#include "PluginEditor.h"
#include "BuildInfo.h"

namespace pascal
{

void MinimalLookAndFeel::drawRotarySlider (juce::Graphics& g, int x, int y, int width, int height,
                                           float sliderPos, float rotaryStartAngle, float rotaryEndAngle,
                                           juce::Slider& slider)
{
    const auto centre = juce::Point<float> (x + width * 0.5f, y + height * 0.5f);
    const auto radius = juce::jmin (width, height) * 0.5f - 7.0f;
    const auto angle = rotaryStartAngle + (rotaryEndAngle - rotaryStartAngle) * sliderPos;

    juce::Path trackPath;
    trackPath.addArc (centre.x - radius, centre.y - radius, radius * 2.0f, radius * 2.0f,
                      rotaryStartAngle, rotaryEndAngle, true);

    juce::Path fillPath;
    fillPath.addArc (centre.x - radius, centre.y - radius, radius * 2.0f, radius * 2.0f,
                     rotaryStartAngle, angle, true);

    const auto thickness = juce::jmax (1.0f, radius * 0.10f);
    juce::PathStrokeType stroke (thickness, juce::PathStrokeType::curved, juce::PathStrokeType::rounded);

    g.setColour (track);
    g.strokePath (trackPath, stroke);

    g.setColour (slider.isMouseOverOrDragging() ? juce::Colours::white : accent);
    g.strokePath (fillPath, stroke);

    const auto indicator = centre + juce::Point<float> (std::cos (angle - juce::MathConstants<float>::halfPi),
                                                        std::sin (angle - juce::MathConstants<float>::halfPi)) * radius;
    g.fillEllipse (indicator.x - 2.0f, indicator.y - 2.0f, 4.0f, 4.0f);
}

KnobComponent::KnobComponent (juce::AudioProcessorValueTreeState& apvts,
                              const juce::String& paramId,
                              const juce::String& displayName,
                              float defaultValue,
                              juce::LookAndFeel& lnf,
                              std::function<juce::String (double)> fmt)
    : format (std::move (fmt))
{
    slider.setSliderStyle (juce::Slider::RotaryVerticalDrag);
    slider.setRotaryParameters (juce::MathConstants<float>::pi * 1.25f,
                                juce::MathConstants<float>::pi * 2.75f,
                                true);
    slider.setTextBoxStyle (juce::Slider::NoTextBox, false, 0, 0);
    slider.setLookAndFeel (&lnf);
    slider.setDoubleClickReturnValue (true, defaultValue);
    slider.setWantsKeyboardFocus (true);
    slider.addListener (this);
    addAndMakeVisible (slider);

    nameLabel.setText (displayName, juce::dontSendNotification);
    nameLabel.setJustificationType (juce::Justification::centred);
    nameLabel.setColour (juce::Label::textColourId, labelColour);
    nameLabel.setColour (juce::Label::backgroundColourId, juce::Colours::transparentBlack);
    nameLabel.setColour (juce::Label::outlineColourId, juce::Colours::transparentBlack);
    addAndMakeVisible (nameLabel);

    valueLabel.setJustificationType (juce::Justification::centred);
    valueLabel.setColour (juce::Label::textColourId, valueColour);
    valueLabel.setColour (juce::Label::backgroundColourId, juce::Colours::transparentBlack);
    valueLabel.setColour (juce::Label::outlineColourId, juce::Colours::transparentBlack);
    addAndMakeVisible (valueLabel);

    attachment = std::make_unique<juce::AudioProcessorValueTreeState::SliderAttachment> (
        apvts, paramId, slider);

    valueLabel.setText (format (slider.getValue()), juce::dontSendNotification);
}

void KnobComponent::resized()
{
    auto bounds = getLocalBounds();
    auto valueArea = bounds.removeFromBottom (18);
    auto nameArea = bounds.removeFromTop (16);

    const auto square = juce::jmin (bounds.getWidth(), bounds.getHeight());
    nameLabel.setBounds (nameArea);
    slider.setBounds (bounds.withSizeKeepingCentre (square, square));
    valueLabel.setBounds (valueArea);
}

void KnobComponent::sliderValueChanged (juce::Slider* slider)
{
    valueLabel.setText (format (slider->getValue()), juce::dontSendNotification);
}

namespace
{

juce::String buildArch()
{
#if defined (__arm64__) || defined (_M_ARM64) || defined (__aarch64__)
    return "arm64";
#elif defined (__x86_64__) || defined (_M_X64)
    return "x64";
#else
    return "x86";
#endif
}

