using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Windows;
using BeWo.Annotations;
using BeWo.Core;
using BeWo.Core.Service;
using BeWo.ServiceProxy;
using BS.Shared;
using BS.Shared.Core;
using BS.Shared.DataContracts;
using BS.Shared.DataContracts.Compact;
using ChatController.Utilities.Extensions;
using DevExpress.Xpf.Core;
using DevExpress.XtraReports.UI;

namespace BeWo.View.Report.Kilometerauswertung
{
    public partial class KilometerauslastungsView : INotifyPropertyChanged
    {
        public bool IsCreateButtonEnabled => _ShouldDoListReport || _SelectedCustomer != null;

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

        private bool _ShouldDoListReport;

        private CompactCustomerDC _SelectedCustomer;
        public CompactCustomerDC SelectedCustomer
        {
            get => _SelectedCustomer;

            set
            {
                if(!Equals(_SelectedCustomer, value))
                {
                    _SelectedCustomer = value;

                    if(value != null)
                    {
                        OnPropertyChanged(nameof(IsCreateButtonEnabled));
                    }

                    OnPropertyChanged(nameof(SelectedCustomer));
                }
            }
        }

        public List<string> MonthNames => DateTimeFormatInfo.CurrentInfo?.MonthNames.Where(s => !string.IsNullOrEmpty(s)).ToList();

        private int _SelectedMonthIndex;

        private List<int> _Years;

        public List<int> Years
        {
            get => _Years;

            set
            {
                if(_Years != value)
                {
                    _Years = value;

                    OnPropertyChanged(nameof(Years));
                }
            }
        }

        public int SelectedMonthIndex
        {
            get => _SelectedMonthIndex;

            set
            {
                if(_SelectedMonthIndex != value)
                {
                    _SelectedMonthIndex = value;

                    OnPropertyChanged(nameof(SelectedMonthIndex));
                }
            }
        }

        private int _SelectedYearIndex;

        public int SelectedYearIndex
        {
            get => _SelectedYearIndex;

            set
            {
                if(_SelectedYearIndex != value)
                {
                    _SelectedYearIndex = value;

                    OnPropertyChanged(nameof(SelectedYearIndex));
                }
            }
        }

        public KilometerauslastungsView()
        {
            InitializeComponent();

            DataContext = this;

            var monthIndex = DateTime.Now.Month - 2;

            SelectedMonthIndex = monthIndex < 0 ? 11 : monthIndex;

            InitYearComboBox();

            ServiceFacade.DoCustomerServiceAsync(s => s.GetAllActiveCustomersCompact(false, BeWoApp.LoggedOnEmployeeOid), allCustomers =>
            {
                this.Dispatch(() =>
                {
                    if(BeWoApp.LoggedOnUser.HasRight(UserRightType.ViewAll) || BeWoApp.LoggedOnUser.HasRight(UserRightType.CustomerView_View))
                    {
                        AllCustomers = allCustomers;
                    }
                    else
                    {
                        if(BeWoApp.LoggedOnUser.HasRight(UserRightType.Customer_ViewMyTeams))
                        {
                            AllCustomers = allCustomers.Where(customer => customer.IsRelatedToTeam || customer.IsRelatedToEmployee).ToList();
                        }
                        else if(BeWoApp.LoggedOnUser.HasRight(UserRightType.Customer_ViewMyCustomers))
                        {
                            AllCustomers = allCustomers.Where(customer => customer.IsRelatedToEmployee).ToList();
                        }
                    }
                });
            });

            ThemeManager.SetTheme(BeWoApp.CurrentBeWo.MainWindow, Theme.Office2010Black);

            Unloaded += delegate
            {
                ThemeManager.SetTheme(BeWoApp.CurrentBeWo.MainWindow, null);
            };
        }

        private void InitYearComboBox()
        {
            var years = new List<int> {DateTime.Now.Year};

            for(var i = 0; i < 10; i++)
            {
                years.Add(DateTime.Now.Year - i);
            }

            Years = years;
        }

        private void PopUpEdit_OnPopUpClick(object sender, RoutedEventArgs e)
        {
            CustomerSearchViewPopup.IsOpen = true;
        }

        private void CustomerSearchViewPopup_CustomerSelected(object sender, EventArgs<CompactCustomerDC> e)
        {
            SelectedCustomer = e.Data;
            CustomerSearchViewPopup.IsOpen = false;
        }

        public event PropertyChangedEventHandler PropertyChanged;

        [NotifyPropertyChangedInvocator]
        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        private void ButtonGenerate_OnClick(object sender, RoutedEventArgs e)
        {
            var selectedYear = Years[SelectedYearIndex];

            var rangeDate = new DateTime(selectedYear, SelectedMonthIndex + 1, 1);

            var end = rangeDate.AddMonths(1).AddDays(-1);

            var timeSpan = new DateTimeSpan(rangeDate, end);

            var customerOids = _ShouldDoListReport ? AllCustomers.Select(customer => customer.CustomerOid).ToList() : new List<long> {SelectedCustomer.CustomerOid};

            ServiceFacade.DoReportServiceAsync(rs => rs.CheckForAnyServiceRecordsWithDistanceValues(customerOids, timeSpan), hasAny =>
            {
                if(hasAny)
                {
                    if(_ShouldDoListReport)
                    {
                        ServiceFacade.DoReportServiceAsync(s => s.CreateKilometerauswertungForAllCustomers(AllCustomers.Select(customer => customer.CustomerOid).ToList(), rangeDate), ShowReport, true);
                    }
                    else
                    {
                        ServiceFacade.DoReportServiceAsync(s => s.CreateKilometerauswertung(SelectedCustomer.CustomerOid, rangeDate), ShowReport, true);
                    }
                }
                else
                {
                    this.Dispatch(() => { MessageBox.Show("Der ausgewählte Zeitraum enthält keinerlei Buchungen mit Angaben zu gefahreren Kilometern", "Kilometerauswertung", MessageBoxButton.OK, MessageBoxImage.Warning); });
                }
            });
        }

        private void ShowReport(MemoryStream reportStream)
        {
            if(reportStream == null)
            {
                return;
            }

            this.Dispatch(() =>
            {
                var report = new XtraReport();

                try
                {
                    report.PrintingSystem.LoadDocument(reportStream);
                }
                catch(Exception exception)
                {
                    MessageBox.Show("Beim Öffnen der Druckvorschau ist leider ein Fehler aufgetreten!", "Fehler", MessageBoxButton.OK, MessageBoxImage.Exclamation);
                }

                reportStream.Close();
                reportStream.Dispose();

                DocumentPreviewControl.DocumentSource = report;
                DocumentPreviewControl.Visibility = Visibility.Visible;
            });
        }

        private void AllCustomersCheckBox_OnCheckedChanged(object sender, RoutedEventArgs e)
        {
            _ShouldDoListReport = AllCustomersCheckBox.IsChecked.HasValue && AllCustomersCheckBox.IsChecked.Value;
            OnPropertyChanged(nameof(IsCreateButtonEnabled));
        }
    }
}