/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/

#ifndef BACKENDS_NETWORKING_SDL_NET_READER_H
#define BACKENDS_NETWORKING_SDL_NET_READER_H

#include "common/str.h"
#include "common/hashmap.h"
#include "common/hash-str.h"

namespace Common {
class MemoryReadWriteStream;
class WriteStream;
}

namespace Networking {

enum ReaderState {
	RS_NONE,
	RS_READING_HEADERS,
	RS_READING_CONTENT
};

class Reader {
	ReaderState _state;
	Common::MemoryReadWriteStream *_content;
	uint32 _bytesLeft;

	byte *_window;
	uint32 _windowUsed, _windowSize;

	Common::String _headers;
	Common::String _method, _path, _query, _anchor;
	Common::HashMap<Common::String, Common::String> _queryParameters;
	uint32 _contentLength;
	Common::String _boundary;
	uint32 _availableBytes;
	bool _firstBlock;
	bool _isBadRequest;
	bool _allContentRead;

	void cleanup();

	bool readAndHandleFirstHeaders(); //true when ended reading
	bool readBlockHeadersIntoStream(Common::WriteStream *stream); //true when ended reading
	bool readContentIntoStream(Common::WriteStream *stream); //true when ended reading

	void handleFirstHeaders(Common::String headers);
	void parseFirstLine(const Common::String &headers);
	void parsePathQueryAndAnchor(Common::String path);
	void parseQueryParameters();

	void makeWindow(uint32 size);
	void freeWindow();
	bool readOneByteInStream(Common::WriteStream *stream, const Common::String &boundary);
	bool readOneByteInString(Common::String &buffer, const Common::String &boundary);

	byte readOne();
	uint32 bytesLeft();

public:
	Reader();
	~Reader();

	Reader &operator=(Reader &r);

	bool readFirstHeaders(); //true when ended reading
	bool readFirstContent(Common::WriteStream *stream); //true when ended reading
	bool readBlockHeaders(Common::WriteStream *stream); //true when ended reading
	bool readBlockContent(Common::WriteStream *stream); //true when ended reading

	void setContent(Common::MemoryReadWriteStream *stream);

	bool badRequest() const;
	bool noMoreContent() const;

	Common::String headers() const;
	Common::String method() const;
	Common::String path() const;
	Common::String query() const;
	Common::String queryParameter(Common::String name) const;
	Common::String anchor() const;
};

} // End of namespace Networking

#endif