#include "GlfwWindowManager.h"

#include <algorithm>

#include "Logger.h"

VkSurfaceKHR GlfwWindowManager::Surface = VK_NULL_HANDLE;
GLFWwindow*	 GlfwWindowManager::Window = nullptr;

GlfwWindowManager::GlfwWindowManager() = default;

GlfwWindowManager::~GlfwWindowManager()
{
	// Cleanup();
}

// GlfwWindowManager::GlfwWindowManager(GlfwWindowManager&& Other) noexcept
//	: Window(Other.Window), Config(Other.Config), Surface(Other.Surface)
//{
//	Other.Window = nullptr;
// }
//
// GlfwWindowManager& GlfwWindowManager::operator=(GlfwWindowManager&& Other) noexcept
//{
//	if (this != &Other)
//	{
//		Cleanup();
//
//		Window = Other.Window;
//		Config = Other.Config;
//		Surface = Other.Surface;
//
//		Other.Window = nullptr;
//	}
//
//	return *this;
// }

void GlfwWindowManager::Initialize(const FWindowConfig& Config)
{
	if (IsInitialized())
	{
		return;
	}

	this->Config = Config;

	InitializeGlfw();
}

void GlfwWindowManager::Cleanup(VkInstance Instance)
{
	if (!IsInitialized())
	{
		Log::Warning("Not initialized");
		return;
	}

	DestroyWindow();

	glfwTerminate();
}

bool GlfwWindowManager::ShouldClose() const
{
	return Window && glfwWindowShouldClose(Window);
}

void GlfwWindowManager::PollEvents()
{
	if (Window)
	{
		glfwPollEvents();
	}
}

void GlfwWindowManager::WaitEvents() const
{
	if (Window)
	{
		glfwWaitEvents();
	}
}

void GlfwWindowManager::SetTitle(const std::string& Title)
{
	// this->Title = Title;

	if (Window)
	{
		glfwSetWindowTitle(Window, Title.c_str());
	}
}

void GlfwWindowManager::CreateSurface(VkInstance Instance)
{
	if (!Window)
	{
		Log::Error("Window not initialized.");
	}

	if (!Instance)
	{
		Log::Error("Instance is null.");
	}

	VkResult result = glfwCreateWindowSurface(Instance, Window, nullptr, &Surface);
	if (result != VK_SUCCESS)
	{
		std::string errorMsg;
		switch (result)
		{
			case VK_ERROR_EXTENSION_NOT_PRESENT:
				errorMsg = "VK_ERROR_EXTENSION_NOT_PRESENT - Required extension not present";
				break;
			case VK_ERROR_INITIALIZATION_FAILED:
				errorMsg = "VK_ERROR_INITIALIZATION_FAILED - Initialization failed";
				break;
			case VK_ERROR_NATIVE_WINDOW_IN_USE_KHR:
				errorMsg = "VK_ERROR_NATIVE_WINDOW_IN_USE_KHR - Native window already in use";
				break;
			default:
				errorMsg = "Unknown error code: " + std::to_string(result);
				break;
		}

		Log::Error("Failed to create window surface: " + errorMsg);
	}
	else
	{
		Log::Info("Window surface created successfully.");
	}
}

void GlfwWindowManager::SetResizeCallback(GLFWwindowsizefun Callback)
{
	if (Window)
	{
		glfwSetWindowSizeCallback(Window, Callback);
	}
}

void GlfwWindowManager::SetKeyCallback(GLFWkeyfun Callback)
{
	if (Window)
	{
		glfwSetKeyCallback(Window, Callback);
	}
}

void GlfwWindowManager::SetMouseButtonCallback(GLFWmousebuttonfun Callback)
{
	if (Window)
	{
		glfwSetMouseButtonCallback(Window, Callback);
	}
}

void GlfwWindowManager::SetCursorPositionCallback(GLFWcursorposfun Callback)
{
	if (Window)
	{
		glfwSetCursorPosCallback(Window, Callback);
	}
}

void GlfwWindowManager::SetScrollCallback(GLFWscrollfun Callback)
{
	if (Window)
	{
		glfwSetScrollCallback(Window, Callback);
	}
}

void GlfwWindowManager::DestroyWindow()
{
	if (Window)
	{
		glfwDestroyWindow(Window);
		Window = nullptr;
	}
}

void GlfwWindowManager::InitializeGlfw()
{
	if (!IsInitialized())
	{
		if (!glfwInit())
		{
			Log::Error("Failed to initialize GLFW");
		}
	}

	glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
	glfwWindowHint(GLFW_RESIZABLE, Config.bResizable ? GLFW_TRUE : GLFW_FALSE);

	Window = glfwCreateWindow(
		Config.Width,
		Config.Height,
		Config.Title.c_str(),
		Config.bFullscreen ? glfwGetPrimaryMonitor() : nullptr,
		nullptr);

	if (!Window)
	{
		Log::Error("Failed to create GLFW window");
	}
	else
	{
		Log::Info("Created GLFW window successfully.");
	}
}