}

FooterBar::FooterBar (PascalcompressorAudioProcessor& p)
    : processor (p)
{
    leftText = juce::String ("Pascalcompressor 1.0.0")
             + "   \u00B7   " + buildArch()
             + "   \u00B7   VST3 + AU"
             + "   \u00B7   built " + juce::String (PASCAL_BUILD_TIME) + " (local)";
    startTimerHz (2);
}

void FooterBar::timerCallback()
{
    const auto newRight = juce::String (juce::roundToInt (processor.getSampleRate())) + " Hz"
                        + "   \u00B7   " + juce::String (processor.getBlockSize()) + " smp";
    if (newRight != rightText)
    {
        rightText = newRight;
        repaint();
    }
}

void FooterBar::paint (juce::Graphics& g)
{
    g.fillAll (background);
    g.setColour (ruleColour);
    g.fillRect (0, 0, getWidth(), 1);

    g.setColour (footerColour);
    g.setFont (juce::FontOptions (11.0f));

    auto bounds = getLocalBounds().reduced (14, 0);
    g.drawText (leftText, bounds, juce::Justification::centredLeft);
    g.drawText (rightText, bounds, juce::Justification::centredRight);
}

PascalcompressorAudioProcessorEditor::PascalcompressorAudioProcessorEditor (PascalcompressorAudioProcessor& p)
    : AudioProcessorEditor (&p),
      processorRef (p),
      footer (p)
{
    setOpaque (true);
    setResizeLimits (500, 340, 1100, 860);
    setResizable (true, true);

    struct Spec
    {
        const char* id;
        const char* name;
        float defaultValue;
        std::function<juce::String (double)> format;
    };

    const Spec specs[] =
    {
        { "input", "Input", 0.0f,
          [] (double v) { return juce::String::formatted ("%+.1f dB", v); } },
        { "threshold", "Threshold", -18.0f,
          [] (double v) { return juce::String::formatted ("%.1f dB", v); } },
        { "ratio", "Ratio", 2.0f,
          [] (double v) { return juce::String::formatted ("%.2f : 1", v); } },
        { "attack", "Attack", 10.0f,
          [] (double v) { return juce::String::formatted ("%.1f ms", v); } },
        { "release", "Release", 250.0f,
          [] (double v) { return juce::String::formatted ("%.0f ms", v); } },
        { "makeup", "Makeup", 0.0f,
          [] (double v) { return juce::String::formatted ("%+.1f dB", v); } },
        { "drywet", "Dry/Wet", 100.0f,
          [] (double v) { return juce::String (juce::roundToInt (v)) + " %"; } },
    };

    for (const auto& spec : specs)
    {
        auto* knob = new KnobComponent (processorRef.apvts, spec.id, spec.name,
                                        spec.defaultValue, lookAndFeel, spec.format);
        knobs.add (knob);
        addAndMakeVisible (knob);
    }

    addAndMakeVisible (footer);
    ready = true;
    setSize (620, 420);
}

void PascalcompressorAudioProcessorEditor::paint (juce::Graphics& g)
{
    jassert (ready);
    g.fillAll (background);
}

void PascalcompressorAudioProcessorEditor::resized()
{
    if (! ready)
        return;

    auto bounds = getLocalBounds();
    footer.setBounds (bounds.removeFromBottom (24));
    bounds.reduce (24, 16);

    const auto knobSize = juce::jmin (bounds.getWidth() / 4 - 42,
                                      (bounds.getHeight() - 20) / 2 - 40,
                                      120);
    const auto knobHeight = knobSize + 40;
    const auto rowGap = 20;
    const auto rowsTotal = knobHeight * 2 + rowGap;
    const auto rowsTop = bounds.getY() + (bounds.getHeight() - rowsTotal) / 2;

    const auto xStepTop = bounds.getWidth() / 4;
    for (int i = 0; i < 4; ++i)
    {
        const auto x = bounds.getX() + xStepTop * i + (xStepTop - knobSize) / 2;
        knobs.getUnchecked (i)->setBounds (x, rowsTop, knobSize, knobHeight);
    }

    const auto xStepBottom = bounds.getWidth() / 3;
    const auto rowY = rowsTop + knobHeight + rowGap;
    for (int i = 4; i < 7; ++i)
    {
        const auto x = bounds.getX() + xStepBottom * (i - 4) + (xStepBottom - knobSize) / 2;
        knobs.getUnchecked (i)->setBounds (x, rowY, knobSize, knobHeight);
    }
}

}