#include "gxfilesystem.hpp"
#include <set>

static std::set<gxDir*> dir_set;

gxFileSystem::gxFileSystem()
{
	dir_set.clear();
}

gxFileSystem::~gxFileSystem()
{
	while (dir_set.size())
		closeDir(*dir_set.begin());
}

bool gxFileSystem::createDir(const std::string& dir)
{
	return CreateDirectory(dir.c_str(), 0) ? true : false;
}

bool gxFileSystem::deleteDir(const std::string& dir)
{
	return RemoveDirectory(dir.c_str()) ? true : false;
}

bool gxFileSystem::createFile(const std::string& file)
{
	return false;
}

bool gxFileSystem::deleteFile(const std::string& file)
{
	return DeleteFile(file.c_str()) ? true : false;
}

bool gxFileSystem::copyFile(const std::string& src, const std::string& dest)
{
	return CopyFile(src.c_str(), dest.c_str(), false) ? true : false;
}

bool gxFileSystem::renameFile(const std::string& src, const std::string& dest)
{
	return MoveFile(src.c_str(), dest.c_str()) ? true : false;
}

bool gxFileSystem::setCurrentDir(const std::string& dir)
{
	return SetCurrentDirectory(dir.c_str()) ? true : false;
}

std::string gxFileSystem::getCurrentDir() const
{
	char buff[MAX_PATH];
	if (!GetCurrentDirectory(MAX_PATH, buff))
		return "";
	std::string t = buff;
	if (t.size() && t[t.size() - 1] != '\\')
		t += '\\';
	return t;
}

int gxFileSystem::getFileSize(const std::string& name) const
{
	WIN32_FIND_DATA findData;
	HANDLE          h = FindFirstFile(name.c_str(), &findData);
	if (h == INVALID_HANDLE_VALUE)
		return 0;
	int n = findData.dwFileAttributes, sz = findData.nFileSizeLow;
	FindClose(h);
	return n & FILE_ATTRIBUTE_DIRECTORY ? 0 : sz;
}

int gxFileSystem::getFileType(const std::string& name) const
{
	DWORD t = GetFileAttributes(name.c_str());
	return t == -1 ? FILE_TYPE_NONE : (t & FILE_ATTRIBUTE_DIRECTORY ? FILE_TYPE_DIR : FILE_TYPE_FILE);
}

gxDir* gxFileSystem::openDir(const std::string& name, int flags)
{
	std::string t = name;
	if (t[t.size() - 1] == '\\')
		t += "*";
	else
		t += "\\*";
	WIN32_FIND_DATA f;
	HANDLE          h = FindFirstFile(t.c_str(), &f);
	if (h != INVALID_HANDLE_VALUE) {
		gxDir* d = new gxDir(h, f);
		dir_set.insert(d);
		return d;
	}
	return 0;
}

gxDir* gxFileSystem::verifyDir(gxDir* d)
{
	return dir_set.count(d) ? d : 0;
}

void gxFileSystem::closeDir(gxDir* d)
{
	if (dir_set.erase(d))
		delete d;
}