#pragma once

#include <JuceHeader.h>

#include <algorithm>

#include "../LookAndFeel.h"
#include "../audio/AudioRecorder.h"
#include "../components/AudioPlayerComponent.h"
#include "../components/DownloaderComponent.h"
#include "../components/StopwatchComponent.h"
#include "../components/SvgButton.h"
#include "../img/qoixx.hpp"
#include "../video/FFmpegEncoderManager.h"
#include "../wav/WavParser.h"
#include "RecordingSettings.h"
#include "VisualiserSettings.h"

#define FILE_RENDER_DUMMY 0
#define FILE_RENDER_PNG 1
#define FILE_RENDER_QOI 2

enum class FullScreenMode {
    TOGGLE,
    FULL_SCREEN,
    MAIN_COMPONENT,
};

struct Texture {
    GLuint id;
    int width;
    int height;
};

class CommonAudioProcessor;
class CommonPluginEditor;
class VisualiserWindow;
class VisualiserComponent : public juce::Component, public osci::AudioBackgroundThread, public juce::MouseListener, public juce::OpenGLRenderer, public juce::AsyncUpdater {
public:
    VisualiserComponent(
        CommonAudioProcessor& processor,
        CommonPluginEditor& editor,
#if OSCI_PREMIUM
        SharedTextureManager& sharedTextureManager,
#endif
        juce::File ffmpegFile,
        VisualiserSettings& settings,
        RecordingSettings& recordingSettings,
        VisualiserComponent* parent = nullptr,
        bool visualiserOnly = false);
    ~VisualiserComponent() override;

    std::function<void()> openSettings;
    std::function<void()> closeSettings;

    void enableFullScreen();
    void setFullScreen(bool fullScreen);
    void setFullScreenCallback(std::function<void(FullScreenMode)> callback);
    void mouseDoubleClick(const juce::MouseEvent& event) override;
    void resized() override;
    void paint(juce::Graphics& g) override;
    int prepareTask(double sampleRate, int samplesPerBlock) override;
    void runTask(const std::vector<osci::Point>& points) override;
    void stopTask() override;
    void setPaused(bool paused, bool affectAudio = true);
    void mouseDrag(const juce::MouseEvent& event) override;
    void mouseMove(const juce::MouseEvent& event) override;
    void mouseDown(const juce::MouseEvent& event) override;
    bool keyPressed(const juce::KeyPress& key) override;
    void handleAsyncUpdate() override;
    void newOpenGLContextCreated() override;
    void renderOpenGL() override;
    void openGLContextClosing() override;
    void setRecording(bool recording);
    void childUpdated();

    VisualiserComponent* parent = nullptr;
    VisualiserComponent* child = nullptr;
    std::unique_ptr<VisualiserWindow> popout = nullptr;

    std::atomic<bool> active = true;

private:
    CommonAudioProcessor& audioProcessor;
    CommonPluginEditor& editor;

    float intensity;

    bool visualiserOnly;
    AudioPlayerComponent audioPlayer{audioProcessor};

    SvgButton fullScreenButton{"fullScreen", BinaryData::fullscreen_svg, juce::Colours::white, juce::Colours::white};
    SvgButton popOutButton{"popOut", BinaryData::open_in_new_svg, juce::Colours::white, juce::Colours::white};
    SvgButton settingsButton{"settings", BinaryData::cog_svg, juce::Colours::white, juce::Colours::white};
    SvgButton audioInputButton{"audioInput", BinaryData::microphone_svg, juce::Colours::white, juce::Colours::red};

#if OSCI_PREMIUM
    SvgButton sharedTextureButton{"sharedTexture", BinaryData::spout_svg, juce::Colours::white, juce::Colours::red};
    SharedTextureManager& sharedTextureManager;
    SharedTextureSender* sharedTextureSender = nullptr;
#endif

    int lastMouseX = 0;
    int lastMouseY = 0;
    int timerId = 0;
    bool hideButtonRow = false;
    bool fullScreen = false;
    std::function<void(FullScreenMode)> fullScreenCallback;

    VisualiserSettings& settings;
    RecordingSettings& recordingSettings;
    juce::File ffmpegFile;
    bool recordingAudio = true;

#if OSCI_PREMIUM
    bool recordingVideo = true;
    bool downloading = false;

    long numFrames = 0;
    std::vector<unsigned char> framePixels;
    osci::WriteProcess ffmpegProcess;
    std::unique_ptr<juce::TemporaryFile> tempVideoFile;
    FFmpegEncoderManager ffmpegEncoderManager;
#endif

    StopwatchComponent stopwatch;
    SvgButton record{"Record", BinaryData::record_svg, juce::Colours::red, juce::Colours::red.withAlpha(0.01f)};

    std::unique_ptr<juce::FileChooser> chooser;
    std::unique_ptr<juce::TemporaryFile> tempAudioFile;
    AudioRecorder audioRecorder;

    osci::Semaphore renderingSemaphore{0};

    void popoutWindow();

    // OPENGL

    juce::OpenGLContext openGLContext;

    juce::Rectangle<int> buttonRow;
    juce::Rectangle<int> viewportArea;

    float renderScale = 1.0f;

    GLuint quadIndexBuffer = 0;
    GLuint vertexIndexBuffer = 0;
    GLuint vertexBuffer = 0;

    int nEdges = 0;

    juce::CriticalSection samplesLock;
    long sampleCount = 0;
    juce::AudioBuffer<float> audioOutputBuffer;
    std::vector<float> xSamples{2};
    std::vector<float> ySamples{2};
    std::vector<float> zSamples{2};
    std::vector<float> smoothedXSamples;
    std::vector<float> smoothedYSamples;
    std::vector<float> smoothedZSamples;
    std::atomic<int> sampleBufferCount = 0;
    int prevSampleBufferCount = 0;
    long lastTriggerPosition = 0;

    std::vector<float> scratchVertices;
    std::vector<float> fullScreenQuad;

