using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using MbmStore.Models;

namespace MbmStore.Models
{
    public class Cart
    {
        private List<CartLine> lines = new List<CartLine>();
        public decimal TotalPrice
        {
            // Linq syntax
            get { return lines.Sum(e => e.Product.Price * e.Quantity); }
        }
        public List<CartLine> Lines { get { return lines; } }
        public Cart() { }
        public void AddItem(Product product, int quantity)
        {
            CartLine item = lines.Where(p => p.Product.ProductId == product.ProductId).FirstOrDefault();
            if (item == null)
            {
                lines.Add(new CartLine { Product = product, Quantity = quantity });
            }
            else
            {
                item.Quantity += quantity;
            }
        }
        public void RemoveItem(Product product)
        {
            lines.RemoveAll(i => i.Product.ProductId == product.ProductId);
        }
        public void Clear()
        {
            lines.Clear();
        }
    }