#pragma once

#include <cstdlib>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>


namespace relpipe {
namespace in {
namespace cli {

class Command {
public:
	virtual ~Command() = default;

	/**
	 * Processes the inputs (stream + arguments) and generates output in the relational pipes format.
	 * 
	 * @param input usually STDIN, may not be used if all data are passed as CLI arguments
	 * @param output usually STDOUT, relational data is passed here
	 * @param command command name, usualy not needed, may be significant if the same Command instance is used for several commands
	 * @param arguments CLI arguments containing data or parameters (format is specific to each command)
	 */
	virtual void process(std::istream& input, std::ostream& output, const relpipe::writer::string_t& command, const std::vector<relpipe::writer::string_t> &arguments) = 0;

};

}
}
}