/* 
 * Copyright (c) 2009 Craig Sutherland
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

namespace FastForward.Monitor
{
    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Linq;
    using System.Windows.Forms;
    using FastForward.WinCore;
    using FastForward.WinCore.Configuration;
    using Microsoft.Win32;
    using ThoughtWorks.CruiseControl.Remote;
    using ThoughtWorks.CruiseControl.Remote.Monitor;

    /// <summary>
    /// Display the settings for the monitor application.
    /// </summary>
    public partial class SettingsForm 
        : Form
    {
        #region Private fields
        private Dictionary<PluginConfig, Plugin> plugins = new Dictionary<PluginConfig, Plugin>();
        private Dictionary<string, ListViewItem> tabItems = new Dictionary<string, ListViewItem>();
        private string[] allProjectDoubleClickActions = new string[] {
            "(None)", 
            "View Build History", 
            "View Current Status", 
            "View Packages", 
            "View Properties", 
            "View Web Page"
        };
        #endregion

        #region Constructors
        /// <summary>
        /// Initialise a new <see cref="SettingsForm"/>.
        /// </summary>
        /// <param name="configuration"></param>
        public SettingsForm(ApplicationConfig configuration)
        {
            InitializeComponent();

            var clientfactory = new CruiseServerClientFactory();
            Configuration = configuration.Clone();
            var settings = new ClientStartUpSettings
            {
                FetchVersionOnStartUp = false
            };

            foreach (var server in Configuration.Servers)
            {
                // Need to make sure there is a server instance for each item
                var client = clientfactory.GenerateClient(server.Address, server.TargetServer);
                server.Server = new Server(client, settings);
                server.Server.DisplayName = server.Name;

                // Now it can be added to the listview
                serversList.Items.Add(new ServerConfigItem(server));
            }
            foreach (var template in Configuration.BuildTemplates)
            {
                templateList.Items.Add(
                    new ListViewItem(
                        new string[] {
                            template.Name,
                            template.FileName
                        }, "Template"));
            }
            foreach (var plugin in Configuration.LoadedPlugins)
            {
                ListViewItem item;
                try
                {
                    item = GeneratePluginItem(plugin);
                    plugins.Add(plugin, Plugin.StartNew(plugin));
                }
                catch
                {
                    item = new ListViewItem(new string[] {
                        plugin.Type,
                        "Unable to load plug-in!"
                    }, "Error");
                    item.Tag = plugin;
                }
                pluginsList.Items.Add(item);
            }
            foreach (var tab in from record in Configuration.Monitor.Tabs
                                    orderby record.Order
                                    select record)
            {
                AddTabToList(tab);
            }

            // Settings
            showInTaskBar.Checked = Configuration.Monitor.ShowInTaskBar;
            alwaysOnTop.Checked = Configuration.Monitor.AlwaysOnTop;
            pluginLocation.Text = Configuration.DefaultPluginLocation;

            // Load the all projecs double-click action
            allProjectsDoubleClickAction.Items.Clear();
            for (var loop = 0; loop < allProjectDoubleClickActions.Length; loop++)
            {
                var action = allProjectDoubleClickActions[loop];
                allProjectsDoubleClickAction.Items.Add(action);
                if (string.Equals(action, this.Configuration.Monitor.AllProjectsDoubleClickAction))
                {
                    allProjectsDoubleClickAction.SelectedIndex = loop;
                }
            }

            if (allProjectsDoubleClickAction.SelectedIndex < 0)
            {
                allProjectsDoubleClickAction.SelectedIndex = 0;
            }

            // Windows only functionality
            if (EnvironmentUtils.IsRunningOnWindows)
            {
                startAutomatically.Checked = CheckForAutoRun();
            }
            else
            {
                startAutomatically.Visible = false;
            }
        }
        #endregion

        #region Public properties
        #region Configuration
        /// <summary>
        /// The current configuration.
        /// </summary>
        public ApplicationConfig Configuration { get; private set; }
        #endregion
        #endregion

        #region Public events
        #region OkClicked
        /// <summary>
        /// The OK button has been clicked.
        /// </summary>
        public event EventHandler OkClicked;
        #endregion
        #endregion

