/*
 * Copyright 2013 (c) Anna Schumaker.
 */
#include <core/error.h>
#include <core/file.h>

#include <glib.h>

#ifdef CONFIG_TEST
const std::string OCARINA_DIR = "ocarina-test";
#elif CONFIG_DEBUG
const std::string OCARINA_DIR = "ocarina-debug";
#else
const std::string OCARINA_DIR = "ocarina";
#endif

File :: File(const std::string &name, unsigned int vers)
      : mode(NOT_OPEN), filename(name), version(vers), prev_version(0)
{
}

File :: ~File()
{
	close();
}

const std::string File :: find_dir()
{
	std::string res(g_get_user_data_dir());
	res += "/" + OCARINA_DIR;
	return res;
}

const std::string File :: get_filepath()
{
	std::string res = "";

	if (filename != "") {
		res  = find_dir();
		res += "/" + filename;
	}
	return res;
}

const unsigned int File :: get_version()
{
	if (mode == OPEN_READ)
		return prev_version;
	return version;
}

bool File :: exists()
{
	return g_file_test(get_filepath().c_str(), G_FILE_TEST_EXISTS);
}

bool File :: open_read()
{
	if (!exists())
		return false;

	std::fstream::open(get_filepath().c_str(), std::fstream::in);
	if (std::fstream::fail())
		return false;

	mode = OPEN_READ;
	std::fstream::operator>>(prev_version);
	getline();
	return true;
}

bool File :: open_write()
{
	if (g_mkdir_with_parents(find_dir().c_str(), 0755) != 0)
		return false;

	std::fstream::open(get_filepath().c_str(), std::fstream::out);
	if (std::fstream::fail())
		return false;

	mode = OPEN_WRITE;
	std::fstream::operator<<(version) << std::endl;
	return true;
}

bool File :: open(OpenMode m)
{
	if ((filename == "") || (m == NOT_OPEN) || (mode != NOT_OPEN))
		return false;

	else if (m == OPEN_READ)
		return open_read();
	else /* m == OPEN_WRITE */
		return open_write();
}

void File :: close()
{
	if (mode != NOT_OPEN)
		std::fstream::close();
	mode = NOT_OPEN;
}

std::string File :: getline()
{
	char c;
	std::string res;

	/* Ignore leading whitespace */
	while (peek() == ' ')
		read(&c, 1);

	std::getline(*static_cast<std::fstream *>(this), res);
	return res;
}