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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.Segments.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);
}
}
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);
}
}
}
}
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