using System;
using System.Linq;
using InABox.Mobile;
using Xamarin.Forms;

namespace PRS.Mobile
{
    public class LeaveSelectionPage : SelectionPage
    {
        public LeaveSelectionPage(Action<ActivityShell> action)
            : base(
                "Select Leave Type",
                SelectionPageMode.Immediate,
                (columns, filters) =>
                {
                    columns
                        .BeginUpdate()
                        .Clear()
                        .Add(new MobileGridTextColumn<ActivityShell>()
                            { Column = x => x.Code, Width = 100, Alignment = TextAlignment.Center })
                        .Add(new MobileGridTextColumn<ActivityShell>()
                            { Column = x => x.Description, Width = GridLength.Star, Alignment = TextAlignment.Start })
                        .EndUpdate();
                    filters.AddRange(App.Data.Activities.AvailableFilters().Select(x=>x.Name));
                },

                (args) =>
                {
                    App.Data.Activities.SelectFilter(args.Filter);
                    var result = App.Data.Activities.Refresh(args.Force);
                    result.Search((o) =>
                    {
                        return o is ActivityShell shell && shell.IsLeave; 
                    });
                    args.LastUpdated = App.Data.Activities.LastUpdated;
                    return result;
                },
                (items) => action?.Invoke(items.FirstOrDefault() as ActivityShell)
            )
        {
        }
    }
}