/* 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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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
 * SUCH DAMAGE.
 */

using System;
using System.ComponentModel;
using System.Linq;
using System.Windows.Forms;
using XenAdmin.Actions;
using XenAdmin.Core;
using XenAPI;


namespace XenAdmin.Dialogs
{
    public partial class ChangeServerPasswordDialog : XenDialogBase
    {
        private readonly Host host;
        private readonly Pool pool;

        public ChangeServerPasswordDialog(Host host)
            : base(host.Connection)
        {
            InitializeComponent();
            this.host = host;
            host.PropertyChanged += Server_PropertyChanged;
        }

        public ChangeServerPasswordDialog(Pool pool)
            : base(pool.Connection)
        {
            InitializeComponent();
            this.pool = pool;
            pool.PropertyChanged += Server_PropertyChanged;
        }

        private void Server_PropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            if (e.PropertyName == "name_label")
            {
                Program.Invoke(this, UpdateText);
            }
        }

        private void UpdateText()
        {
            Program.AssertOnEventThread();

            string name = "";

            if (host != null)
            {
                Pool thePool = Helpers.GetPoolOfOne(host.Connection);
                name = thePool.Name();
            }

            if (pool != null)
                name = pool.Name();

            Text = string.Format(Messages.CHANGEPASS_DIALOG_TITLE, name.Ellipsise(30));
        }

        private void okButton_Click(object sender, EventArgs e)
        {
            bool isOldPasswordCorrect = connection != null && oldPassBox.Text == connection.Password;

            // Check old password was correct
            if (!isOldPasswordCorrect)
            {
                currentPasswordError.Visible = true;
                oldPassBox.Focus();
                oldPassBox.SelectAll();
                return;
            }

            // Check new passwords match
            if (!newPassBox.Text.Equals(confirmBox.Text))
            {
                newPasswordError.ShowError(Messages.PASSWORDS_DONT_MATCH);
                newPassBox.Focus();
                newPassBox.SelectAll();
                return;
            }

            new ChangeHostPasswordAction(connection, oldPassBox.Text.ToCharArray(), newPassBox.Text.ToCharArray()).RunAsync();

            DialogResult = DialogResult.OK;
            Close();
        }

        private void cancelButton_Click(object sender, EventArgs e)
        {
            DialogResult = DialogResult.Cancel;
            Close();
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            tableLayoutPanel3.Visible = connection != null && Helpers.StockholmOrGreater(connection) &&
                                        !connection.Cache.Hosts.Any(Host.RestrictPoolSecretRotation);
            UpdateText();
            UpdateButtons();
        }

        protected override void OnClosing(CancelEventArgs e)
        {
            if (host != null)
                host.PropertyChanged -= Server_PropertyChanged;
            if (pool != null)
                pool.PropertyChanged -= Server_PropertyChanged;
            base.OnClosing(e);
        }

        private void oldPassBox_TextChanged(object sender, EventArgs e)
        {
            currentPasswordError.Visible = false;
            UpdateButtons();
        }

        private void newPassBox_TextChanged(object sender, EventArgs e)
        {
            newPasswordError.Visible = false;
            UpdateButtons();
        }

        private void confirmBox_TextChanged(object sender, EventArgs e)
        {
            newPasswordError.Visible = false;
            UpdateButtons();
        }

        private void UpdateButtons()
        {
            okButton.Enabled = !string.IsNullOrEmpty(oldPassBox.Text) &&
                               !string.IsNullOrEmpty(newPassBox.Text) &&
                               !string.IsNullOrEmpty(confirmBox.Text);
        }
    }
}