using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Linq.Expressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.WPF;
using Microsoft.Win32;
using PRSDesktop.WidgetGroups;
using Syncfusion.UI.Xaml.Charts;
using Syncfusion.XlsIO;

namespace PRSDesktop
{
    public class FactoryProductivityDashboardProperties : IDashboardProperties
    {
        public string Test { get; set; } = "Untitled";
    }

    public class FactoryProductivityDashboardElement : DashboardElement<FactoryProductivityDashboard, Manufacturing, FactoryProductivityDashboardProperties> { }

    /// <summary>
    ///     Interaction logic for FactoryProductivity.xaml
    /// </summary>
    public partial class FactoryProductivityDashboard : UserControl, 
        IPanel<ManufacturingHistory>, 
        IDashboardWidget<Manufacturing, FactoryProductivityDashboardProperties>
    {
        public enum HistoryView
        {
            Day,
            Week,
            Month,
            Year
        }

        public enum ItemsGroup
        {
            Packet,
            Setout,
            Job
        }

        public enum StaffGroup
        {
            Employee,
            Section
        }

        private readonly BitmapImage back = PRSDesktop.Resources.back.AsBitmapImage(32, 32);

        private HistoryViewModel history;
        private readonly BitmapImage next = PRSDesktop.Resources.next.AsBitmapImage(32, 32);

        public FactoryProductivityDashboard()
        {
            InitializeComponent();

            PrevDay.Content = new Image { Source = back };
            NextDay.Content = new Image { Source = next };
        }

        public bool IsReady { get; set; }

        public event DataModelUpdateEvent OnUpdateDataModel;

        public void CreateToolbarButtons(IPanelHost host)
        {
        }

        public string SectionName => "Factory Productivity";

        public FactoryProductivityDashboardProperties Properties { get; set; }

        public DataModel DataModel(Selection selection)
        {
            if (history.To == DateTime.MinValue)
                history.To = DateTime.Today;
            return new AutoDataModel<ManufacturingHistory>(history.GetFilter());
        }

        public void Refresh()
        {
            if (history.To == DateTime.MinValue)
                history.To = DateTime.Today;

            if (history.View == HistoryView.Day)
                CurrentDate.Text = string.Format("{0:ddd, dd MMMM yyyy}", history.To);
            else
                CurrentDate.Text = string.Format("{0:dd MMM yy} - {1:dd MMM yy}", history.From, history.To);

            //List<Color> colors = new List<Color>();
            //var props = typeof(Colors).GetProperties(System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public).Where(x => x.PropertyType == typeof(Color));
            //foreach (var prop in props)
            //{
            //    Color color = (Color)prop.GetValue(null);
            //    if ((color != Colors.Transparent) && (color.R < color.G) && (color.R < color.B))
            //        colors.Add(color);
            //}

            Hours.Series.Clear();
            foreach (var key in history.Items.Keys)
            {
                var comps = key.Split('|');

                var seriesdata = history.Items[key];
                var series = new StackingColumnSeries();
                series.ShowTooltip = true;
                series.TooltipTemplate = Hours.Resources["tooltipTemplate"] as DataTemplate;
                series.ItemsSource = seriesdata;
                series.XBindingPath = "Name";
                series.YBindingPath = "Hours";
                series.Label = comps[1];
                //int colorindex = Hours.Series.Count % colors.Count;
                //var color = colors[colorindex];
                var color = Colors.Transparent;
                try
                {
                    color = (Color)ColorConverter.ConvertFromString(comps[0]);
                }
                catch (Exception e)
                {
                    Logger.Send(LogType.Error, "", string.Format("*** Unknown Error: {0}\n{1}", e.Message, e.StackTrace));
                }

