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 ReverseCommand : IUndoRedoCommand
    {
        private JobModel _jobModel;
        private List<int> _indexes;

        public ReverseCommand(JobModel job)
        {
            _jobModel = job;
            _indexes = _jobModel.GroupingSegments.Select((segm, ind) => new { Index = ind, Segment = segm }).Where( x=>x.Segment.IsSelected ).Select(t=> t.Index).ToList();
        }

        public void Execute()
        {
            if (_indexes.Count == 0)
                return;

            //for (int index = 0, endIndex = _indexes.Count -1; index < _indexes.Count && index < endIndex; index++, endIndex--)
            //{
            //    int firstIndexToSwap = _indexes[index];
            //    int lastIndexToSwap = _indexes[endIndex];
               
            //     _jobModel.SwapSegments(firstIndexToSwap, lastIndexToSwap);
            //}
            for (int index = 0; index < _indexes.Count && index < _jobModel.GroupingSegments.Count; index++)
            {
                if(_jobModel.GroupingSegments[_indexes[index]] is SegmentModel segmentModel)
                {
                    if(segmentModel.IsGradient)
                    {
                        segmentModel.SwapBrushStops();
                    }
                }
                else if(_jobModel.GroupingSegments[_indexes[index]] is SegmentsGroupModel group)
                {
                    foreach( var segment in group.Segments)
                    {
                        if (segment.IsGradient)
                        {
                            segment.SwapBrushStops();
                        }
                    }
                }
            }
            _jobModel.GroupingSegments.ToList().ForEach(x => x.IsSelected = false);
            _jobModel.ArrangeSegmentsIndixes();
        }

        public void UnExecute()
        {
            if (_indexes.Count == 0)
                return;

            //for (int index = 0, endIndex = _indexes.Count - 1; index < _indexes.Count && index < endIndex; index++, endIndex--)
            //{
            //    int firstIndexToSwap = _indexes[index];
            //    int lastIndexToSwap = _indexes[endIndex];

            //    _jobModel.SwapSegments(firstIndexToSwap, lastIndexToSwap);
            //}
            for (int index = 0; index < _indexes.Count && index < _jobModel.GroupingSegments.Count; index++)
            {
                if (_jobModel.GroupingSegments[_indexes[index]] is SegmentModel segmentModel)
                {
                    if (segmentModel.IsGradient)
                    {
                        segmentModel.SwapBrushStops();
                    }
                }
                else if (_jobModel.GroupingSegments[_indexes[index]] is SegmentsGroupModel group)
                {
                    foreach (var segment in group.Segments)
                    {
                        if (segment.IsGradient)
                        {
                            segment.SwapBrushStops();
                        }
                    }
                }
            }
            _jobModel.ArrangeSegmentsIndixes();
        }
    }
}