/*

 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sampleapi;

public class SampleApiDefaultRunner {

    public static final String MSG_NO_OUTDIR =

        "SampleApi: no outdir set";

    public static final String MSG_NO_RESDIR =

        "SampleApi: no resourcedir set";

    public static final String MSG_DUP_OUTDIR =

        "SampleApi: duplicated outdir detected: ";

    public static final String MSG_DUP_RESDIR =

        "SampleApi: duplicated resourcedir detected: ";

    public static final String MSG_USE_FIRST =

        "           will use first occurance: ";

    public static final String MSG_INVAL_OUTDIR =

        "SampleApi: outdir is not valid: ";

    public static final String MSG_INVAL_RESDIR =

        "SampleApi: outdir is not valid: ";

    public static final String MSG_CANNOT_GEN =

        "SampleApi: cannot generate output: ";

    public static final String MSG_WRONG_OPTION =

        "SampleApi: incorrect option: ";

    public static final String MSG_USE_HELP =

        "           use -? for help";

    public static final String[] MSG_HELP = {

        "SampleApi options:",

        "    -?|-h|--help                                 - print help",

        "    -r=<dir>|--resdir=<dir>|--resourcedir=<dir>  - set <dir> to find xml resources",

        "    -o=<dir>|--outdir=<dir>                      - set <dir> to generate output"

    };

    public static void main(String... args) throws Exception {

        System.exit(execute(args));

    }

    public static int execute(String... args) throws Exception {

        if (args.length == 0) {

            printHelp();

            return 1;

        }

        String outDirName = "";

        String resDirName = "";

        boolean isOutDirSet = false;

        boolean isResDirSet = false;

        boolean isHelpPrinted = false;

        for (String arg : args) {

            Option option = new Option(arg);

            switch (option.getOptionName()) {

                case "-?":

                case "-h":

                case "--help":

                    if (!isHelpPrinted) {

                        printHelp();

                        isHelpPrinted = true;

                    }

                    break;

                case "-o":

                case "--outdir":

                    if (!isOutDirSet) {

                        outDirName = option.getOptionValue();

                        isOutDirSet = true;

                    } else {

                        System.err.println(MSG_DUP_OUTDIR + option.getOptionValue());

                        System.err.println(MSG_USE_FIRST + outDirName);

                    }

                    break;

                case "-r":

                case "--resdir":

                case "--resourcedir":

                    if (!isResDirSet) {

                        resDirName = option.getOptionValue();

                        isResDirSet = true;

                    } else {

                        System.err.println(MSG_DUP_RESDIR + option.getOptionValue());

                        System.err.println(MSG_USE_FIRST + resDirName);

                    }

                    break;

                default:

                    System.err.println(MSG_WRONG_OPTION + arg);

                    System.err.println(MSG_USE_HELP);

                    break;

            }

        }

        if (!isOutDirSet) {

            System.err.println(MSG_NO_OUTDIR);

            return 1;

        }

        if (outDirName.length() == 0) {

            System.err.println(MSG_INVAL_OUTDIR + outDirName);

            return 1;

        }

        if (!isResDirSet) {

            System.err.println(MSG_NO_RESDIR);

            return 1;

        }

        if (resDirName.length() == 0) {

            System.err.println(MSG_INVAL_RESDIR + resDirName);

            return 1;

        }

        SampleApi apiGen = new SampleApi();

        return 0;

    }

    private static void printHelp() {

        for (String line : MSG_HELP)

            System.out.println(line);

    }

    private static class Option {

        private final String optionName;

        private final String optionValue;

        public Option(String arg) {

            int delimPos = arg.indexOf('=');

            if (delimPos == -1) {

                optionName = arg;

                optionValue = "";

            } else {

                optionName = arg.substring(0, delimPos);

                optionValue = arg.substring(delimPos + 1, arg.length());

            }

        }

        public String getOptionName() {

            return optionName;

        }

        public String getOptionValue() {

            return optionValue;

        }

    }

}