#pragma once

#include <JuceHeader.h>
#include "Params.h"
#include "Wavetable.h"
#include "SynthVoice.h"
#include "LFO.h"
#include "FXProcessor.h"
#include "ModulationMatrix.h"
#include "MacroControls.h"

namespace serum
{

// ===========================================================================
// The synthesis engine: a fixed pool of voices, four global LFOs, a wavetable
// library and the FX rack. Owns all per-block DSP and MIDI handling.
// ===========================================================================
class Engine
{
public:
    void prepare (double sampleRate, int blockSize);
    void reset();

    void processBlock (juce::AudioBuffer<float>& buffer,
                       juce::MidiBuffer& midi,
                       juce::AudioProcessorValueTreeState& apvts,
                       juce::AudioPlayHead* playhead);

    // MIDI
    void noteOn (int noteNumber, float velocity01);
    void noteOff (int noteNumber);
    void allNotesOff();

    // Modulation / DSP accessors (read-only for the GUI).
    ModulationMatrix&  getMatrix()     { return matrix; }
    MacroControls&     getMacros()     { return macros; }
    WavetableLibrary&  getWavetables() { return wavetables; }
    const std::array<LFO, kNumLfos>& getLfos() const { return lfos; }
    void setLfoShapeData (int index, const std::vector<float>& data, int steps);

    int  getActiveVoiceCount() const;

private:
    std::array<SynthVoice, kNumVoices> voices;
    std::array<LFO, kNumLfos> lfos;
    WavetableLibrary wavetables;
    FXProcessor fx;
    ModulationMatrix matrix;
    MacroControls macros;

    double sr = 44100.0;
    int    blockSize = 512;
    double bpm = 120.0;
    float  pitchBend = 0.0f;
    float  modWheel  = 0.0f;
    juce::uint64 noteCounter = 0;

    juce::AudioBuffer<float> mixBuffer;

    SynthVoice* findFreeVoice();
    SynthVoice* stealVoice();

    void readOscParams (juce::AudioProcessorValueTreeState& apvts, const char* prefix, OscParams& out);
};

} // namespace serum