/*
 * Copyright 2012-2017 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat 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; either version 2, or (at your
 * option) any later version.
 *
 * Thermostat 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 Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.common.swaggercombine;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;

public class SwaggerCombineMain {

    /**
     * command line Main method
     * @param args command line arguments
     *             [--yaml] [--json [--pretty]] [--lint] [--use-template] [--quiet] [--help] infile1 [infile2] ...
     * @throws IOException if "--throws" set and there was an error
     */
    public static void main(String[] args) throws IOException {

        SwaggerCombineContext ctx = null;
        try {
            final SwaggerCombine combine = new SwaggerCombine();
            ctx = new SwaggerCombineContextBuilder().buildContext(args);
            if (ctx.printUsage()) {
                System.err.println("SwaggerCombine [--yaml] [--json [--pretty]] [--lint] [--output=filename|-] [--use-template] [--quiet] [--help] [--throw] [@argfile] infile1 [infile2] ...");
            } else if (ctx.getOutputFile() == null) {
                final Writer out = new BufferedWriter(new PrintWriter(System.out));
                combine.run(ctx, out);
            } else if (ctx.getOutputFile().isEmpty()) {
                combine.run(ctx);
            } else {
                final Writer out = new BufferedWriter(new FileWriter(ctx.getOutputFile()));
                combine.run(ctx, out);
                out.close();
            }
        } catch (Exception e) {
            // there's a chance the exception was thrown while parsing arguments,
            // but before parsing any '--throw'.  Run a quick check
            boolean rethrow = ctx != null && ctx.isThrowExceptions();
            for (final String arg : args) {
                if ("--throw".equals(arg)) {
                    rethrow = true;
                    break;
                }
            }
            if (rethrow) {
                throw e;
            } else {
                e.printStackTrace();
            }
        }
    }
}