using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web.Mvc;
using BeWoPlanerMobil.Service;
using BeWoPlanerMobil.Util;
using BS.Shared;
using BS.Shared.Core;
using BS.Shared.DataContracts;
using BS.Shared.DataContracts.Compact;
using BS.Shared.Extensions;

namespace BeWoPlanerMobil.Models
{
    public class SchedulerModel : AbstractModel
    {
        public List<long> TeamMemberCustomerOids { get; set; }

        public DateTime SelectedDate { get; set; } = DateTime.Today;
        
        public SchedulerAppointmentDC SelectedAppointment { get; set; }

        private List<SchedulerAppointmentDC> _Appointments;

        public List<SchedulerAppointmentDC> Appointments
        {
            get => _Appointments ?? (_Appointments = new List<SchedulerAppointmentDC>());

            set
            {
                var oldAppointments = AppointmentListItems.Select(li => li.SchedulerAppointment).ToList();

                _Appointments = value ?? new List<SchedulerAppointmentDC>();

                if(_Appointments.AreListEqual(oldAppointments))
                {
                    return;
                }

                _AppointmentListItems = new List<AppointmentListItem>();

                foreach(var appointment in _Appointments)
                {
                    var listItem = new AppointmentListItem(appointment);
                    listItem.GenerateIdentifier(_AppointmentListItems.Select(a => a.Identifier).ToList());

                    _AppointmentListItems.Add(listItem);
                }
            }
        }
        
        private List<AppointmentListItem> _AppointmentListItems;
        public List<AppointmentListItem> AppointmentListItems => _AppointmentListItems ?? (_AppointmentListItems = new List<AppointmentListItem>());

        public bool HasRightToEditAppointment(Guid identifier)
        {
            var appointment = AppointmentListItems.FirstOrDefault(app => app.Identifier.Equals(identifier))?.SchedulerAppointment; //Appointments.FirstOrDefault(app => app.SchedulerAppointmentOid.HasValue && app.SchedulerAppointmentOid.Value == appointmentOid);

            return appointment != null && Utils.CheckSchedulerRights(appointment.CustomerList, appointment.ResourceList, appointment.EmployeeList, appointment.Originator, appointment.SchedulerAppointmentOid is null, SchedulerRightsCheckType.Edit, MobileSessionFacade.LoggedInUserDC, TeamMemberCustomerOids ?? new List<long>());
        }

        public string DescriptionToEdit => SelectedAppointment?.Description ?? string.Empty;

        public string SubjectToEdit => SelectedAppointment?.Subject ?? string.Empty;

        public string StartDateToEdit => SelectedAppointment?.StartDate?.ToShortDateString() ?? SelectedDate.ToShortDateString();

        public string EndDateToEdit => SelectedAppointment?.EndDate?.ToShortDateString() ?? SelectedDate.ToShortDateString();

        public string StartTimeToEdit => SelectedAppointment?.StartDate?.ToShortTimeString() ?? string.Empty;

        public string EndTimeToEdit => SelectedAppointment?.EndDate?.ToShortTimeString() ?? string.Empty;

        public string LocationToEdit => SelectedAppointment?.Location ?? string.Empty;

        public List<ResourceDC> AllResources
        {
            get
            {
                var allResources = new List<ResourceDC>();

                foreach(var cat2res in ResourceCategories2Resources)
                {
                    allResources.AddRangeIfElementsNotIn(cat2res.Value);
                }

                return allResources;
            }
        }

        public List<ResourceDC> SelectedResources { get; set; } = new List<ResourceDC>();

        public Dictionary<ValueListEntryDC, List<ResourceDC>> ResourceCategories2Resources { get; set; } = new Dictionary<ValueListEntryDC, List<ResourceDC>>();


