///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Windows.Forms;
using TBF.Resources;

namespace TBF
{
    /// <summary>
    /// Dialog to edit local settings that specify database parameters (S1.2)
    /// </summary>
    public partial class BenchesDlg : Form
    {
        // Local copy of 'local settings' initialized to Program.localSettings.
        // Dialog modifies this copy and updates Program.localSettings just
        // when 'OK' is pressed.
        LocalSettings localSettings;

        /// <summary>
        /// Constructor, initializes the dialog
        /// </summary>
        public BenchesDlg()
        {
			Program.LocalSettings.Save();
            localSettings = LocalSettings.Load(Program.LocalSettingsFileName);
			if (localSettings == null) throw new Exception("Cannot load local settings");

            InitializeComponent();
            RedrawTestBenchesListBox();
        }

		private void BenchesDlg_Load(object sender, EventArgs e)
		{
			Text = Strings.Database_Settings;
			label1.Text = Strings.Test_Benches_;
			addButton.Text = Strings.AddBtnText;
			copyButton.Text = Strings.CopyBtnText;
			editButton.Text = Strings.EditBtnText;
			removeButton.Text = Strings.RemoveBtnText;
			okButton.Text = Strings.OkBtnText;
			cancelButton.Text = Strings.CancelBtnText;
		}

        void RedrawTestBenchesListBox()
        {
            testBenchesListBox.Items.Clear();
            if (localSettings.TestBenches != null)
            {
                int nrBenches = localSettings.TestBenches.GetLength(0);
                for (int i = 0; i < nrBenches; i++)
                {
                    testBenchesListBox.Items.Add(localSettings.TestBenches[i].BenchName);
                }
            }
        }

        /// <summary>
        /// Create a new test bench DB specification and append it to the list
        /// </summary>
        private void addButton_Click(object sender, EventArgs e)
        {
			Config.DatabaseSettings bench = new Config.DatabaseSettings();
			Forms.DatabaseSettingsDlg dlg = new Forms.DatabaseSettingsDlg(bench);
            DialogResult dr = dlg.ShowDialog();
            if (dr == DialogResult.OK)
            {
                int nrBenches =
                    (localSettings.TestBenches == null) ? 0 : localSettings.TestBenches.GetLength(0);

                if (nrBenches == 0)
                {
					localSettings.TestBenches = new Config.DatabaseSettings[1];
                    localSettings.TestBenches[0] = bench;
                }
                else
                {
					Config.DatabaseSettings[] newTestBenches = new Config.DatabaseSettings[nrBenches + 1];
                    for (int i = 0; i < nrBenches; i++)
                    {
                        newTestBenches[i] = localSettings.TestBenches[i];
                    }
                    newTestBenches[nrBenches] = bench;
                    localSettings.TestBenches = newTestBenches;
                }

                testBenchesListBox.Items.Add(bench.BenchName);
            }
        }

        /// <summary>
        /// Create a new test bench DB specification,which is a copy of the
        /// selected bench, and append it to the list
        /// </summary>
        private void copyButton_Click(object sender, EventArgs e)
        {
            if (testBenchesListBox.SelectedIndex >= 0)
            {
				Config.DatabaseSettings ori = localSettings.TestBenches[testBenchesListBox.SelectedIndex];
				Config.DatabaseSettings bench = (Config.DatabaseSettings)ori.Clone();

				Forms.DatabaseSettingsDlg dlg = new Forms.DatabaseSettingsDlg(bench);
                DialogResult dr = dlg.ShowDialog();
                if (dr == DialogResult.OK)
                {
                    int nrBenches =
                        (localSettings.TestBenches == null) ? 0 : localSettings.TestBenches.GetLength(0);

					Config.DatabaseSettings[] newTestBenches = new Config.DatabaseSettings[nrBenches + 1];
                    for (int i = 0; i < nrBenches; i++)
                    {
                        newTestBenches[i] = localSettings.TestBenches[i];
                    }
                    newTestBenches[nrBenches] = bench;
                    localSettings.TestBenches = newTestBenches;

                    testBenchesListBox.Items.Add(bench.BenchName);
                }
            }
        }

        /// <summary>
        /// Edit selected test bench DB specification
        /// </summary>
        private void editButton_Click(object sender, EventArgs e)
        {
            if (testBenchesListBox.SelectedIndex >= 0)
            {
				Forms.DatabaseSettingsDlg dlg = new Forms.DatabaseSettingsDlg(localSettings.TestBenches[testBenchesListBox.SelectedIndex]);
                DialogResult dr = dlg.ShowDialog();
                if (dr == DialogResult.OK)
                {
                    // Update the item name
                    testBenchesListBox.Items[testBenchesListBox.SelectedIndex] =
                        localSettings.TestBenches[testBenchesListBox.SelectedIndex].BenchName;
                }
            }
        }

        /// <summary>
        /// Remove selected test bench DB specification from the list
        /// </summary>
        private void removeButton_Click(object sender, EventArgs e)
        {
            int selectedIx = testBenchesListBox.SelectedIndex;
            if (selectedIx >= 0)
            {
                int nrBenches =
                    (localSettings.TestBenches == null) ? 0 : localSettings.TestBenches.GetLength(0);

                if (nrBenches == 1)
                {
                    localSettings.TestBenches = null;
                }
                else
                {
					Config.DatabaseSettings[] newTestBenches = new Config.DatabaseSettings[nrBenches - 1];
                    for (int i = 0; i < selectedIx; i++)
                    {
                        newTestBenches[i] = localSettings.TestBenches[i];
                    }
                    for (int i = selectedIx + 1; i < nrBenches; i++)
                    {
                        newTestBenches[i - 1] = localSettings.TestBenches[i];
                    }
                    localSettings.TestBenches = newTestBenches;
                }

                RedrawTestBenchesListBox();
            }
        }

        /// <summary>
        /// Update setting, return 'OK'
        /// </summary>
        private void okButton_Click(object sender, EventArgs e)
        {
			localSettings.Save();
			Program.LocalSettings = LocalSettings.Load(Program.LocalSettingsFileName);
            DialogResult = DialogResult.OK;
            Close();
            return;
        }

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

        /// <summary>
        /// Double click on an item = edit item
        /// </summary>
        private void testBenchesListBox_DoubleClick(object sender, EventArgs e)
        {
            editButton_Click(sender, e);
        }
    }
}