using System;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Windows.Forms;
using UAS_LabelMachine.Entity;

namespace UAS_LabelMachine
{
    public partial class Login : Form
    {
        DataHelper dh;
        DataTable dt;
        public Login()
        {
            InitializeComponent();
            StartPosition = FormStartPosition.CenterScreen;
        }

        protected override void WndProc(ref Message m)
        {
            //拦截双击标题栏、移动窗体的系统消息  
            if (m.Msg != 0xA3)
                base.WndProc(ref m);
        }

        private void Login_Load(object sender, EventArgs e)
        {
            dh = new DataHelper();
            //获取账套信息
            dt = (DataTable)dh.ExecuteSql("select ma_function,ms_pwd,ma_user from datacenter.master where ma_enable<>0", "select");
            MasterCombox.DisplayMember = "ma_function";
            MasterCombox.ValueMember = "ma_user";
            MasterCombox.DataSource = dt;
            //读取上次登陆时的用户名和选择的账套
            UserName.Text = Properties.Settings.Default.LastLoginUser;
            MasterCombox.Text = Properties.Settings.Default.LastLoginMaster;
            IP.Text = Properties.Settings.Default.IPAddress;
            //如果上次的用户名不为空则直接跳到密码输入框
            if (UserName.Text != "")
                PassWord.Select();
            if (!Directory.Exists("Log"))//若文件夹不存在则新建文件夹   
                Directory.CreateDirectory("Log"); //新建文件夹   
            string sysdisc = Environment.GetEnvironmentVariable("windir").Substring(0, 1);
            if (!Directory.Exists(sysdisc + @":\打印标签"))
                Directory.CreateDirectory(sysdisc + @":\打印标签");
            FileStream fs = new FileStream("Log/" + DateTime.Now.ToString("yyyy-MM-dd") + ".txt", FileMode.OpenOrCreate, FileAccess.ReadWrite);
        }

        private void LoginIcon_Click(object sender, EventArgs e)
        {
            //根据匹配的账套在DataTable查找到对应的密码
            string Ms_Pwd = "";
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                if (MasterCombox.SelectedValue == dt.Rows[i]["ma_user"])
                    Ms_Pwd = dt.Rows[i]["ms_pwd"].ToString();
            }
            //切换至用户选择的数据源
            string ConnectionString = "Data Source=" + IP.Text + "/orcl;User ID=" + MasterCombox.SelectedValue + ";PassWord=" + Ms_Pwd;
            DataHelper.DBConnectionString = ConnectionString;
            //设置了Connection，重新执行构造函数，重置数据库连接
            dh = new DataHelper();
            if (dh.CheckExist("employee", "em_code='" + UserName.Text + "' and em_password='" + PassWord.Text + "'"))
            {
                dt = (DataTable)dh.ExecuteSql("select em_name,em_type from employee where em_code='" + UserName.Text + "'", "select");
                User.UserName = dt.Rows[0]["em_name"].ToString();
                User.UserCode = UserName.Text;
                User.UserAccountType = dt.Rows[0]["em_type"].ToString();
                //保存此次登陆的用户名和密码
                Properties.Settings.Default.LastLoginUser = UserName.Text;
                Properties.Settings.Default.LastLoginMaster = MasterCombox.Text;
                Properties.Settings.Default.IPAddress = IP.Text;
                Properties.Settings.Default.Save();
                //弹出标签打印的主界面
                UAS_出货标签打印 main = new UAS_出货标签打印();
                main.StartPosition = FormStartPosition.CenterScreen;
                Hide();
                main.ShowDialog();
                Close();
            }
            else
                MessageBox.Show("用户名或者密码错误！");
        }

        /// <summary>
        /// 绘制蓝色的背景图
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Login_Paint(object sender, PaintEventArgs e)
        {
            //简单的画一个浅蓝色的背景
            Graphics g = e.Graphics;
            GraphicsPath Rect = new GraphicsPath();
            Pen p = new Pen(Color.CadetBlue, 2);
            Rectangle rect = new Rectangle(141, 80, 600, 300);
            LinearGradientBrush b3 = new LinearGradientBrush(rect, Color.AliceBlue, Color.LightBlue, LinearGradientMode.Vertical);
            g.FillRectangle(b3, rect);
            e.Graphics.DrawRectangle(p, rect);
        }

        private void PassWord_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                LoginIcon_Click(sender, e);
            }
        }

        private void Login_FormClosing(object sender, FormClosingEventArgs e)
        {
            Application.Exit();
        }

        private void IP_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
                DataHelper.DBConnectionString = "Data Source=" + IP.Text + "/orcl;User ID=DATACENTER;PassWord=select!#%*(";
        }
    }
}