using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.Windows.Input;
using System.Threading.Tasks;
using MarketData;
using MarketData.Utils;
using MarketData.MarketDataModel;
using MarketData.Generator;
using MarketData.DataAccess;
using TradeBlotter.DataAccess;
using TradeBlotter.Model;
using TradeBlotter.Command;
using Microsoft.Research.DynamicDataDisplay.DataSources;
using TradeBlotter.Cache;

namespace TradeBlotter.ViewModels
{
  public class RSIViewModel : WorkspaceViewModel
  {
    private RSICollection rsiCollection;
    private String symbol;
    private String companyName;
    private List<String> symbols;
    private List<String> watchLists;
    private String selectedWatchList;
    private RelayCommand refreshCommand;
    private List<Int32> dayCounts;
    private List<Int32> rsiDayCounts;
    private Int32 selectedDayCount;
    private Int32 selectedRSIDayCount;
    private bool isLegendVisible = true;
    private bool busyIndicator = false;

    public RSIViewModel()
    {
      base.DisplayName = "RSIView";
      watchLists = WatchListDA.GetWatchLists();
      watchLists.Insert(0, Constants.CONST_ALL);
      selectedWatchList = watchLists.Find(x => x.Equals("Valuations"));
      symbols = WatchListDA.GetWatchList(selectedWatchList);
      rsiDayCounts=new List<Int32>();
      rsiDayCounts.Add(3);
      rsiDayCounts.Add(14);
      dayCounts = new List<Int32>();
      dayCounts.Add(30);
      dayCounts.Add(60);
      dayCounts.Add(90);
      dayCounts.Add(180);
      dayCounts.Add(360);
      dayCounts.Add(720);
      dayCounts.Add(1440);
      dayCounts.Add(3600);
      selectedDayCount = dayCounts[1];
      selectedRSIDayCount=rsiDayCounts[1];
      PropertyChanged += OnViewModelPropertyChanged;
    }
    public override SaveParameters GetSaveParameters()
    {
      SaveParameters saveParams = new SaveParameters();
      if (null == symbol) return null;
      saveParams.Add(new KeyValuePair<String, String>("Type", GetType().Namespace + "." + GetType().Name));
      saveParams.Add(new KeyValuePair<String, String>("SelectedSymbol", symbol));
      saveParams.Add(new KeyValuePair<String, String>("SelectedWatchList", selectedWatchList));
      saveParams.Add(new KeyValuePair<String, String>("SelectedDayCount", selectedDayCount.ToString()));
      saveParams.Add(new KeyValuePair<String, String>("SelectedRSIDayCount", selectedRSIDayCount.ToString()));
      saveParams.Add(new KeyValuePair<String, String>("IsLegendVisible", isLegendVisible.ToString()));
      return saveParams;
    }
    public override void SetSaveParameters(SaveParameters saveParameters)
    {
      try
      {
        symbol = (from KeyValuePair<String, String> item in saveParameters where item.Key.Equals("SelectedSymbol") select item).FirstOrDefault().Value;
        selectedWatchList = (from KeyValuePair<String, String> item in saveParameters where item.Key.Equals("SelectedWatchList") select item).FirstOrDefault().Value;
        base.OnPropertyChanged("SelectedWatchList");
        selectedDayCount = Int32.Parse((from KeyValuePair<String, String> item in saveParameters where item.Key.Equals("SelectedDayCount") select item).FirstOrDefault().Value);
        selectedRSIDayCount = Int32.Parse((from KeyValuePair<String, String> item in saveParameters where item.Key.Equals("SelectedRSIDayCount") select item).FirstOrDefault().Value);
        try { isLegendVisible = Boolean.Parse((from KeyValuePair<String, String> item in saveParameters where item.Key.Equals("IsLegendVisible") select item).FirstOrDefault().Value); }
        catch (Exception) { ;}
        Referer=saveParameters.Referer;
        base.OnPropertyChanged("SelectedSymbol");
      }
      catch (Exception exception)
      {
        MDTrace.WriteLine(LogLevel.DEBUG,String.Format("Exception:{0}",exception.ToString()));
      }
    }
    public override bool CanPersist()
    {
      return true;
    }
    public bool BusyIndicator
    {
      get { return busyIndicator; }
      set { busyIndicator = value; base.OnPropertyChanged("BusyIndicator"); }
    }
    private void OnViewModelPropertyChanged(object sender, PropertyChangedEventArgs eventArgs)
    {
      if (eventArgs.PropertyName.Equals("SelectedSymbol")||((eventArgs.PropertyName.Equals("SelectedRSIDayCount")||eventArgs.PropertyName.Equals("SelectedDayCount"))&&null!=symbol))
      {
        BusyIndicator = true;
        Task workerTask = Task.Factory.StartNew(() =>
        {
          base.DisplayName = "RSI("+symbol+")";
          base.OnPropertyChanged("DisplayName");
          rsiCollection=RSIGenerator.GenerateRSI(SelectedSymbol,selectedDayCount,selectedRSIDayCount);
          companyName = PricingDA.GetNameForSymbol(symbol);
        });
        workerTask.ContinueWith((continuation) =>
        {
          BusyIndicator = false;
          base.OnPropertyChanged("Pcnt");
          base.OnPropertyChanged("Title");
          base.OnPropertyChanged("LegendVisible");
        });
      }
      else if (eventArgs.PropertyName.Equals("SelectedWatchList"))
      {
//        if (selectedWatchList.Equals(Constants.CONST_ALL)) symbols = PricingDA.GetSymbols();
        if (selectedWatchList.Equals(Constants.CONST_ALL)) symbols = SymbolCache.GetInstance().GetSymbols();
        else symbols = WatchListDA.GetWatchList(selectedWatchList);
        base.OnPropertyChanged("Symbols");
      }
    }
    public CompositeDataSource Pcnt
    {
      get
      {
        CompositeDataSource compositeDataSource = RSIModel.Pcnt(rsiCollection);
        return compositeDataSource;
      }
    }
    public override String Title
    {
      get
      {
        if (null == companyName || null == rsiCollection || 0 == rsiCollection.Count) return "";
        DateTime latestPricingDate=PricingDA.GetLatestDate(SelectedSymbol);
        StringBuilder sb=new StringBuilder();
        sb.Append(companyName).Append(" (").Append(symbol).Append(") ").Append(Utility.DateTimeToStringMMHDDHYYYY(latestPricingDate));
        sb.Append(" (").Append(Utility.FormatNumber(rsiCollection[rsiCollection.Count-1].RSI,2)).Append("%)");
        if(rsiCollection.Count<=1)return sb.ToString();
        double changePercent=(rsiCollection[rsiCollection.Count-1].RSI-rsiCollection[rsiCollection.Count-2].RSI)/rsiCollection[rsiCollection.Count-1].RSI;
        sb.Append(String.Format(" ({0}{1})",changePercent>=0.00?"+":"",Utility.FormatPercent(changePercent)));
        return sb.ToString();
      }
    }
    public Boolean Visibility
    {
      get { return false; }
    }
    public Boolean CheckBoxLegendVisible
    {
      get
      {
        return isLegendVisible;
      }
      set
      {
        isLegendVisible = value;
        base.OnPropertyChanged("CheckBoxLegendVisible");
        base.OnPropertyChanged("LegendVisible");
      }
    }
    public String LegendVisible
    {
      get
      {
        if (isLegendVisible) return "true";
        return "false";
      }
      set
      {
        isLegendVisible = Boolean.Parse(value);
        base.OnPropertyChanged("LegendVisible");
      }
    }
    public List<Int32> DayCounts
    {
      get { return dayCounts; }
    }
    public Int32 SelectedDayCount
    {
      get { return selectedDayCount; }
      set { selectedDayCount = value; base.OnPropertyChanged("SelectedDayCount"); }
    }


