using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using YAPContracts.Exceptions;
using YAPContracts.Extentions;
using YAPContracts.Infrastructure;

namespace YAPContracts.DataModels
{
    public class PurchaseDataModel : IValidation
    {
        public string Id { get; private set; }

        public string UserId { get; private set; }

        public double TotalPrice { get; private set; }

        public DateTime PurchaseDate { get; private set; }

        public List<ProductSetInPurchaseDataModel> ProductSets { get; private set; }

        public List<ProductInPurchaseDataModel> Products { get; private set; }

        public PurchaseDataModel(string id, string userId, double totalPrice, DateTime purchaseDate, List<ProductSetInPurchaseDataModel> productSets, List<ProductInPurchaseDataModel> products)
        {
            Id = id;
            UserId = userId;
            TotalPrice = totalPrice;
            PurchaseDate = purchaseDate;
            ProductSets = productSets;
            Products = products;
        }

        public PurchaseDataModel()
        {
            Id = string.Empty;
            UserId = string.Empty;
            TotalPrice = 0;
            PurchaseDate = DateTime.UtcNow;
            ProductSets = new List<ProductSetInPurchaseDataModel>();
            Products = new List<ProductInPurchaseDataModel>();
        }

        public void Validate()
        {
            if (!Id.IsGuid())
            {
                throw new ValidationException("Id value is not valid");
            }
            if (Id.IsEmpty())
            {
                throw new ValidationException("Id is empty");
            }
            if (!UserId.IsGuid())
            {
                throw new ValidationException("UserId value is not valid");
            }
            if (UserId.IsEmpty())
            {
                throw new ValidationException("UserId is empty");
            }
            foreach (var productSet in ProductSets)
            {
                productSet.Validate();
            }
            foreach (var product in Products)
            {
                product.Validate();
            }
        }
    }
}