#pragma once

#include <JuceHeader.h>
#include <memory>
#include "../Resources.h"

namespace serum
{

// ===========================================================================
// Rotary knob — a juce::Slider styled by SerumLookAndFeel. The value readout is
// formatted by a user-provided function via getTextFromValue().
//
// While the knob is being dragged it also shows a small floating label near the
// mouse cursor with the live (formatted) value, giving immediate feedback
// without changing the slider's normal behaviour.
// ===========================================================================
class Knob : public juce::Slider
{
public:
    explicit Knob (const juce::String& name,
                   std::function<juce::String (float)> formatter = {});

    void setFormatter (std::function<juce::String (float)> f) { formatter = std::move (f); }

    juce::String getTextFromValue (double value) override;

    void mouseDown (const juce::MouseEvent& e) override;
    void mouseDrag (const juce::MouseEvent& e) override;
    void mouseUp   (const juce::MouseEvent& e) override;
    void mouseExit (const juce::MouseEvent& e) override;

private:
    void showValuePopup (const juce::MouseEvent& e);
    void hideValuePopup();

    std::function<juce::String (float)> formatter;
    std::unique_ptr<juce::Label> valuePopup;
};

} // namespace serum