using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.PPC.Jobs.Models;

namespace Tango.PPC.Jobs.UndoRedoCommands
{
    public class PasteSegmentsCommand : IUndoRedoCommand
    {
        private JobModel _jobModel;
        public List<ISegmentModel> SegmentsToCopy { get; set; }
        public int _selectedIndex;

        public PasteSegmentsCommand(JobModel jobModel)
        {
            _jobModel = jobModel;
            
            SegmentsToCopy = new List<ISegmentModel>(_jobModel.SegmentsToCopy);
            // _selectedIndex = _jobModel.GroupingSegments.OrderBy(x => x.SegmentIndex).ToList().FindIndex(x => x.IsSelected);
            _selectedIndex = _jobModel.IndexToPasteCopySegments;

        }

        public void Execute()
        {
            if (SegmentsToCopy.Count == 0)
            {
                return;
            }
          //  SegmentsToCopy.ForEach(x => x.RaiseSegmentBrushChanged());
            
            if (_selectedIndex == -1 || _selectedIndex == (_jobModel.GroupingSegments.Count) - 1)
            {
                foreach (var newSegmentModel in SegmentsToCopy)
                {
                    if(newSegmentModel is SegmentModel innerSegment)
                    {
                        _jobModel.GroupingSegments.Add(innerSegment);
                        _jobModel.Segments.Add(innerSegment);
                    }
                    else if(newSegmentModel is SegmentsGroupModel group)
                    {
                        _jobModel.GroupingSegments.Add(group);
                        _jobModel.SegmentsGroups.Add(group);
                        foreach (var segment in group.Segments)
                        {
                            _jobModel.Segments.Add(segment);
                        }
                    }
                }
            }
            else
            {
                int selctedIndex = _selectedIndex;
                foreach (var newSegmentModel in SegmentsToCopy)
                {
                    selctedIndex++;
                    if (newSegmentModel is SegmentModel innerSegment)
                    {
                        _jobModel.GroupingSegments.Insert(selctedIndex, innerSegment);
                        _jobModel.Segments.Add(innerSegment);
                    }
                    else if (newSegmentModel is SegmentsGroupModel group)
                    {
                        _jobModel.GroupingSegments.Insert(selctedIndex, group);
                        _jobModel.SegmentsGroups.Add(group);
                        foreach (var segment in group.Segments)
                        {
                            _jobModel.Segments.Add(segment);
                        }
                    }
                }
            }
            _jobModel.GroupingSegments.ToList().ForEach(x => x.IsSelected = false);
            
            _jobModel.ArrangeSegmentsIndixes();
            _jobModel.SegmentsToCopy.Clear();
        }

        public void UnExecute()
        {
            foreach (var segment in SegmentsToCopy)
            {
                _jobModel.GroupingSegments.Remove(segment);
                if (segment is SegmentModel innerSegment)
                {
                    _jobModel.Segments.Remove(innerSegment);
                }
                else if (segment is SegmentsGroupModel group)
                {
                    _jobModel.SegmentsGroups.Remove(group);
                    foreach (var insegment in group.Segments)
                    {
                        _jobModel.Segments.Remove(insegment);
                    }
                }
            }
            _jobModel.ArrangeSegmentsIndixes();
             _jobModel.SegmentsToCopy = new List<ISegmentModel>(SegmentsToCopy);
        }
    }
}