/*
 * Copyright (c) 2017, 7u83 <7u83@mail.ru>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package chart;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import sesim.MinMax;
import sesim.OHLCData;
import sesim.OHLCDataItem;
import static sun.awt.geom.Curve.prev;

/**
 *
 * @author 7u83 <7u83@mail.ru>
 */
public abstract class OHLCChartPainter extends ChartPainter {

    protected float iwidth;
    private MinMax mm;
    private Dimension dim;
    private float y_scaling;

    float getY(float y) {
//c_yscaling = ctx.rect.height / c_mm.getDiff();
//               float ys = dim.height / mm.getDiff();
        if (mm.isLog()) {
//            return rect.height + rect.y - ((float) Math.log(y) - c_mm.getMin()) * ys;
        }
        return (dim.height - ((y - mm.getMin()) * y_scaling));

    }

    abstract void drawItem(Graphics2D g, int prevx, int x, OHLCDataItem prev, OHLCDataItem i);
    


    @Override
    public void drawChart(Graphics2D g, ChartPanel p, ChartDef def) {
        OHLCData data = getData();
        if (data==null)
            return;
        
        init(g);

        iwidth = (float) ((def.x_unit_width * em_size) * 0.9f);

        int first_bar = getFirstBar(p); 
        
        
        dim = p.getSize();
        int bars = (int) (dim.width / (def.x_unit_width * em_size));

        int last_bar = first_bar + bars+1;

        mm = data.getMinMax(first_bar, last_bar);

        y_scaling = dim.height / mm.getDiff();

        OHLCDataItem prevd = null;
        int prevx;

System.out.printf("Firstbar %d - %d",first_bar,last_bar);        
        
        if (data.size() > 0 && first_bar < data.size()) {
            prevd = data.get(first_bar);
        }
        
 

        for (int b = first_bar, n = 0; b < last_bar && b < data.size(); b++, n++) {
            OHLCDataItem d = data.get(b);

            int x = (int) (n * em_size * def.x_unit_width); //em_width;
            drawItem(g, (int) (x - em_size * def.x_unit_width), x, prevd, d);
            prevd = d;

            //this.drawCandleItem(g, (int)((n-1)*def.x_unit_width*em_size), (int)(n*def.x_unit_width*em_size), prevd, d);
        }
    }

}