///
/// Copyright (c) 2013-2018 Sensus Slovensko a.s.
///
using System;
using System.Windows.Forms;
using log4net;
using TBF.Resources;
using GemCard;
using System.Drawing;


namespace TBF.UI.Shared
{
    /// <summary>
    /// Provides login dialog that includes test bench selection.
    /// It is used only once on program startup. Does not do authorisation
    /// as User.users have not been loadded from the DB yet.
    /// </summary>
    public partial class LoginDlgWithBenchSelection : Form
    {
        private static readonly ILog log = LogManager.GetLogger(typeof(LoginDlgWithBenchSelection));

        public const string UseTheTagPassword = "UseTheTag0293578";

        /// Private fields
        string alias;
        string password;
        string benchName = null;
        string legalizator;

        /// Smart card support, card S/N is used as user.Tag
        GemCard.CardNative card;
        string smartCardReader;

        /// Readonly public properties to do the authorization.
        public string Alias { get { return alias; } }
        public string Password { get { return password; } }
        public string BenchName { get { return benchName; } }
		public Common.LoginMethod Method;
        public string Legalizator { get { return legalizator; } }

        /// <summary>
        /// Constructor.
        /// </summary>
        public LoginDlgWithBenchSelection()
        {
            InitializeComponent();
		}

        /// <summary>
        /// Constructor with a predefined bench.
        /// </summary>
        public LoginDlgWithBenchSelection(string predefinedBench)
			: this()
        {
            benchName = predefinedBench;

#if LANG_PL || BAHRAIN_50
            Height = 156;
            EnableAndPrepareLegalizatorCombo(legalizatorComboBox);
#else
            legalizator = string.Empty;
#endif
        }

        /// <summary>
        /// Load Legalizator order combo box items from the LocalSettings LastLegalizators array
        /// </summary>
        /// <param name="orderComboBox">Legalizator ComboBox</param>
        void EnableAndPrepareLegalizatorCombo(ComboBox comboBox)
        {
            legalizatorLabel.Visible = true;
            legalizatorComboBox.Visible = true;
            legalizatorComboBox.Enabled = true;

            for (int i = 0; i < Program.LocalSettings.LastLegalizatorsCount; i++)
            {
                comboBox.Items.Add(Program.LocalSettings.LastLegalizators[i]);
            }

            legalizator = (comboBox.Items.Count > 0) ? Program.LocalSettings.LastLegalizators[0] : string.Empty;
            comboBox.Text = legalizator;
        }


        private void LoginDlgWithBenchSelection_Load(object sender, EventArgs e)
        {
			Localize();
#if DEBUG
			userNameTextBox.Text = "milan";
			passwordTextBox.Text = "kremik";
#endif
            Array.Sort(Program.LocalSettings.TestBenches); 
			for (int i = 0; i < Program.LocalSettings.BenchesCount; i++)
            {
                testBenchComboBox.Items.Add(Program.LocalSettings.TestBenches[i].BenchName);
                if (benchName != null && benchName == Program.LocalSettings.TestBenches[i].BenchName)
                {
                    testBenchComboBox.Text = benchName;
                }
            }

            smartCardReader = null;             /// null = No smart card reader detected

#if TURA_IPERL || TURA_IPERL_NEW || TURA_SPECIAL
            try
            {
                card = new CardNative();

                /// Find NFC smart card reader
                string[] cardReaders = card.ListReaders();
                if (cardReaders != null)
                {
                    foreach (var crd in cardReaders)
                    {
                        log.WarnFormat("SMART card reader found: {0}", crd);
                    }

                    foreach (var crd in cardReaders)
                    {
                        if (crd.Contains("NFC"))
                        {
                            log.ErrorFormat("SMART card reader selected: {0}", crd);
                            smartCardReader = crd;  /// NFC smart card reader detected
                            break;
                        }
                    }
                }

                if (!string.IsNullOrEmpty(smartCardReader))
                {
                    /// Reader found, initialize NFC smart card reader

                    card.OnCardInserted += delegate(object sndr, CardInsertedEventArgs args)
                    {
                        if (InvokeRequired) { Invoke(new EventHandler<CardInsertedEventArgs>(OnCardInserted), sndr, args); }
                        else OnCardInserted(sndr, args);
                    };

                    card.OnCardRemoved += delegate(object sndr, CardRemovedEventArgs args)
                    {
                        if (InvokeRequired) { Invoke(new EventHandler<CardRemovedEventArgs>(OnCardRemoved), sndr, args); }
                        else OnCardRemoved(sndr, args);
                    };

                    card.StartCardEvents(smartCardReader);

