#include "chartdir.h"

int main(int argc, char *argv[])
{
    // Use random table to generate a random series. The random table is set to 1 col
    // x 51 rows, with 9 as the seed
    RanTable *rantable = new RanTable(9, 1, 51);

    // Set the 1st column to start from 100, with changes between rows from -5 to +5
    rantable->setCol(0, 100, -5, 5);

    // Get the 1st column of the random table as the data set
    DoubleArray data = rantable->getCol(0);

    // Create a XYChart object of size 600 x 300 pixels
    XYChart *c = new XYChart(600, 300);

    // Set the plotarea at (50, 35) and of size 500 x 240 pixels. Enable both the
    // horizontal and vertical grids by setting their colors to grey (0xc0c0c0)
    c->setPlotArea(50, 35, 500, 240)->setGridColor(0xc0c0c0, 0xc0c0c0);

    // Add a title to the chart using 18 point Times Bold Itatic font.
    c->addTitle("LOWESS Generic Curve Fitting Algorithm", "timesbi.ttf", 18);

    // Set the y axis line width to 3 pixels
    c->yAxis()->setWidth(3);

    // Add a title to the x axis using 12 pts Arial Bold Italic font
    c->xAxis()->setTitle("Server Load (TPS)", "arialbi.ttf", 12);

    // Set the x axis line width to 3 pixels
    c->xAxis()->setWidth(3);

    // Set the x axis scale from 0 - 50, with major tick every 5 units and minor tick
    // every 1 unit
    c->xAxis()->setLinearScale(0, 50, 5, 1);

    // Add a blue layer to the chart
    LineLayer *layer = c->addLineLayer();

    // Add a red (0x80ff0000) data set to the chart with square symbols
    layer->addDataSet(data, 0x80ff0000)->setDataSymbol(Chart::SquareSymbol);

    // Set the line width to 2 pixels
    layer->setLineWidth(2);

    // Use lowess for curve fitting, and plot the fitted data using a spline layer
    // with line width set to 3 pixels
    c->addSplineLayer(ArrayMath(data).lowess(), 0x0000ff)->setLineWidth(3);

    // Set zero affinity to 0 to make sure the line is displayed in the most detail
    // scale
    c->yAxis()->setAutoScale(0, 0, 0);

    // Output the chart
    c->makeChart("curvefitting.png");

    //free up resources
    delete rantable;
    delete c;
    return 0;
}

