using ModernKeePass.Common;
using ModernKeePassLib;
using ModernKeePassLib.Interfaces;
using ModernKeePassLib.Keys;
using ModernKeePassLib.Serialization;
using Windows.Storage;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using System.Linq;
using System;

// The Hub Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=321224

namespace ModernKeePass.Pages
{
    /// <summary>
    /// A page that displays a grouped collection of items.
    /// </summary>
    public sealed partial class DatabaseViewPage : Page
    {
        private NavigationHelper navigationHelper;
        private ObservableDictionary defaultViewModel = new ObservableDictionary();
        private PwDatabase _database = new PwDatabase();

        /// <summary>
        /// This can be changed to a strongly typed view model.
        /// </summary>
        public ObservableDictionary DefaultViewModel
        {
            get { return this.defaultViewModel; }
        }

        /// <summary>
        /// NavigationHelper is used on each page to aid in navigation and 
        /// process lifetime management
        /// </summary>
        public NavigationHelper NavigationHelper
        {
            get { return this.navigationHelper; }
        }

        public DatabaseViewPage()
        {
            this.InitializeComponent();
            this.navigationHelper = new NavigationHelper(this);
            this.navigationHelper.LoadState += navigationHelper_LoadState;

        }
        
        /// <summary>
        /// Populates the page with content passed during navigation.  Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="Common.NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session.  The state will be null the first time a page is visited.</param>
        private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
            // TODO: Assign a collection of bindable groups to this.DefaultViewModel["Groups"]
        }

        #region NavigationHelper registration

        /// The methods provided in this section are simply used to allow
        /// NavigationHelper to respond to the page's navigation methods.
        /// 
        /// Page specific logic should be placed in event handlers for the  
        /// <see cref="Common.NavigationHelper.LoadState"/>
        /// and <see cref="Common.NavigationHelper.SaveState"/>.
        /// The navigation parameter is available in the LoadState method 
        /// in addition to page state preserved during an earlier session.

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedTo(e);
            if (e.Parameter is StorageFile)
            {
                var file = e.Parameter as StorageFile;
                var key = new CompositeKey();
                key.AddUserKey(new KcpPassword("test"));
                try
                {
                    _database.Open(IOConnectionInfo.FromPath(file.Path), key, new NullStatusLogger());

                    DefaultViewModel["Groups"] = _database.RootGroup.GetGroups(false).Select(g => g.Name);
                }
                finally
                {
                    _database.Close();
                }
            }
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedFrom(e);
        }

        #endregion
    }
}