        #region Private methods
        #region CheckForAutoRun()
        /// <summary>
        /// Checks if this application has been set to run when Windows is started.
        /// </summary>
        /// <returns></returns>
        private bool CheckForAutoRun()
        {
            var hasAutoRun = false;
            var regKey = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", false);
            if (regKey != null)
            {
                hasAutoRun = !string.IsNullOrEmpty((string)regKey.GetValue("FastForward.Monitor"));
            }
            return hasAutoRun;
        }
        #endregion

        #region SetAutoRun()
        /// <summary>
        /// Sets whether this application should start when Windows starts.
        /// </summary>
        /// <param name="hasAutoRun"></param>
        private void SetAutoRun(bool hasAutoRun)
        {
            var regKey = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Run", true);
            if (regKey != null)
            {
                if (hasAutoRun)
                {
                    regKey.SetValue("FastForward.Monitor", System.Windows.Forms.Application.ExecutablePath);
                }
                else
                {
                    regKey.DeleteValue("FastForward.Monitor", false);
                }
            }
        }
        #endregion

        #region ShowProjectsForServer()
        /// <summary>
        /// Display the projects that are available for a server.
        /// </summary>
        private void ShowProjectsForServer()
        {
            if (serversList.SelectedItems.Count == 1)
            {
                var item = serversList.SelectedItems[0] as ServerConfigItem;
                var form = new ServerProjectsForm(item.Server);
                form.ShowDialog(this);
            }
            else
            {
                MessageBox.Show(this, 
                    "You must select a server first", 
                    "Unable to configure server",
                    MessageBoxButtons.OK, 
                    MessageBoxIcon.Warning);
            }
        }
        #endregion

        #region GeneratePluginItem()
        /// <summary>
        /// Generates a <see cref="ListViewItem"/> for a plugin configuration.
        /// </summary>
        /// <param name="config"></param>
        /// <returns></returns>
        private ListViewItem GeneratePluginItem(PluginConfig config)
        {
            // Retrieve the name and description
            var type = Plugin.RetrieveType(config);
            var name = Plugin.RetrieveName(type);
            var description = Plugin.RetrieveDescription(type);

            // Generate the actual item
            var item = new ListViewItem(new string[] {
                name,
                description
            }, "Plugin");
            item.Tag = config;
            return item;
        }
        #endregion

        #region AddTabToList()
        /// <summary>
        /// Adds a tab to the list.
        /// </summary>
        /// <param name="tab"></param>
        private void AddTabToList(TabConfig tab)
        {
            var item = new ListViewItem(new string[] {
                    tab.Text,
                    tab.Type.ToString()
                }, "Tabs");
            item.Tag = tab;
            tabsList.Items.Add(item);
            tabItems.Add(tab.Key, item);
        }
        #endregion

        #region MoveTab()
        /// <summary>
        /// Moves a tab.
        /// </summary>
        /// <param name="direction">The direction to move.</param>
        private void MoveTab(int direction)
        {
            var currentIndex = tabsList.SelectedItems[0].Index;
            var currentTab = tabsList.SelectedItems[0].Tag as TabConfig;
            if (((direction == 1) && (currentIndex < (tabsList.Items.Count - 1))) ||
                (direction == -1) && (currentIndex > 0))
            {
                var oldTab = tabsList.Items[currentIndex + direction];
                (oldTab.Tag as TabConfig).Order -= direction;
                currentTab.Order += direction;
                oldTab.Remove();
                tabsList.Items.Insert(currentIndex, oldTab);
            }
        }
        #endregion
        #endregion

        #region Event handlers
        #region addButton_Click()
        /// <summary>
        /// The user has clicked on the Add server button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void addButton_Click(object sender, EventArgs e)
        {
            var addForm = new AddServerForm((from serverItem in Configuration.Servers 
                                             select serverItem.Address.ToLower()).ToList());
            ServerConfig server = null;
            addForm.OkClicked += (o, a) =>
            {
                server = new ServerConfig
                {
                    Address = addForm.ServerAddress,
                    Settings = addForm.Settings,
                    TargetServer = addForm.TargetServer,
                    TransportMode = addForm.TransportMode,
                    Version = addForm.ServerVersion,
                    Server = new Server(addForm.Client)
                };
                Configuration.Servers.Add(server);
                serversList.Items.Add(new ServerConfigItem(server));
            };
            var result = addForm.ShowDialog(this);
            if (result == DialogResult.OK)
            {
                var configForm = new ServerConfigurationForm(server);
                configForm.ShowDialog(this);
            }
        }
        #endregion

