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import jm.audio.io.SampleOut;
import jm.audio.synth.Envelope;
import jm.audio.synth.Pluck;
import jm.audio.synth.StereoPan;
import jm.audio.synth.Volume;

public final class PluckInst extends jm.audio.Instrument {
    /**
     * The number of channels
     */
    private int channels;
    /**
     * the sample rate passed to the instrument
     */
    private int sampleRate;
    /**
     * The amount of sustein in the pluck algorithm
     */
    private double feedback;

    /**
     * A constructor to set an initial sampling rate
     */
    public PluckInst(int sampleRate) {
        this(sampleRate, 2);
    }

    /**
     * A constructor to set an initial sampling rate andchannels
     */
    public PluckInst(int sampleRate, int channels) {
        this(sampleRate, channels, RENDER);
    }

    /**
     * A constructor to set a sampling rate, channels, and real-time/render output
     */
    public PluckInst(int sampleRate, int channels, int output) {
        this(sampleRate, channels, output, 0.5);
    }

    /**
     * A constructor to set sampling rate, channels, real-time/render output and feedback.
     */
    public PluckInst(int sampleRate, int channels, int output, double feedback) {
        this.sampleRate = sampleRate;
        this.channels = channels;
        this.output = output;
        this.feedback = feedback;
    }

    /**
     * Initialisation method used to build the objects that this instrument uses.
     */
    public void createChain() {
        Pluck plk = new Pluck(this, this.sampleRate, this.channels, this.feedback);
        Volume vol = new Volume(plk);
        StereoPan span = new StereoPan(vol);
        Envelope env = new Envelope(span, new double[]{0.0, 1.0, 0.9, 1.0, 1.0, 0.0});
        SampleOut sout;
        if (output == RENDER) sout = new SampleOut(env);
    }

    public void actionEvent(Object obj, int intValue) {
        // add real time changes here as required
    }
}