using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Forms;
using com.sun.tools.@internal.ws.processor.model;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using Syncfusion.Data.Extensions;
using Syncfusion.UI.Xaml.Grid;
using Syncfusion.UI.Xaml.Grid.Helpers;
using HorizontalAlignment = System.Windows.HorizontalAlignment;
using MessageBox = System.Windows.MessageBox;
using OpenFileDialog = Microsoft.Win32.OpenFileDialog;
using UserControl = System.Windows.Controls.UserControl;

namespace PRSDesktop
{
    public class MileStoneBlock
    {
        public Guid ID { get; set; }
        public String Revision { get; set; }
        public JobDocumentSetMileStoneStatus Status { get; set; }
        public DateTime Date { get; set; }
        public System.Drawing.Color Color { get; set; }
    }

    
    public class MileStoneConverter : IValueConverter
    {
        public object Convert(object value, Type t, object parameter, CultureInfo culture)
        {
            try
            {
                if (value == null)
                    return "";
                var block = Serialization.Deserialize<MileStoneBlock>(value.ToString());
                if (String.Equals(parameter, "ID"))
                    return block.ID;
                if (String.Equals(parameter, "Revision"))
                    return String.IsNullOrWhiteSpace(block.Revision) ? "--" : String.Format("Rev {0}",block.Revision);
                if (String.Equals(parameter, "Status"))
                    return block.Status.ToString().SplitCamelCase();
                if (String.Equals(parameter, "Date"))
                    return String.Format("{0:dd MMM yy}", block.Date);
                if (String.Equals(parameter, "Color"))
                    return "Red"; //ImageUtils.ColorToString(block.Color);

                return parameter.ToString();
            }
            catch (Exception e)
            {
                return e.Message;
            }
        }

        public object ConvertBack(object value, Type t, object parameter, CultureInfo culture)
        {
            return value.Equals(false) ? DependencyProperty.UnsetValue : parameter;
        }
    }
    
    public partial class JobDocumentSetGrid : UserControl
    {
       
        private struct MileStone
        {
            public Guid TypeID { get; set; }
            public CoreRow Row { get; set; }
        }
        
        private struct MileStoneType
        {
            public String Code { get; set; }
            public String Description { get; set; }
            public Dictionary<Guid,List<CoreRow>> SetMileStones { get; set; }
            public List<String> Columns { get; set; }
        }
        
        public Guid JobID { get; set; }
        public Guid FolderID { get; set; }

        private Dictionary<Guid,MileStoneType> _types = null;
        private CoreTable _milestones = null;
        private CoreTable _documentSets = null;
        private CoreTable _files = null;
        
        public JobDocumentSetGrid()
        {
            InitializeComponent();
            AddImage.Source = PRSDesktop.Resources.add.AsBitmapImage();
            EditImage.Source = PRSDesktop.Resources.pencil.AsBitmapImage();
            DeleteImage.Source = PRSDesktop.Resources.delete.AsBitmapImage();
        }

        private Dictionary<JobDocumentSetMileStoneStatus, System.Drawing.Color> _statuscolors = new Dictionary<JobDocumentSetMileStoneStatus, Color>()
        {
            { JobDocumentSetMileStoneStatus.InProgress, System.Drawing.Color.LightYellow },
            { JobDocumentSetMileStoneStatus.OnHold, System.Drawing.Color.Silver },
            { JobDocumentSetMileStoneStatus.InfoRequired, System.Drawing.Color.Silver },
            { JobDocumentSetMileStoneStatus.Submitted, System.Drawing.Color.Orange },
            { JobDocumentSetMileStoneStatus.Approved, System.Drawing.Color.LightGreen },
            { JobDocumentSetMileStoneStatus.Rejected, System.Drawing.Color.Gray },
            { JobDocumentSetMileStoneStatus.Cancelled, System.Drawing.Color.Gray },

