#include "EterBase/StdAfx.h"
#include "EterBase/MappedFile.h"
#include "EterPack/EterPackManager.h"
#include "UserInterface/UserInterface.h"
#include "PackBackend.h"

#include <mutex>

#if defined(_WIN32)
#include <io.h> // _access; elsewhere the <windows.h> shim declares it
#endif

namespace mtpack40250 {

namespace {
std::mutex g_init_mutex;
bool g_initialized = false;
bool g_ready = false;
}

bool initialize(const std::string& client_dir)
{
	std::lock_guard<std::mutex> lock(g_init_mutex);
	if (g_initialized)
		return g_ready;
	const std::string folder = client_dir + "/pack";
	if (_access((folder + "/Index").c_str(), 0) != 0)
		return false; // nothing registered; a later call with the right directory may still succeed
	g_initialized = true;
	PackSingletons();
	g_ready = PackInitialize(folder.c_str());
	return g_ready;
}

bool ready()
{
	std::lock_guard<std::mutex> lock(g_init_mutex);
	return g_ready;
}

bool read(const std::string& name, std::vector<uint8_t>& out)
{
	out.clear();
	if (!ready())
		return false;
	CMappedFile file;
	LPCVOID data = nullptr;
	if (!CEterPackManager::Instance().Get(file, name.c_str(), &data))
		return false;
	const BYTE* bytes = static_cast<const BYTE*>(data);
	out.assign(bytes, bytes + file.Size());
	return true;
}

bool exists(const std::string& name)
{
	return ready() && CEterPackManager::Instance().isExist(name.c_str());
}

} // namespace mtpack40250