using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using Comal.Classes;
using InABox.Clients;
using InABox.Core;
using InABox.DynamicGrid;
using InABox.WPF;
using NPOI.OpenXmlFormats.Dml;

namespace PRSDesktop
{
    public class MeetingItemTaskGrid : DynamicDataGrid<MeetingItemKanban>
    {
    
        public Guid MeetingID { get; set; }
        public Guid MeetingItemID { get; set; }
        
        public MeetingItemTaskGrid()
        {
            Options.BeginUpdate()
                .Clear()
                .Add(DynamicGridOption.RecordCount)
                .EndUpdate();

            HiddenColumns.Add(x => x.Kanban.Completed);
            ActionColumns.Add(new DynamicImageColumn(StatusImage));

            AddButton("", PRSDesktop.Resources.add.AsBitmapImage(), AddTask);
            AddButton("", PRSDesktop.Resources.link.AsBitmapImage(), LinkTask);
            AddButton("", PRSDesktop.Resources.pencil.AsBitmapImage(), EditTask);
            AddButton("Copy From", null, CopyTasks);
            AddButton("", PRSDesktop.Resources.delete.AsBitmapImage(), DeleteTask, DynamicGridButtonPosition.Right);

        }

        private bool CopyTasks(Button arg1, CoreRow[] arg2)
        {
            var dlg = new MultiSelectDialog<Meeting>(
                new Filter<Meeting>(x=>x.ID).IsNotEqualTo(MeetingID), 
                new Columns<Meeting>(x=>x.ID, x=>x.Number, x=>x.Date, x=>x.Time.Finish), 
                false
            );
            if (dlg.ShowDialog() == true)
            {
                var meeting = dlg.Items().FirstOrDefault();
                if (meeting != null)
                {
                    using (new WaitCursor())
                    {
                        var compfilter = new Filter<MeetingItemKanban>(x => x.Entity.Meeting.ID).IsEqualTo(meeting.ID);
                        compfilter = compfilter.And(new Filter<MeetingItemKanban>(x => x.Kanban.Completed).IsEqualTo(DateTime.MinValue)
                            .Or(x => x.Kanban.Completed).IsGreaterThanOrEqualTo(meeting.Date.Add(meeting.Time.Finish))
                        );
                        var tasks = new Client<MeetingItemKanban>().Query(
                            compfilter,
                            new Columns<MeetingItemKanban>(x => x.Kanban.ID)
                                .Add(x => x.Entity.ID)
                        ).Rows.Select(r => r.ToObject<MeetingItemKanban>());
                        
                        List<MeetingItemKanban> miks = new List<MeetingItemKanban>();
                        
                        foreach (MeetingItemKanban task in tasks)
                        {
                            MeetingItemKanban mik = new MeetingItemKanban();
                            mik.Kanban.ID = task.Kanban.ID;
                            mik.Entity.ID = MeetingItemID;
                            miks.Add(mik);
                        }

                        if (miks.Any())
                        {
                            new Client<MeetingItemKanban>().Save(miks, $"Copied from Meeting #{meeting.Number}");
                            DoChanged();
                            return true;
                        }

                    }
                }
            }

            return false;
        }

        protected override DynamicGridColumns LoadColumns()
        {
            return new DynamicGridColumns()
            {
                new DynamicGridColumn()
                {
                    ColumnName = CoreUtils.GetFullPropertyName<MeetingItemKanban, int>(x => x.Kanban.Number, "."), 
                    Width = 50
                },
                new DynamicGridColumn()
                {
                    ColumnName = CoreUtils.GetFullPropertyName<MeetingItemKanban, String>(x => x.Kanban.Title, "."), 
                    Width = 0
                },
                new DynamicGridColumn()
                {
                ColumnName = CoreUtils.GetFullPropertyName<MeetingItemKanban, String>(x => x.Kanban.EmployeeLink.Code, "."), 
                Width = 100
            }
            };
        }

        private readonly BitmapImage _status = PRSDesktop.Resources.tick.AsBitmapImage();
        