        #region okButton_Click()
        /// <summary>
        /// The user has clicked the ok button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void okButton_Click(object sender, EventArgs e)
        {
            Configuration.Monitor.ShowInTaskBar = showInTaskBar.Checked;
            Configuration.Monitor.AlwaysOnTop = alwaysOnTop.Checked;
            Configuration.DefaultPluginLocation = pluginLocation.Text;
            var action = allProjectsDoubleClickAction.SelectedItem.ToString();
            Configuration.Monitor.AllProjectsDoubleClickAction = (action == allProjectDoubleClickActions[0]) ? string.Empty : action;

            // Windows only functionality
            if (EnvironmentUtils.IsRunningOnWindows)
            {
                SetAutoRun(startAutomatically.Checked);
            }

            if (OkClicked != null) OkClicked(this, EventArgs.Empty);
            DialogResult = DialogResult.OK;
            Close();
        }
        #endregion

        #region configureButton_Click()
        /// <summary>
        /// The user has clicked on the configure server button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void configureButton_Click(object sender, EventArgs e)
        {
            if (serversList.SelectedItems.Count == 1)
            {
                var item = serversList.SelectedItems[0] as ServerConfigItem;
                var configForm = new ServerConfigurationForm(item.Server);
                if (configForm.ShowDialog(this) == DialogResult.OK)
                {
                    item.Server.Server.DisplayName = item.Server.Name;
                }
            }
            else
            {
                MessageBox.Show(this, 
                    "You must select a server first", 
                    "Unable to configure server",
                    MessageBoxButtons.OK, 
                    MessageBoxIcon.Warning);
            }
        }
        #endregion

        #region removeButton_Click()
        /// <summary>
        /// The user has clicked on the remove server button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void removeButton_Click(object sender, EventArgs e)
        {
            if (serversList.SelectedItems.Count == 1)
            {
                var item = serversList.SelectedItems[0] as ServerConfigItem;
                if (MessageBox.Show(this,
                    string.Format("Are you sure you want to remove the server '{0}'?", item.Server.Server.GetDisplayName(true)),
                    "Remove server",
                    MessageBoxButtons.YesNo,
                    MessageBoxIcon.Information) == DialogResult.Yes)
                {
                    Configuration.Servers.Remove(item.Server);
                    item.Remove();
                }
            }
            else
            {
                MessageBox.Show(this,
                    "You must select a server first",
                    "Unable to remove server",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Warning);
            }
        }
        #endregion

        #region serversList_DoubleClick()
        /// <summary>
        /// The user has double-clicked on a server in the servers list view.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void serversList_DoubleClick(object sender, EventArgs e)
        {
            ShowProjectsForServer();
        }
        #endregion

        #region projectsButton_Click()
        /// <summary>
        /// The user has clicked on the projects button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void projectsButton_Click(object sender, EventArgs e)
        {
            ShowProjectsForServer();
        }
        #endregion

        #region addTemplateButton_Click()
        /// <summary>
        /// The user has clicked on the add template button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void addTemplateButton_Click(object sender, EventArgs e)
        {
            var addForm = new AddTemplateForm(Configuration);
            addForm.OkClicked += (o, a) =>
            {
                Configuration.BuildTemplates.Add(addForm.Configuration);
                templateList.Items.Add(
                    new ListViewItem(
                        new string[] {
                            addForm.Configuration.Name,
                            addForm.Configuration.FileName
                        }, "Template"));
            };
            addForm.ShowDialog(this);
        }
        #endregion

        #region removeTemplateButton_Click()
        /// <summary>
        /// The user has clicked on the remove template button.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void removeTemplateButton_Click(object sender, EventArgs e)
        {
            if (templateList.SelectedItems.Count == 1)
            {
                var item = templateList.SelectedItems[0];
                if (MessageBox.Show(this,
                    string.Format("Are you sure you want to remove the template '{0}'?", item.Text),
                    "Remove template",
                    MessageBoxButtons.YesNo,
                    MessageBoxIcon.Information) == DialogResult.Yes)
                {
                    var config = (from record in Configuration.BuildTemplates
                                 where record.Name == item.Text
                                  select record).Single(); ;
                    Configuration.BuildTemplates.Remove(config);
                    item.Remove();
                }
            }
            else
            {
                MessageBox.Show(this,
                    "You must select a template first",
                    "Unable to remove template",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Warning);
            }
        }
        #endregion

