using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Daniel.Liu.DAO;
using System.Xml;
//0
namespace TiesTest
{
    /// <summary>
    /// 系统登陆
    /// </summary>
    public partial class frmLogin : Form
    {
        LoginUserManage lum = new LoginUserManage();
        public frmLogin()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 用户输入验证
        /// </summary>
        /// <returns></returns>
        private bool UserInputCheck()           //输入为空检查
        {
            // 保存登录名称
            string loginName = this.txtUserID.Text.Trim();
            // 保存用户密码
            string userPwd = this.txtPassword.Text.Trim();
            // 开始验证
            if (string.IsNullOrEmpty(loginName))
            {
                this.toolTip.ToolTipIcon = ToolTipIcon.Info;
                this.toolTip.ToolTipTitle = "登录提示";
                Point showLocation = new Point(this.txtUserID.Location.X + this.txtUserID.Width,this.txtUserID.Location.Y);
                this.toolTip.Show("请您输入登录名称！", this, showLocation, 5000);
                this.txtUserID.Focus();
                return false;
            }
            if (string.IsNullOrEmpty(userPwd))
            {
                this.toolTip.ToolTipIcon = ToolTipIcon.Info;
                this.toolTip.ToolTipTitle = "登录提示";
                Point showLocation = new Point(this.txtPassword.Location.X + this.txtPassword.Width,this.txtPassword.Location.Y);
                this.toolTip.Show("请您输入用户密码！", this, showLocation, 5000);
                this.txtPassword.Focus();
                return false;
            }
            //else if (userPwd.Length < 6)
            //{
            //    this.toolTip.ToolTipIcon = ToolTipIcon.Warning;
            //    this.toolTip.ToolTipTitle = "登录警告";
            //    Point showLocation = new Point(
            //        this.txtUserPwd.Location.X + this.txtUserPwd.Width,
            //        this.txtUserPwd.Location.Y);
            //    this.toolTip.Show("用户密码长度不能小于六位！", this, showLocation, 5000);
            //    this.txtUserPwd.Focus();
            //    return false;
            //}
            // 如果已通过以上所有验证则返回真
            return true;
        }

        private void login()
        {
            string level = "";
            if (lum.IsEnable(txtUserID.Text.Trim()) == false)                               //用户名没被禁用
            {
                MessageBox.Show(Common.UserLevel);
                if (lum.CheckUserPassword(txtUserID.Text.Trim(), txtPassword.Text.Trim(), ref Common.UserLevel))  //验证账户和密码
                //if (lum.CheckUserPassword(txtUserID.Text.Trim(), txtPassword.Text.Trim(), ref level))  //验证账户和密码
                {
                    Common.UserID = txtUserID.Text.Trim();
                    Common.UserName = lum.GetLoginUserName(txtUserID.Text.Trim());          //获取和用户ID对应的用户名
                    WriteLoginUnitXML();                                                    //将本次登陆的用户名与项目名称存起来                                       
                    SysLog.AddOperateLog(Common.UserName, "系统登陆", "", Common.UserID +" "+ Common.UserName + " 用户进入系统", DateTime.Now.ToString());//写日志
                    this.DialogResult = DialogResult.OK;                                        
                }
                else
                {
                    MessageBox.Show("你输入的用户账号或用户密码有错误,请重输!", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Stop);
                    return;
                }
            }
            else
            {
                MessageBox.Show("此用户已禁用，无法登陆系统!", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Stop);
                return;
            }
        }

        private void txtPassword_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar.ToString() == "\r")
            {
                if (UserInputCheck())   // 如果通过输入验证,查空，不为空
                {
                    login();
                }
            }
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            if (UserInputCheck())   // 如果通过输入验证
            {
                login();
            }
        }

        /// <summary>
        /// 绑定下拉列表框，通用方法
        /// </summary>
        //public void cboDataBind(ComboBox obj)
        //{
        //    LoginUserManage lum = new LoginUserManage();
        //    DataTable dtl = lum.GetLoginUserInfo();
        //    ListItem item;
        //    for (int i = 0; i < dtl.Rows.Count; i++)
        //    {
        //        item = new ListItem();
        //        item.Text = dtl.Rows[i]["USERNAME"].ToString();
        //        item.Value = dtl.Rows[i]["USERID"].ToString();
        //        obj.Items.Add(item);
        //    }
        //}

        private void frmLogin_Load(object sender, EventArgs e)
        {
            CommonDataConfig.ConnectionDefaultStr = System.Configuration.ConfigurationSettings.AppSettings["ConnStr"].ToString();   //初始化数据库连接字符串            
            GetLoginUnitXML();                                                                                                      //将上次登陆的用户与项目名称加载出来
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }        

        private void lnkChangePassword_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            frmChangePassword frmcp = new frmChangePassword();
            frmcp.UserID = txtUserID.Text.Trim();
            frmcp.UserName = lum.GetLoginUserName(txtUserID.Text.Trim());
            frmcp.ShowDialog();
        }

        /// <summary>
        /// 取出登陆用户名与项目名称
        /// </summary>
        private void GetLoginUnitXML()
        {
            string fileName = Application.StartupPath + @"\HistoryLogin.xml";
            XmlDocument myXmlDocument = new XmlDocument();
            myXmlDocument.Load(fileName);
            XmlNode rootNode = myXmlDocument.DocumentElement;
            //用户上次登陆账号
            string userid = rootNode.ChildNodes[0].ChildNodes[0].Attributes["value"].Value;
            txtUserID.Text = userid;
        }

        /// <summary>
        /// 将登陆用户与项目名称存入xml中
        /// </summary>
        private void WriteLoginUnitXML()
        {
            string fileName = Application.StartupPath + @"\HistoryLogin.xml";
            XmlDocument myXmlDocument = new XmlDocument();
            myXmlDocument.Load(fileName);
            XmlNode rootNode = myXmlDocument.DocumentElement;
            //用户上次登陆用户名
            rootNode.ChildNodes[0].ChildNodes[0].Attributes["value"].Value = txtUserID.Text;        
            myXmlDocument.Save(Application.StartupPath + @"\HistoryLogin.xml");
        }        


    }
}