    public List<Int32> RSIDayCounts
    {
      get { return rsiDayCounts; }
    }
    public Int32 SelectedRSIDayCount
    {
      get { return selectedRSIDayCount; }
      set { selectedRSIDayCount = value; base.OnPropertyChanged("SelectedRSIDayCount"); }
    }


    public List<String> Symbols
    {
      get
      {
        return symbols;
      }
    }
    public String SelectedSymbol
    {
      get { return symbol; }
      set
      {
        if (value == symbol || String.IsNullOrEmpty(value)) return;
        symbol = value;
        base.OnPropertyChanged("SelectedSymbol");
      }
    }
    public List<String> WatchListNames
    {
      get
      {
        return watchLists;
      }
      set { ;}
    }
    public String SelectedWatchList
    {
      get { return selectedWatchList; }
      set { selectedWatchList = value; base.OnPropertyChanged("SelectedWatchList"); }
    }
    private void Refresh()
    {
      base.OnPropertyChanged("SelectedSymbol");
    }
    private Boolean CanRefresh
    {
      get { return true; }
    }
    public ICommand RefreshCommand
    {
      get
      {
        if (null == refreshCommand) refreshCommand = new RelayCommand(param => Refresh(), param => CanRefresh);
        return refreshCommand;
      }
    }
  }
}