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

namespace GameServer
{
    /// <summary>
    /// 房间
    /// </summary>
    public class Room
    {
        #region 静态
        private static List<Room> rooms = new List<Room>();
        //public static ulong counter = 1;
        #endregion

        /// <summary>
        /// 房间ID
        /// </summary>
        public ulong roomId = 0;
        /// <summary>
        /// 房间名称
        /// </summary>
        public string roomname = "";
        /// <summary>
        /// 创建人
        /// </summary>
        public ulong creater = 0;
        /// <summary>
        /// 房间用户
        /// </summary>
        public List<User> users = new List<User>();

        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="_roomname">房间名称</param>
        /// <param name="_creater">创建人ID</param>
        public Room(string _roomname, ulong _creater)
        {
            roomId = ulong.Parse(_roomname);
            roomname = _roomname;
            creater = _creater;
        }

        /// <summary>
        /// 创建房间
        /// </summary>
        /// <param name="_roomname">房间名称</param>
        /// <param name="_creater">创建人ID</param>
        /// <returns></returns>
        public static Room Create(string _roomname, ulong _creater)
        {
            var room = new Room(_roomname, _creater);
            rooms.Add(room);
            return room;
        }

        /// <summary>
        /// 获取房间列表
        /// </summary>
        /// <param name="_creater">创建人</param>
        /// <returns></returns>
        public static string GetRooms(ulong _creater = 0)
        {
            StringBuilder sb = new StringBuilder();
            rooms.ForEach(r =>
            {
                if (_creater == 0)
                    sb.AppendFormat("{0},{1},{2};", r.roomId, r.roomname, r.creater);
                else
                {
                    if (r.creater == _creater)
                        sb.AppendFormat("{0},{1},{2};", r.roomId, r.roomname, r.creater);
                }
            });
            return sb.ToString().Trim(';');
        }

        /// <summary>
        /// 加入房间
        /// </summary>
        /// <param name="_user"></param>
        /// <param name="_roomId"></param>
        /// <returns></returns>
        public static string JoinRoom(User _user, ulong _roomId)
        {
            var room = rooms.Find(r => r.roomId == _roomId);
            if (_user.roomId == 0)
            {
                if (room != null && !room.users.Contains(_user))
                {
                    room.users.Add(_user);
                    _user.roomId = _roomId;
                    return string.Format("{0},{1},{2}", room.roomId, room.roomname, room.creater);
                }
            }
            return "";
        }

        /// <summary>
        /// 批量加入房间
        /// </summary>
        /// <param name="_roomId"></param>
        /// <returns></returns>
        public static List<User> BatchJoinRoom(ulong _roomId)
        {
            var room = rooms.Find(r => r.roomId == _roomId);
            List<User> users = User.GetAllUsers();
            if (room != null)
            {
                for (int i = 0; i < users.Count; i++)
                {
                    int index = i;
                    if (users[index].roomId == 0)
                    {
                        if (!room.users.Contains(users[index]))
                        {
                            room.users.Add(users[index]);
                            users[index].roomId = _roomId;
                        }
                    }
                }
                return users;
            }
            return users;
        }

        /// <summary>
        /// 离开房间
        /// </summary>
        /// <param name="_user">用户</param>
        /// <returns></returns>
        public static string LeaveRoom(User _user)
        {
            if (_user != null)
            {
                var room = rooms.Find(r => r.roomId == _user.roomId);
                if (room != null)
                {
                    room.users.Remove(_user);
                    _user.roomId = 0;
                    return string.Format("{0},{1},{2},{3}", room.roomId, room.roomname, room.creater,_user.userId);
                }
            }
            return "";
        }

        /// <summary>
        /// 关闭房间
        /// </summary>
        /// <param name="roomId">房间ID</param>
        /// <returns></returns>
        public static string CloseRoom(ulong _roomId)
        {
            var room = rooms.Find(r => r.roomId == _roomId);
            if (room != null)
            {
                room.users.ForEach(u =>
                {
                    //通知退出
                    u.Write(string.Format("roomclosed {0}", room.roomId));
                    u.roomId = 0;
                });
                room.users.Clear();
                rooms.Remove(room);

                //关闭房间通知
                return string.Format("{0}", room.roomId);
            }
            return "";
        }
    }
}