using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ChatRoomServer.Db
{
	using System.Data.Entity;
	using ChatRoomServer.Db.Entities;

	public class ChatDb : DbContext
	{
		static ChatDb()
		{
			System.Data.Entity.Database.SetInitializer<ChatDb>(null);
		}

		public ChatDb() :
			base(System.Configuration.ConfigurationManager.ConnectionStrings["12306.chat"].ConnectionString)
		{

		}

		/// <summary>
		/// This method is called when the model for a derived context has been initialized, but
		///             before the model has been locked down and used to initialize the context.  The default
		///             implementation of this method does nothing, but it can be overridden in a derived class
		///             such that the model can be further configured before it is locked down.
		/// </summary>
		/// <remarks>
		/// Typically, this method is called only once when the first instance of a derived context
		///             is created.  The model for that context is then cached and is for all further instances of
		///             the context in the app domain.  This caching can be disabled by setting the ModelCaching
		///             property on the given ModelBuidler, but note that this can seriously degrade performance.
		///             More control over caching is provided through use of the DbModelBuilder and DbContextFactory
		///             classes directly.
		/// </remarks>
		/// <param name="modelBuilder">The builder that defines the model for the context being created. </param>
		protected override void OnModelCreating(DbModelBuilder modelBuilder)
		{
			base.OnModelCreating(modelBuilder);

			var cfg = modelBuilder.Configurations;
			cfg.AddFromAssembly(System.Reflection.Assembly.GetExecutingAssembly());
		}

		public virtual DbSet<User> Users { get; set; }

		public virtual DbSet<Room> Rooms { get; set; }

		public virtual DbSet<ServerGroup> ServerGroups { get; set; }

		public virtual DbSet<MsgLog> MsgLogs { get; set; }

		public virtual DbSet<Announcement> Announcements { get; set; }


		public virtual DbSet<OnlineHistory> OnlineHistories { get; set; }

		public virtual DbSet<AbuseReport> AbuseReports { get; set; }

		public virtual DbSet<UserConnectLog> UserConnectLogs { get; set; }

		public virtual DbSet<BlockUser> BlockUsers { get; set; }

		/// <summary>
		/// 异步获得指定用户的屏蔽列表
		/// </summary>
		/// <param name="username"></param>
		/// <returns></returns>
		public Task<BlockUser[]> GetBlockRuleForUserAsync(string username)
		{
			return BlockUsers.SqlQuery("exec usp_BlockUser_GetUserBlockRule {0}", username).ToArrayAsync();
		}

		/// <summary>
		/// 异步获得指定用户的屏蔽列表
		/// </summary>
		/// <param name="username"></param>
		/// <returns></returns>
		public BlockUser[] GetBlockRuleForUser(string username)
		{
			return BlockUsers.SqlQuery("exec usp_BlockUser_GetUserBlockRule {0}", username).ToArray();
		}

		/// <summary>
		/// 查询指定用户在单位时间内被举报的人数
		/// </summary>
		/// <param name="username"></param>
		/// <param name="minutes"></param>
		/// <returns></returns>
		public int GetUserAbuseReportCountInTime(string username, int minutes)
		{
			return Database.SqlQuery<int>("exec usp_BlockUser_GetUserReportCount {0}, {1}", username, minutes).First();
		}
	}
}