#include "WaveformDisplay.h"

namespace serum
{

void WaveformDisplay::paint (juce::Graphics& g)
{
    const auto b = getLocalBounds().toFloat();
    g.setColour (juce::Colours::black.withAlpha (0.4f));
    g.fillRoundedRectangle (b, 4.0f);
    g.setColour (theme::outline);
    g.drawRoundedRectangle (b.reduced (0.5f), 4.0f, 1.0f);

    const float midY = b.getCentreY();
    g.setColour (theme::outline);
    g.drawLine (b.getX() + 4.0f, midY, b.getRight() - 4.0f, midY, 1.0f);

    if (wtLib == nullptr || ! enabled)
        return;

    const Wavetable& wt = wtLib->getTable (wave);
    if (! wt.isValid())
        return;

    const int n = 512;
    juce::Path path;
    path.startNewSubPath (b.getX() + 4.0f, midY);

    for (int i = 0; i <= n; ++i)
    {
        const float phase = (float) i / (float) n;
        const float sample = wt.readSafe (wtPos * 255.0f, phase);
        const float x = b.getX() + 4.0f + ((float) i / (float) n) * (b.getWidth() - 8.0f);
        const float y = midY - sample * (b.getHeight() * 0.42f);
        if (i == 0)
            path.startNewSubPath (x, y);
        else
            path.lineTo (x, y);
    }

    g.setColour (theme::accent);
    g.strokePath (path, juce::PathStrokeType (1.5f));
}

} // namespace serum