using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Syncfusion.XForms.PopupLayout;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using XF.Material.Forms.UI.Dialogs;

namespace comal.timesheets
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class BasePage 
    {
        public IList<View> ActionButtons => _actionButtons.Children;
        public IList<View> PageContent => _content.Children;

        public bool BackButtonEnabled
        {
            get => _backButton.IsVisible;
            set => _backButton.IsVisible = value;
        }
        
        private SfPopupLayout _popup = new SfPopupLayout();
        
        public BasePage()
        {
            InitializeComponent();
            _titleBar.BackgroundColor = XF.Material.Forms.Material.Color.Primary;
            _titleLabel.TextColor = XF.Material.Forms.Material.Color.OnPrimary;
        }
        
        protected override void OnAppearing()
        {
            App.Data.TransportConnected += TransportConnected;
            App.Data.TransportDisconnected += TransportDisconnected; 
            UpdateTransportStatus();
            base.OnAppearing();
        }

        protected override void OnDisappearing()
        {
            App.Data.TransportConnected -= TransportConnected;
            App.Data.TransportDisconnected -= TransportDisconnected;
            base.OnDisappearing();
        }

        private void TransportDisconnected(TransportDisconnectedEventArgs args) => UpdateConnectionStatus();

        private void TransportConnected(TransportConnectedEventArgs args) => UpdateConnectionStatus();
        
        private void UpdateConnectionStatus()
        {
            Device.BeginInvokeOnMainThread(UpdateTransportStatus);
        }
        
        private static Task<IMaterialModalPage> _snackbar = null;
        
        protected virtual void UpdateTransportStatus()
        {
            // ConnectionIndicator.Image = App.Data.IsConnected()
            //     ? ImageSource.FromFile("transparent.png")
            //     : ImageSource.FromFile("disconnected.png"); //ImageSource.FromFile("Images/nodata.png");
            _connectionIndicator.IsVisible = !App.Data.IsConnected();
            
            // if (!App.Data.IsConnected() && (_snackbar == null))
            //     _snackbar = MaterialDialog.Instance.LoadingSnackbarAsync(message: "No Connection Available!");
            //
            // else if (App.Data.IsConnected() && (_snackbar != null) && (_snackbar.Result != null))
            // {
            //     _snackbar.Result.DismissAsync();
            //     _snackbar = null;
            // }
        }

        private void _backButton_OnClicked(object sender, EventArgs e)
        {
            Navigation.PopAsync();
        }
        
        public void ShowPopup(Func<View> view, int height = 500, int width = 300, int padding = 10)
        {
            _popup.PopupView.HeightRequest = height;
            _popup.PopupView.WidthRequest = width;
            _popup.PopupView.ShowHeader = false;
            _popup.PopupView.ShowFooter = false;
            _popup.PopupView.ContentTemplate = new DataTemplate(() =>
            {
                Grid grid = new Grid() { Margin = padding, Padding = padding};
                grid.Children.Add(view());
                return grid;
            });
            _popup.Show();
        }

        public void DismissPopup()
        {
            _popup.Dismiss();
        }
    }
}