                    Text += " (NFC)";
                }
            }
            catch (Exception)
            {
                smartCardReader = null;
            }
#endif
        }

		void Localize()
		{
			Text = Strings.User_Login + " TBF v." + Program.Version;
			aliasLabel.Text = GetAliasLabel();
			passwordLabel.Text = Strings.Password;
			testBenchLabel.Text = Strings.Test_bench;
			okButton.Text = Strings.OkBtnText;
			cancelButton.Text = Strings.CancelBtnText;
            legalizatorLabel.Text = Strings.Legalizator;
		}

		string GetAliasLabel()
		{
			switch (Method)
			{
				default:
				case Common.LoginMethod.UserName: return Strings.User_name;
				case Common.LoginMethod.FullName: return Strings.Full_name;
				case Common.LoginMethod.Number: return Strings.User_code;
			}
		}

        /// <summary>
        /// OK clicked (authorization is done outside this dialog).
        /// </summary>

        private void okButton_Click(object sender, EventArgs e)
        {
            if (testBenchComboBox.SelectedItem != null)
            {
                alias = userNameTextBox.Text;
                password = passwordTextBox.Text;
                benchName = testBenchComboBox.SelectedItem.ToString();
                if (legalizatorComboBox.Visible && legalizatorComboBox.Enabled)
                {
                    legalizator = legalizatorComboBox.Text;
                    Program.LocalSettings.UpdateHistory(legalizator, ref Program.LocalSettings.LastLegalizators);
                }

                DialogResult = DialogResult.OK;
                Close();
                return;
            }
            else
            {
                MessageBox.Show(Strings.PLs_select_testbench, Strings.Warning, MessageBoxButtons.OK);
            }
        }

        /// <summary>
        /// Cancel clicked.
        /// </summary>
        private void cancelButton_Click(object sender, EventArgs e)
        {
            DialogResult = DialogResult.Cancel;
            Close();
            return;
        }

        private void passwordTextBox_TextChanged(object sender, EventArgs e)
        {
            if (passwordTextBox.Text != "")
            {
                this.AcceptButton = okButton;
            }
        }

        private void userNameTextBox_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (Convert.ToInt32(e.KeyChar) == 13) 
            {
                passwordTextBox.Focus();
            }
        }

        private void passwordTextBox_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (Convert.ToInt32(e.KeyChar) == 13)
            {
                okButton_Click(sender, e);
            }
        }

		private void aliasLabel_Click(object sender, EventArgs e)
		{
			Method++;
			if (Method == Common.LoginMethod.Count)
				Method = 0;
			aliasLabel.Text = GetAliasLabel();
		}



        void OnCardInserted(object sender, CardInsertedEventArgs args)
        {
            string tag = string.Empty;
            try
            {
                BackColor = Color.Green;
                card.Connect(smartCardReader, SHARE.Shared, PROTOCOL.T0orT1);

                /// Read the serial number of the card
                APDUResponse response = card.Transmit(new APDUCommand(0xFF, 0xCA, 0x00, 0x00, null, 7));
                tag = response.ToString();

                card.Disconnect(DISCONNECT.Leave);
            }
            catch
            {
                tag = string.Empty;
            }

            if (testBenchComboBox.SelectedItem != null)
            {
                alias = tag;
                password = UseTheTagPassword;
                benchName = testBenchComboBox.SelectedItem.ToString();
                if (legalizatorComboBox.Enabled)
                {
                    legalizator = legalizatorComboBox.Text;
                    Program.LocalSettings.UpdateHistory(legalizator, ref Program.LocalSettings.LastLegalizators);
                }

                DialogResult = DialogResult.OK;
                Close();
                return;
            }
            else
            {
                MessageBox.Show(Strings.PLs_select_testbench, Strings.Warning, MessageBoxButtons.OK);
            }
        }


        void OnCardRemoved(object sender, CardRemovedEventArgs args)
        {
            BackColor = SystemColors.Control;
        }

        private void LoginDlgWithBenchSelection_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!string.IsNullOrEmpty(smartCardReader))
            {
                try { card.StopCardEvents(); }
                catch { }
            }
        }
    }
}