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import jm.audio.Instrument;
import jm.audio.io.SampleOut;
import jm.audio.synth.*;

/**
 * A basic additive synthesis instrument implementation
 * which implements envelope and volume control
 *
 * @author Andrew Sorensen and Andrew Brown
 */
public final class HarmonicsInst extends Instrument {
    //----------------------------------------------
    // Attributes
    //----------------------------------------------
    private static int count = 0;
    /**
     * the relative frequencies which make up this note
     */
    private float[] frequencies;
    /**
     * the volumes to use for each frequency
     */
    private float[] volumes;
    /**
     * Pan
     */
    private float pan;
    /**
     * The sample Rate to use
     */
    private int sampleRate;
    /**
     * The Oscillators to use for each frequency specified
     */
    private Oscillator[] wt;
    /**
     * The envelope to apply to each Oscillator's output
     */
    private Envelope[] env;
    /**
     * The volume to apply to each envelopes output
     */
    private Volume[] vol;
    /**
     * Stereo Pan Audio Object
     */
    private StereoPan[] span;
    private boolean header = true;
    private SampleOut sout;
    private int numberOfOvertones = 16;
    /**
     * the envelope data
     */
    private EnvPoint[] pointArray = {
            new EnvPoint((float) 0.0, (float) 0.0),
            new EnvPoint((float) 0.05, (float) 1.0),
            new EnvPoint((float) 0.15, (float) 0.4),
            new EnvPoint((float) 0.9, (float) 0.3),
            new EnvPoint((float) 1.0, (float) 0.0)
    };

    //----------------------------------------------
    // Constructor
    //----------------------------------------------

    /**
     * A simple constructor
     *
     * @param int sampleRate
     */
    public HarmonicsInst(int sampleRate) {
        //Provide some defaults
        this.sampleRate = sampleRate;
        this.frequencies = new float[numberOfOvertones];
        this.volumes = new float[numberOfOvertones];
    }

    /**
     * A constructor that allos definition of the timbral complexity
     */
    public HarmonicsInst(int sampleRate, int numbOfOvertones) {
        //Provide some defaults
        this.sampleRate = sampleRate;
        this.numberOfOvertones = numbOfOvertones;
        this.frequencies = new float[numberOfOvertones];
        this.volumes = new float[numberOfOvertones];
    }

    //----------------------------------------------
    // Methods
    //----------------------------------------------

    /**
     * Initialisation method is used to build the objects that
     * this instrument will use
     */
    public void createChain() {
        env = new Envelope[frequencies.length];
        vol = new Volume[frequencies.length];
        span = new StereoPan[frequencies.length];
        wt = new Oscillator[frequencies.length];
        for (int i = 0; i < numberOfOvertones; i++) {
            wt[i] = new Oscillator(this, Oscillator.SINE_WAVE, this.sampleRate, 2);
            wt[i].setFrqRatio((float) i + 1);
            env[i] = new Envelope(wt[i], pointArray);
            vol[i] = new Volume(env[i], (float) ((1.0 / (i + 1)) * 1.5));
            span[i] = new StereoPan(vol[i], this.pan);
        }
        //And now the add object brings us back to one path.
        Add add = new Add(span);
        SampleOut sout = new SampleOut(add);
    }
}