using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;

namespace BBWY.Client.Models
{
    /// <summary>
    /// 采购商
    /// </summary>
    public class Purchaser : NotifyObject
    {
        private int skuUseCount;

        public string Id { get; set; }

        public string Name { get; set; }

        /// <summary>
        /// 使用该采购商的SKU数量
        /// </summary>
        public int SkuUseCount { get => skuUseCount; set { Set(ref skuUseCount, value); } }

        public string ProductId { get; set; }

        public string Location { get; set; }

        public Platform Platform { get; set; }

        public decimal DefaultCost { get; set; }

        public DateTime? LastPurchaseTime { get; set; }
    }

    public class PurchaserComparer : IEqualityComparer<Purchaser>
    {
        public bool Equals([AllowNull] Purchaser x, [AllowNull] Purchaser y)
        {
            if (Object.ReferenceEquals(x, y)) return true;

            if (Object.ReferenceEquals(x, null) || Object.ReferenceEquals(y, null))
                return false;

            return x?.Id == y?.Id;
        }

        public int GetHashCode([DisallowNull] Purchaser obj)
        {
            return base.GetHashCode();
        }
    }
}