        [Display(Name = "Kalenderansicht")] 
        public string SelectedSchedulerView { get; set; } = "1";

        public List<SelectListItem> SchedulerViewList
        {
            get
            {
                var result = new List<SelectListItem>
                {
                    new SelectListItem { Text = "1", Value = "1" },
                    new SelectListItem { Text = "5", Value = "5" },
                    new SelectListItem { Text = "7", Value = "7" }
                };

                return result;
            }
        }

        public WeekViewObject WeekViewObject { get; set; }

        public List<CompactEmployeeDC> AllEmployees { get; set; } = new List<CompactEmployeeDC>();

        public List<CompactEmployeeDC> SelectedEmployees { get; set; } = new List<CompactEmployeeDC>();

        public List<CompactCustomerDC> AllCustomers { get; set; } = new List<CompactCustomerDC>();

        public List<CompactCustomerDC> SelectedCustomers { get; set; } = new List<CompactCustomerDC>();

        public bool IsInEditMode => SelectedAppointment != null;
        
        // ToDo: Überarbeiten? Es kam das Ansehen hinzu
        public bool HasResourcesEmployeesOrCustomers 
        { 
            get
            {
                var isOwnAppointment = !IsInEditMode || SelectedAppointment.Originator.EmployeeOid == Employee.EmployeeOid;

                var v1 = HasRightToInsertEmployeeAppointments || IsInEditMode && HasRightToEditEmployeeAppointments;

                var v2 = HasRightToInsertRessourceAppointments || IsInEditMode && HasRightToEditResourceAppointments;

                if (IsInEditMode && !isOwnAppointment)
                {
                    v2 = HasRightToEditOthersResourceAppointments;
                }

                var v3 = HasRightToInsertCustomerAppointments || IsInEditMode && HasRightToEditCustomerAppointments;

                return v1 || v2 || v3;
            }
        }

        public bool ShowEmployeeButton => IsInEditMode ? HasRightToInsertEmployeeAppointments : HasRightToEditEmployeeAppointments;
        public bool ShowCustomerButton => IsInEditMode ? HasRightToInsertCustomerAppointments : HasRightToEditCustomerAppointments;

        //IntervalFinder
        public List<CompactEmployeeDC> SelectedEmployeesForIntervalFinder { get; set; } = new List<CompactEmployeeDC>();
        public List<CompactCustomerDC> SelectedCustomersForIntervalFinder { get; set; } = new List<CompactCustomerDC>();
        public List<ResourceDC> SelectedResourcesForIntervalFinder        { get; set; } = new List<ResourceDC>();

        public Dictionary<DateTime, List<DateTimeSpan>> FreeIntervals { get; set; } = new Dictionary<DateTime, List<DateTimeSpan>>();

        public bool IsInIntervalFinderMode { get; set; }
        public DateTime? IntervalStartDate { get; set; }
        public DateTime? IntervalEndDate   { get; set; }

        public string IntervalStartDateStr => IntervalStartDate.HasValue ? $"{IntervalStartDate:dd.MM.yyyy}" : string.Empty;
        public string IntervalEndDateStr => IntervalEndDate.HasValue ? $"{IntervalEndDate:dd.MM.yyyy}" : string.Empty;
        public string IntervalStartTimeStr => IntervalStartDate.HasValue ? $"{IntervalStartDate:HH:mm}" : string.Empty;
        public string IntervalEndTimeStr => IntervalEndDate.HasValue ? $"{IntervalEndDate:HH:mm}" : string.Empty;

        public int? IntervalDuration { get; set; }

        public string IntervalDurationStr => IntervalDuration.HasValue ? $"{IntervalDuration}" : string.Empty;

        [Display(Name = "Ganztägig")]
        public bool IsAllDay { get; set; }

        [Display(Name = "Privat")]
        public bool IsPrivate { get; set; }

        public List<CompactEmployeeDC> MyTeamEmployees { get; set; }

        public List<ResourceDC> SelectedResourcesForFiltering { get; set; } = new List<ResourceDC>();
        public List<CompactEmployeeDC> SelectedEmployeesForFiltering { get; set; } = new List<CompactEmployeeDC>();
        public List<CompactCustomerDC> SelectedCustomersForFiltering { get; set; } = new List<CompactCustomerDC>();

        public List<CompactTeamDC> MyTeams { get; set; } = new List<CompactTeamDC>();

        public bool ShouldLoadTasks { get; set; }
    }

    public class WeekViewObject
    {
        public KeyValuePair<DateTime, List<AppointmentListItem>> MondayAppointments { get; set; }

