#include "ToggleButton.h"

namespace serum
{

ToggleButton::ToggleButton (const juce::String& lbl) : label (lbl)
{
    setRepaintsOnMouseActivity (true);
}

void ToggleButton::attach (juce::AudioProcessorValueTreeState& apvts, const juce::String& paramId)
{
    attachment.reset();
    if (auto* param = apvts.getParameter (paramId))
    {
        attachment = std::make_unique<juce::ParameterAttachment> (*param,
            [this] (float newValue) { setToggleState (newValue > 0.5f); });
        attachment->sendInitialUpdate();
    }
}

void ToggleButton::setToggleState (bool s)
{
    if (state == s)
        return;
    state = s;
    repaint();
}

void ToggleButton::paint (juce::Graphics& g)
{
    const auto bounds = getLocalBounds().toFloat();
    const float ledSize = juce::jmin (bounds.getHeight() - 16.0f, 16.0f);
    const juce::Rectangle<float> led ((bounds.getWidth() - ledSize) * 0.5f, 4.0f, ledSize, ledSize);

    const bool live = isEnabled();
    const bool hovered = live && isMouseOverOrDragging();

    if (state)
    {
        // Hover brightens the halo, disabled dims it, so the three states are
        // distinguishable without relying on colour alone.
        const float halo = live ? (hovered ? 0.55f : 0.35f) : 0.15f;
        g.setColour (onColour.withAlpha (halo));
        g.fillEllipse (led.expanded (6.0f));
        g.setColour (live ? onColour : onColour.withAlpha (0.4f));
    }
    else
    {
        g.setColour (hovered ? theme::textDim : theme::outline);
    }
    g.fillEllipse (led);
    g.setColour (state ? juce::Colours::black : theme::textDim);
    g.drawEllipse (led, live ? (hovered ? 1.6f : 1.0f) : 0.8f);

    const auto labelColour = ! live ? theme::outline
                                    : (state ? theme::text : (hovered ? theme::text : theme::textDim));
    g.setColour (labelColour);
    g.setFont (juce::Font (11.0f));
    g.drawText (label, 0, (int) (led.getBottom() + 2), getWidth(), 14, juce::Justification::centred, false);
}

void ToggleButton::mouseDown (const juce::MouseEvent&)
{
    const bool newState = ! state;

    if (onClick)
    {
        onClick (newState);
    }
    else if (attachment != nullptr)
    {
        attachment->setValueAsCompleteGesture (newState ? 1.0f : 0.0f);
    }

    setToggleState (newState);
}

} // namespace serum