using ShareeBike.ViewModel;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using System.Threading.Tasks;
using System;
using ShareeBike.Model.Device;
using ShareeBike.ViewModel.Account;
using ShareeBike.Model.Bikes.BikeInfoNS.DriveNS.BatteryNS;

namespace ShareeBike.View.Login
{
	[XamlCompilation(XamlCompilationOptions.Compile)]
	public partial class LoginPage : ContentPage, IViewService
	{
		/// <summary> Reference to view model. </summary>
		LoginPageViewModel m_oViewModel = null;

		/// <summary> Constructs a login page. </summary>
		public LoginPage()
		{
			InitializeComponent();

			var l_oModel = App.ModelRoot;
			m_oViewModel = new LoginPageViewModel(
				l_oModel,
				(url) => DependencyService.Get<IExternalBrowserService>().OpenUrl(url),
				this);

			BindingContext = m_oViewModel;
		}

		/// <summary>
		/// Displays alert message.
		/// </summary>
		/// <param name="p_strTitle">Title of message.</param>
		/// <param name="p_strMessage">Message to display.</param>
		/// <param name="p_strCancel">Type of buttons.</param>
		public new async Task DisplayAlert(string p_strTitle, string p_strMessage, string p_strCancel)
			=> await App.Current.MainPage.DisplayAlert(p_strTitle, p_strMessage, p_strCancel);

		/// <summary> Displays alert message.</summary>
		/// <param name="title">Title of message.</param>
		/// <param name="message">Message to display.</param>
		/// <param name="details">Detailed error description.</param>
		/// <param name="cancel">Type of buttons.</param>
		public async Task DisplayAdvancedAlert(
			string title,
			string message,
			string details,
			string cancel)
			=> await App.Current.MainPage.DisplayAlert(title, $"{message}\r\nDetails:\r\n{details}", cancel);

		/// <summary> Displays detailed alert message.</summary>
		/// <param name="title">Title of message.</param>
		/// <param name="message">Message to display.</param>
		/// <param name="details">Detailed error description.</param>
		/// <param name="accept">Text of accept button.</param>
		/// <param name="cancel">Text of cancel button.</param>
		/// <returns>True if user pressed accept.</returns>
		public async Task<bool> DisplayAdvancedAlert(string title, string message, string details, string accept, string cancel)
			=> await App.Current.MainPage.DisplayAlert(title, !string.IsNullOrEmpty(details) ? $"{message}\r\nDetails:\r\n{details}" : $"{message}", accept, cancel);

		/// <summary> Shows a page.</summary>
		/// <param name="route">Route of the page to show.</param>
		public async Task ShowPage(string route) => await Shell.Current.GoToAsync(route);


		/// <summary> Pushes a page onto the modal stack. </summary>
		/// <param name="p_oTypeOfPage">Page to display.</param>
		public async Task PushModalAsync(ViewTypes typeOfPage)
			=> await Navigation.PushModalAsync((Page)Activator.CreateInstance(typeOfPage.GetViewType()));


		/// <summary> Pops a page from the modal stack. </summary>
		public Task PopModalAsync()
		{
			throw new NotSupportedException();
		}

		/// <summary>
		/// Invoked when pages is closed/ hidden. 
		/// Stops update process.
		/// </summary>
		protected async override void OnDisappearing()
		{
			if (m_oViewModel == null)
			{
				// View model might be null.
				return;
			}
			await m_oViewModel.OnDisappearing();
		}

		/// <summary> Pushes a page onto the stack. </summary>
		/// <param name="p_oTypeOfPage">Page to display.</param>
		public async Task PushAsync(ViewTypes p_oTypeOfPage)
		{
			await Navigation.PushAsync((Page)Activator.CreateInstance(p_oTypeOfPage.GetViewType()));
		}

#if USCSHARP9
        public Task<IViewService.IUserFeedback> DisplayUserFeedbackPopup() => throw new NotSupportedException();
#else
		public async Task<IUserFeedback> DisplayUserFeedbackPopup(IBatteryMutable battery = null) => throw new NotSupportedException();
#endif
	}
}