using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;



using Silverlight.Navigation.Favorites;

using Silverlight.Navigation.History;

using Silverlight.Navigation.Mapping;



namespace Silverlight.Navigation.Controls

{

    public partial class NavigationToolbar : UserControl

    {

        #region Events



        public event EventHandler<NavigationEventArgs> Go;

        public event EventHandler GoBack;

        public event EventHandler GoForward;

        public event EventHandler ClearHistory;



        #endregion



        #region Fields



        private HistoryManager _historyManager;



        #endregion



        #region Constructors



        /// <summary>

        /// Initializes a new instance of the NavigationToolbar class.

        /// </summary>

        public NavigationToolbar()

        {

            InitializeComponent();

        }



        /// <summary>

        /// Initializes a new instance of the NavigationToolbar class.

        /// </summary>

        /// <param name="historyManager">The history manager for the application.</param>

        /// <param name="favoritesManager">The favorites manager for the application.</param>

        public NavigationToolbar(HistoryManager historyManager, FavoritesManager favoritesManager)

            : this()

        {

            if (historyManager == null)

                throw new ArgumentNullException("historyManager");



            if (favoritesManager == null)

                throw new ArgumentNullException("favoritesManager");



            HistoryManager = historyManager;

            FavoritesManager = favoritesManager;

        }



        #endregion



        #region Properties



        /// <summary>

        /// Whether or not the back button is enabled.

        /// </summary>

        public bool CanGoBack

        {

            get { return this.BackButton.IsEnabled; }

            set { this.BackButton.IsEnabled = value; }

        }



        /// <summary>

        /// Whether or not the forward button is enabled.

        /// </summary>

        public bool CanGoForward

        {

            get { return this.ForwardButton.IsEnabled; }

            set { this.ForwardButton.IsEnabled = value; }

        }



        /// <summary>

        /// The history manager for the application.

        /// </summary>

        public HistoryManager HistoryManager 

        {

            get { return _historyManager; }

            set

            {

                _historyManager = value;



                this.AddressBox.SelectionChanged -= AddressBox_SelectionChanged;

                this.AddressBox.ItemsSource = _historyManager.RecentUris;

                this.AddressBox.SelectionChanged += AddressBox_SelectionChanged;

            }

        }



        /// <summary>

        /// The favorites manager for the application.

        /// </summary>

        public FavoritesManager FavoritesManager { get; set; }



        /// <summary>

        /// Whether or not the toolbar is expanded.

        /// </summary>

        public bool IsExpanded

        {

            get { return this.NavExpander.IsExpanded; }

            set { this.NavExpander.IsExpanded = value; }

        }



        /// <summary>

        /// The current uri.

        /// </summary>

        public string CurrentUri

        {

            get 

            {

                if (this.AddressBox.SelectedItem != null && this.AddressBox.SelectedItem is string)

                    return (string)this.AddressBox.SelectedItem;

                else

                    return string.Empty;

            }

            set

            {

                this.AddressBox.SelectionChanged -= AddressBox_SelectionChanged;

                this.AddressBox.SelectedItem = value;

                this.AddressBox.SelectionChanged += AddressBox_SelectionChanged;

            }

        }



        #endregion



        #region Methods



        #endregion



        #region Event Handlers



        /// <summary>

        /// Handles the selection changed event for the address box.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void AddressBox_SelectionChanged(object sender, SelectionChangedEventArgs e)

        {

            if (this.AddressBox.SelectedItem != null && Go != null)

                Go(this, new NavigationEventArgs(this.CurrentUri));

        }



        /// <summary>

        /// Handles the click event for the back button.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void BackButton_Click(object sender, RoutedEventArgs e)

        {

            if (GoBack != null)

                GoBack(this, new EventArgs());

        }



        /// <summary>

        /// Handles the click event for the forward button.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void ForwardButton_Click(object sender, RoutedEventArgs e)

        {

            if (GoForward != null)

                GoForward(this, new EventArgs());

        }



        /// <summary>

        /// Handles the click event for the history button.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void HistoryButton_Click(object sender, RoutedEventArgs e)

        {

            History history = new History();

            history.HistoryManager = this.HistoryManager;

            history.Title = "History";

            history.Closed += new EventHandler(History_Closed);

            history.ClearHistory += new EventHandler(History_ClearHistory);

            history.Show();

        }



        /// <summary>

        /// Handles the clear history event of the history dialog.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void History_ClearHistory(object sender, EventArgs e)

        {

            this.HistoryManager.Clear();



            if (ClearHistory != null)

                ClearHistory(this, new EventArgs());

        }



        /// <summary>

        /// Handles the closed event of the History dialog box.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void History_Closed(object sender, EventArgs e)

        {

            if (sender is History)

            {

                History history = (History)sender;



                if (history.DialogResult.HasValue && history.DialogResult.Value && !(string.IsNullOrEmpty(history.SelectedUri)))

                {

                    if (this.Go != null)

                        Go(this, new NavigationEventArgs(history.SelectedUri));

                }

            }

        }



        /// <summary>

        /// Handles the click event for the favorites button.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void FavoritesButton_Click(object sender, RoutedEventArgs e)

        {

            Favorites favorites = new Favorites(this.FavoritesManager);

            favorites.Closed += new EventHandler(Favorites_Closed);

            favorites.Show();

        }



        /// <summary>

        /// Handles the closed event of the favorites control.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Favorites_Closed(object sender, EventArgs e)

        {

            if (sender is Favorites)

            {

                Favorites favorites = (Favorites)sender;



                if (favorites.DialogResult.HasValue && favorites.DialogResult.Value && favorites.SelectedFavoriteItem != null)

                {

                    if (this.Go != null)

                        Go(this, new NavigationEventArgs(favorites.SelectedFavoriteItem.Uri));

                }

            }

        }



        /// <summary>

        /// Handles the click event for the add to to favorites button.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void AddToFavoritesButton_Click(object sender, RoutedEventArgs e)

        {

            AddToFavorites addToFavorites = new AddToFavorites(this.CurrentUri);

            addToFavorites.Closed += new EventHandler(AddToFavorites_Closed);

            addToFavorites.Show();

        }



        /// <summary>

        /// Handles the closed event of the add to favorites control.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void AddToFavorites_Closed(object sender, EventArgs e)

        {

            if (sender is AddToFavorites)

            {

                AddToFavorites addToFavorites = (AddToFavorites)sender;



                if (addToFavorites.DialogResult.HasValue && addToFavorites.DialogResult.Value &&

                    addToFavorites.FavoriteItem != null)

                    this.FavoritesManager.Add(addToFavorites.FavoriteItem);

            }

            

        }



        /// <summary>

        /// Handles the click event for the set as home page button.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void SetAsHomePageButton_Click(object sender, RoutedEventArgs e)

        {

            this.FavoritesManager.HomePage = new FavoriteItem { Name = "Home Page", Uri = this.CurrentUri };

        }



        /// <summary>

        /// Handles the click event for the use default home page button.

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void UseDefaultHomePage_Click(object sender, RoutedEventArgs e)

        {

            this.FavoritesManager.HomePage = null;

        }



        #endregion

    }



    /// <summary>

    /// Event args for navigation events.

    /// </summary>

    public class NavigationEventArgs : EventArgs

    {

        #region Constructors



        /// <summary>

        /// Instantiates a new instance of the NavigationEventArgs class.

        /// </summary>

        /// <param name="uri"></param>

        public NavigationEventArgs(string uri)

        {

            Uri = uri;

        }



        #endregion



        #region Properties



        /// <summary>

        /// The uri to navigate to.

        /// </summary>

        public string Uri { get; set; }



        #endregion

    }

}