/**
 * 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 (cli.arguments().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;
}