using System;
using System.Collections.Generic;
using System.Linq;

using BeWo.Scheduler.View;

using BS.Shared.Core;
using BS.Shared.DataContracts;
using BS.Shared.DataContracts.Compact;

using DevExpress.XtraScheduler;

namespace BeWo.Scheduler.ViewModel
{
	public class NewSchedulerViewModel
	{
		public event EventHandler<EventArgs<ISchedulerViewModel>> ViewModelChanged;

		private ISchedulerViewModel _ActiveAppointmentViewModel;
        private Dictionary<ValueListEntryDC, List<ResourceDC>> _AllCats2ResInDic;

        public ISchedulerViewModel ActiveAppointmentViewModel
		{
		    get => _ActiveAppointmentViewModel;

            set
			{
                if(value != null)
                {
                    _ActiveAppointmentViewModel = value;

                    ViewModelChanged?.Invoke(this, new EventArgs<ISchedulerViewModel>(value));
                }
			}
		}

        public AbstractAppointmentEditForm GetEditAppointmentForm(DevExpress.Xpf.Scheduler.SchedulerControl control, Appointment appointment)
		{
			return ActiveAppointmentViewModel?.GetEditAppointmentForm(control, appointment);
		}

		internal void InitNewAppointment(Appointment appointment)
		{
		    ActiveAppointmentViewModel?.InitNewAppointment(appointment);
		}

		public SchedulerSettings SchedulerSettings { get; set; }

		public SchedulerSettings GetActiveSettings()
		{
			return ActiveAppointmentViewModel == null ? null : SchedulerSettings ?? ActiveAppointmentViewModel.GetDefaultSchedulerSettings();
		}

		public IEnumerable<SchedulerAppointmentVM> ConvertAbsenceTimesToAppointments(IEnumerable<AbsenceTimeDC> pAbsenceTimes, DateTime pIntervalEnd, List<CompactEmployeeDC> allEmployees)
		{
		    return pAbsenceTimes.Select(abwesenheit =>
		    {
		        var subject = $"{abwesenheit.Reason.Description}";
		        var employee = allEmployees.FirstOrDefault(f => f.EmployeeOid == abwesenheit.EmployeeOid.Value);

		        if(employee != null)
		        {
		            subject += $" ({employee.SimpleDescription})";
		        }

		        return new SchedulerAppointmentVM(true, subject, abwesenheit.Start.Value, abwesenheit.End ?? pIntervalEnd, employee);
		    }).ToList();
		}
	}
}