        };

        public void Refresh()
        {

            var setfilter = new Filter<JobDocumentSet>(x => x.Job.ID).IsEqualTo(JobID);
            if (FolderID != Guid.Empty)
                setfilter = setfilter.And(x => x.Folder.ID).IsEqualTo(FolderID);
            
            MultiQuery query = new MultiQuery();
            query.Add(
                setfilter,
                new Columns<JobDocumentSet>(x=>x.ID)
                    .Add(x=>x.Code)
                    .Add(x=>x.Description)
            );
                
                var milestonefilter = new Filter<JobDocumentSetMileStone>(x => x.DocumentSet.Job.ID).IsEqualTo(JobID);
                if (FolderID != Guid.Empty)
                    milestonefilter = milestonefilter.And(x => x.DocumentSet.Folder.ID).IsEqualTo(FolderID);
                
            query.Add(
                milestonefilter,
                new Columns<JobDocumentSetMileStone>(x => x.ID)
                    .Add(x=>x.DocumentSet.ID)
                    .Add(x => x.Type.ID)
                    .Add(x => x.Type.Code)
                    .Add(x => x.Status)
                    .Add(x => x.Revision)
                    .Add(x => x.Submitted)
                    .Add(x => x.Closed)
            );
            
            if (_types == null)
            {
                query.Add<JobDocumentSetMileStoneType>(
                    null,
                    new Columns<JobDocumentSetMileStoneType>(x => x.ID)
                        .Add(x => x.Code)
                        .Add(x => x.Description),
                    new SortOrder<JobDocumentSetMileStoneType>(x => x.Sequence)
                );
            }

            query.Query();

            _documentSets = query.Get<JobDocumentSet>();
            _milestones = query.Get<JobDocumentSetMileStone>();

            if (_types == null)
            {
                _types = query.Get<JobDocumentSetMileStoneType>().ToDictionary<JobDocumentSetMileStoneType, Guid, MileStoneType>(
                    x => x.ID,
                    r => new MileStoneType()
                    {
                        Code = r.Get<JobDocumentSetMileStoneType, String>(c => c.Code),
                        Description = r.Get<JobDocumentSetMileStoneType, String>(c => c.Description),
                        SetMileStones = new Dictionary<Guid, List<CoreRow>>(),
                        Columns = new List<string>()
                    }
                );
            }
            else
            {
                foreach (var typeid in _types.Keys)
                    _types[typeid].SetMileStones.Clear();
            }
            
            var documentsets = new DataTable();
            documentsets.Columns.Add("ID", typeof(Guid));
            documentsets.Columns.Add("Code", typeof(String));
            documentsets.Columns.Add("Description", typeof(String));
            
            var milestones = _milestones.ToLookup<JobDocumentSetMileStone, Guid, MileStone>(
                x => x.DocumentSet.ID,
                r => new MileStone()
                {
                    TypeID = r.Get<JobDocumentSetMileStone, Guid>(c => c.Type.ID),
                    Row = r
                }
            );
            
            foreach (var milestone in milestones)
            {
                foreach (var entry in milestone)
                {
                    if (!_types[entry.TypeID].SetMileStones.ContainsKey(milestone.Key))
                        _types[entry.TypeID].SetMileStones[milestone.Key] = new List<CoreRow>();
                    if (_hidesuperceded)
                        _types[entry.TypeID].SetMileStones[milestone.Key].Clear();
                    _types[entry.TypeID].SetMileStones[milestone.Key].Add(entry.Row);
                }
            }
            
            foreach (var typeid in _types.Keys)
            {
                int count = 1;
                foreach (var setkey in _types[typeid].SetMileStones.Keys)
                    count = Math.Max(count,_types[typeid].SetMileStones[setkey].Count);
                for (int i = 1; i <= count; i++)
                {
                    String column = String.Format("{0}_{1}", _types[typeid].Code, i);
                    documentsets.Columns.Add(column, typeof(String));
                    _types[typeid].Columns.Add(column);
                }
            }

            foreach (var setrow in _documentSets.Rows)
            {
                Guid setid = setrow.Get<JobDocumentSet, Guid>(x => x.ID);

