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

class MainContentComponent : public AudioAppComponent {
public:
    MainContentComponent() {
        setSize(800, 600);
        setAudioChannels(2, 2);
        random = Random();
        levelSlider.setRange (0.0, 0.25);
        levelSlider.setTextBoxStyle (Slider::TextBoxRight, false, 100, 20);
        levelLabel.setText ("Level", dontSendNotification);
        
        addAndMakeVisible (levelSlider);
        addAndMakeVisible (levelLabel);
    }

    ~MainContentComponent() {
        shutdownAudio();
    }

    void prepareToPlay (int samplesPerBlockExpected, double sampleRate) override {}

    void getNextAudioBlock (const AudioSourceChannelInfo& buf) override {
        const float l = levelSlider.getValue();
        const float ls = l * 2.0f;
        
        for (int c = 0; c < buf.buffer->getNumChannels(); ++c) {
            float* const b = buf.buffer->getWritePointer(c, buf.startSample);
            
            for (int s = 0; s < buf.numSamples; ++s) b[s] = random.nextFloat() * ls * 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(); }