#include "ParserFactory.h"
#include "Exception.h"

#include "XMLParser.h"
#include "TXTParser.h"
#include "CSVParser.h"

using namespace std;

ParserFactory::ParserFactory() {
	this->parsers.push_back(unique_ptr<Parser>(new XMLParser()));
	this->parsers.push_back(unique_ptr<Parser>(new TXTParser()));
	this->parsers.push_back(unique_ptr<Parser>(new CSVParser()));
}

Parser & ParserFactory::get_parser(FileReader & file) {
	unsigned int best_score = 0;
	Parser * best_strategy = nullptr;
	for (auto & parser : this->parsers) {
		parser->set_file(file);
		unsigned int score = parser->heuristic();
		if (score <= best_score) continue;

		best_score = score;
		best_strategy = parser.get();
	}

	if (best_strategy == nullptr)
		throw Exception("ParserFactory: unknown file type");

	return *best_strategy;
}