/**

 * Relational pipes

 * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)

 *

 * This program 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, version 3.

 *

 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.

 */

#include <cstdio>

#include <cstdlib>

#include <memory>

#include <functional>

#include <regex>

#include <relpipe/cli/CLI.h>

#include <relpipe/cli/RelpipeCLIException.h>

#include <relpipe/reader/Factory.h>

#include <relpipe/reader/RelationalReader.h>

#include <relpipe/reader/RelpipeReaderException.h>

#include <relpipe/writer/RelationalWriter.h>

#include <relpipe/writer/RelpipeWriterException.h>

#include <relpipe/writer/Factory.h>

#include <relpipe/writer/TypeId.h>

#include "SqlHandler.h"

#include "CLIParser.h"

#include "Configuration.h"

#include "DriverManager.h"

using namespace relpipe::cli;

using namespace relpipe::reader;

using namespace relpipe::tr::sql;

int main(int argc, char**argv) {

	setlocale(LC_ALL, "");

	CLI::untieStdIO();

	CLI cli(argc, argv);

	int resultCode = CLI::EXIT_CODE_UNEXPECTED_ERROR;

	try {

		CLIParser cliParser;

		Configuration configuration = cliParser.parse(cli.arguments());

		std::shared_ptr<DriverManager> driverManager = std::make_shared<DriverManager>();

		std::shared_ptr<writer::RelationalWriter> writer(writer::Factory::create(std::cout));

		if (configuration.listDataSources) {

			// --list-data-sources:

			SqlHandler::listDataSources(writer.get(), driverManager.get());

		} else if (std::regex_match(cli.programName(), std::wregex(L"^(.*/)?relpipe-in-sql$"))) {

			// relpipe-in-sql:

			if (configuration.statements.size() == 0 && configuration.copyRelations.size() == 0) configuration.copyRelations.push_back({L".*", L"", false});

			configuration.sqlBeforeRelational = isatty(fileno(stdin)) ? nullptr : &std::wcin;

			configuration.sqlAfterRelational = nullptr;

			SqlHandler handler(writer.get(), driverManager.get(), configuration);

			handler.endOfPipe();

		} else {

			// relpipe-tr-sql:

			std::shared_ptr<reader::RelationalReader> reader(reader::Factory::create(std::cin));

			SqlHandler handler(writer.get(), driverManager.get(), configuration);

			reader->addHandler(&handler);

			reader->process();

		}

		resultCode = CLI::EXIT_CODE_SUCCESS;

	} catch (RelpipeCLIException& e) {

		fwprintf(stderr, L"Caught CLI exception: %ls\n", e.getMessge().c_str());

		fwprintf(stderr, L"Debug: Input stream: eof=%ls, lastRead=%d\n", (cin.eof() ? L"true" : L"false"), cin.gcount());

		resultCode = e.getExitCode();

	} catch (SqlException& e) {

		fwprintf(stderr, L"Caught SQL exception: %ls\n", e.getMessage().c_str());

		for (SqlException::SqlDiagnosticsRecord dr : e.getDiagnostics()) {

			fwprintf(stderr, L"\tstate: %ls, code: %d, message: %ls\n", dr.sqlState.c_str(), dr.sqlCode, dr.message.c_str());

		}

		fwprintf(stderr, L"Debug: Input stream: eof=%ls, lastRead=%d\n", (cin.eof() ? L"true" : L"false"), cin.gcount());

		resultCode = CLI::EXIT_CODE_UNEXPECTED_ERROR;

	} catch (RelpipeReaderException& e) {

		fwprintf(stderr, L"Caught Reader exception: %ls\n", e.getMessge().c_str());

		fwprintf(stderr, L"Debug: Input stream: eof=%ls, lastRead=%d\n", (cin.eof() ? L"true" : L"false"), cin.gcount());

		resultCode = CLI::EXIT_CODE_DATA_ERROR;

	}

	return resultCode;

}