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

        public List<SchedulerAppointmentDC> Appointments { get; set; } = new List<SchedulerAppointmentDC>();

        public List<AppointmentListItem> AppointmentListItems
        {
            get
            {
                var result = new List<AppointmentListItem>();

                Appointments.DoForEach(app => result.AddIfNotIn(new AppointmentListItem(app)));

                return result;
            }
        }

        public bool HasRightToEditAppointment(long? appointmentOid)
        {
            if (appointmentOid == null)
            {
                return false;
            }

            var appointment = Appointments.FirstOrDefault(app => app.SchedulerAppointmentOid.HasValue && app.SchedulerAppointmentOid.Value == appointmentOid);

            if (appointment == null)
            {
                return false;
            }

            var hasCustomers = appointment.CustomerList.Any();
            var hasEmployees = appointment.EmployeeList.Any();
            var hasResources = appointment.ResourceList.Any();

            var result = true;

            if(hasEmployees)
            {
                result = hasResources ? 
                    MobileSessionFacade.CheckForUserRight(UserRightType.KalenderRessourcentermineAndererAendern) : 
                    MobileSessionFacade.CheckForUserRight(UserRightType.KalenderMitarbeitertermineAendern);

                if (appointment.CustomerList.Any())
                {
                    result = MobileSessionFacade.CheckForUserRight(UserRightType.KalenderKliententermineAendern) && result;
                }
            }
            else
            {
                if(hasCustomers && hasResources)
                {
                    result = MobileSessionFacade.CheckForUserRight(UserRightType.KalenderKliententermineAendern) && MobileSessionFacade.CheckForUserRight(UserRightType.KalenderRessourcentermineAendern);
                }
                else if(hasCustomers)
                {
                    result = MobileSessionFacade.CheckForUserRight(UserRightType.KalenderKliententermineAendern);
                }
                else if(hasResources)
                {
                    result = MobileSessionFacade.CheckForUserRight(UserRightType.KalenderRessourcentermineAendern);
                }
            }

            return result;
        }

        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; set; } = new List<ResourceDC>();

        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;
        
        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 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)
        {
            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)));
        }
    }
}