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

namespace GameServer
{
    public class User
    {
        #region 私有，静态
        private static List<User> Users = new List<User>();
        //private static ulong counter = 1;
        #endregion

        /// <summary>
        /// 用户ID（服务端）
        /// </summary>
        public ulong userId = 0;
        /// <summary>
        /// 远程终端节点
        /// </summary>
        public string remoteId = "";
        /// <summary>
        /// 用户姓名
        /// </summary>
        public string username = "";
        /// <summary>
        /// 所在房间ID（0表示不在任何房间）
        /// </summary>
        public ulong roomId = 0;
        public TcpClient client = null;
        public NetworkStream stream = null;

        /// <summary>
        /// 用户构造函数
        /// </summary>
        /// <param name="_client">客户端</param>
        /// <param name="_stream">流</param>
        public User(TcpClient _client, NetworkStream _stream)
        {
            client = _client;
            stream = _stream;
            remoteId = client.Client.RemoteEndPoint.ToString();
            Users.Add(this);
        }

        /// <summary>
        /// 注册
        /// </summary>
        /// <param name="_username">名字</param>
        public void Regist(string _username)
        {
            userId = ulong.Parse(_username);
            username = _username;
            byte[] response = Encoding.UTF8.GetBytes(string.Format("regist {0},{1},{2}", userId, username, roomId));
            stream.WriteAsync(response, 0, response.Length);
        }

        /// <summary>
        /// 写入
        /// </summary>
        /// <param name="msg"></param>
        public void Write(string msg)
        {
            byte[] buffer = Encoding.UTF8.GetBytes(msg);
            stream.WriteAsync(buffer, 0, buffer.Length);
        }

        public void OffLine()
        {
            Room.LeaveRoom(this);
            Users.Remove(this);
        }

        /// <summary>
        /// 创建用户
        /// </summary>
        /// <param name="_client"></param>
        /// <returns></returns>
        public static User Create(TcpClient _client, NetworkStream _stream)
        {
            return new User(_client, _stream);
        }

        /// <summary>
        /// 获取用户列表
        /// </summary>
        /// <param name="except">除此之外（通常指自己）</param>
        /// <returns></returns>
        public static string GetUsers(ulong except, ulong roomId = 0)
        {
            StringBuilder sb = new StringBuilder();
            var tempUsers = Users;
            if (roomId != 0)
            {
                tempUsers = Users.Where(u => u.roomId.Equals(roomId)).ToList();
            }
            tempUsers.ForEach(u =>
            {
                if (u.userId != except)
                {
                    sb.AppendFormat("{0},{1},{2};", u.userId, u.username, u.roomId);
                }

            });
            return sb.ToString().Trim(';');
        }

        public static List<User> GetAllUsers()
        {
            return Users;
        }

        /// <summary>
        /// 私发
        /// </summary>
        /// <param name="_userId"></param>
        public static void Send2User(ulong _userId, string msg)
        {
            var user = Users.Find(u => u.userId == _userId);
            if (user != null)
            {
                user.Write(msg);
            }
        }

        /// <summary>
        /// 房间
        /// </summary>
        /// <param name="_roomId"></param>
        public static void Send2Room(ulong _userId, ulong _roomId, string msg)
        {
            var users = Users.Where(u => u.roomId == _roomId && u.userId != _userId).ToList();
            users.ForEach(u =>
            {
                if (u.roomId != 0)
                {
                    u.Write(msg);
                }
            });
        }

        /// <summary>
        /// 房间
        /// </summary>
        /// <param name="_roomId"></param>
        public static void Send2Player(ulong _userId, ulong _roomId, string msg)
        {
            var users = Users.Where(u => u.roomId == _roomId && u.userId != _userId).ToList();
            users.ForEach(u =>
            {
                if (u.roomId != 0)
                {
                    u.Write(String.Format("{0}", msg));
                }
            });
        }

        /// <summary>
        /// 世界
        /// </summary>
        /// <param name="_user"></param>
        public static void Send2World(User _user, string msg)
        {
            Users.ForEach((u) =>
            {
                if (u.userId != _user.userId)
                    u.Write(msg);
            });
        }
    }
}