using ContactService.Domain.Events;
using IM.DomainCommons;

namespace ContactService.Domain.Entities
{
    public class FriendRequest : AggregateRootEntity
    {
        /// <summary>
        /// 申请人	
        /// </summary>
        public Guid OwnerId { get; private set; }

        /// <summary>
        /// 被申请人	
        /// </summary>
        public Guid TargetId { get; private set; }


        /// <summary>
        /// 申请附言	
        /// </summary>
        public string Description { get; private set; } = "申请添加好友";

        /// <summary>
        /// 申请状态（0：待通过,1:拒绝,2:同意,3：拉黑）	
        /// </summary>
        public FriendRequestStatus State { get; private set; } = FriendRequestStatus.Pending;

        /// <summary>
        /// 备注
        /// </summary>
        public string? RemarkName { get; private set; }

        private FriendRequest() { }

        public FriendRequest(Guid ownerId, Guid targetId, string? description, string? remarkName)
        {
            OwnerId = ownerId;
            TargetId = targetId;
            Description = description ?? Description;
            RemarkName = remarkName;
            AddDomainEvent(new FriendRequestCreatedDomainEvent(this));
        }
        public void Accept(string remarkName)
        {
            if (State != FriendRequestStatus.Pending)
            {
                throw new DomainException("只能处理待处理的好友请求");
            }
            State = FriendRequestStatus.Passed;
            AddDomainEvent(new FriendRequestStateUpdateDomainEvent(this,remarkName));
        }

        public void Reject()
        {
            if (State != FriendRequestStatus.Pending)
            {
                throw new DomainException("只能处理待处理的好友请求");
            }
            State = FriendRequestStatus.Declined;
            AddDomainEvent(new FriendRequestStateUpdateDomainEvent(this));
        }
        public void Block()
        {
            if (State != FriendRequestStatus.Pending)
            {
                throw new DomainException("只能处理待处理的好友请求");
            }
            State = FriendRequestStatus.Blocked;
            AddDomainEvent(new FriendRequestStateUpdateDomainEvent(this));
        }
    }
}