/*
	This file is part of cpp-ethereum.

	cpp-ethereum 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 3 of the License, or
	(at your option) any later version.

	cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Lefteris <lefteris@ethdev.com>
 * @date 2014
 * Takes the parsed AST and produces the Natspec
 * documentation and the ABI interface
 * https://github.com/ethereum/wiki/wiki/Ethereum-Natural-Specification-Format
 *
 * Can generally deal with JSON files
 */

#pragma once

#include <string>
#include <memory>
#include <jsoncpp/json/json.h>

namespace dev
{
namespace solidity
{

// Forward declarations
class ContractDefinition;
enum class DocumentationType: uint8_t;

enum class DocTagType: uint8_t
{
	NONE = 0,
	DEV,
	NOTICE,
	PARAM,
	RETURN,
	AUTHOR,
	TITLE
};

enum class CommentOwner
{
	CONTRACT,
	FUNCTION
};

class InterfaceHandler
{
public:
	InterfaceHandler();

	/// Get the given type of documentation
	/// @param _contractDef The contract definition
	/// @param _type        The type of the documentation. Can be one of the
	///                     types provided by @c DocumentationType
	/// @return             A unique pointer contained string with the json
	///                     representation of provided type
	std::unique_ptr<std::string> getDocumentation(ContractDefinition& _contractDef,
												  DocumentationType _type);
	/// Get the ABI Interface of the contract
	/// @param _contractDef The contract definition
	/// @return             A unique pointer contained string with the json
	///                     representation of the contract's ABI Interface
	std::unique_ptr<std::string> getABIInterface(ContractDefinition& _contractDef);
	/// Get the User documentation of the contract
	/// @param _contractDef The contract definition
	/// @return             A unique pointer contained string with the json
	///                     representation of the contract's user documentation
	std::unique_ptr<std::string> getUserDocumentation(ContractDefinition& _contractDef);
	/// Get the Developer's documentation of the contract
	/// @param _contractDef The contract definition
	/// @return             A unique pointer contained string with the json
	///                     representation of the contract's developer documentation
	std::unique_ptr<std::string> getDevDocumentation(ContractDefinition& _contractDef);

private:
	void resetUser();
	void resetDev();

	std::string::const_iterator parseDocTagLine(std::string::const_iterator _pos,
												std::string::const_iterator _end,
												std::string& _tagString,
												DocTagType _tagType);
	std::string::const_iterator parseDocTagParam(std::string::const_iterator _pos,
												 std::string::const_iterator _end);
	std::string::const_iterator appendDocTagParam(std::string::const_iterator _pos,
												  std::string::const_iterator _end);
	void parseDocString(std::string const& _string, CommentOwner _owner);
	std::string::const_iterator appendDocTag(std::string::const_iterator _pos,
											 std::string::const_iterator _end,
											 CommentOwner _owner);
	std::string::const_iterator parseDocTag(std::string::const_iterator _pos,
											std::string::const_iterator _end,
											std::string const& _tag,
											CommentOwner _owner);

	Json::StyledWriter m_writer;

	// internal state
	DocTagType m_lastTag;
	std::string m_notice;
	std::string m_dev;
	std::string m_return;
	std::string m_contractAuthor;
	std::string m_author;
	std::string m_title;
	std::vector<std::pair<std::string, std::string>> m_params;
};

} //solidity NS
} // dev NS