/* Copyright (c) Citrix Systems Inc. 
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met: 
 * 
 * *   Redistributions of source code must retain the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer. 
 * *   Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the 
 *     following disclaimer in the documentation and/or other 
 *     materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
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 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using XenAdmin.Properties;
using XenAdmin.Actions;
using XenAPI;
using System.Text.RegularExpressions;


namespace XenAdmin.Dialogs.OptionsPages
{
    public partial class ConnectionOptionsPage : UserControl, IOptionsPage
    {
        private const string ConnectionTabSettingsHeader = "Connection Tab Settings -";
        private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
        private OptionsDialog optionsDialog;

        public ConnectionOptionsPage()
        {
            InitializeComponent();

            build();
        }

        public OptionsDialog OptionsDialog
        {
            set { this.optionsDialog = value; }
        }

        private void build()
        {
            // Proxy server
            switch (Properties.Settings.Default.ProxySetting)
            {
                case 0:
                    DirectConnectionRadioButton.Checked = true;
                    break;
                case 1:
                    UseIERadioButton.Checked = true;
                    break;
                case 2:
                    UseProxyRadioButton.Checked = true;
                    break;
                default:
                    DirectConnectionRadioButton.Checked = true;
                    break;
            }

            ProxyAddressTextBox.Text    = Properties.Settings.Default.ProxyAddress;
            ProxyPortTextBox.Text       = Properties.Settings.Default.ProxyPort.ToString();
            BypassLocalCheckBox.Checked = Properties.Settings.Default.BypassProxyForLocal;
            ProxyAddressLabel.Enabled   = UseProxyRadioButton.Checked;
            ProxyAddressTextBox.Enabled = UseProxyRadioButton.Checked;
            ProxyPortLabel.Enabled      = UseProxyRadioButton.Checked;
            ProxyPortTextBox.Enabled    = UseProxyRadioButton.Checked;
            BypassLocalCheckBox.Enabled = UseProxyRadioButton.Checked;

            ConnectionTimeoutNud.Value  = Properties.Settings.Default.ConnectionTimeout / 1000;
        }

        private void UseProxyRadioButton_CheckedChanged(object sender, EventArgs e)
        {
            ProxyAddressLabel.Enabled = UseProxyRadioButton.Checked;
            ProxyAddressTextBox.Enabled = UseProxyRadioButton.Checked;
            ProxyPortLabel.Enabled = UseProxyRadioButton.Checked;
            ProxyPortTextBox.Enabled = UseProxyRadioButton.Checked;
            BypassLocalCheckBox.Enabled = UseProxyRadioButton.Checked;
            enableOK();
        }

        private void ProxyAddressTextBox_TextChanged(object sender, EventArgs e)
        {
            enableOK();
        }

        private void ProxyPortTextBox_TextChanged(object sender, EventArgs e)
        {
            enableOK();
        }

        private void enableOK()
        {
            if (optionsDialog == null)
                return;

            if (!UseProxyRadioButton.Checked)
            {
                optionsDialog.okButton.Enabled = true;
                return;
            }

            try
            {
                if (!Util.IsValidPort(ProxyPortTextBox.Text))
                {
                    optionsDialog.okButton.Enabled = false;
                    return;
                }

                var uriHostNameType = Uri.CheckHostName(ProxyAddressTextBox.Text);

                optionsDialog.okButton.Enabled =  uriHostNameType != UriHostNameType.Unknown && uriHostNameType != UriHostNameType.IPv6;
                return;
            }
            catch
            {
                optionsDialog.okButton.Enabled = false;
            }
        }

        public static void Log()
        {
            log.Info(ConnectionTabSettingsHeader);
            // Proxy server
            log.Info("=== ProxySetting: " + Properties.Settings.Default.ProxySetting.ToString());
            log.Info("=== ProxyAddress: " + Properties.Settings.Default.ProxyAddress.ToString());
            log.Info("=== ProxyPort: " + Properties.Settings.Default.ProxyPort.ToString());
            log.Info("=== BypassProxyForLocal: " + Properties.Settings.Default.BypassProxyForLocal.ToString());
            log.Info("=== ConnectionTimeout: " + Properties.Settings.Default.ConnectionTimeout.ToString());
        }

        #region IOptionsPage Members

        public void Save()
        {
            // Proxy server
            HTTPHelper.ProxyStyle new_proxy_style =
                DirectConnectionRadioButton.Checked ? HTTPHelper.ProxyStyle.DirectConnection :
                UseIERadioButton.Checked ? HTTPHelper.ProxyStyle.SystemProxy :
                                                      HTTPHelper.ProxyStyle.SpecifiedProxy;
            
            if (Properties.Settings.Default.ProxySetting != (int)new_proxy_style)
                Properties.Settings.Default.ProxySetting = (int)new_proxy_style;
            
            if (ProxyAddressTextBox.Text != Properties.Settings.Default.ProxyAddress && ProxyAddressTextBox.Text != "")
                Properties.Settings.Default.ProxyAddress = ProxyAddressTextBox.Text;

            if (new_proxy_style == HTTPHelper.ProxyStyle.SpecifiedProxy)
            {
                SetSpecifiedProxySettings();
            }

            int timeout = (int)ConnectionTimeoutNud.Value;
            if (timeout * 1000 != Properties.Settings.Default.ConnectionTimeout)
            {
                Properties.Settings.Default.ConnectionTimeout = timeout * 1000;
            }

            Program.ReconfigureConnectionSettings();
            new TransferProxySettingsAction((HTTPHelper.ProxyStyle)Properties.Settings.Default.ProxySetting,
                                            Properties.Settings.Default.ProxyAddress,
                                            Properties.Settings.Default.ProxyPort,
                                            Properties.Settings.Default.ConnectionTimeout,
                                            Properties.Settings.Default.BypassProxyForLocal,
                                            true).RunAsync();
        }

        private void SetSpecifiedProxySettings()
        {
            if (int.Parse(ProxyPortTextBox.Text) != Properties.Settings.Default.ProxyPort)
            {
                try
                {
                    Properties.Settings.Default.ProxyPort = int.Parse(ProxyPortTextBox.Text);
                }
                catch
                {
                    Properties.Settings.Default.ProxyPort = 80;
                }
            }

            if (BypassLocalCheckBox.Checked != Properties.Settings.Default.BypassProxyForLocal)
                Properties.Settings.Default.BypassProxyForLocal = BypassLocalCheckBox.Checked;
        }

        #endregion

        #region VerticalTab Members

        public override string Text
        {
            get { return Messages.CONNECTION; }
        }

        public string SubText
        {
            get { return Messages.CONNECTION_DESC; }
        }

        public Image Image
        {
            get { return Resources._000_Network_h32bit_16; }
        }

        #endregion
    }
}