                var datarow = documentsets.Rows.Add();
                
                datarow["ID"] = setid;
                datarow["Code"] = setrow.Get<JobDocumentSet, String>(c => c.Code);
                datarow["Description"] = setrow.Get<JobDocumentSet, String>(c => c.Description);
                
                foreach (var typeid in _types.Keys)
                {
                    if (_types[typeid].SetMileStones.TryGetValue(setid, out var rows))
                    {
                        int i = 1;
                        foreach (var row in rows)
                        {
                            MileStoneBlock block = new MileStoneBlock();
                            block.ID =  row.Get<JobDocumentSetMileStone, Guid>(c => c.ID);
                            block.Revision = row.Get<JobDocumentSetMileStone, String>(c => c.Revision);
                            block.Status = row.Get<JobDocumentSetMileStone, JobDocumentSetMileStoneStatus>(c => c.Status);
                            block.Date = row.Get<JobDocumentSetMileStone, DateTime>(c => c.Closed);
                            if (block.Date.IsEmpty())
                                block.Date = row.Get<JobDocumentSetMileStone, DateTime>(c => c.Submitted);
                            block.Color = _statuscolors[block.Status];
                            datarow[String.Format("{0}_{1}", _types[typeid].Code, i)] = Serialization.Serialize(block);
                            i++;
                        }
                    }
                }
            }

            dataGrid.ItemsSource = null;
            
            stackedHeaderRow.StackedColumns.Clear();
            stackedHeaderRow.StackedColumns.Add(new StackedColumn()
            {
                ChildColumns = "ID,Code,Description", 
                HeaderText = "Document Register"
            });
            foreach (var typeid in _types.Keys)
            {
                stackedHeaderRow.StackedColumns.Add(new StackedColumn()
                {
                    ChildColumns = String.Join(",", _types[typeid].Columns), 
                    HeaderText = _types[typeid].Code
                });
            }
            
            dataGrid.ItemsSource = documentsets;
        }

        private void DataGrid_AutoGeneratingColumn(object sender, AutoGeneratingColumnArgs e)
        {
            e.Column.HorizontalHeaderContentAlignment = HorizontalAlignment.Center;
            if (String.Equals(e.Column.MappingName, "ID"))
                e.Column.Width = 0;
            else if (String.Equals(e.Column.MappingName, "Code"))
                e.Column.Width = 120;
            else if (String.Equals(e.Column.MappingName, "Description"))
            {
                e.Column.ColumnSizer = GridLengthUnitType.Star;
                e.Column.MinimumWidth = 200;
            }
            else
            {
                var mapping = e.Column.MappingName;
                e.Column = new GridTemplateColumn()
                {
                    CellTemplate = FindResource("milestoneTemplate") as DataTemplate,
                    MappingName = mapping,
                    SetCellBoundValue = true
                };
                e.Column.HeaderText = " "; //mapping.Split('_').Last();
                e.Column.Width = 80;
            }
            //throw new NotImplementedException();
        }

        private void DataGrid_OnQueryRowHeight(object sender, QueryRowHeightEventArgs e)
        {
            if (e.RowIndex == 0)
            {
                e.Height = 30;
                e.Handled = true;
            }
        }
        
        private void DataGrid_ContextMenuOpening(object sender, ContextMenuEventArgs e)
        { 
            var tag = (e.OriginalSource as FrameworkElement).Tag;
            if (tag == null)
            {
                e.Handled = true;
                return;
            }

            MileStoneMenu.Items.Clear();

