#include "BinaryFile.h"

BinaryFile::BinaryFile(const string path, fstream::openmode openMode)
{
	this->path = path;
	//...
	this->openMode = openMode | fstream::binary;
	file.open(path, this->openMode);
}

FileError BinaryFile::Write(const vector<Point>& points)
{
	if (!this->file.is_open())
		return FileError::FILE_INVALID;

	if (!(openMode & fstream::out))
		return FileError::ACCESS_DENIED;


	int bytes = points.size() * sizeof(Point);
	file.write((const char*)points.data(), bytes);

	return FileError::SUCCESS;
}

FileError BinaryFile::Read(vector<Point>& points)
{
	if (!this->file.is_open())
		return FileError::FILE_INVALID;

	if (!(openMode & fstream::in))
		return FileError::ACCESS_DENIED;

	file.seekg(0, file.end);
	int bytes = file.tellg();
	file.seekg(0, file.beg);

	if (bytes <= 0)
		return FileError::OUT_OF_BOUNDS;

	int pointsCount = bytes / sizeof(Point);
	points = vector<Point>(pointsCount);

	file.read((char*)points.data(), bytes);

	return FileError::SUCCESS;
}

FileError BinaryFile::Read(Point& point, int index)
{
	if (!file.is_open())
		return FileError::FILE_INVALID;

	if (!(openMode & fstream::in))
		return FileError::ACCESS_DENIED;

	file.seekg(0, file.end);
	int bytes = file.tellg();
	file.seekg(0, file.beg);

	if (index * sizeof(Point) >= bytes)
		return FileError::OUT_OF_BOUNDS;

	file.seekg(index * sizeof(Point), file.beg);
	file.read((char*)&point, sizeof(Point));

	return FileError::SUCCESS;
}