using System.ComponentModel.DataAnnotations;
using System.Runtime.Serialization;
using DS.Module.Core;
using DS.WMS.Core.Op.Entity;
using DS.WMS.Core.TaskInteraction.Method;
using Masuit.Tools.Systems;

namespace DS.WMS.Core.TaskInteraction.Dtos
{
    /// <summary>
    /// 任务请求基类
    /// </summary>
    public class TaskRequest : IValidatableObject
    {
        /// <summary>
        /// 业务ID
        /// </summary>
        public long BusinessId { get; set; }

        /// <summary>
        /// 业务ID，用于批量请求
        /// </summary>
        public long[]? Ids { get; set; }

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

        static readonly TaskBaseTypeEnum _defaultTaskType = TaskBaseTypeEnum.NOT_SPECIFIED;
        /// <summary>
        /// 任务类型；该属性为只读
        /// </summary>
        [IgnoreDataMember]
        public TaskBaseTypeEnum TaskType => string.IsNullOrEmpty(TaskTypeName) ? _defaultTaskType : Enum.Parse<TaskBaseTypeEnum>(TaskTypeName);

        /// <summary>
        /// 任务类型名称
        /// </summary>
        public string TaskTypeName { get; set; } = string.Empty;

        /// <summary>
        /// 附加数据（内部使用）
        /// </summary>
        public object? ExtraData { get; set; }

        /// <summary>
        /// 确定当前对象是否有效
        /// </summary>
        /// <param name="validationContext">验证上下文</param>
        /// <returns></returns>
        public virtual IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
        {
            if (BusinessId == 0 && (Ids == null || Ids.Length == 0))
            {
                yield return new ValidationResult($"参数 {nameof(BusinessId)} 与 {nameof(Ids)} 至少指定一项");
            }
            else if (string.IsNullOrEmpty(TaskTypeName))
            {
                yield return new ValidationResult($"参数 {nameof(TaskTypeName)} 不能为空");
            }
            else if (!Enum.TryParse(TaskTypeName, out TaskBaseTypeEnum taskType))
            {
                yield return new ValidationResult($"参数 {nameof(TaskTypeName)} 值不在有效枚举范围之内");
            }
            else if (TaskService.IsOrderType(TaskType) && BusinessType == null)
            {
                yield return new ValidationResult($"任务类型为【{TaskType.GetDescription()}】时，参数 {nameof(BusinessType)} 不能为空");
            }
        }
    }
}