            Guid.TryParse(tag.ToString(), out Guid id);
            var milestone = _milestones.Rows.FirstOrDefault(r => r.Get<JobDocumentSetMileStone, Guid>(c => c.ID) == id);
            
            if (milestone == null)
            {
                Guid setid = (Guid)(dataGrid.SelectedItem as DataRowView).Row["ID"];
                
                var column = dataGrid.GetSelectedCells().First().Column.MappingName;
                var typeid = _types.FirstOrDefault(x => x.Value.Columns.Contains(column)).Key;
                
                var openmilestones = _milestones.Rows.Any(r =>
                    Guid.Equals(r.Get<JobDocumentSetMileStone, Guid>(c => c.DocumentSet.ID), setid)
                    && Guid.Equals(r.Get<JobDocumentSetMileStone, Guid>(c => c.Type.ID), typeid)
                    && r.Get<JobDocumentSetMileStone,DateTime>(c=>c.Closed).IsEmpty()
                );
                if (openmilestones)
                {
                    e.Handled = true;
                    return;
                }
                MenuItem newmilestone = new MenuItem()
                {
                    Header = "New Milestone",
                    Tag = typeid
                };
                newmilestone.Click += (o, args) => { CreateMileStone(setid, typeid); };
                MileStoneMenu.Items.Add(newmilestone);
                return;
            }
            
            var status = milestone.Get<JobDocumentSetMileStone, JobDocumentSetMileStoneStatus>(c => c.Status);

            MenuItem setstatus = new MenuItem() { Header = "Change Status" };
            foreach (JobDocumentSetMileStoneStatus newstatus in Enum.GetValues(typeof(JobDocumentSetMileStoneStatus)))
            {
                if (newstatus != status)
                {
                    MenuItem setstatus2 = new MenuItem() { Header = newstatus.ToString().SplitCamelCase() };
                    setstatus2.Click += (o, args) => { ChangeMileStoneStatus(milestone, newstatus); }; 
                    setstatus.Items.Add(setstatus2);
                }
            }
            MileStoneMenu.Items.Add(setstatus);
            
            MenuItem editmilestone = new MenuItem() { Header = "Edit MileStone" };
            editmilestone.Click += (o, args) => { EditMileStone(milestone); }; 
            MileStoneMenu.Items.Add(editmilestone);
            
            var closed = milestone.Get<JobDocumentSetMileStone, DateTime>(c => c.Closed);
            
            if (closed.IsEmpty())
            {

                MenuItem upload = new MenuItem() { Header = "Upload Files" };
                upload.Click += (o, args) => { UploadFiles(milestone); };
                MileStoneMenu.Items.Add(upload);
            }
            
            MileStoneMenu.Items.Add(new Separator());
            
            MenuItem download = new MenuItem() { Header = "Download Files" };
            download.SubmenuOpened += (o, e) =>
            {
                
                var files = new Client<JobDocumentSetMileStoneFile>().Query(
                    new Filter<JobDocumentSetMileStoneFile>(x => x.EntityLink.ID).IsEqualTo(id),
                    new Columns<JobDocumentSetMileStoneFile>(x => x.ID)
                        .Add(x => x.DocumentLink.FileName)
                        .Add(x => x.DocumentLink.ID),
                    new SortOrder<JobDocumentSetMileStoneFile>(x => x.DocumentLink.FileName)
                );
                
                foreach (var row in files.Rows)
                {
                    MenuItem downloadone = new MenuItem()
                    {
                        Header = row.Get<JobDocumentSetMileStoneFile,String>(x=>x.DocumentLink.FileName),
                        Tag = row.Get<JobDocumentSetMileStoneFile,Guid>(x=>x.DocumentLink.ID)
                    };
                    downloadone.Click += (sender, args) => { DownloadFiles(milestone, new Guid[] { (Guid)downloadone.Tag }); }; 
                    download.Items.Insert(download.Items.Count-1,downloadone);                        
                }

                if (files.Rows.Any())
                {
                    download.Items.Insert(download.Items.Count-1,new Separator());
                    (download.Items[download.Items.Count - 1] as MenuItem).Tag =
                        files.ExtractValues<JobDocumentSetMileStoneFile, Guid>(x => x.DocumentLink.ID, true).ToArray();
                    (download.Items[download.Items.Count-1] as MenuItem).IsEnabled = true;
                }