    GLuint frameBuffer = 0;

    double currentFrameRate = 60.0;
    Texture lineTexture;
    Texture blur1Texture;
    Texture blur2Texture;
    Texture blur3Texture;
    Texture blur4Texture;
    Texture glowTexture;
    Texture renderTexture;
    Texture screenTexture;
    juce::OpenGLTexture screenOpenGLTexture;
    std::optional<Texture> targetTexture = std::nullopt;

    juce::Image screenTextureImage = juce::ImageFileFormat::loadFrom(BinaryData::noise_jpg, BinaryData::noise_jpgSize);
    juce::Image emptyScreenImage = juce::ImageFileFormat::loadFrom(BinaryData::empty_jpg, BinaryData::empty_jpgSize);

#if OSCI_PREMIUM
    juce::Image oscilloscopeImage = juce::ImageFileFormat::loadFrom(BinaryData::real_png, BinaryData::real_pngSize);
    juce::Image vectorDisplayImage = juce::ImageFileFormat::loadFrom(BinaryData::vector_display_png, BinaryData::vector_display_pngSize);

    juce::Image emptyReflectionImage = juce::ImageFileFormat::loadFrom(BinaryData::no_reflection_jpg, BinaryData::no_reflection_jpgSize);
    juce::Image oscilloscopeReflectionImage = juce::ImageFileFormat::loadFrom(BinaryData::real_reflection_png, BinaryData::real_reflection_pngSize);
    juce::Image vectorDisplayReflectionImage = juce::ImageFileFormat::loadFrom(BinaryData::vector_display_reflection_png, BinaryData::vector_display_reflection_pngSize);

    osci::Point REAL_SCREEN_OFFSET = {0.02, -0.15};
    osci::Point REAL_SCREEN_SCALE = {0.6};

    osci::Point VECTOR_DISPLAY_OFFSET = {0.075, -0.045};
    osci::Point VECTOR_DISPLAY_SCALE = {0.6};
    float VECTOR_DISPLAY_FISH_EYE = 0.5;

    juce::OpenGLTexture reflectionOpenGLTexture;
    Texture reflectionTexture;

    std::unique_ptr<juce::OpenGLShaderProgram> glowShader;
    std::unique_ptr<juce::OpenGLShaderProgram> afterglowShader;
#endif

    std::unique_ptr<juce::OpenGLShaderProgram> simpleShader;
    std::unique_ptr<juce::OpenGLShaderProgram> texturedShader;
    std::unique_ptr<juce::OpenGLShaderProgram> blurShader;
    std::unique_ptr<juce::OpenGLShaderProgram> wideBlurShader;
    std::unique_ptr<juce::OpenGLShaderProgram> lineShader;
    std::unique_ptr<juce::OpenGLShaderProgram> outputShader;
    juce::OpenGLShaderProgram* currentShader;

    float fadeAmount;
    ScreenOverlay screenOverlay = ScreenOverlay::INVALID;

    const double RESAMPLE_RATIO = 6.0;
    double sampleRate = -1;
    double oldSampleRate = -1;
    chowdsp::ResamplingTypes::LanczosResampler<2048, 8> xResampler;
    chowdsp::ResamplingTypes::LanczosResampler<2048, 8> yResampler;
    chowdsp::ResamplingTypes::LanczosResampler<2048, 8> zResampler;

    void setOffsetAndScale(juce::OpenGLShaderProgram* shader);
#if OSCI_PREMIUM
    void initialiseSharedTexture();
    void closeSharedTexture();
#endif
    Texture makeTexture(int width, int height, GLuint textureID = 0);
    void setResolution(int width);
    void setupArrays(int num_points);
    void setupTextures();
    void drawLineTexture(const std::vector<float>& xPoints, const std::vector<float>& yPoints, const std::vector<float>& zPoints);
    void saveTextureToPNG(Texture texture, const juce::File& file);
    void saveTextureToQOI(Texture texture, const juce::File& file);
    void activateTargetTexture(std::optional<Texture> texture);
    void setShader(juce::OpenGLShaderProgram* program);
    void drawTexture(std::vector<std::optional<Texture>> textures);
    void setAdditiveBlending();
    void setNormalBlending();
    void drawLine(const std::vector<float>& xPoints, const std::vector<float>& yPoints, const std::vector<float>& zPoints);
    void fade();
    void drawCRT();
    void checkGLErrors(juce::String file, int line);
    void viewportChanged(juce::Rectangle<int> area);

    void renderScope(const std::vector<float>& xPoints, const std::vector<float>& yPoints, const std::vector<float>& zPoints);

    double getSweepIncrement();

    Texture createScreenTexture();
    Texture createReflectionTexture();

    juce::File audioFile;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(VisualiserComponent)
    JUCE_DECLARE_WEAK_REFERENCEABLE(VisualiserComponent)
};

class VisualiserWindow : public juce::DocumentWindow {
public:
    VisualiserWindow(juce::String name, VisualiserComponent* parent) : parent(parent), wasPaused(!parent->active), juce::DocumentWindow(name, juce::Colours::black, juce::DocumentWindow::TitleBarButtons::allButtons) {
        setAlwaysOnTop(true);
    }

    void closeButtonPressed() override {
        // local copy of parent so that we can safely delete the child
        VisualiserComponent* parent = this->parent;
        parent->setPaused(wasPaused);
        parent->child = nullptr;
        parent->popout.reset();
        parent->childUpdated();
        parent->resized();
    }

private:
    VisualiserComponent* parent;
    bool wasPaused;
};