using System.Collections.Generic;
using HK;

namespace Runtime
{
    public class ShoppingCart
    {
        public string userName = string.Empty;
        public string userModie = string.Empty;
        public string userEmail = string.Empty;
        public string orderID = string.Empty;
        public bool isAgreeSubscribe = false;
        public List<ShoppingCartData> datas = new List<ShoppingCartData>();
        public string totalQuantity = "0";
        public string itemsSubTotal = "0";
        public string discount = "0";
        public string totalAmount = "0";

        public void AddData(ShoppingCartData data)
        {
            datas.Add(data);
            UpdateDatas();
        }

        public void RemoveData(ShoppingCartData data)
        {
            datas.Remove(data);
            UpdateDatas();
        }

        public void Reset()
        {
            datas.Clear();
            UpdateDatas();
        }

        public void UpdateDatas()
        {
            totalQuantity = string.Empty;
            itemsSubTotal = string.Empty;
            discount = string.Empty;
            totalAmount = string.Empty;

            int i = 0, d = 0, t = 0, q = 0;
            foreach (var shoppingCartData in datas)
            {
                q += shoppingCartData.count;
                i += shoppingCartData.bookAmount * shoppingCartData.count;
                d += shoppingCartData.bookDiscount * shoppingCartData.count;
                t += shoppingCartData.bookAmount * shoppingCartData.count;
            }

            totalQuantity = q.ToString();
            itemsSubTotal = i.ToString("F");
            discount = d.ToString("F");
            totalAmount = t.ToString("F");
        }
    }

    public class ShoppingCartData
    {
        /// <summary>
        /// name
        /// </summary>
        public string bookName;

        /// <summary>
        /// 价格
        /// </summary>
        public int bookAmount;

        /// <summary>
        /// 优惠
        /// </summary>
        public int bookDiscount;

        /// <summary>
        /// 数量
        /// </summary>
        public int count;

        public byte[] previewImage;
        public byte[] tifImage;
    }

    public class ShoppingCartManager : ManagerBase<ShoppingCartManager>
    {
        private ShoppingCart shoppingCart = new();
        public ShoppingCart ShoppingCart => shoppingCart;

        public void AddToCart(ShoppingCartData data)
        {
            shoppingCart.AddData(data);
        }

        public void RemoveFromCart(ShoppingCartData data)
        {
            shoppingCart.RemoveData(data);
        }

        public void RefreshCart()
        {
            shoppingCart.UpdateDatas();
        }

        public void ResetCart()
        {
            shoppingCart.Reset();
        }
    }
}