using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace ImpulseVision
{
    public partial class FormAutorize : Form
    {
        public FormAutorize()
        {
            InitializeComponent();

            TbxLogin.Focus();
            TbxLogin.SelectionStart = 0;
        }
        #region <Переменные>
        SqlConnection SCon = new SqlConnection(Properties.Settings.Default.ImpulseVisionAppConnectionString);
        #endregion
        private void BtnLogin_Click(object sender, EventArgs e)
        {
            if(TbxLogin.Text.Trim() == string.Empty || TbxPassword.Text.Trim() == string.Empty)
            {
                MessageBox.Show("Введите учётные данные и повторите попытку!", "ImpulseVision", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                return;
            }

            BsUsers.Filter = $"Login = '{TbxLogin.Text.Trim()}' and Password = '{TbxPassword.Text.Trim()}'";

            if (BsUsers.Count == 0)
            {
                MessageBox.Show("Пользователя с таким логином или паролем не существует!", "ImpilseVision", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                return;
            }
            else
            {
                Notify.Visible = false;
                try
                {
                    SCon.Open();
                    string QueryLogining = $@"insert into HistoryLogin (StaffsID, TimeLogin)
values ('{LblUserID.Text.Trim()}',GETDATE())";

                    SqlCommand Cmd = new SqlCommand(QueryLogining, SCon);
                    Cmd.ExecuteNonQuery();
                    SCon.Close();
                }
                catch
                {
                    MessageBox.Show("Сервер не отвечает..\r\nПовторите попытку позже", "ImpulseVision", MessageBoxButtons
                        .OK, MessageBoxIcon.Exclamation);
                    return;
                }

                if (LblRole.Text == "1")
                {
                    this.Hide();
                    FormMain FMain = new FormMain();
                    FMain.BsAdministrator.Filter = BsUsers.Filter;
                    FMain.ShowDialog();
                    this.Show();
                }
                else
                {
                    this.Hide();
                    FormGuard FGuard = new FormGuard();
                    FGuard.BsStaffs.Filter = BsUsers.Filter;
                    FGuard.ShowDialog();
                    this.Show();
                }

                Notify.Visible = true;
                TbxLogin.Text = string.Empty;
                TbxPassword.Text = string.Empty;

                this.staffsTableAdapter.Fill(this.impulseVisionAppDataSet1.Staffs);

                GetLastTimeLogin();
            }
        }

        private void FormAutorize_FormClosing(object sender, FormClosingEventArgs e)
        {
            if(File.Exists(Application.StartupPath+"\\autorun.txt"))
            {
                this.WindowState = FormWindowState.Minimized;
                this.Hide();
                Notify.Visible = true;
            }
            else
            {
                Application.ExitThread();
            }
        }

        private void FormAutorize_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'impulseVisionAppDataSet1.Staffs' table. You can move, or remove it, as needed.
            try
            {
                this.staffsTableAdapter.Fill(this.impulseVisionAppDataSet1.Staffs);
            }
            catch
            {
                MessageBox.Show("Проверьте подключение к сети интернет и повторите попытку!", "ImpulseVision", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

                Application.ExitThread();
            }
            FormStart FStart = new FormStart();
            FStart.ShowDialog();

            ApplicationParameters application = new ApplicationParameters();

            ClearOldRecordInJournal(application.CountDay);

            GetLastTimeLogin();

            LblRole.Hide();
            LblUserID.Hide();

            if (File.Exists(Application.StartupPath + "\\autorun.txt"))
            {
                Notify.Visible = true;
            }
        }
        /// <summary>
        /// получение последнего времени входа
        /// </summary>
        private void GetLastTimeLogin()
        {
            string LastLogin = string.Empty;
            SCon.Open();
            string QueryLastLogin = $@"select Max(TimeLogin) as LastTimeLogin
from HistoryLogin";
            SqlCommand Cmd = new SqlCommand(QueryLastLogin, SCon);
            SqlDataReader Res = Cmd.ExecuteReader();
            if(Res.HasRows)
            {
                Res.Read();
                LastLogin = "Последнее время входа: " + Res["LastTimeLogin"].ToString();
            }
            else
            {
                LastLogin = "Здесь будет отображаться последнее время входа в систему.";
            }
            SCon.Close();

            Card.TextDescrition = LastLogin;
        }
        /// <summary>
        /// удаление фотографий в журнале,
        /// которые старше указанного количества дней
        /// </summary>
        private void ClearOldRecordInJournal(int CountDay)
        {
            if (!Directory.Exists(Application.StartupPath + "\\Source\\log"))
            {
                return;
            }
            DirectoryInfo Dir = new DirectoryInfo(Application.StartupPath + "\\Source\\log\\");
            FileInfo[] Files = Dir.GetFiles();
            string Path = string.Empty;
            foreach (var t in Files)
            {
                Path = Application.StartupPath + "\\Source\\log\\" + t;
                if (!File.Exists(Path))
                    continue;

                string[] Parts = t.ToString().Split('_');
                try
                {
                    DateTime Tm = DateTime.Parse(Parts[3]);
                    TimeSpan Span = DateTime.Now - Tm;
                    int Dif = Span.Days;
                    if(Dif > CountDay)
                    {
                        File.Delete(Path);
                    }
                }
                catch
                {
                    continue;
                }
            }
        }

        /// <summary>
        /// рисование градиентной заливки на форме
        /// </summary>
        private void FormAutorize_Paint(object sender, PaintEventArgs e)
        {
            Point PtStart = new Point(0, 0);
            Point PtEnd = new Point(Width, Height);
            Color ColFirst = ColorTranslator.FromHtml("#0F2834");
            Color ColThird = ColorTranslator.FromHtml("#496870");
            //градиентный цвет
            LinearGradientBrush LGB = new LinearGradientBrush(PtStart, PtEnd, ColFirst, ColThird);

            Pen MyPen = new Pen(LGB);

            Rectangle Rect = new Rectangle(PtStart,new Size(PtEnd));
            e.Graphics.FillRectangle(LGB, Rect);
        }

        private void FormAutorize_Resize(object sender, EventArgs e)
        {
            Invalidate();
        }

        private void Notify_MouseClick(object sender, MouseEventArgs e)
        {
            if (this.WindowState == FormWindowState.Minimized)
            {
                this.ShowInTaskbar = true;
                this.Show();
                this.WindowState = FormWindowState.Normal;

            }
            else
            {
                this.WindowState = FormWindowState.Minimized;
                this.Hide();
            }
            Notify.Visible = true;
        }

        private void CbxShowPass_CheckedChanged(object sender, EventArgs e)
        {
            TbxPassword.UseSystemPasswordChar = !CbxShowPass.Checked;
        }
    }
}