        #region addPluginButton_Click()
        /// <summary>
        /// Add a new plugin
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void addPluginButton_Click(object sender, EventArgs e)
        {
            var pluginForm = new AddPluginForm(Configuration.LoadedPlugins, Configuration.DefaultPluginLocation);
            pluginForm.OkClicked += (o, a) =>
            {
                var plugin = PluginConfig.StartNew(pluginForm.SelectedPlugin);
                var item = GeneratePluginItem(plugin);
                pluginsList.Items.Add(item);
                var actualPlugin = Plugin.StartNew(plugin);
                plugins.Add(plugin, actualPlugin);
                Configuration.LoadedPlugins.Add(plugin);

                var lastTab = Configuration.Monitor.Tabs.Max(t => t.Order);
                foreach (var tab in actualPlugin.ListTabs())
                {
                    var tabConfig = new TabConfig
                    {
                        Key = plugin.Key + ":" + tab,
                        Order = ++lastTab,
                        Text = tab,
                        Type = TabConfigType.Plugin
                    };
                    Configuration.Monitor.Tabs.Add(tabConfig);
                    AddTabToList(tabConfig);
                }
            };
            pluginForm.ShowDialog(this);
        }
        #endregion

        #region removePluginButton_Click()
        /// <summary>
        /// Remove a plugin.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void removePluginButton_Click(object sender, EventArgs e)
        {
            if (pluginsList.SelectedItems.Count == 1)
            {
                var item = pluginsList.SelectedItems[0];
                if (MessageBox.Show(this,
                    string.Format("Are you sure you want to remove the plugin '{0}'?", item.Text),
                    "Remove plugin",
                    MessageBoxButtons.YesNo,
                    MessageBoxIcon.Information) == DialogResult.Yes)
                {
                    var config = Configuration.FindPlugin((item.Tag as PluginConfig).Key);
                    Configuration.LoadedPlugins.Remove(config);
                    item.Remove();
                    var configTag = item.Tag as PluginConfig;
                    if ((configTag != null) && plugins.ContainsKey(configTag))
                    {
                        plugins.Remove(configTag);
                    }

                    // Remove any associated tabs
                    var tabs = (from record in Configuration.Monitor.Tabs
                                where record.Key.StartsWith(config.Key)
                                select record).ToArray();
                    foreach (var tab in tabs)
                    {
                        Configuration.Monitor.Tabs.Remove(tab);
                        tabItems[tab.Key].Remove();
                        tabItems.Remove(tab.Key);
                    }
                }
            }
            else
            {
                MessageBox.Show(this,
                    "You must select a plugin first",
                    "Unable to remove plugin",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Warning);
            }
        }
        #endregion

        #region configurePluginButton_Click()
        /// <summary>
        /// Configure a plugin.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void configurePluginButton_Click(object sender, EventArgs e)
        {
            if (pluginsList.SelectedItems.Count == 1)
            {
                var item = pluginsList.SelectedItems[0];
                var config = item.Tag as PluginConfig;
                if ((config != null) && plugins.ContainsKey(config))
                {
                    try
                    {
                        plugins[config].Configure();
                        config.Data = plugins[config].Configuration.Data;
                    }
                    catch (Exception error)
                    {
                        MessageBox.Show(this,
                            "An unexpected error occurred while trying to configure this plugin: " + error.Message,
                            "Unable to configure plugin",
                            MessageBoxButtons.OK,
                            MessageBoxIcon.Error);
                    }
                }
                else
                {
                    MessageBox.Show(this,
                        "Unable to configure plugin - there was an error while loading the plugin",
                        "Unable to configure plugin",
                        MessageBoxButtons.OK,
                        MessageBoxIcon.Warning);
                }
            }
            else
            {
                MessageBox.Show(this,
                    "You must select a plugin first",
                    "Unable to remove plugin",
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Warning);
            }
        }
        #endregion

