using System;
using System.Linq;
using System.Windows.Input;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using XF.Material.Forms.UI.Dialogs;

namespace comal.timesheets
{

    public class MobileListRefreshEventArgs : EventArgs
    {
    }
    
    public delegate void MobileListRefreshEvent(object sender, MobileListRefreshEventArgs args);
    
    
    public class MobileListItemTappedEventArgs : EventArgs
    {
    }
    
    public delegate void MobileListItemTappedEvent(object sender, MobileListItemTappedEventArgs args);
    
    public class MobileListViewModel : BindableObject
    {

        public int RowHeight { get; set; }

        public DataTemplate ItemTemplate { get; set; }
        
        public object ItemsSource { get; set; }

        public bool PullToRefresh
        {
            get;
            set;
        }
        
        public event MobileListRefreshEvent Refresh;
        
        public ICommand RefreshCommand => new Command(DoRefresh, CanRefresh);

        private bool CanRefresh(object sender) => PullToRefresh;

        private void DoRefresh(object sender)
        { 
            IsRefreshing = true;
            Refresh?.Invoke(sender, new MobileListRefreshEventArgs());
            IsRefreshing = false;
        }

        public bool IsRefreshing { get; private set; }
        
        
    }
    
    // public class MobileListDataTemplateSelector : DataTemplateSelector
    // {
    //     
    //     protected override DataTemplate OnSelectTemplate(object item, BindableObject container) => new DataTemplate(typeof(DeliveryListEntry));
    // }

    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class MobileList
    {

        public bool PullToRefresh
        {
            get => _viewmodel.PullToRefresh;
            set => _viewmodel.PullToRefresh = value;
        }

        public int RowHeight
        {
            get => _viewmodel.RowHeight;
            set => _viewmodel.RowHeight = value;
        }
        
        public DataTemplate ItemTemplate
        {
            get => _viewmodel.ItemTemplate;
            set => _viewmodel.ItemTemplate = value;
        }


        public object ItemsSource
        {
            get => _viewmodel.ItemsSource;
            set => _viewmodel.ItemsSource = value;
        }
        
        public event MobileListRefreshEvent Refresh;

        public event MobileListItemTappedEvent ItemTapped;
        
        public MobileList()
        {
            InitializeComponent();
            
            _viewmodel.Refresh += DoRefresh;
        }

        private async void DoRefresh(object sender, MobileListRefreshEventArgs args)
        {
            Refresh?.Invoke(this, new MobileListRefreshEventArgs());
        }

        private void Cell_OnTapped(object sender, EventArgs e)
        {
            //if (sender is ViewCell viewcell)
            //    ItemTapped?.Invoke(viewcell.BindingContext, new MobileListItemTappedEventArgs());
        }


        private void _list_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (e.CurrentSelection.Any())
                ItemTapped?.Invoke(e.CurrentSelection.First(), new MobileListItemTappedEventArgs());
        }
    }
}