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/*
  The MIT License (MIT)

  Copyright (c) 2014-2017 Marc de Verdelhan & respective authors (see AUTHORS)

  Permission is hereby granted, free of charge, to any person obtaining a copy of
  this software and associated documentation files (the "Software"), to deal in
  the Software without restriction, including without limitation the rights to
  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
  the Software, and to permit persons to whom the Software is furnished to do so,
  subject to the following conditions:

  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package ta4jexamples.indicators;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.time.Day;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
import org.ta4j.core.Bar;
import org.ta4j.core.Decimal;
import org.ta4j.core.Indicator;
import org.ta4j.core.TimeSeries;
import org.ta4j.core.indicators.EMAIndicator;
import org.ta4j.core.indicators.bollinger.BollingerBandsLowerIndicator;
import org.ta4j.core.indicators.bollinger.BollingerBandsMiddleIndicator;
import org.ta4j.core.indicators.bollinger.BollingerBandsUpperIndicator;
import org.ta4j.core.indicators.helpers.ClosePriceIndicator;
import org.ta4j.core.indicators.statistics.StandardDeviationIndicator;
import ta4jexamples.loaders.CsvBarsLoader;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * This class builds a graphical chart showing values from indicators.
 */
public class IndicatorsToChart {

    /**
     * Builds a JFreeChart time series from a Ta4j time series and an indicator.
     * @param barseries the ta4j time series
     * @param indicator the indicator
     * @param name the name of the chart time series
     * @return the JFreeChart time series
     */
    private static org.jfree.data.time.TimeSeries buildChartTimeSeries(TimeSeries barseries, Indicator indicator, String name) {
        org.jfree.data.time.TimeSeries chartTimeSeries = new org.jfree.data.time.TimeSeries(name);
        for (int i = 0; i < barseries.getBarCount(); i++) {
            Bar bar = barseries.getBar(i);
            chartTimeSeries.add(new Day(Date.from(bar.getEndTime().toInstant())), indicator.getValue(i).doubleValue());
        }
        return chartTimeSeries;
    }

    /**
     * Displays a chart in a frame.
     * @param chart the chart to be displayed
     */
    private static void displayChart(JFreeChart chart) {
        // Chart panel
        ChartPanel panel = new ChartPanel(chart);
        panel.setFillZoomRectangle(true);
        panel.setMouseWheelEnabled(true);
        panel.setPreferredSize(new java.awt.Dimension(500, 270));
        // Application frame
        ApplicationFrame frame = new ApplicationFrame("Ta4j example - Indicators to chart");
        frame.setContentPane(panel);
        frame.pack();
        RefineryUtilities.centerFrameOnScreen(frame);
        frame.setVisible(true);
    }

    public static void main(String[] args) {

        /*
          Getting time series
         */
        TimeSeries series = CsvBarsLoader.loadAppleIncSeries();

        /*
          Creating indicators
         */
        // Close price
        ClosePriceIndicator closePrice = new ClosePriceIndicator(series);
        EMAIndicator avg14 = new EMAIndicator(closePrice, 14);
        StandardDeviationIndicator sd14 = new StandardDeviationIndicator(closePrice, 14);

        // Bollinger bands
        BollingerBandsMiddleIndicator middleBBand = new BollingerBandsMiddleIndicator(avg14);
        BollingerBandsLowerIndicator lowBBand = new BollingerBandsLowerIndicator(middleBBand, sd14);
        BollingerBandsUpperIndicator upBBand = new BollingerBandsUpperIndicator(middleBBand, sd14);

        /*
          Building chart dataset
         */
        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(buildChartTimeSeries(series, closePrice, "Apple Inc. (AAPL) - NASDAQ GS"));
        dataset.addSeries(buildChartTimeSeries(series, lowBBand, "Low Bollinger Band"));
        dataset.addSeries(buildChartTimeSeries(series, upBBand, "High Bollinger Band"));

        /*
          Creating the chart
         */
        JFreeChart chart = ChartFactory.createTimeSeriesChart(
                "Apple Inc. 2013 Close Prices", // title
                "Date", // x-axis label
                "Price Per Unit", // y-axis label
                dataset, // data
                true, // create legend?
                true, // generate tooltips?
                false // generate URLs?
                );
        XYPlot plot = (XYPlot) chart.getPlot();
        DateAxis axis = (DateAxis) plot.getDomainAxis();
        axis.setDateFormatOverride(new SimpleDateFormat("yyyy-MM-dd"));

        /*
          Displaying the chart
         */
        displayChart(chart);
    }

}