#include <string>

#include <locale>

#include "CLI.h"

#include "RelpipeCLIException.h"

/**

 * TODO: consider code merge with ArgumentsCommand

 */

class StdInCommand : public Command {

private:

	wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.

	/**

	 * Reads next value from arguments and (if no arguments left) from input

	 * @param input

	 * @param arguments

	 * @param i current index in the arguments vector

	 * @param required if true, exception is thrown when no data found

	 * @return 

	 */

	relpipe::writer::string_t readNext(std::istream& input, const std::vector<relpipe::writer::string_t>& arguments, size_t& i, relpipe::writer::boolean_t required) {

		using namespace relpipe::writer;

		using namespace relpipe::cli;

		if (i < arguments.size()) {

			return arguments[i++];

		} else {

			std::stringstream value;

			while (true) {

				char ch;

				input.get(ch);

				if (ch == 0 || input.eof() || input.fail()) break;

				else value << ch;

			}

			return convertor.from_bytes(value.str());

		}

	}

		string_t relationName = readNext(input, arguments, i, true);

		integer_t attributeCount = std::stoul(readNext(input, arguments, i, true)); // TODO: use integer data type's method?

			string_t attributeName = readNext(input, arguments, i, true);

			TypeId attributeType = writer->toTypeId(readNext(input, arguments, i, true));

		while (true) {

			string_t value = readNext(input, arguments, i, false);

			if (value.empty() && (input.eof() || input.fail())) break;

			else writer->writeAttribute(value);