Source/Helper/HelperPluginHost.h

#pragma once

#include <juce_audio_processors/juce_audio_processors.h>
#include <juce_gui_basics/juce_gui_basics.h>
#include <thread>
#include <atomic>

#include "SharedAudioBuffer.h"

class HelperPluginHost
{
public:
    HelperPluginHost();
    ~HelperPluginHost();

    // Plugin lifecycle
    bool loadPlugin(const juce::String& path, double sampleRate, int blockSize);
    void unloadPlugin();
    bool isLoaded() const { return plugin != nullptr; }
    juce::String getPluginName() const;
    int getParameterCount() const;

    // Audio processing (shared memory)
    void setSharedAudio(SharedAudioBuffer* shm, SharedSemaphore* inSem, SharedSemaphore* outSem);
    void startProcessing();
    void stopProcessing();

    // Parameters
    struct ParamInfo {
        int index;
        juce::String id;
        juce::String name;
        float value;
        juce::String displayText;
    };
    std::vector<ParamInfo> searchParams(const juce::String& keyword) const;
    std::vector<std::pair<int, float>> getParams(const std::vector<int>& ids) const;
    bool setParams(const std::map<int, float>& values);

    // GUI via CARemoteLayerServer
    void showGui();
    void hideGui();
    int getGuiWidth() const { return guiWidth; }
    int getGuiHeight() const { return guiHeight; }
    void setLayerPortName(const juce::String& name) { layerPortName = name; }
    juce::String getLayerPortName() const { return layerPortName; }

    // Event injection (from host process)
    void injectMouseDown(float x, float y, int button);
    void injectMouseUp(float x, float y, int button);
    void injectMouseMove(float x, float y);
    void injectMouseDrag(float x, float y, int button);
    void injectMouseScroll(float x, float y, float dx, float dy);
    void injectKeyDown(int keyCode, const juce::String& chars, int modifiers);
    void injectKeyUp(int keyCode, const juce::String& chars, int modifiers);

    // State
    juce::String getStateBase64() const;
    bool setStateBase64(const juce::String& base64State);
    void configure(double sampleRate, int blockSize, int channels);

    // Callbacks
    std::function<void(const juce::String& portName, int width, int height)> onGuiCreated;
    std::function<void(int w, int h)> onGuiResized;

private:
    void audioProcessingLoop();

    juce::AudioPluginFormatManager formatManager;
    std::unique_ptr<juce::AudioPluginInstance> plugin;
    std::unique_ptr<juce::AudioProcessorEditor> editor;

    std::thread audioThread;
    std::atomic<bool> processing{false};

    SharedAudioBuffer* sharedAudio = nullptr;
    SharedSemaphore* inputSem = nullptr;
    SharedSemaphore* outputSem = nullptr;

    double currentSampleRate = 44100.0;
    int currentBlockSize = 512;
    int currentChannels = 2;

    // GUI
    int guiWidth = 0;
    int guiHeight = 0;
    juce::String layerPortName;

    // ObjC objects (stored as void* to avoid ObjC in header)
    void* caContext  = nullptr;   // CAContext* — cross-process layer server
    void* guiWindow  = nullptr;   // NSWindow* — off-screen, ordered-front for compositing
};