/*

 * Copyright (c) 2014, 2018, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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 propertiesparser;

import propertiesparser.parser.MessageFile;

import propertiesparser.gen.ClassGenerator;

import java.io.File;

import java.io.PrintStream;

import java.util.TreeMap;

import java.util.Map;

/** Translates a .properties file into a .java file containing an enum-like Java class

 *  which defines static factory methods for all resource keys in a given resource file. <P>

 *

 *  Usage: java PropertiesParser -compile [path to .properties file] [output folder where .java file will be written]

 *

 * @author mcimadamore

 */

public class PropertiesParser {

    public Logger logger;

    public PropertiesParser(Logger logger) {

        this.logger = logger;

    }

    public static void main(String[] args) {

        boolean ok = run(args, System.out);

        if ( !ok ) {

            System.exit(1);

        }

    }

    public static boolean run(String[] args, PrintStream out) {

        PropertiesParser pp = new PropertiesParser(out::println);

        return pp.run(args);

    }

    public static interface Logger {

        void info(String msg);

    }

    public void info(String msg) {

        logger.info(msg);

    }

    public boolean run(String[] args) {

        Map<String, String> optionsMap = parseOptions(args);

        if (optionsMap.isEmpty()) {

            usage();

            return false;

        }

        try {

            optionsMap.forEach(this::compilePropertyFile);

            return true;

        } catch (RuntimeException ex) {

            ex.printStackTrace();

            return false;

        }

    }

    private void compilePropertyFile(String propertyPath, String outPath) {

        try {

            File propertyFile = new File(propertyPath);

            String prefix = propertyFile.getName().split("\\.")[0];

            MessageFile messageFile = new MessageFile(propertyFile, prefix);

            new ClassGenerator().generateFactory(messageFile, new File(outPath));

        } catch (Throwable ex) {

            throw new RuntimeException(ex);

        }

    }

    private Map<String, String> parseOptions(String args[]) {

        /* Use TreeMap to guarantee stable forEach iteration */

        Map<String, String> optionsMap = new TreeMap<>();

        for ( int i = 0; i < args.length ; i++ ) {

            if ( "-compile".equals(args[i]) && i+2 < args.length ) {

                optionsMap.put(args[++i], args[++i]);

            } else {

                return new TreeMap<>();

            }

        }

        return optionsMap;

    }

    private void usage() {

        info("usage:");

        info("    java PropertiesParser {-compile path_to_properties_file path_to_java_output_dir}");

        info("");

        info("Example:");

        info("    java PropertiesParser -compile resources/test.properties resources");

    }

}