/*
 * JsonParser.h, part of VCMI engine
 *
 * Authors: listed in file AUTHORS in main folder
 *
 * License: GNU General Public License v2.0 or later
 * Full text of license available in license.txt file, in main folder
 *
 */
#pragma once

#include "JsonNode.h"

VCMI_LIB_NAMESPACE_BEGIN

//Internal class for string -> JsonNode conversion
class JsonParser
{
	const JsonParsingSettings settings;

	std::string errors; // Contains description of all encountered errors
	std::string_view input; // Input data
	uint32_t lineCount; // Currently parsed line, starting from 1
	uint32_t currentDepth;
	size_t lineStart; // Position of current line start
	size_t pos; // Current position of parser

	//Helpers
	bool extractEscaping(std::string & str);
	bool extractLiteral(std::string & literal);
	bool extractAndCompareLiteral(const std::string & expectedLiteral);
	bool extractString(std::string & string);
	bool extractWhitespace(bool verbose = true);
	bool extractSeparator();
	bool extractElement(JsonNode & node, char terminator);

	//Methods for extracting JSON data
	bool extractArray(JsonNode & node);
	bool extractFalse(JsonNode & node);
	bool extractFloat(JsonNode & node);
	bool extractNull(JsonNode & node);
	bool extractString(JsonNode & node);
	bool extractStruct(JsonNode & node);
	bool extractTrue(JsonNode & node);
	bool extractValue(JsonNode & node);

	//Add error\warning message to list
	bool error(const std::string & message, bool warning = false);

public:
	JsonParser(const std::byte * inputString, size_t stringSize, const JsonParsingSettings & settings);

	/// do actual parsing. filename is name of file that will printed to console if any errors were found
	JsonNode parse(const std::string & fileName);

	/// returns true if parsing was successful
	bool isValid();
};

VCMI_LIB_NAMESPACE_END