unit MainForm;

interface

uses
    System.SysUtils,
    System.Types,
    System.UITypes,
    System.Classes,
    System.Variants,
    System.DateUtils,
    System.Generics.Collections,
    FMX.Types,
    FMX.Controls,
    FMX.Forms,
    FMX.Graphics,
    FMX.Dialogs,
    FMX.Controls.Presentation,
    FMX.StdCtrls,
    FMX.ListView.Types,
    FMX.ListView.Appearances,
    FMX.ListView.Adapters.Base,
    FMX.ListView,
    FMX.Memo.Types,
    FMX.ScrollBox,
    FMX.Memo,
    FMX.Objects,
    Myc.Futures,
    Myc.Trade.DataStream,
    Myc.Trade.DataPoint,
    Myc.Trade.DataProvider,
    Myc.Signals,
    Myc.Lazy,
    Myc.Signals.FMX,
    Myc.TaskManager,
    FMX.ListBox,
    FMX.Layouts,
    FMX.MultiView,
    FMX.TreeView;

type
    TForm1 = class(TForm)
        LogMemo: TMemo;
        Panel1: TPanel;
        Layout: TFlowLayout;
        SymbolsComboBox: TComboBox;
        RandomBox: TCheckBox;
        LoadButton: TButton;
        RandomButton: TButton;
        ChartButton: TButton;
        StopButton: TButton;
        TreeView1: TTreeView;
        Splitter1: TSplitter;
        procedure RandomButtonClick(Sender: TObject);
        procedure FormCreate(Sender: TObject);
        procedure FormDestroy(Sender: TObject);
        procedure LoadButtonClick(Sender: TObject);
        procedure ChartButtonClick(Sender: TObject);
        procedure StopButtonClick(Sender: TObject);
        procedure LayoutResized(Sender: TObject);
    private
        const
            cnt = 20;
        type
            TRndItem = record
                Stream: IDataStream<TAskBidItem>;
                Data: TMutable<TDataSeries<TAskBidItem>>;
                Labl: TLabel;
            end;
    private
        FOnEvent: TNotifyEvent;
        { Private declarations }
        FServer: IDataServer<TAskBidItem>;
        FSymbols: TFuture<TArray<String>>;
        FRandom: TList<TRndItem>;
        FTerminate: TEvent;
        FLoadDone: TState;
        function SelectedSymbol: String;
        function SelectedStream: IDataStream<TAskBidItem>;
    public
    { Public declarations }
    published
        property OnEvent: TNotifyEvent read FOnEvent write FOnEvent;
    end;

var
    Form1: TForm1;

implementation

{$R *.fmx}

procedure TForm1.StopButtonClick(Sender: TObject);
begin
    FTerminate.Notify;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
    FTerminate := TEvent.CreateEvent;
    FRandom := TList<TRndItem>.Create;

    // Create an instance of the TAuraTABFileServer. The server can be reused for multiple stream creations. [364]
    FServer := TAuraTABFileServer.Create('\\COFFEE\TickData\Pepperstone');

    SymbolsComboBox.Enabled := false;
    ChartButton.Enabled := false;
    LoadButton.Enabled := false;

    FSymbols := FServer.EnumerateSymbols;

    SymbolsComboBox.ProcessSignal(
        FSymbols.Done.Signal,
        procedure
        begin
            SymbolsComboBox.BeginUpdate;
            try
                SymbolsComboBox.Items.Clear;
                SymbolsComboBox.Items.AddStrings(FSymbols.WaitFor);
                if SymbolsComboBox.Items.Count > 0 then
                begin
                    if SymbolsComboBox.ItemIndex < 0 then
                        SymbolsComboBox.ItemIndex := SymbolsComboBox.Items.IndexOf('GER40');
                    SymbolsComboBox.Enabled := true;
                    ChartButton.Enabled := true;
                    LoadButton.Enabled := true;
                end;
            finally
                SymbolsComboBox.EndUpdate;
            end;
        end
    );
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
    FSymbols.WaitFor;
    FTerminate.Notify;
    TaskManager.WaitFor(FLoadDone);
    FRandom.Free;
end;

procedure TForm1.LayoutResized(Sender: TObject);
begin
    LogMemo.Lines.Add('resize');
end;

procedure TForm1.LoadButtonClick(Sender: TObject);
begin
    if SymbolsComboBox.ItemIndex < 0 then
        exit;

    var Stream := FServer.CreateStream(FSymbols.WaitFor[SymbolsComboBox.ItemIndex]);
    var Data := TDataStreamProvider.Create<TAskBidItem>(30000, 10000, Stream);