            };
            MenuItem downloadall = new MenuItem()
            {
                Header = "Download All",
                IsEnabled = false
            };
            downloadall.Click += (sender, args) => { DownloadFiles(milestone, (Guid[])downloadall.Tag); }; 
            download.Items.Add(downloadall);
            MileStoneMenu.Items.Add(download);
            
            Guid newsetid = (Guid)(dataGrid.SelectedItem as DataRowView).Row["ID"];
                
            var newcolumn = dataGrid.GetSelectedCells().First().Column.MappingName;
            var newtypeid = _types.FirstOrDefault(x => x.Value.Columns.Contains(newcolumn)).Key;
                
            var newopenmilestones = _milestones.Rows.Any(r =>
                Guid.Equals(r.Get<JobDocumentSetMileStone, Guid>(c => c.DocumentSet.ID), newsetid)
                && Guid.Equals(r.Get<JobDocumentSetMileStone, Guid>(c => c.Type.ID), newtypeid)
                && r.Get<JobDocumentSetMileStone,DateTime>(c=>c.Closed).IsEmpty()
            );
            if (!newopenmilestones)
            {

                MileStoneMenu.Items.Add(new Separator());
                MenuItem newmilestone2 = new MenuItem()
                {
                    Header = "New Milestone",
                    Tag = newtypeid
                };
                newmilestone2.Click += (o, args) => { CreateMileStone(newsetid, newtypeid); };
                MileStoneMenu.Items.Add(newmilestone2);
            }

            MileStoneMenu.Items.Add(new Separator());
            MenuItem delete = new MenuItem { Header = "Delete MileStone" };
            delete.Click += (o, args) => DeleteMileStone(milestone);
            MileStoneMenu.Items.Add(delete);
        }

        private void DownloadFiles(CoreRow row, Guid[] ids)
        {
            var status = row.Get<JobDocumentSetMileStone, JobDocumentSetMileStoneStatus>(c => c.Status);
            var stage = row.Get<JobDocumentSetMileStone, String>(c => c.Type.Code);
            var revision = row.Get<JobDocumentSetMileStone, String>(c => c.Revision);

            String tag = String.Format(" - {0}{1} ({2})", stage, String.IsNullOrWhiteSpace(revision) ? "" : " - Rev " + revision,
                status.ToString().SplitCamelCase());
            
            FolderBrowserDialog dlg = new FolderBrowserDialog();
            if (dlg.ShowDialog() == DialogResult.OK)
            {
                Progress.ShowModal("Downloading Files", (progress) =>
                {
                    var files = new Client<Document>().Query(
                        new Filter<Document>(x => x.ID).InList(ids)
                    );

                    foreach (var row in files.Rows)
                    {
                        string filename = row.Get<Document, String>(c => c.FileName);
                        string extension = Path.GetExtension(filename);
                        string basefilename = Path.GetFileNameWithoutExtension(filename);
                        filename = String.Format("{0}{1}{2}", basefilename, tag, extension);
                        filename = Path.Combine(dlg.SelectedPath, filename);
                        File.WriteAllBytes(filename, row.Get<Document, byte[]>(c => c.Data));
                    }
                    
                });
            }
        }
        

        private void UploadFiles(CoreRow row)
        {

            Guid id = row.Get<JobDocumentSetMileStone, Guid>(c => c.ID);
            
            OpenFileDialog dlg = new OpenFileDialog();
            dlg.Filter = "PDF Files (*.pdf)|*.pdf";
            dlg.Multiselect = true;
            if ((dlg.ShowDialog() == true) && (dlg.FileNames.Length > 0))
            {
                Progress.ShowModal("Uploading Files", (progress) =>
                {
                    List<Document> documents = new List<Document>();
                    foreach (var file in dlg.FileNames)
                    {
                        var data = File.ReadAllBytes(file);
                        documents.Add(
                            new Document()
                            {
                                FileName = Path.GetFileName(file).ToLower(),
                                Data = data,
                                CRC = CoreUtils.CalculateCRC(data),
                                TimeStamp = new FileInfo(file).LastWriteTime
                            }
                        );
                    }
                    new Client<Document>().Save(documents.ToArray(), "Uploaded by User");