                series.Interior = new SolidColorBrush(color);
                series.Stroke = new SolidColorBrush(Colors.Black);
                series.StrokeThickness = 0.75F;
                series.BorderBrush = new SolidColorBrush(Colors.Black);
                series.BorderThickness = new Thickness(0.75F, 0.75F, 00.75F, 0.0F);
                series.MouseDoubleClick += (o, e) =>
                {
                    foreach (var other in Hours.Series.Where(x => x != series))
                        other.Visibility = other.Visibility == Visibility.Collapsed ? Visibility.Visible : Visibility.Collapsed;
                };
                Hours.Series.Add(series);
            }
        }

        public Dictionary<string, object[]> Selected()
        {
            return new Dictionary<string, object[]>();
        }

        public void Setup()
        {
            history = new HistoryViewModel();
            DataContext = history;

            var legends = new ChartLegendCollection();

            Hours.Legend = new ChartLegend
            {
                LegendPosition = LegendPosition.Outside,
                DockPosition = ChartDock.Top,
                //FontSize = 11,
                ItemsPanel = Hours.Resources["itemPanelTemplate"] as ItemsPanelTemplate,
                CheckBoxVisibility = Visibility.Visible,
                ToggleSeriesVisibility = true
            };
        }

        public void Shutdown()
        {
        }

        public void Heartbeat(TimeSpan time)
        {
        }

        private void CurrentDate_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            history.To = DateTime.Today;
            Refresh();
        }

        private void PrevDay_Click(object sender, RoutedEventArgs e)
        {
            history.Back();
            Refresh();
        }

        private void NextDay_Click(object sender, RoutedEventArgs e)
        {
            history.Forward();
            Refresh();
        }

        private void ViewStyle_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (history == null)
                return;
            history.View = ViewStyle.SelectedIndex == 0 ? HistoryView.Day :
                ViewStyle.SelectedIndex == 1 ? HistoryView.Week :
                ViewStyle.SelectedIndex == 2 ? HistoryView.Month : HistoryView.Year;
            Refresh();
        }

        private void StaffView_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (history == null)
                return;
            history.StaffGroup = StaffView.SelectedIndex == 0 ? StaffGroup.Employee : StaffGroup.Section;
            Refresh();
        }

        private void ItemsView_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (history == null)
                return;
            history.ItemsGroup = ItemsView.SelectedIndex == 0 ? ItemsGroup.Packet : ItemsView.SelectedIndex == 1 ? ItemsGroup.Setout : ItemsGroup.Job;
            Refresh();
        }

        private void Search_KeyUp(object sender, KeyEventArgs e)
        {
            if (string.IsNullOrWhiteSpace(Search.Text) || e.Key == Key.Return)
            {
                history.Search = Search.Text;
                Refresh();
            }
        }

        private void Export_Click(object sender, RoutedEventArgs e)
        {
            var excelEngine = new ExcelEngine();
            var application = excelEngine.Excel;
            var myWorkbook = excelEngine.Excel.Workbooks.Add();
            myWorkbook.Version = ExcelVersion.Excel2007;
            var mySheet = myWorkbook.Worksheets[0];

            var iCol = 2;
            foreach (var key in history.Items.Keys)
            {
                mySheet.Range[1, iCol].Text = key;
                var records = history.Items[key];
                var iRow = 2;
                foreach (var record in records)
                {
                    mySheet.Range[iRow, 1].Text = record.Name;
                    mySheet.Range[iRow, iCol].Number = Math.Truncate(record.Hours * 100.0F) / 100.0F;
                    iRow++;
                }

                iCol++;
            }

            mySheet.UsedRange.AutofitColumns();
            foreach (var col in mySheet.UsedRange.Columns)
                col.ColumnWidth += 5;
            foreach (var row in mySheet.UsedRange.Rows)
            {
                row.RowHeight += 5;
                row.VerticalAlignment = ExcelVAlign.VAlignCenter;
            }

            var dlg = new SaveFileDialog();
            dlg.Filter = "Excel Files (*.xlsx)|*.xlsx";
            dlg.FileName = "Factory KPI Screen.xlsx";
            if (dlg.ShowDialog() == true)
                try
                {
                    myWorkbook.SaveAs(dlg.FileName, ExcelSaveType.SaveAsXLS);
                    Process.Start(new ProcessStartInfo(dlg.FileName) { UseShellExecute = true });
                }
                catch (Exception e2)
                {
                    MessageBox.Show("Error saving spreadhseet!\n\n" + e2.Message);
                }
        }

        public class History
        {
            public string Name { get; set; }

            //public int QAPackets { get; set; }
            public int Packets { get; set; }

