using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;
using System.Windows.Media;
using BS.Shared.DataContracts;
using BS.Shared.DataContracts.Compact;
using BS.Shared.Extensions;

namespace BeWo.Scheduler.ViewModel
{
    public class CustomFieldStorage
    {
        public string ToolTip
        {
            get
            {
                var result = Subject;

                // Man darf den Betreff nicht sehen, wenn man der Originator ist und nicht in der nicht leeren EmployeeList ist oder man weder Originator noch in der EmployeeList ist

                var isInEmployeeList = EmployeeList.Any(e2A => e2A.Employee.Equals(BeWoApp.CompactLoggedOnEmployee));
                var isOriginator = Originator.Equals(BeWoApp.CompactLoggedOnEmployee);

                if(IsPrivate && (!isOriginator && !isInEmployeeList || !isInEmployeeList))
                {
                    result = "Privat";
                }

                if(IsTask)
                {
                    result = result ?? string.Empty;
                    
                    if(CompletedDate.HasValue)
                    {
                        result += " erledigt am " + CompletedDate.Value.ToShortDateString();
                    }
                    else if(DueDate.HasValue)
                    {
                        result += $" bis {DueDate.Value:dd.MM.yyyy HH:mm}";
                    }
                }

                if(!IsAbsenceTime || !_AbsenceTimeStart.HasValue)
                {
                    return result;
                }

                var absenceTimeEnd = _AbsenceTimeEnd;

                if(!absenceTimeEnd.HasValue)
                {
                    return $"{result}{_AbsenceTimeStart.Value.GetIntervalDescription(absenceTimeEnd)}";
                }

                var absenceTimeStart = _AbsenceTimeStart.Value;

                if(absenceTimeStart.IsTimeZero() && absenceTimeEnd.Value.IsTimeZero() && absenceTimeEnd.Value.AddDays(-1) > absenceTimeStart)
                {
                    absenceTimeEnd = absenceTimeEnd.Value.AddDays(-1);
                }

                return $"{result}{_AbsenceTimeStart.Value.GetIntervalDescription(absenceTimeEnd)}";
            }
        }

        public string Subject { get; set; }
        
        public bool IsTask { get; set; }
        public bool IsAbsenceTime { get; set; }
        public bool IsPrivate { get; set; }
        public bool IsAllDay { get; set; }
        
        public LinearGradientBrush BackgroundColor => new LinearGradientBrush(new GradientStopCollection { new GradientStop(IsTask ? Color.FromRgb(153, 59, 59) : Color.FromRgb(192, 255, 208), 1) }, new Point(.5, 0), new Point(.5, 1));
        public LinearGradientBrush ForegroundColor => new LinearGradientBrush(new GradientStopCollection { new GradientStop(IsTask ? Color.FromRgb(224, 224, 224) : Color.FromRgb(0, 0, 0), 1) }, new Point(.5, 0), new Point(.5, 1));

        public ObservableCollection<Employee2SchedulerAppointmentDC> EmployeeList { get; set; } = new ObservableCollection<Employee2SchedulerAppointmentDC>();
        public List<CompactCustomerDC> CustomerList { get; set; }                               = new List<CompactCustomerDC>();
        public List<ResourceDC> ResourceList { get; set; }                                      = new List<ResourceDC>();
        public List<CompactSupportConceptDC> SupportConceptList { get; set; }                   = new List<CompactSupportConceptDC>();
        
        public DateTime? DueDate { get; set; }
        public DateTime? CompletedDate { get; set; }
        public string CompletedNotice { get; set; }
        public string CompletedUser { get; set; }
        public string TaskDescription { get; set; }

        public long? SchedulerAppointmentOid { get; set; }

        public string RecurrenceId { get; set; }
        public int RecurrenceIndex { get; set; }

        public CompactEmployeeDC Originator { get; set; }

        private DateTime? _AbsenceTimeStart;

        private DateTime? _AbsenceTimeEnd;

        public InternalInfo InternalInfo { get; set; }

        public bool CanBeEdited { get; set; }

        public long? AbsenceTimeOid { get; set; }

        public bool IsCustomerAbsenceTime { get; set; }

        public CustomFieldStorage()
        {
            
        }
        
        public CustomFieldStorage(SchedulerAppointmentVM pAppointment)
        {
            IsTask        = pAppointment.IsTask;
            IsAbsenceTime = pAppointment.IsAbsenceTime;
            IsPrivate     = pAppointment.IsPrivate;
            IsAllDay      = pAppointment.AllDay;

            EmployeeList       = pAppointment.EmployeeList;
            CustomerList       = pAppointment.CustomerList;
            ResourceList       = pAppointment.ResourceList;
            SupportConceptList = pAppointment.SupportConceptList;

