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#ifndef QVULKANINSTANCE_H
#define QVULKANINSTANCE_H

#include <QtGui/qtguiglobal.h>

#if QT_CONFIG(vulkan) || defined(Q_CLANG_QDOC)

#ifndef VK_NO_PROTOTYPES
#define VK_NO_PROTOTYPES
#endif
#include <vulkan/vulkan.h>

#include <QtCore/qscopedpointer.h>
#include <QtCore/qvector.h>
#include <QtCore/qbytearraylist.h>
#include <QtCore/qversionnumber.h>
#include <QtCore/qdebug.h>

QT_BEGIN_NAMESPACE

class QVulkanInstancePrivate;
class QPlatformVulkanInstance;
class QVulkanFunctions;
class QVulkanDeviceFunctions;
class QWindow;

struct Q_GUI_EXPORT QVulkanLayer
{
    QByteArray name;
    uint32_t version;
    QVersionNumber specVersion;
    QByteArray description;
    bool operator==(const QVulkanLayer &other) const {
        return name == other.name && version == other.version && specVersion == other.specVersion;
    }
};

struct Q_GUI_EXPORT QVulkanExtension
{
    QByteArray name;
    uint32_t version;
    bool operator==(const QVulkanExtension &other) const {
        return name == other.name && version == other.version;
    }
};

#ifndef QT_NO_DEBUG_STREAM
Q_GUI_EXPORT QDebug operator<<(QDebug, const QVulkanLayer &);
Q_GUI_EXPORT QDebug operator<<(QDebug, const QVulkanExtension &);
#endif

template<typename T>
class QVulkanInfoVector : public QVector<T>
{
public:
    bool contains(const QByteArray &name) const {
        return std::any_of(this->cbegin(), this->cend(), [&](const T &entry) {
            return entry.name == name; });
    }
    bool contains(const QByteArray &name, int minVersion) const {
        return std::any_of(this->cbegin(), this->cend(), [&](const T &entry) {
            return entry.name == name && entry.version >= minVersion; });
    }
};

class Q_GUI_EXPORT QVulkanInstance
{
public:
    QVulkanInstance();
    ~QVulkanInstance();

    enum Flag {
        NoDebugOutputRedirect = 0x01
    };
    Q_DECLARE_FLAGS(Flags, Flag)

    QVulkanInfoVector<QVulkanLayer> supportedLayers();
    QVulkanInfoVector<QVulkanExtension> supportedExtensions();

    void setVkInstance(VkInstance existingVkInstance);

    void setFlags(Flags flags);
    void setLayers(const QByteArrayList &layers);
    void setExtensions(const QByteArrayList &extensions);
    void setApiVersion(const QVersionNumber &vulkanVersion);

    bool create();
    void destroy();
    bool isValid() const;
    VkResult errorCode() const;

    VkInstance vkInstance() const;

    Flags flags() const;
    QByteArrayList layers() const;
    QByteArrayList extensions() const;
    QVersionNumber apiVersion() const;

    PFN_vkVoidFunction getInstanceProcAddr(const char *name);

    QPlatformVulkanInstance *handle() const;

    QVulkanFunctions *functions() const;
    QVulkanDeviceFunctions *deviceFunctions(VkDevice device);
    void resetDeviceFunctions(VkDevice device);

    static VkSurfaceKHR surfaceForWindow(QWindow *window);

    bool supportsPresent(VkPhysicalDevice physicalDevice, uint32_t queueFamilyIndex, QWindow *window);

    void presentQueued(QWindow *window);

private:
    QScopedPointer<QVulkanInstancePrivate> d_ptr;
    Q_DISABLE_COPY(QVulkanInstance)
};

Q_DECLARE_OPERATORS_FOR_FLAGS(QVulkanInstance::Flags)

QT_END_NAMESPACE

#endif // QT_CONFIG(vulkan)

#endif // QVULKANINSTANCE_H