            //public double QAHours { get; set; }
            public double Hours { get; set; }
            public double LostTime { get; set; }
        }

        public class HistoryViewModel
        {
            private ItemsGroup _itemsgroup = ItemsGroup.Job;

            private string _search = "";

            private StaffGroup _staffgroup = StaffGroup.Employee;

            private DateTime _to = DateTime.MinValue;

            private HistoryView _view = HistoryView.Day;

            public HistoryViewModel()
            {
                Staff = new List<History>();
                Items = new Dictionary<string, List<History>>();
            }

            public StaffGroup StaffGroup
            {
                get => _staffgroup;
                set
                {
                    _staffgroup = value;
                    Refresh();
                }
            }

            public List<History> Staff { get; }

            public ItemsGroup ItemsGroup
            {
                get => _itemsgroup;
                set
                {
                    _itemsgroup = value;
                    Refresh();
                }
            }

            // Key = series
            public Dictionary<string, List<History>> Items { get; set; }

            public HistoryView View
            {
                get => _view;
                set
                {
                    _view = value;
                    Refresh();
                }
            }

            public DateTime To
            {
                get => _to.Date;
                set
                {
                    _to = value;
                    Refresh();
                }
            }

            public DateTime From => _view.Equals(HistoryView.Day) ? _to :
                _view.Equals(HistoryView.Week) ? _to.AddDays(-6) :
                _view.Equals(HistoryView.Month) ? _to.AddMonths(-1).AddDays(1) : _to.AddYears(-1).AddDays(1);

            public string Search
            {
                get => _search;
                set
                {
                    _search = value;
                    Refresh();
                }
            }

            public void Forward()
            {
                To = _view.Equals(HistoryView.Day) ? _to.AddDays(1) :
                    _view.Equals(HistoryView.Week) ? _to.AddDays(7) :
                    _view.Equals(HistoryView.Month) ? _to.AddMonths(1) : _to.AddYears(1);
            }

            public void Back()
            {
                To = _view.Equals(HistoryView.Day) ? _to.AddDays(-1) :
                    _view.Equals(HistoryView.Week) ? _to.AddDays(-7) :
                    _view.Equals(HistoryView.Month) ? _to.AddMonths(-1) : _to.AddYears(-1);
            }

            private void AddSearchCriteria(Filter<ManufacturingHistory> filter, string search,
                params Expression<Func<ManufacturingHistory, object>>[] expressions)
            {
                var comps = search.Trim().Split(' ');
                foreach (var comp in comps)
                {
                    Filter<ManufacturingHistory> result = null;
                    foreach (var expression in expressions)
                        result = result == null ? new Filter<ManufacturingHistory>(expression).Contains(comp) : result.Or(expression).Contains(comp);
                    filter.Ands.Add(result);
                }
            }

            public Filter<ManufacturingHistory> GetFilter()
            {
                var from = _view.Equals(HistoryView.Day) ? _to.AddDays(-1) :
                    _view.Equals(HistoryView.Week) ? _to.AddDays(-7) :
                    _view.Equals(HistoryView.Month) ? _to.AddMonths(-1) : _to.AddYears(-1);

