using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Input;
using Aitex.UI.Charting.ViewModel;
using System.Windows;
using Aitex.UI.Charting.Model;
using Abt.Controls.SciChart;

using Abt.Controls.SciChart.Model.DataSeries;
using DataAnalysisControl.Core;

namespace Aitex.UI.Charting.Command
{
    public class ChangeFactorOffsetCommand : ICommand
    {
        public ChangeFactorOffsetCommand(string uniqueDataId, double newFactor, double newOffset)
        {
            _newFactor = (float)newFactor;
            _newOffset = (float)newOffset;
            _uniqueDataId = uniqueDataId;
        }
        string _uniqueDataId = "";
        float _newFactor = 1;
        float _newOffset = 0;

        public bool CanExecute(object parameter)
        {
            return true;
        }

#pragma warning disable 0067
        public event EventHandler CanExecuteChanged;
#pragma warning restore 0067
        private void AsyncShowWarningMessageBox(string message, string title)
        {
            Application.Current.Dispatcher.BeginInvoke(new Action(() => MessageBox.Show(message, title, MessageBoxButton.OK, MessageBoxImage.Warning)));
        }

        public void Execute(object parameter)
        {
            string reason = string.Empty;
            try
            {
                var commonViewModel = (CommonViewModel)parameter;

                var myLine = commonViewModel.GetDataLineSeries(_uniqueDataId);
                if (myLine == null)
                {
                    reason = string.Format("数据名称{0}不存在", _uniqueDataId);
                    AsyncShowWarningMessageBox(reason, "警告");
                }
                else
                {
                    var dataList = new List<float>();
                    var timeList = new List<DateTime>();
                    for (int i = 0; i < myLine.Points.RawData.Count; i++)
                    {
                        dataList.Add(myLine.Points.RawData[i] * _newFactor + _newOffset);
                        timeList.Add(myLine.Points.TimeStamp[i] + myLine.DataSource.TimeMove);
                    }
                    var dataSet = myLine.DataSeries as XyDataSeries<DateTime, float>;
                    if (dataSet != null && dataList.Count > 0)
                    {
                        dataSet.Clear();
                        dataSet.Append(timeList, dataList);
                    }
                    commonViewModel.InvokePropertyChanged();
                }
            }
            catch (Exception ex)
            {
                reason = ex.Message;
                CONTEXT.WriteLog(ex, string.Format("改变数据{0}的缩放因子及偏差值发生异常", _uniqueDataId));
                AsyncShowWarningMessageBox(reason, "警告");
            }
        }
    }
}