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：李毓明
    /// 创建时间：2013-7-23
    /// 说明：采用单例模式
    /// </summary>
    public class UserInfo
    {
        /// <summary>
        /// 重新登录事件
        /// </summary>
        public event EventHandler OnReLogin;
        private string _userId;
        private string _userName;
        private string _realName;
        private string _roleId;//未登录时为-1，预留超级用户为-99
        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

        #region 单例模式
        private static UserInfo user=null;
        public static UserInfo Instance
        {
            get
            {
                if ( user == null )
                {
                    user = new UserInfo();
                }
                return user;
            }
        }
        #endregion


        public UserInfo()
            : this( "-1" , "--" , "--" , "-1" )
        {
        }
        public UserInfo( string userId , string userName, string realName , string roleId )
        {
            this._userId = userId;
            this._userName = userName;
            this._realName = realName;
            this._roleId = roleId;
            this._loginTime = DateTime.Now;
        }

        public string UserID
        {
            get
            {
                return _userId;
            }
            set
            {
                _userId = value;
            }
        }

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

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

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

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

        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.PurviewID,TB.FormName,TB.FormText,TB.FormType FROM BasRolePurview TA INNER JOIN BasForm TB ON TA.PurviewID=TB.ObjID AND TA.PurviewType=TB.FormType WHERE "+_roleId+" IN(-99,TA.RoleID) AND TB.DeleteFlag='0'";

                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 '" + _roleId + "' IN('-99',TA.RoleGUID) AND TB.DeleteFlag='0'";

                dt = dbhelper.ToDataTable();
            }
            return dt;
        }

        /// <summary>
        /// 获取权限项列表
        /// </summary>
        public List<string> AllFormPurview
        {
            get
            {
                this.RefreshAllFormPurview();
                return this._allFormPurview;
            }
        }
        /// <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 [ObjID],[FormName],[FormText],[FormType],[DeleteFlag] FROM [BasForm] where DeleteFlag = 0";
                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>
        /// 获取当前用户的权限项列表
        /// </summary>
        public List<string> PurviewList
        {
            get
            {
                this.RefreshPurview();
                return this._purviewList;
            }
        }
        /// <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);
            }
        }
    }
}