                var criteria = new Filter<ManufacturingHistory>(x => x.Date).IsGreaterThan(from).And(x => x.Date).IsLessThanOrEqualTo(_to);
                if (!string.IsNullOrWhiteSpace(_search))
                {
                    criteria = criteria.TextSearch(
                        Search,
                        x => x.Packet.SetoutLink.JobLink.JobNumber,
                        x => x.Packet.SetoutLink.JobLink.Name,
                        x => x.Packet.SetoutLink.Number,
                        x => x.Packet.SetoutLink.Description,
                        //x => x.Packet.SetoutLink.Reference,
                        x => x.Packet.SetoutLink.Location,
                        x => x.Packet.Serial,
                        x => x.Packet.Location,
                        x => x.Packet.Title,
                        x => x.LostTime.Description
                    );
                }
                return criteria;
            }

            private void Refresh()
            {
                var criteria = GetFilter();
                var data = new Client<ManufacturingHistory>().Query(
                    criteria,
                    null,
                    new SortOrder<ManufacturingHistory>(x => x.Employee.Name)
                );

                Staff.Clear();
                foreach (var row in data.Rows)
                {
                    var staff = _staffgroup.Equals(StaffGroup.Employee)
                        ? row.Get<ManufacturingHistory, string>(x => x.Employee.Name)
                        : row.Get<ManufacturingHistory, string>(x => x.Section.Name);
                    var record = Staff.FirstOrDefault(x => string.Equals(x.Name, staff));
                    if (record == null)
                    {
                        record = new History { Name = staff };
                        Staff.Add(record);
                    }

                    var hrs = row.Get<ManufacturingHistory, TimeSpan>(x => x.QADuration).TotalHours +
                              row.Get<ManufacturingHistory, TimeSpan>(x => x.WorkDuration).TotalHours;
                    if (Entity.IsEntityLinkValid<ManufacturingHistory, ManufacturingPacketLink>(x => x.Packet, row))
                        record.Hours += hrs;
                    else
                        record.LostTime += hrs;
                    record.Packets += row.Get<ManufacturingHistory, int>(x => x.WorkCompleted);
                }

                Items.Clear();
                foreach (var row in data.Rows)
                {
                    var staff = _staffgroup.Equals(StaffGroup.Employee)
                        ? row.Get<ManufacturingHistory, string>(x => x.Employee.Name)
                        : row.Get<ManufacturingHistory, string>(x => x.Section.Name);

                    var packet = "";
                    if (row.IsEntityLinkValid<ManufacturingHistory, ManufacturingPacketLink>(x => x.Packet))
                        packet = row.Get<ManufacturingHistory, string>(x => x.Packet.SetoutLink.JobLink.Color) + "|" +
                                 (_itemsgroup.Equals(ItemsGroup.Packet) ? row.Get<ManufacturingHistory, string>(x => x.Packet.Serial) :
                                     _itemsgroup.Equals(ItemsGroup.Setout) ? row.Get<ManufacturingHistory, string>(x => x.Packet.SetoutLink.Number) :
                                     row.Get<ManufacturingHistory, string>(x =>
                                         x.Packet.SetoutLink.JobLink.JobNumber)); //row.Get<ManufacturingHistory, int>(x => x.Job.Number).ToString();
                    else if (row.IsEntityLinkValid<ManufacturingHistory, ManufacturingLostTimeLink>(x => x.LostTime))
                        packet = "#FF00FF00|" + row.Get<ManufacturingHistory, string>(x => x.LostTime.Description);
                    else
                        packet = "#FFFF0000|Lost Time";

                    if (!Items.ContainsKey(packet))
                    {
                        var records = new List<History>();
                        foreach (var _staff in Staff)
                            records.Add(new History { Name = _staff.Name });
                        Items[packet] = records;
                    }

                    var record = Items[packet].FirstOrDefault(x => string.Equals(x.Name, staff));
                    record.Packets = record.Packets + row.Get<ManufacturingHistory, int>(x => x.WorkCompleted);
                    record.Hours = record.Hours + row.Get<ManufacturingHistory, TimeSpan>(x => x.QADuration).TotalHours +
                                   row.Get<ManufacturingHistory, TimeSpan>(x => x.WorkDuration).TotalHours;
                }
            }
        }
    }
}