Text>("txtSubTotal");
            txtDiscount = GetValue<TMP_Text>("txtDiscount");
            txtGrandTotal = GetValue<TMP_Text>("txtGrandTotal");
            btnCheckout = GetValue<Button>("btnCheckout");

            scrCarts.onValueChanged.AddListener(OnValueChangedscrCarts);
            btnCheckout.onClick.AddListener(OnClickbtnCheckout);

            #endregion

            goUpMenu.ReturnAction += ClickReturn;
            EventManager.Instance.Subscribe(AddCommodityToShoppingCartEventArgs.EventId,
                AddCommodityToShoppingCartEvent);
            EventManager.Instance.Subscribe(ClearShoppingCartEventArgs.EventId, ClearShoppingCartEvent);
        }

        private void ClearShoppingCartEvent(object sender, GameEventArgs e)
        {
            foreach (var item in items)
            {
                GameObject.Destroy(item.gameObject);
            }

            items.Clear();
        }

        private void AddCommodityToShoppingCartEvent(object sender, GameEventArgs e)
        {
            var args = e as AddCommodityToShoppingCartEventArgs;
        }

        private void ClickReturn()
        {
            UIManager.Instance.BackLast();
        }

        public override void OnOpen(UIBase lastUI)
        {
            base.OnOpen(lastUI);
            goUpMenu.OnShow();
            UpdateShoppingCart();
        }

        void UpdateShoppingCart()
        {
            foreach (var item in items)
            {
                GameObject.Destroy(item.gameObject);
            }

            items.Clear();

            var shoppingCart = ShoppingCartManager.Instance.ShoppingCart;

            foreach (var cartData in shoppingCart.datas)
            {
                Gen(cartData);
            }

            txtTotalQty.text = $"{shoppingCart.totalQuantity}";
            txtSubTotal.text = $"{shoppingCart.itemsSubTotal}";
            txtDiscount.text = $"{shoppingCart.discount}";
            txtGrandTotal.text = $"{shoppingCart.totalAmount}";
        }

        void OnlyUpdateMsg()
        {
            var shoppingCart = ShoppingCartManager.Instance.ShoppingCart;

            txtTotalQty.text = $"{shoppingCart.totalQuantity}";
            txtSubTotal.text = $"{shoppingCart.itemsSubTotal}";
            txtDiscount.text = $"{shoppingCart.discount}";
            txtGrandTotal.text = $"{shoppingCart.totalAmount}";
        }

        void Gen(ShoppingCartData shoppingCartData)
        {
            var go = ResourcesManager.Instance.LoadGameObject(
                AssetConst.Assets_Res_FUJIFILM_Prefabs_UI_Item_ShopCartItem_prefab,
                scrCarts.content);
            var item = go.GetComponent<ShopCartItem>(); // ShopCartItem
            item.SetData(shoppingCartData);
            item.OnUpdateCallback += OnlyUpdateMsg;
            go.SetActive(true);
            items.Add(item);
        }

        #region AutoGen_Method

        private void OnValueChangedscrCarts(Vector2 v)
        {
        }

        private void OnClickbtnCheckout()
        {
            UIManager.Instance.CloseAll();
            UIManager.Instance.ShowUI(nameof(HomeUI),null);
        }

        #endregion

        public override void OnDispose()
        {
            base.OnDispose();

            EventManager.Instance.Unsubscribe(AddCommodityToShoppingCartEventArgs.EventId,
                AddCommodityToShoppingCartEvent);
            EventManager.Instance.Unsubscribe(ClearShoppingCartEventArgs.EventId, ClearShoppingCartEvent);

            #region AutoGen_Dispose

            scrCarts.onValueChanged.RemoveListener(OnValueChangedscrCarts);
            btnCheckout.onClick.RemoveListener(OnClickbtnCheckout);

            goUpMenu = null;
            scrCarts = null;
            txtTotalQty = null;
            txtSubTotal = null;
            txtDiscount = null;
            txtGrandTotal = null;
            btnCheckout = null;

            #endregion
        }
    }
}