#pragma once

#include <JuceHeader.h>
#include "../Resources.h"
#include "../Params.h"
#include "../LFO.h"

namespace serum
{

// ===========================================================================
// LFO shape view. Step-sequencer and freehand shapes are click/drag editable.
// The preview evaluates the same lfoShapeValue() function as the audio path, so
// the drawn shape cannot drift from the sound. Sample and hold has no phase
// function (the audio level is stateful), so its preview is a labelled
// schematic rather than a fabricated sequence.
// ===========================================================================
class LFODisplay : public juce::Component
{
public:
    void setShape (int s) { if (shape != s) { shape = s; repaint(); } }
    void setShapeData (const std::vector<float>& data, int steps);
    void setOnShapeEdited (std::function<void (const std::vector<float>&, int)> cb) { onEdited = std::move (cb); }

    void paint (juce::Graphics& g) override;
    void mouseDown (const juce::MouseEvent& e) override;
    void mouseDrag (const juce::MouseEvent& e) override;

    // Level the sample-and-hold preview draws. The audio LFO holds a level that
    // the display cannot observe on the message thread, so the preview shows a
    // flat schematic line at this value instead of inventing a sequence.
    static constexpr float kSampleHoldLevel = 0.0f;

    // Value of the current shape at `phase` (0..1); the audio path calls the
    // same lfoShapeValue() with its live sample-and-hold level.
    float valueAt (float phase) const noexcept;

private:
    int   shape = 0;
    std::vector<float> shapeData;
    int   steps = 16;
    std::function<void (const std::vector<float>&, int)> onEdited;

    void  editAt (float x, float y);
};

} // namespace serum