using System;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;
using InABox.Core;
using Xamarin.Forms.Xaml;
using XF.Material.Forms.UI.Dialogs;

namespace comal.timesheets
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class ExistingForms
    {
        
        private String _currentfilter = "";

        public IModel DataModel
        {
            get => _model.DataModel;
            set => _model.DataModel = value;
        }

        public String AppliesTo
        {
            get => _model.AppliesTo;
            set => _model.AppliesTo = value;
        }

        public Func<IModel, IDigitalFormInstanceShell[]> Property
        {
            get => _model.Property;
            set => _model.Property = value;
        }
        
        // Event to handle new / existing form selection
        
        public ExistingForms()
        {
            InitializeComponent();
        }
        
        public void RefreshData(bool force, bool async)
        {
            if (async)
                DataModel.Refresh(force, Refresh);
            else
            {
                DataModel.Refresh(true);
                Refresh();
            }
        }
        
        private void Refresh()
        {
            var forms = Property(DataModel);
            _forms.ItemsSource = forms.Where(FilterShell);
        }
        
        private bool FilterShell(IDigitalFormInstanceShell shell)
        {
            if (String.IsNullOrWhiteSpace(_currentfilter))
                return true;
            return shell.Code.ToUpper().Contains(_currentfilter.ToUpper())
                   || shell.Description.ToUpper().Contains(_currentfilter.ToUpper());
        }

        private void _search_OnTextChanged(object sender, MobileSearchBarTextChangedArgs args)
        {
            _currentfilter = args.Text;
            Refresh();
        }

        private void _digitalforms_OnRefresh(object sender, MobileListRefreshEventArgs args)
        {
            RefreshData(true,false);
        }
        
        private void AddForm_Tapped(object sender, EventArgs e)
        {
            var selector = new NewForms() { AppliesTo = this.AppliesTo };
            selector.ItemSelected += CreateNewForm;
            Navigation.PushAsync(selector);
        }

        private async void CreateNewForm(object sender, NewFormSelectedArgs args)
        {
            await MaterialDialog.Instance.AlertAsync("Not Implemented Yet!");
            return;
        }
        
        private async void EditForm(object sender, MobileListItemTappedEventArgs args)
        {
            await MaterialDialog.Instance.AlertAsync("Not Implemented Yet!");
            return;
        }
    }
}