        public KeyValuePair<DateTime, List<AppointmentListItem>> TuesdayAppointments { get; set; }
        public KeyValuePair<DateTime, List<AppointmentListItem>> WednesdayAppointments { get; set; }
        public KeyValuePair<DateTime, List<AppointmentListItem>> ThursdayAppointments { get; set; }
        public KeyValuePair<DateTime, List<AppointmentListItem>> FridayAppointments { get; set; }
        public KeyValuePair<DateTime, List<AppointmentListItem>> SaturdayAppointments { get; set; }
        public KeyValuePair<DateTime, List<AppointmentListItem>> SundayAppointments { get; set; }

        public WeekViewObject(IEnumerable<SchedulerAppointmentDC> appointments, DateTime monday, EmployeeDC loggedInEmployee)
        {
            var first = monday.Date;
            var last = first.AddDays(6);

            var tuesday = first.AddDays(1);
            var wednesday = first.AddDays(2);
            var thursday = first.AddDays(3);
            var friday = first.AddDays(4);
            var saturday = first.AddDays(5);
            
            var blubbtest = appointments.Where(a => a.StartDate >= first || a.StartDate <= last).ToList();

            var mondays = blubbtest.Where(a => a.StartDate.HasValue && a.StartDate.Value.DayOfWeek == DayOfWeek.Monday);
            var tuesdays = blubbtest.Where(a => a.StartDate.HasValue && a.StartDate.Value.DayOfWeek == DayOfWeek.Tuesday);
            var wednesdays = blubbtest.Where(a => a.StartDate.HasValue && a.StartDate.Value.DayOfWeek == DayOfWeek.Wednesday);
            var thursdays = blubbtest.Where(a => a.StartDate.HasValue && a.StartDate.Value.DayOfWeek == DayOfWeek.Thursday);
            var fridays = blubbtest.Where(a => a.StartDate.HasValue && a.StartDate.Value.DayOfWeek == DayOfWeek.Friday);
            var saturdays = blubbtest.Where(a => a.StartDate.HasValue && a.StartDate.Value.DayOfWeek == DayOfWeek.Saturday);
            var sundays = blubbtest.Where(a => a.StartDate.HasValue && a.StartDate.Value.DayOfWeek == DayOfWeek.Sunday);

            MondayAppointments = new KeyValuePair<DateTime, List<AppointmentListItem>>(first, new List<AppointmentListItem>());
            TuesdayAppointments = new KeyValuePair<DateTime, List<AppointmentListItem>>(tuesday, new List<AppointmentListItem>());
            WednesdayAppointments = new KeyValuePair<DateTime, List<AppointmentListItem>>(wednesday, new List<AppointmentListItem>());
            ThursdayAppointments = new KeyValuePair<DateTime, List<AppointmentListItem>>(thursday, new List<AppointmentListItem>());
            FridayAppointments = new KeyValuePair<DateTime, List<AppointmentListItem>>(friday, new List<AppointmentListItem>());
            SaturdayAppointments = new KeyValuePair<DateTime, List<AppointmentListItem>>(saturday, new List<AppointmentListItem>());
            SundayAppointments = new KeyValuePair<DateTime, List<AppointmentListItem>>(last, new List<AppointmentListItem>());

            mondays.DoForEach(app => MondayAppointments.Value.Add(new AppointmentListItem(app)));
            tuesdays.DoForEach(app => TuesdayAppointments.Value.Add(new AppointmentListItem(app)));
            wednesdays.DoForEach(app => WednesdayAppointments.Value.Add(new AppointmentListItem(app)));
            thursdays.DoForEach(app => ThursdayAppointments.Value.Add(new AppointmentListItem(app)));
            fridays.DoForEach(app => FridayAppointments.Value.Add(new AppointmentListItem(app)));
            saturdays.DoForEach(app => SaturdayAppointments.Value.Add(new AppointmentListItem(app)));
            sundays.DoForEach(app => SundayAppointments.Value.Add(new AppointmentListItem(app)));
        }
    }
}