        #region advancedSettings_CheckedChanged()
        /// <summary>
        /// Show or hide the advanced settings.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void advancedSettings_CheckedChanged(object sender, EventArgs e)
        {
            advancedSettingsPanel.Visible = advancedSettings.Checked;
        }
        #endregion

        #region findPluginLocation_Click()
        /// <summary>
        /// The user wants to find the plug-in location.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void findPluginLocation_Click(object sender, EventArgs e)
        {
            var dialog = new FolderBrowserDialog
            {
                Description = "Find the default plug-in location.",
                SelectedPath = pluginLocation.Text,
                ShowNewFolderButton = true
            };
            if (dialog.ShowDialog(this) == DialogResult.OK)
            {
                pluginLocation.Text = dialog.SelectedPath;
            }
        }
        #endregion

        #region moveUpButton_Click()
        /// <summary>
        /// Moves a tab up in the order.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void moveUpButton_Click(object sender, EventArgs e)
        {
            if (tabsList.SelectedItems.Count == 0)
            {
                MessageBox.Show("No tabs selected - unable to move", "Move up failed", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else 
            {
                MoveTab(-1);
            }
        }
        #endregion

        #region moveDownButton_Click()
        /// <summary>
        /// Moves a tab down in the order.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void moveDownButton_Click(object sender, EventArgs e)
        {
            if (tabsList.SelectedItems.Count == 0)
            {
                MessageBox.Show("No tabs selected - unable to move", "Move down failed", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                MoveTab(1);
            }
        }
        #endregion

        #region addTabButton_Click()
        /// <summary>
        /// Add a new tab.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void addTabButton_Click(object sender, EventArgs e)
        {
            MessageBox.Show("TODO: Add tab");
        }
        #endregion

        #region removeTabButton_Click()
        /// <summary>
        /// Remove an existing tab/
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void removeTabButton_Click(object sender, EventArgs e)
        {
            if (tabsList.SelectedItems.Count == 0)
            {
                MessageBox.Show("No tabs selected - unable to remove", "Remove failed", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else if (tabsList.Items.Count == 1)
            {
                MessageBox.Show("Cannot remove last tab - at least one tab must be visible", "Remove failed", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            else
            {
                MessageBox.Show("TODO: Remove tab");
            }
        }
        #endregion
        #endregion

        #region Private classes
        #region ServerConfigItem
        /// <summary>
        /// A <see cref="ListViewItem"/> that displays details on a server.
        /// </summary>
        private class ServerConfigItem
            : ListViewItem
        {
            #region Constructors
            /// <summary>
            /// Initialise a new <see cref="ServerConfigItem"/>.
            /// </summary>
            /// <param name="value"></param>
            public ServerConfigItem(ServerConfig value)
            {
                Server = value;
                Text = value.Server.GetDisplayName(true);
                SubItems.Add(string.Empty);
                SetTransport();

                value.Server.PropertyChanged += Server_PropertyChanged;
            }
            #endregion

            #region Public properties
            #region Server
            /// <summary>
            /// The server that is being displayed.
            /// </summary>
            public ServerConfig Server { get; set; }
            #endregion
            #endregion

            #region Private methods
            #region SetTransport()
            /// <summary>
            /// Display the transport - both the text and the image.
            /// </summary>
            private void SetTransport()
            {
                string transport = "(Default)";
                string image = "DefaultTransport";
                switch (Server.TransportMode)
                {
                    case ServerTransportMode.Http:
                        transport = "HTTP";
                        image = "HttpTransport";
                        break;
                    case ServerTransportMode.Remoting:
                        transport = ".NET Remoting";
                        image = "RemotingTransport";
                        break;
                    case ServerTransportMode.TcpCache:
                        transport = "FastForward.NET Cache (TCP)";
                        image = "FastForward";
                        break;
                }
                SubItems[1].Text = transport;
                ImageKey = image;
            }
            #endregion

            #region Server_PropertyChanged()
            private void Server_PropertyChanged(object sender, PropertyChangedEventArgs e)
            {
                Text = Server.Server.GetDisplayName(true);
            }
            #endregion
            #endregion
        }
        #endregion
        #endregion
    }
}