#pragma once

#include "common/Common.hpp"

#include <QPixmap>
#include <QString>
#include <QThread>
#include <QVector>
#include <atomic>
#include <boost/noncopyable.hpp>
#include <boost/variant.hpp>
#include <memory>
#include <mutex>

#include "common/NullablePtr.hpp"

namespace chatterino {
namespace {
template <typename Image>
struct Frame {
    Image image;
    int duration;
};
class Frames
{
public:
    Frames();
    Frames(const QVector<Frame<QPixmap>> &frames);
    ~Frames();
    Frames(Frames &&other) = default;
    Frames &operator=(Frames &&other) = default;

    bool animated() const;
    void advance();
    boost::optional<QPixmap> current() const;
    boost::optional<QPixmap> first() const;

private:
    QVector<Frame<QPixmap>> items_;
    int index_{0};
    int durationOffset_{0};
};
}  // namespace

class Image;
using ImagePtr = std::shared_ptr<Image>;

class Image : public std::enable_shared_from_this<Image>, boost::noncopyable
{
public:
    static ImagePtr fromUrl(const Url &url, qreal scale = 1);
    static ImagePtr fromPixmap(const QPixmap &pixmap, qreal scale = 1);
    static ImagePtr getEmpty();

    const Url &url() const;
    boost::optional<QPixmap> pixmap() const;
    qreal scale() const;
    bool isEmpty() const;
    int width() const;
    int height() const;
    bool animated() const;

    bool operator==(const Image &image) const;
    bool operator!=(const Image &image) const;

private:
    Image();
    Image(const Url &url, qreal scale);
    Image(const QPixmap &nonOwning, qreal scale);

    void load();

    Url url_{};
    qreal scale_{1};
    bool empty_{false};
    bool shouldLoad_{false};
    Frames frames_{};
    QObject object_{};
};
}  // namespace chatterino