#pragma once

#include <vector>

#include <vulkan/vulkan.h>

#include <string>
#include <vector>
#include <map>
#include <set>
#include <iostream>
#include <optional>
#include <fstream>

namespace Engine {

struct Support {
    Support();

    void logSupported(const std::string& header);

    std::vector<const char*> supported;
    std::vector<const char*> unsupported;
    std::vector<const char*> unsupportedCritical;

};

struct SwapChainSupportDetails {
    VkSurfaceCapabilitiesKHR capabilities;
    std::vector<VkSurfaceFormatKHR> formats;
    std::vector<VkPresentModeKHR> presentModes;

    bool adequate() const;
};

struct QueueFamilyIndices {
    std::optional<uint32_t> graphicsFamily;
    std::optional<uint32_t> presentFamily;

    bool isComplete() const;
};

Support getVulkanLayers(const std::set<std::string>& requestedLayers);
Support getVulkanExtensions(const std::set<std::string>& requestedExtensions, const std::vector<const char*>& criticalExtensions);
VkSurfaceFormatKHR chooseSwapSurfaceFormat(const std::vector<VkSurfaceFormatKHR>& availableFormats);
VkPresentModeKHR chooseSwapPresentMode(const std::vector<VkPresentModeKHR>& availablePresentModes);

std::vector<VkExtensionProperties> getAvailableVulkanExtensions();
std::vector<VkLayerProperties> getAvailableVulkanLayers();

void populateDebugMessengerCreateInfo(
    VkDebugUtilsMessengerCreateInfoEXT& createInfo,
    PFN_vkDebugUtilsMessengerCallbackEXT debugCallback
);

static VKAPI_ATTR VkBool32 VKAPI_CALL debugCallback(
    VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity,
    VkDebugUtilsMessageTypeFlagsEXT messageType,
    const VkDebugUtilsMessengerCallbackDataEXT* callbackData,
    void* userData
)
{
    std::cerr << "validation layer: " << callbackData->pMessage << std::endl;
    return true;
}

VkResult createDebugUtilsMessengerEXT(
    VkInstance instance,
    const VkDebugUtilsMessengerCreateInfoEXT* pCreateInfo,
    const VkAllocationCallbacks* pAllocator,
    VkDebugUtilsMessengerEXT* pDebugMessenger
);

void destroyDebugUtilsMessengerEXT(
    VkInstance instance,
    VkDebugUtilsMessengerEXT debugMessenger,
    const VkAllocationCallbacks* pAllocator
);

std::vector<char> readFile(const std::string& filename);
}