using System;
using System.Collections.Generic;
using System.Data;
using Mesnac.Codd;
using Mesnac.Codd.Session;

namespace Mesnac.Basic
{
    /// <summary>
    /// 登录用户信息类
    /// 创建人：初风鸣
    /// 创建时间：2013-7-23
    /// 说明：采用单例模式
    /// </summary>
    public class UserInfo
    {
        #region 事件定义

        /// <summary>
        /// 重新登录事件
        /// </summary>
        public event EventHandler OnReLogin;

        #endregion

        #region 字段定义

        private string _userGUId;
        private int _seqIndex;
        private string _userName;
        private string _realName;
        private string _roleGUID;//未登录时为-1，预留超级用户为-99
        private int _classID;       //所属班组
        private DateTime _loginTime;
        public const bool MustLogin=false;
        private List<string> _purviewList = null;   //当前用户的权限项列表
        private List<string> _allFormPurview = null; //所有权限项

        #endregion

        #region 单例模式

        private static UserInfo user=null;
        public static UserInfo Instance
        {
            get
            {
                //lock(String.Empty)
                {
                    if (user == null)
                    {
                        user = new UserInfo();
                    }
                    return user;
                }
            }
        }
        #endregion

        #region 构造方法

        public UserInfo()
            : this( "-1" , 0,  "--" , "--" , "-1", 1)
        {
        }

        public UserInfo( string userGUId , string userName, string realName , string roleGUID )
        {
            this._userGUId = userGUId;
            this._userName = userName;
            this._realName = realName;
            this._roleGUID = roleGUID;
            this._loginTime = DateTime.Now;
        }

        public UserInfo(string userGUId, int seqIndex, string userName, string realName, string roleGUID)
        {
            this._userGUId = userGUId;
            this._seqIndex = seqIndex;
            this._userName = userName;
            this._realName = realName;
            this._roleGUID = roleGUID;
            this._loginTime = DateTime.Now;
        }

        public UserInfo(string userGUId, int seqIndex, string userName, string realName, string roleGUID, int classID)
        {
            this._userGUId = userGUId;
            this._seqIndex = seqIndex;
            this._userName = userName;
            this._realName = realName;
            this._roleGUID = roleGUID;
            this._classID = classID;
            this._loginTime = DateTime.Now;
        }

        #endregion

        #region 属性定义

        public string UserGUID
        {
            get
            {
                return _userGUId;
            }
            set
            {
                _userGUId = value;
            }
        }

        public int SeqIndex
        {
            get { return _seqIndex; }
            set { _seqIndex = value; }
        }

        public string UserName
        {
            get
            {
                return _userName;
            }
            set
            {
                _userName = value;
            }
        }

        public string RealName
        {
            get
            {
                return _realName;
            }
            set
            {
                _realName = value;
            }
        }

        public string RoleGUID
        {
            get
            {
                return _roleGUID;
            }
            set
            {
                _roleGUID = value;
                if ( _roleGUID.Equals( "-99" ) )
                {
                    _userGUId = "mesnac";
                    _userName = "mesnac";
                    _realName = "超级用户";
                }
            }
        }

        public int ClassID
        {
            get { return _classID; }
            set { _classID = value; }
        }

        public DateTime LoginTime
        {
            get
            {
                return _loginTime; 
            }
            set
            {
                _loginTime = DateTime.Now;
            }
        }

        /// <summary>
        /// 当前登录窗体对象
        /// </summary>
        public System.Windows.Forms.Form FrmSysLogin { get; set; }

        /// <summary>
        /// 获取权限项列表
        /// </summary>
        public List<string> AllFormPurview
        {
            get
            {
                this.RefreshAllFormPurview();
                return this._allFormPurview;
            }
        }

        /// <summary>
        /// 获取当前用户的权限项列表
        /// </summary>
        public List<string> PurviewList
        {
            get
            {
                this.RefreshPurview();
                return this._purviewList;
            }
        }

        #endregion

        #region 方法定义

        public DataTable GetPurview()
        {
            DataTable dt = new DataTable();
            DbHelper dbhelper = DataSourceFactory.Instance.GetDbHelper( DataSourceFactory.MCDbType.Local);
            if ( dbhelper != null )
            {
                dbhelper.ClearParameter();
                dbhelper.CommandType = CommandType.Text;
                dbhelper.CommandText = "SELECT DISTINCT TA.PermissionItemGUID,TB.FormName,TB.FormText,TB.FormType FROM BasRolePermission TA INNER JOIN BasForm TB ON TA.PermissionItemGUID=TB.GUID AND TA.PermissionType=TB.FormType WHERE '" + _roleGUID + "' IN('-99',TA.RoleGUID) AND TB.DeleteFlag='0'";
                dt = dbhelper.ToDataTable();
            }
            return dt;
        }

        
        /// <summary>
        /// 刷新权限项列表
        /// </summary>
        public void RefreshAllFormPurview()
        {
            if (this._allFormPurview == null)
            {
                this._allFormPurview = new List<string>();
            }
            this._allFormPurview.Clear();
            DataTable dt = new DataTable();
            DbHelper dbhelper = DataSourceFactory.Instance.GetDbHelper(DataSourceFactory.MCDbType.Local);
            if (dbhelper != null)
            {
                dbhelper.ClearParameter();
                dbhelper.CommandType = CommandType.Text;
                dbhelper.CommandText = "SELECT [GUID],[FormName],[FormText],[FormType],[DeleteFlag] FROM [BasForm] where DeleteFlag = 0";
                dt = dbhelper.ToDataTable();
            }
            if (dt != null)
            {
                foreach (DataRow row in dt.Rows)
                {
                    this._allFormPurview.Add(row["FormName"] as string);
                }
            }
        }
        
        /// <summary>
        /// 刷新当前用户权限项
        /// </summary>
        public void RefreshPurview()
        {
            if (this._purviewList == null)
            {
                this._purviewList = new List<string>();
            }
            this._purviewList.Clear();
            DataTable table = this.GetPurview();
            if (table != null)
            {
                foreach (DataRow row in table.Rows)
                {
                    this._purviewList.Add(row["FormName"] as string);
                }
            }
        }

        /// <summary>
        /// 触发重新登录事件
        /// </summary>
        public void TriggerReLoginEvent()
        {
            if (this.OnReLogin != null)
            {
                this.OnReLogin(this, System.EventArgs.Empty);
            }
        }

        #endregion
    }
}