#include "../JuceLibraryCode/JuceHeader.h"

class MainContentComponent : public AudioAppComponent{
public:
    MainContentComponent() : random(Random()) {
        
        addAndMakeVisible(levelslider);
        addAndMakeVisible(levellabel);
        levelslider.setRange(0.0, 1.0);
        levelslider.setValue(0.5);
        levelslider.setTextBoxStyle(Slider::TextBoxRight, false, 100, 20);
        levellabel.setText("Level", dontSendNotification);
        
        setSize(800, 600);
        setAudioChannels(2, 2);
    }

    ~MainContentComponent() {
        shutdownAudio();
    }

    void prepareToPlay(int, double) override {}

    void getNextAudioBlock(const AudioSourceChannelInfo& buf) override {
        AudioIODevice* device = deviceManager.getCurrentAudioDevice();
        const BigInteger ic = device->getActiveInputChannels();
        const BigInteger oc = device->getActiveOutputChannels();
        
        const int mic = ic.getHighestBit() + 1;
        const int moc = oc.getHighestBit() + 1;
        
        const float l = (float) levelslider.getValue();
        
        for (int c = 0; c < moc; ++c) {
            if (!oc[c] || !moc) buf.buffer->clear (c, buf.startSample, buf.numSamples);
            else {
                const int ac = c % mic;
                    
                if (!ic[c]) buf.buffer->clear(c, buf.startSample, buf.numSamples);
                else {
                    const float* ib = buf.buffer->getReadPointer(ac, buf.startSample);
                    float* ob = buf.buffer->getWritePointer(c, buf.startSample);
                        
                    for (int s = 0; s < buf.numSamples; ++s) ob[s] = ib[s] * random.nextFloat() * l;
                }
            }
        }
    }

    void releaseResources() override {}

    void paint(Graphics& g) override {
        g.fillAll(getLookAndFeel().findColour (ResizableWindow::backgroundColourId));
    }

    void resized() override {
        levellabel.setBounds(10, 10, 90, 20);
        levelslider.setBounds(100, 10, getWidth() - 110, 20);
    }


private:
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MainContentComponent)
    Random random;
    Slider levelslider;
    Label levellabel;
    
};

Component* createMainContentComponent() { return new MainContentComponent(); }