using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using ProjectBase.Controls;
using System.IO;
using SIMDP.BLL;
using ProjectBase.Data.Encrypt;
using ProjectBase.Data.Logs;
using ProjectBase.Data.XML;
using ProjectBase.Util;
using ProjectBase.Data.BaseDAL;

namespace SIMDP.View
{
    public partial class FormLogIn : BaseDock
    {
        #region Delegate
        /// <summary>
        /// 开始登录代理
        /// </summary>
        /// <param name="connectPara"></param>
        /// <returns></returns>
        private delegate bool LoginBeginHandler(object connectPara);
        #endregion

        /// <summary>
        /// 用户ID
        /// </summary>
        private string userid = "";
        //private string useridMD5 = "";

        /// <summary>
        /// MD5加密后的密码
        /// </summary>
        private string passwordMD5 = string.Empty;

        /// <summary>
        /// 用户登录记录文件名
        /// </summary>
        private const string logonRecordsFileName = "LogonRecords.xml";

        /// <summary>
        /// 用户登录记录文件全路径
        /// </summary>
        private string logonRecordsPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, logonRecordsFileName);

        /// <summary>
        /// 定义委托
        /// </summary>
        public delegate void refresh();
        /// <summary>
        /// 定义事件，刷新主窗口中的菜单栏控件
        /// </summary>
        public event refresh myRefresh;

        /// <summary>
        /// 打开监控窗口
        /// </summary>
        public event refresh showMonitorWindow;


        public FormLogIn()
        {
            InitializeComponent();
            InitControls();
            LoadLogonRecords();
            this.btn_LogIn.TabIndex = 0;

        }

        /// <summary>
        /// 初始化控件
        /// </summary>
        private void InitControls()
        {
            this.panelEnhanced1.Opacity = 0;
            this.panelEnhanced1.Controls.Add(this.panel1);
            Rectangle screenArea = System.Windows.Forms.Screen.GetWorkingArea(this);  //这个区域不包含任务栏
            int width = screenArea.Width;
            int height = screenArea.Height;
            Point point = new Point();
            point.X = (width/2) - (this.panelEnhanced1.Width /2);
            point.Y = (height / 2) - (this.panelEnhanced1.Height / 2) - 50;
            this.panelEnhanced1.Location = point;
        }

        private void btn_LogIn_Click(object sender, EventArgs e)
        {
            if (txt_PassWord.Text.Trim() == "" || txt_Account.Text.Trim() == "")
            {
                DevExpress.XtraEditors.XtraMessageBox.Show("用户名或密码不能为空。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            try
            {
                userid = txt_Account.Text.Trim();
                passwordMD5 = EncodeHelper.EncryptString(txt_PassWord.Text);

                string message = null;
                bool flag = BLLFactory<BlAuthoryUser>.Instance.VerifyLogin(userid, passwordMD5, out message);
                if (flag)
                {
                    SysEnvironment.CurrentLoginID = userid;
                    SysEnvironment.passWordMD5 = passwordMD5;
                    RecordLogonUser();
                    if (myRefresh != null)
                    {
                        myRefresh();
                    }
                    if (showMonitorWindow != null)
                    {
                        showMonitorWindow();
                    }
                }
                else
                {
                    DevExpress.XtraEditors.XtraMessageBox.Show(message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
            }
            catch (Exception ex)
            {
                LogHelper.log.Error(string.Format("登录出现错误：{0}", ex.ToString()));
            }
            finally
            {
                this.Close();
            }
        }

        /// <summary>
        /// 加载用户登录记录信息
        /// </summary>
        private void LoadLogonRecords()
        {
            try
            {
                if (File.Exists(logonRecordsPath))
                {
                    Permission permission = XmlHelper.XmlDeserialize(logonRecordsPath, typeof(Permission)) as Permission;
                    if (string.IsNullOrEmpty(permission.userInfo.LoginID) && string.IsNullOrEmpty(permission.userInfo.LoginPassWord))
                    {
                        this.check_PassWord.CheckState = CheckState.Unchecked;
                        return;
                    }
                    this.txt_Account.Text = permission.userInfo.LoginID;
                    this.txt_PassWord.Text = EncodeHelper.DecryptString(permission.userInfo.LoginPassWord, true);
                    this.check_PassWord.CheckState = CheckState.Checked;
                }
            }
            catch (Exception ex)
            {
                LogHelper.log.Error(string.Format("登录出现错误：{0}", ex.ToString()));
            }

        }

        /// <summary>
        /// 记录登录用户ID
        /// </summary>
        private void RecordLogonUser()
        {
            if (check_PassWord.CheckState != CheckState.Checked)
            {
                if (File.Exists(logonRecordsPath))
                {
                    XmlHelper xml = new XmlHelper(logonRecordsPath);
                    xml.Replace("/Permission/User/LoginID", "");
                    xml.Replace("/Permission/User/LoginPassWord", "");
                    xml.Save();
                }
            }
            else if (check_PassWord.CheckState == CheckState.Checked)
            {
                if (File.Exists(logonRecordsPath))
                {
                    XmlHelper xml = new XmlHelper(logonRecordsPath);
                    string account = xml.GetElementData("/Permission/User", "LoginID");
                    if (account != userid)
                    {
                        xml.Replace("/Permission/User/LoginID", userid);
                        xml.Replace("/Permission/User/LoginPassWord", passwordMD5);
                        xml.Save();
                    }
                    else
                    {
                        xml.Replace("/Permission/User/LoginPassWord", passwordMD5);
                        xml.Save();
                    }
                }
                else
                {
                    User user = new User { LoginID = userid, LoginPassWord = passwordMD5 };
                    Permission permission = new Permission { userInfo = user };
                    bool flag = XmlHelper.XmlSerialize(logonRecordsPath, permission, typeof(Permission));
                    if (!flag)
                    {
                        DevExpress.XtraEditors.XtraMessageBox.Show("记住密码失败。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                }
            }

        }

        private void txt_Account_TextChanged(object sender, EventArgs e)
        {
            this.txt_PassWord.Text = null;
            this.check_PassWord.CheckState = CheckState.Unchecked;
        }

       
    }
}