    var path := TPath.Create(Self);
    path.Parent := Layout;
    path.Align := TAlignLayout.None;

    path.ProcessSignal(
        Data.Changed,
        procedure
        begin
            var Prices := Data.Value;

            if Prices.Count > 0 then
            begin
                path.BeginUpdate;
                try
                    path.Data.Clear;
                    path.Data.MoveTo(PointF(path.Width - 1, Prices[0].Data.Ask));
                    for var i := 1 to Prices.Count - 1 do
                        path.Data.LineTo(PointF(path.Width - i - 1, Prices[i].Data.Ask));
                finally
                    path.EndUpdate;
                end;
            end;
        end
    );
end;

procedure TForm1.RandomButtonClick(Sender: TObject);
begin
    var rnd: TRndItem;

    rnd.Stream := FServer.CreateStream(FSymbols.WaitFor[Random(Length(FSymbols.WaitFor))]);
    rnd.Data := TDataStreamProvider.Create<TAskBidItem>(3000, 1000, rnd.Stream);

    rnd.Labl := TLabel.Create(Self);
    rnd.Labl.Parent := Layout;
    rnd.Labl.Align := TAlignLayout.None;
    rnd.Labl.WordWrap := false;
    rnd.Labl.Width := 300;
    rnd.Labl.Text := rnd.Stream.Symbol + ' loading...';
    FRandom.Add(rnd);

    var Proc :=
        procedure(idx: Integer)
        begin
            FRandom[idx]
                .Labl
                .ProcessSignal(
                    FRandom[idx].Data.Changed,
                    procedure
                    begin
                        var data := FRandom[idx].Data.Value;
                        if data.Count > 0 then
                        begin
                            var dp := data[0];
                            FRandom[idx].Labl.Text :=
                                FRandom[idx].Stream.Symbol
                                    + ' '
                                    + dp.Time.ToString
                                    + ' '
                                    + data.TotalCount.ToString
                                    + '  '
                                    + dp.Data.Ask.ToString;
                        end;
                    end);
        end;
    Proc(FRandom.Count - 1);
end;

procedure TForm1.ChartButtonClick(Sender: TObject);
begin
    var Symbol := SelectedSymbol;
    if Symbol = '' then
        exit;

    var currPathData := TWriteable<IObjectRef<TPathData>>.CreateWriteable.Protect;
    var currLog := TWriteable<String>.CreateWriteable.Protect;

    const width = 300;

    var done :=
        TaskManager.RunTask(
            nil,
            function: TState
            begin
                var Prices := TDataSeries<TAskBidItem>.CreateWriteable(width);
                Result :=
                    FServer.ProcessData(
                        Symbol,
                        FTerminate.Signal,
                        procedure(const Values: TArray<TDataPoint<TAskBidItem>>; const Terminated: TState)
                        begin
                            Prices.Add(Values);
                            currLog.Value := Prices.TotalCount.ToString;

                            var PathData := TPathData.Create;
                            if Prices.Count > 0 then
                            begin
                                var n := Prices.Count;
                                PathData.MoveTo(PointF(n - 1, Prices[0].Data.Ask));
                                for var i := 1 to n - 1 do
                                    PathData.LineTo(PointF(n - i - 1, Prices[i].Data.Ask));

                                for var i := n - 1 downto 0 do
                                    PathData.LineTo(PointF(n - i - 1, Prices[i].Data.Bid));
                            end;
                            PathData.ClosePath;

                            currPathData.Value := TObjectRef<TPathData>.Create(PathData);
                        end
                    );
            end
        );

    FLoadDone := TState.All([FLoadDone, done]);

    var path := TPath.Create(Self);
    path.Parent := Layout;
    path.Align := TAlignLayout.None;

    path.ProcessSignal(
        currPathData.Changed,
        procedure(out IsDone: Boolean)
        begin
            if currPathData.Value <> nil then
                path.Data.Assign(currPathData.Value.Obj);
            IsDone := done.IsSet;
        end
    );
end;

function TForm1.SelectedStream: IDataStream<TAskBidItem>;
begin
    var sym := SelectedSymbol;
    if sym = '' then
        exit(nil);
    Result := FServer.CreateStream(sym);
end;

function TForm1.SelectedSymbol: String;
begin
    Result := '';
    if RandomBox.IsChecked then
        Result := FSymbols.WaitFor[Random(Length(FSymbols.WaitFor))]
    else if SymbolsComboBox.ItemIndex >= 0 then
        Result := FSymbols.WaitFor[SymbolsComboBox.ItemIndex];
end;

end.