using DS.WMS.Core.Op.Entity;
using System.ComponentModel.DataAnnotations;
using System.Diagnostics.CodeAnalysis;
using System.Runtime.Serialization;

namespace DS.WMS.Core.Application.Dtos
{
    /// <summary>
    /// 业务ID与类型
    /// </summary>
    public class BizItem
    {
        public static readonly BizItemComparer DefaultComparer = new();

        /// <summary>
        /// 业务ID
        /// </summary>
        public long Id { get; set; }

        /// <summary>
        /// 业务类型
        /// </summary>
        public BusinessType BusinessType { get; set; }


        public class BizItemComparer : IEqualityComparer<BizItem>
        {
            public bool Equals(BizItem? x, BizItem? y)
            {
                if (x == null || y == null)
                    return false;

                return x.Id == y.Id && x.BusinessType == y.BusinessType;
            }

            public int GetHashCode([DisallowNull] BizItem obj)
            {
                return obj.Id.GetHashCode() ^ (int)obj.BusinessType;
            }
        }
    }

    /// <summary>
    /// 费用对象/单位
    /// </summary>
    public class FeeClient : BizItem
    {
        /// <summary>
        /// 费用对象ID
        /// </summary>
        public long CustomerId { get; set; }
    }

    public class BizOperation : IValidatableObject
    {
        /// <summary>
        /// 请求值（object类型，根据业务按需传值）
        /// </summary>
        public object Value { get; set; }

        /// <summary>
        /// 业务ID与类型
        /// </summary>
        public List<BizItem>? Items { get; set; }

        /// <summary>
        /// 业务ID
        /// </summary>
        [IgnoreDataMember]
        public IEnumerable<long>? Ids => Items?.Select(x => x.Id).Distinct();

        /// <summary>
        /// 业务类型
        /// </summary>
        [IgnoreDataMember]
        public IEnumerable<BusinessType>? Types => Items?.Select(x => x.BusinessType).Distinct();

        public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if (Items == null || Items.Count == 0)
            {
                yield return new ValidationResult($"缺少请求参数：{nameof(Items)}");
            }
        }
    }

    public class BizOperation<T> : BizOperation
    {
        /// <summary>
        /// 请求值（根据业务按需传值）
        /// </summary>
        public new T Value { get; set; }
    }
}