using SmartCharging.Common;
using SmartCharging.Net;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Windows.ApplicationModel.Resources;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Graphics.Display;
using Windows.UI.Core;
using Windows.UI.Popups;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkID=390556

namespace SmartCharging
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class SettingsPage : Page
    {
        private NavigationHelper navigationHelper;
        private ObservableDictionary defaultViewModel = new ObservableDictionary();
        private SmartChargeAPI SMA;
        private ResourceLoader resourceLoader;

        public SettingsPage()
        {
            this.InitializeComponent();

            this.navigationHelper = new NavigationHelper(this);
            this.navigationHelper.LoadState += this.NavigationHelper_LoadState;
            this.navigationHelper.SaveState += this.NavigationHelper_SaveState;
            this.SMA = SmartChargeAPI.Instance;
            this.resourceLoader = ResourceLoader.GetForCurrentView("Resources");
        }

        /// <summary>
        /// Gets the <see cref="NavigationHelper"/> associated with this <see cref="Page"/>.
        /// </summary>
        public NavigationHelper NavigationHelper
        {
            get { return this.navigationHelper; }
        }

        /// <summary>
        /// Gets the view model for this <see cref="Page"/>.
        /// This can be changed to a strongly typed view model.
        /// </summary>
        public ObservableDictionary DefaultViewModel
        {
            get { return this.defaultViewModel; }
        }

        /// <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="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)
        {
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/></param>
        /// <param name="e">Event data that provides an empty dictionary to be populated with
        /// serializable state.</param>
        private void NavigationHelper_SaveState(object sender, SaveStateEventArgs e)
        {
        }

        #region NavigationHelper registration

        /// <summary>
        /// The methods provided in this section are simply used to allow
        /// NavigationHelper to respond to the page's navigation methods.
        /// <para>
        /// Page specific logic should be placed in event handlers for the  
        /// <see cref="NavigationHelper.LoadState"/>
        /// and <see cref="NavigationHelper.SaveState"/>.
        /// The navigation parameter is available in the LoadState method 
        /// in addition to page state preserved during an earlier session.
        /// </para>
        /// </summary>
        /// <param name="e">Provides data for navigation methods and event
        /// handlers that cannot cancel the navigation request.</param>
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            this.navigationHelper.OnNavigatedTo(e);
        }

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

        #endregion

        private async void LogoutButton_Tapped(object sender, TappedRoutedEventArgs e)
        {
            this.showLoading();
            bool result = await this.SMA.Logout();
            this.hideLoading();

            if (result)
            {
                CredentialStorage cs = new CredentialStorage();
                cs.RemoveCredentials();
                if (result)
                {   
                    this.goToLoginPage();
                }
            }
        }

        private async void CancelAccountButton_Tapped(object sender, TappedRoutedEventArgs e)
        {
            

            MessageDialog dialogbox1 = new MessageDialog(resourceLoader.GetString("UserAccountDeletedMessageConfirm"));

            //OK Button
            UICommand okBtn = new UICommand(resourceLoader.GetString("Yes"));
            okBtn.Invoked = async (s) =>
            {
                await this.cancelAccount();
            };
            dialogbox1.Commands.Add(okBtn);

            UICommand cancelBtn = new UICommand(resourceLoader.GetString("No"));
            dialogbox1.Commands.Add(cancelBtn);

            //Show message
            await dialogbox1.ShowAsync();

            
           
        }

        private async Task cancelAccount(){

            this.showLoading();
            bool result = await this.SMA.DeleteUserAccount();

            if (result)
            {
                CredentialStorage cs = new CredentialStorage();
                cs.RemoveCredentials();

                MessageDialog dialogbox2 = new MessageDialog(resourceLoader.GetString("UserAccountDeletedMessage"));
                //OK Button
                UICommand okBtn2 = new UICommand(resourceLoader.GetString("OK"));
                dialogbox2.Commands.Add(okBtn2);

                //Show message
                await dialogbox2.ShowAsync();
                this.goToLoginPage();
            }

            this.hideLoading();
        }

        private void goToLoginPage(){



                var aw = Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
                         () =>
                         {
                             this.Frame.Navigate(typeof(LoginPage));
                             if (this.Frame.CanGoBack)
                             {
                                 this.Frame.BackStack.Clear();
                             }
                         });
            
        }

        private void showLoading()
        {
            this.Loader.Visibility = Visibility.Visible;
        }

        private void hideLoading()
        {
            this.Loader.Visibility = Visibility.Collapsed;
        }

        
    }
}