using learun.iapplication;
using learun.util;
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;

namespace learun.application
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.11.05
	/// 描 述：即时通讯消息内容
	/// </summary>
	public class IMMsgService : ServiceBase
	{
		private readonly IMContactsService iMContactsService = new IMContactsService();

		#region 构造函数和属性

		private readonly string fieldSql;

		/// <summary>
		///
		/// </summary>
		public IMMsgService()
		{
			fieldSql = @"
                t.F_MsgId,
                t.F_IsSystem,
                t.F_SendUserId,
                t.F_RecvUserId,
                t.F_Content,
                t.F_CreateDate
            ";
		}

		#endregion 构造函数和属性

		#region 获取数据

		/// <summary>
		/// 获取列表数据(最近的10条聊天记录)
		/// </summary>
		/// <returns></returns>
		public async Task<IEnumerable<IMMsgEntity>> GetList(string sendUserId, string recvUserId)
		{
			var strSql = new StringBuilder();
			strSql.Append("SELECT ");
			strSql.Append(fieldSql);
			strSql.Append(" FROM LR_IM_Msg t where  (t.F_SendUserId = @sendUserId and  t.F_RecvUserId = @recvUserId ) or  (t.F_SendUserId = @recvUserId and  t.F_RecvUserId = @sendUserId ) ");

			Pagination pagination = new Pagination
			{
				page = 1,
				rows = 10,
				sidx = "F_CreateDate",
				sord = "DESC"
			};

			await this.BaseRepository().ExecuteSql(" Update LR_IM_Contacts Set F_ISREAD = 2 where  F_MyUserId = @sendUserId AND  F_OtherUserId =  @recvUserId  ", new { sendUserId, recvUserId });

			return await this.BaseRepository().FindList<IMMsgEntity>(strSql.ToString(), new { sendUserId, recvUserId }, pagination);
		}

		/// <summary>
		/// 获取列表数据(小于某个时间点的5条记录)
		/// </summary>
		/// <param name="myUserId">我的ID</param>
		/// <param name="otherUserId">对方的ID</param>
		/// <param name="time">时间</param>
		/// <returns></returns>
		public Task<IEnumerable<IMMsgEntity>> GetListByTime(string myUserId, string otherUserId, DateTime time)
		{
			var strSql = new StringBuilder();
			strSql.Append("SELECT ");
			strSql.Append(fieldSql);
			strSql.Append(" FROM LR_IM_Msg t where  ((t.F_SendUserId = @myUserId and  t.F_RecvUserId = @otherUserId ) or  (t.F_SendUserId = @otherUserId and  t.F_RecvUserId = @myUserId )) AND t.F_CreateDate <= @time ");

			Pagination pagination = new Pagination();
			pagination.page = 1;
			pagination.rows = 5;
			pagination.sidx = "F_CreateDate";
			pagination.sord = "DESC";

			return this.BaseRepository().FindList<IMMsgEntity>(strSql.ToString(), new { myUserId, otherUserId, time }, pagination);
		}

		/// <summary>
		/// 获取列表数据(大于某个时间的所有数据)
		/// </summary>
		/// <param name="myUserId">我的ID</param>
		/// <param name="otherUserId">对方的ID</param>
		/// <param name="time">时间</param>
		/// <returns></returns>
		public Task<IEnumerable<IMMsgEntity>> GetListByTime2(string myUserId, string otherUserId, DateTime time)
		{
			time = time.AddSeconds(1);
			var strSql = new StringBuilder();
			strSql.Append("SELECT ");
			strSql.Append(fieldSql);
			strSql.Append(" FROM LR_IM_Msg t where  ((t.F_SendUserId = @myUserId and  t.F_RecvUserId = @otherUserId ) or  (t.F_SendUserId = @otherUserId and  t.F_RecvUserId = @myUserId )) AND t.F_CreateDate >= @time Order By  F_CreateDate ASC ");

			return this.BaseRepository().FindList<IMMsgEntity>(strSql.ToString(), new { myUserId, otherUserId, time });
		}

		/// <summary>
		/// 获取列表分页数据
		/// </summary>
		/// <param name="pagination">分页参数</param>
		/// <param name="sendUserId"></param>
		/// <param name="recvUserId"></param>
		/// <param name="keyword"></param>
		/// <returns></returns>
		public Task<IEnumerable<IMMsgEntity>> GetPageList(Pagination pagination, string sendUserId, string recvUserId, string keyword)
		{
			var strSql = new StringBuilder();
			strSql.Append("SELECT ");
			strSql.Append(fieldSql);
			strSql.Append(" FROM LR_IM_Msg t where  ((t.F_SendUserId = @sendUserId and  t.F_RecvUserId = @recvUserId ) or  (t.F_SendUserId = @recvUserId and  t.F_RecvUserId = @sendUserId )) ");

			if (!string.IsNullOrEmpty(keyword))
			{
				keyword = "%" + keyword + "%";
				strSql.Append(" AND F_Content like @keyword ");
			}

			return this.BaseRepository().FindList<IMMsgEntity>(strSql.ToString(), new { sendUserId, recvUserId, keyword }, pagination);
		}

		#endregion 获取数据

		#region 提交数据

		/// <summary>
		/// 删除实体数据
		/// </summary>
		/// <param name="keyValue">主键</param>
		/// <returns></returns>
		public async Task DeleteEntity(string keyValue)
		{
			await this.BaseRepository().DeleteAny<IMMsgEntity>(new { F_MsgId = keyValue });
		}

		/// <summary>
		/// 保存实体数据（新增）
		/// </summary>
		/// <param name="entity">实体数据</param>
		/// <returns></returns>
		public async Task SaveEntity(IMMsgEntity entity)
		{
			IMContactsEntity myContacts = new IMContactsEntity();
			IMContactsEntity otherContacts = new IMContactsEntity();

			myContacts.F_MyUserId = entity.F_SendUserId;
			myContacts.F_OtherUserId = entity.F_RecvUserId;
			myContacts.F_Content = entity.F_Content;

			otherContacts.F_MyUserId = entity.F_RecvUserId;
			otherContacts.F_OtherUserId = entity.F_SendUserId;
			otherContacts.F_Content = entity.F_Content;

			var myContactsTmp = await iMContactsService.GetEntity(myContacts.F_MyUserId, myContacts.F_OtherUserId);
			var otherContactsTmp = await iMContactsService.GetEntity(otherContacts.F_MyUserId, otherContacts.F_OtherUserId);

			var db = this.BaseRepository().BeginTrans();
			try
			{
				myContacts.F_IsRead = 2;
				myContacts.F_Time = DateTime.Now;
				if (myContactsTmp == null)
				{
					myContacts.F_Id = Guid.NewGuid().ToString();
					await db.Insert(myContacts);
				}
				else
				{
					myContacts.F_Id = myContactsTmp.F_Id;
					await db.Update(myContacts);
				}

				otherContacts.F_IsRead = 1;
				otherContacts.F_Time = DateTime.Now;
				if (otherContactsTmp == null)
				{
					otherContacts.F_Id = Guid.NewGuid().ToString();
					await db.Insert(otherContacts);
				}
				else
				{
					otherContacts.F_Id = otherContactsTmp.F_Id;
					await db.Update(otherContacts);
				}

				entity.F_MsgId = Guid.NewGuid().ToString();
				entity.F_CreateDate = DateTime.Now;

				await db.Insert(entity);

				db.Commit();
			}
			catch (Exception)
			{
				db.Rollback();
				throw;
			}
		}

		#endregion 提交数据
	}
}