#include <cstdio>
#include <iterator>

#include "LocalFile.h"
#include "Exception.h"

LocalFile LocalFile::instance(protocol);

void LocalFile::open(const std::string url) {
	std::string path = url;
	if (path.starts_with(protocol))
		path = path.substr(protocol.size());

	_file = new std::ifstream(path, std::ios::in);
	if (_file->fail() || !_file->is_open())
		throw Exception("Cannot open file://%s\n", path.c_str());
}

void LocalFile::close() {
	if (_file == nullptr) return;

	if (_file->is_open())
		_file->close();
}

const std::string LocalFile::read() {
	if (_file == nullptr)
		throw Exception("File read after destructor\n");

	if (!_file->is_open())
		throw Exception("File read after close\n");

	return std::string(
		std::istreambuf_iterator<char>(*_file),
		std::istreambuf_iterator<char>()
	);
}

LocalFile::~LocalFile() {
	close();

	if (_file != nullptr) {
		delete _file;
		_file = nullptr;
	}
}

LocalFile * LocalFile::clone() const {
	return new LocalFile(this);
}

LocalFile::LocalFile(const LocalFile *) : File() { }