///
/// Copyright (c) 2013-2016 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using TBF.Resources;


namespace TBF.Forms
{
    /// <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 fields
        string alias;
        string password;
        string benchName = null;

        // 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 Config.Entities.LoginMethod Method;

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

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

		private void LoginDlgWithBenchSelection_Load(object sender, EventArgs e)
		{
			Localize();
#if DEBUG
			userNameTextBox.Text = "milan";
			passwordTextBox.Text = "napajedla";
#endif
			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;
                }
            }
        }

		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;
		}

		string GetAliasLabel()
		{
			switch (Method)
			{
				default:
				case Config.Entities.LoginMethod.UserName: return Strings.User_name;
				case Config.Entities.LoginMethod.FullName: return Strings.Full_name;
				case Config.Entities.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();

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