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 enum OffsetType{ Left, Middle, Right};

    public class ChangeOffsetCommand : IUndoRedoCommand
    {
        private SegmentModel _segment;
        private double _oldValue;
        private double _newValue;
        private OffsetType _type;

        public ChangeOffsetCommand(SegmentModel segment, double oldvalue, double newValue, OffsetType type)
        {
            _segment = segment;
            _oldValue = oldvalue;
            _newValue = newValue;
            _type = type;
        }
        public void Execute()
        {
            if (_segment == null)
                return;

            switch (_type)
            {
                case OffsetType.Left:
                    {
                        _segment.LeftOffset = _newValue;
                        break;
                    }
                case OffsetType.Middle:
                    {
                        _segment.MiddleOffset = _newValue;
                        break;
                    }
                case OffsetType.Right:
                    {
                        _segment.RightOffset = _newValue;
                        break;
                    }
                default: break;

            }
        }

        public void UnExecute()
        {
            if (_segment == null)
                return;

            switch (_type)
            {
                case OffsetType.Left:
                    {
                        _segment.LeftOffset = _oldValue;
                        break;
                    }
                case OffsetType.Middle:
                    {
                        _segment.MiddleOffset = _oldValue;
                        break;
                    }
                case OffsetType.Right:
                    {
                        _segment.RightOffset = _oldValue;
                        break;
                    }
                default: break;
                    
            }
        }
    }
}