                    progress.Report("Updating Links");
                    List<JobDocumentSetMileStoneFile> links = new List<JobDocumentSetMileStoneFile>();
                    foreach (var document in documents)
                    {
                        var link = new JobDocumentSetMileStoneFile();
                        link.EntityLink.ID = id;
                        link.DocumentLink.ID = document.ID;
                        links.Add(link);
                    }
                    new Client<JobDocumentSetMileStoneFile>().Save(links, "Uploaded By User");
                });
                MessageBox.Show(String.Format("{0} files uploaded", dlg.FileNames.Length));
            }
        }

        private void CreateMileStone(Guid setid, Guid typeid)
        {
            JobDocumentSetMileStone milestone = new JobDocumentSetMileStone();
            milestone.DocumentSet.ID = setid;
            milestone.Type.ID = typeid;
            milestone.Status = JobDocumentSetMileStoneStatus.InProgress;
            var grid = new JobDocumentSetMileStoneGrid();
            if (grid.EditItems(new[] { milestone}))
                Refresh();
        }

        private void ChangeMileStoneStatus(CoreRow row, JobDocumentSetMileStoneStatus newstatus)
        {
            var milestone = row.ToObject<JobDocumentSetMileStone>();
            milestone.Status = newstatus;
            new Client<JobDocumentSetMileStone>().Save(milestone, "Changed Status to " + newstatus.ToString().SplitCamelCase());
            Refresh();
        }

        private void EditMileStone(CoreRow row)
        {
            var milestone = new Client<JobDocumentSetMileStone>().Query(
                new Filter<JobDocumentSetMileStone>(x => x.ID).IsEqualTo(row.Get<JobDocumentSetMileStone, Guid>(x => x.ID))
            ).Rows.FirstOrDefault()?.ToObject<JobDocumentSetMileStone>();
            var grid = new JobDocumentSetMileStoneGrid();
            if (grid.EditItems(new[] { milestone }))
                Refresh();
        }

        private void DeleteMileStone(CoreRow row)
        {
            var milestone = row.ToObject<JobDocumentSetMileStone>();
            new Client<JobDocumentSetMileStone>().Delete(milestone,"Deleted by User");
            Refresh();
        }

        private void Add_OnClick(object sender, RoutedEventArgs e)
        {
            JobDocumentSet set = new JobDocumentSet();
            set.Job.ID = JobID;
            set.Folder.ID = FolderID;
            var grid = new DynamicDataGrid<JobDocumentSet>();
            if (grid.EditItems(new[] { set }))
                Refresh();
        }

        private void Edit_OnClick(object sender, RoutedEventArgs e)
        {
            Guid setid = (Guid)(dataGrid.SelectedItem as DataRowView).Row["ID"];
            var set = new Client<JobDocumentSet>().Query(
                new Filter<JobDocumentSet>(x => x.ID).IsEqualTo(setid)
            ).Rows.FirstOrDefault()?.ToObject<JobDocumentSet>();
            var grid = new DynamicDataGrid<JobDocumentSet>();
            if (grid.EditItems(new[] { set }))
                Refresh();

        }

        private void Delete_OnClick(object sender, RoutedEventArgs e)
        {
            Guid setid = (Guid)(dataGrid.SelectedItem as DataRowView).Row["ID"];
            var set = new JobDocumentSet() { ID = setid };
            new Client<JobDocumentSet>().Delete(set, "Deleted By User");
            Refresh();
        }

        private bool _hidesuperceded = false;
        
        private void HideRejected_OnClick(object sender, RoutedEventArgs e)
        {
            _hidesuperceded = !_hidesuperceded;
            HideSupercededLabel.Content = _hidesuperceded ? "Show All" : "Last Only";
            Refresh();
        }
    }
}