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

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Windows.Forms;
using XenAdmin.Controls;
using XenAdmin.Core;
using XenAPI;
using XenAdmin.Alerts;

namespace XenAdmin.Wizards.PatchingWizard
{
    public partial class PatchingWizard_ModePage : XenTabPage
    {
        private bool _tooltipShowing;

        public XenServerPatchAlert SelectedUpdateAlert { private get; set; }

        public PatchingWizard_ModePage()
        {
            InitializeComponent();          
        }

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

        public override string PageTitle
        {
            get { return Messages.PATCHINGWIZARD_MODEPAGE_TITLE; }
        }

        public override string HelpID
        {
            get { return "UpdateMode"; }
        }

        public override bool EnablePrevious()
        {
            return true;
        }

        public override string NextText(bool isLastPage)
        {
            return Messages.UPDATES_WIZARD_APPLY_UPDATE;
        }

        public Dictionary<string, livepatch_status> LivePatchCodesByHost
        {
            get;
            set;
        }

        public Pool_update PoolUpdate
        {
            private get;
            set;
        }

        public override void PageLoaded(PageLoadedDirection direction)
        {
            base.PageLoaded(direction);

            textBoxLog.Clear();

            var unknownType = false;

            var someHostMayRequireRestart = false; // If a host has restartHost guidance, even if is a live patch,  we want this true (as live patch may fail)

            switch (SelectedUpdateType)
            {
                case UpdateType.NewRetail:
                case UpdateType.Existing:
                    textBoxLog.Text = PatchingWizardModeGuidanceBuilder.ModeRetailPatch(SelectedServers, Patch, out someHostMayRequireRestart);
                    break;
                case UpdateType.ISO:
                    AutomaticRadioButton.Enabled = true;
                    AutomaticRadioButton.Checked = true;
                    textBoxLog.Text = PoolUpdate != null 
                        ? PatchingWizardModeGuidanceBuilder.ModeRetailPatch(SelectedServers, PoolUpdate, LivePatchCodesByHost, out someHostMayRequireRestart)
                        : PatchingWizardModeGuidanceBuilder.ModeSuppPack(SelectedServers, out someHostMayRequireRestart);
                    break;
                default:
                    unknownType = true;
                    break;
            }
            
            var automaticDisabled = unknownType || (AnyPoolForbidsAutoRestart() && someHostMayRequireRestart);

            AutomaticRadioButton.Enabled = !automaticDisabled;
            AutomaticRadioButton.Checked = !automaticDisabled;
            ManualRadioButton.Checked = automaticDisabled;

            if (automaticDisabled)
            {
                tableLayoutPanel1.MouseMove += tableLayoutPanel1_MouseMove;
            }

            if (SelectedUpdateType == UpdateType.ISO || SelectedServers.Exists(server => !Helpers.ClearwaterOrGreater(server)))
            {
                removeUpdateFileCheckBox.Checked = false;
                removeUpdateFileCheckBox.Visible = false;
            }
        }

        public override void PageLeave(PageLoadedDirection direction, ref bool cancel)
        {
            tableLayoutPanel1.MouseMove -= tableLayoutPanel1_MouseMove;
            base.PageLeave(direction, ref cancel);
        }

        /// <summary>
        /// Display the tooltip over the automatic radio button only if it is disabled
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tableLayoutPanel1_MouseMove(object sender, MouseEventArgs e)
        {
            var control = tableLayoutPanel1.GetChildAtPoint(e.Location);
            if (control != null && !control.Enabled && control is RadioButton)
            {
                if (_tooltipShowing) return;

                automaticRadioButtonTooltip.Show(Messages.POOL_FORBIDS_AUTOMATIC_RESTARTS,
                    AutomaticRadioButton,
                    e.Location.X, control.Height/2);
                _tooltipShowing = true;
            }
            else
            {
                automaticRadioButtonTooltip.Hide(AutomaticRadioButton);
                _tooltipShowing = false;
            }
        }

        public override bool EnableNext()
        {
            return AutomaticRadioButton.Checked || ManualRadioButton.Checked;
        }

        private void UpdateEnablement()
        {
            textBoxLog.Enabled = ManualRadioButton.Checked;
            OnPageUpdated();
        }

        #region Accessors

        public string ManualTextInstructions
        {
            get
            {
                return textBoxLog.Text;
            }
        }

        public bool IsAutomaticMode
        {
            get
            {
                return AutomaticRadioButton.Checked;
            }
        }

        public bool RemoveUpdateFile
        {
            get
            {
                return removeUpdateFileCheckBox.Checked;
            }
        }

        public List<Host> SelectedServers { private get; set; }
        public Pool_patch Patch { private get; set; }
        public UpdateType SelectedUpdateType { private get; set; }

        #endregion

        private void AutomaticRadioButton_CheckedChanged(object sender, EventArgs e)
        {
            UpdateEnablement();
        }

        private void ManualRadioButton_CheckedChanged(object sender, EventArgs e)
        {
            UpdateEnablement();
        }

        private bool AnyPoolForbidsAutoRestart()
        {
            foreach (var server in SelectedServers)
            {
                var pool = Helpers.GetPoolOfOne(server.Connection);
                if (pool.IsAutoUpdateRestartsForbidden)
                {
                    return true;
                }
            }

            return false;
        }
            
        private void button1_Click(object sender, EventArgs e)
        {
            string filePath = Path.GetTempFileName();
            FileStream fileStream = File.Create(filePath);
            StreamWriter sw = new StreamWriter(fileStream);
            sw.Write(textBoxLog.Text);
            sw.Close();
            fileStream.Close();
            Process.Start("notepad.exe", filePath);
        }
    }


}