            DueDate         = pAppointment.DueDate;
            CompletedDate   = pAppointment.CompletedDate;
            CompletedNotice = pAppointment.CompletedNotice;
            TaskDescription = pAppointment.TaskDescription;

            Originator = pAppointment.Originator;
            Subject = pAppointment.Subject;

            SchedulerAppointmentOid = pAppointment.DataContract?.SchedulerAppointmentOid;

            RecurrenceId = pAppointment.DataContract?.RecurrenceIdReference;
            RecurrenceIndex = pAppointment.DataContract?.RecurrenceIndexReference ?? 0;

            _AbsenceTimeStart = pAppointment.AbsenceTimeStart;
            _AbsenceTimeEnd = pAppointment.AbsenceTimeEnd;

            HasServiceRecordEntry = pAppointment.HasServiceRecordEntry;
            CanBeEdited = pAppointment.CanBeEdited;

            AbsenceTimeOid = pAppointment.AbsenceTimeOid;
            IsCustomerAbsenceTime = pAppointment.IsCustomerAbsenceTime;
            ServiceRecordList = pAppointment.ServiceRecordList;
        }

        /// <summary>
        /// Erzeugt ein CustomFieldStorage-Objekt aus einem SchedulerAppointmentDC. Wird nur für veränderte Serientermine benutzt.
        /// </summary>
        /// <param name="pAppointment">Der veränderte Serientermin als SchedulerAppointmentDC</param>
        public CustomFieldStorage(SchedulerAppointmentDC pAppointment)
        {
            IsTask        = pAppointment.IsTask;
            IsAbsenceTime = false;
            IsPrivate     = pAppointment.IsPrivate;
            IsAllDay      = pAppointment.AllDay;

            EmployeeList       = new ObservableCollection<Employee2SchedulerAppointmentDC>(pAppointment.EmployeeList);
            CustomerList       = pAppointment.CustomerList;
            ResourceList       = pAppointment.ResourceList;
            SupportConceptList = pAppointment.SupportConceptList;
            ServiceRecordList  = pAppointment.ServiceRecordList;

            DueDate         = pAppointment.DueDate;
            CompletedDate   = pAppointment.CompletedDate;
            CompletedNotice = pAppointment.CompletedNotice;
            TaskDescription = pAppointment.TaskDescription;

            Originator = pAppointment.Originator;
            Subject    = pAppointment.Subject;

            SchedulerAppointmentOid = pAppointment.SchedulerAppointmentOid;

            RecurrenceId = pAppointment.RecurrenceIdReference;
            RecurrenceIndex = pAppointment.RecurrenceIndexReference ?? 0;

            HasServiceRecordEntry = pAppointment.HasServiceRecordEntry;

            CanBeEdited = pAppointment.CanBeEdited;
        }

        public CustomFieldStorage(ObservableCollection<Employee2SchedulerAppointmentDC> pEmployees, List<CompactCustomerDC> pCustomers, List<ResourceDC> pResources, CompactEmployeeDC pOriginator, bool pIsPrivate, bool pIsTask, string pTaskDescription, DateTime? pDueDate, DateTime? pCompletedDate, string pCompletedNotice, List<CompactSupportConceptDC> pSupportConcepts, string pSubject, bool pIsAllDay, List<ServiceRecordDC> serviceRecords)
        {
            IsTask    = pIsTask;
            IsPrivate = pIsPrivate;
            IsAllDay  = pIsAllDay;
            
            EmployeeList       = pEmployees;
            CustomerList       = pCustomers;
            ResourceList       = pResources;
            
            SupportConceptList = pSupportConcepts;
            ServiceRecordList  = serviceRecords;

            DueDate         = pDueDate;
            CompletedDate   = pCompletedDate;
            CompletedNotice = pCompletedNotice;
            TaskDescription = pTaskDescription;

            Originator = pOriginator;
            Subject    = pSubject;
        }

        public Visibility ToolTipTimeVisibility => IsTask || IsAbsenceTime ? Visibility.Collapsed : Visibility.Visible;

        public Visibility ToolTipResourcesVisibility => ResourceList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;

        public Visibility ToolTipEmployeesVisibility => EmployeeList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;

        public Visibility ToolTipCustomersVisibility => CustomerList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;

        public Visibility ToolTipTrennstrichVisibility => EmployeeList?.Count > 0 || CustomerList?.Count > 0 || ResourceList?.Count > 0 ? Visibility.Visible : Visibility.Collapsed;

        public Visibility ToolTipZusageVisibility => IsTask ? Visibility.Collapsed : Visibility.Visible;

        public bool HasServiceRecordEntry { get; set; }

        public List<ServiceRecordDC> ServiceRecordList { get; set; } = new List<ServiceRecordDC>();
    }

    public class InternalInfo
    {
        public bool IsTimeChangedRecurringAppointment { get; set; }
    }
}