        private BitmapImage? StatusImage(CoreRow? arg)
        {
            return arg == null
                ? _status
                : arg.Get<MeetingItemKanban, DateTime>(c => c.Kanban.Completed).IsEmpty()
                    ? null
                    : _status;
        }

        private bool AddTask(Button arg1, CoreRow[] arg2)
        {
            if (MeetingItemID == Guid.Empty)
                return false;
            
            var kg = DynamicGridUtils.CreateDynamicGrid(typeof(DynamicDataGrid<>), typeof(Kanban));
            kg.OnAfterSave += (editor, items) =>
            {
                List<MeetingItemKanban> miks = new List<MeetingItemKanban>();
                foreach (Kanban item in items.Cast<Kanban>())
                {
                    MeetingItemKanban mik = new MeetingItemKanban();
                    mik.Kanban.ID = item.ID;
                    mik.Entity.ID = MeetingItemID;
                    miks.Add(mik);
                }

                new Client<MeetingItemKanban>().Save(miks, "");
            };
            
            var kanban = new Kanban();
            if (kg.EditItems(new Kanban[] { kanban }) == true)
            {
                DoChanged();
                return true;
            }

            return false;
        }

        private bool LinkTask(Button arg1, CoreRow[] arg2)
        {
            if (MeetingItemID == Guid.Empty)
                return false;
            var dlg = new MultiSelectDialog<Kanban>(
                new Filter<Kanban>(x => x.Completed).IsEqualTo(DateTime.MinValue), 
                new Columns<Kanban>(x=>x.ID), 
                true
            );
            if (dlg.ShowDialog() != true)
                return false;
            if (!dlg.IDs().Any())
                return false;
            
            var miks = new List<MeetingItemKanban>();
            foreach (var id in dlg.IDs())
            {
                var mik = new MeetingItemKanban();
                mik.Entity.ID = MeetingItemID;
                mik.Kanban.ID = id;
                miks.Add(mik);
            }
            new Client<MeetingItemKanban>().Save(miks, "Added To Meeting");
            DoChanged();
            return true;
        }

        private bool EditTask(Button arg1, CoreRow[] arg2)
        {
            if (MeetingItemID == Guid.Empty)
                return false;
            if (!SelectedRows.Any())
                return false;
            var ids = SelectedRows.ToArray().Select(r=>r.Get<MeetingItemKanban,Guid>(x=>x.Kanban.ID)).ToArray();
            var kanbans = new Client<Kanban>().Load(new Filter<Kanban>(x => x.ID).InList(ids));
            var kg = DynamicGridUtils.CreateDynamicGrid(typeof(DynamicDataGrid<>), typeof(Kanban));
            if (kg.EditItems(kanbans) == true)
            {
                DoChanged();
                return true;
            }
            return false;
        }

        private bool DeleteTask(Button arg1, CoreRow[] arg2)
        {
            if (MeetingItemID == Guid.Empty)
                return false;
            if (!SelectedRows.Any())
                return false;

            if (MessageBox.Show("This will unlink the selected task from this meeting, but leave the task active.\n\nDo You wish to continue?",
                    "Unlink Task", MessageBoxButton.YesNo) != MessageBoxResult.Yes)
                return false;

            var ids = SelectedRows.ToArray().Select(r=>r.Get<MeetingItemKanban,Guid>(x=>x.ID)).ToArray();
            var miks = ids.Select(x => new MeetingItemKanban() { ID = x }).ToArray();
            new Client<MeetingItemKanban>().Delete(miks, "Removed from Meeting");
            DoChanged();
            return true;

        }



        protected override void Reload(Filters<MeetingItemKanban> criteria, Columns<MeetingItemKanban> columns, ref SortOrder<MeetingItemKanban> sort,
            Action<CoreTable, Exception> action)
        {
            criteria.Add(MeetingItemID == Guid.Empty
                ? new Filter<MeetingItemKanban>(x=>x.Entity.ID).None()
                : new Filter<MeetingItemKanban>(x => x.Entity.ID).IsEqualTo(MeetingItemID));
            base.Reload(criteria, columns, ref sort, action);
        }
        
    }
}