/*

 * 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.

 */

import java.io.*;

import java.text.*;

import java.util.*;

import java.util.regex.*;

public class PropertiesTest {

    public static void main(String[] args) throws Exception {

        if (args.length == 2 && args[0].equals("-d")) {

            dump(args[1]);

        } else if (args.length == 4 && args[0].equals("-c")) {

            compare(args[1], args[2], args[3]);

        } else {

            System.err.println("Usage:  java PropertiesTest -d <dumpfile>");

            System.err.println("        java PropertiesTest -c <beforedump> <afterdump> <propsfile>");

            System.exit(-1);

        }

    }

    private static void dump(String outfile) {

        File f = new File(outfile);

        PrintWriter pw;

        try {

            f.createNewFile();

            pw = new PrintWriter(f);

        } catch (Exception fnfe) {

            throw new RuntimeException(fnfe);

        }

        for (char c1 = 'A'; c1 <= 'Z'; c1++) {

            for (char c2 = 'A'; c2 <= 'Z'; c2++) {

                String ctry = new StringBuilder().append(c1).append(c2).toString();

                try {

                    Currency c = Currency.getInstance(new Locale("", ctry));

                    if (c != null) {

                        pw.printf(Locale.ROOT, "%s=%s,%03d,%1d\n",

                            ctry,

                            c.getCurrencyCode(),

                            c.getNumericCode(),

                            c.getDefaultFractionDigits());

                    }

                } catch (IllegalArgumentException iae) {

                    // invalid country code

                    continue;

                }

            }

        }

        pw.flush();

        pw.close();

    }

    private static void compare(String beforeFile, String afterFile, String propsFile)

        throws IOException

    {

        // load file contents

        Properties before = new Properties();

        try (Reader reader = new FileReader(beforeFile)) {

            before.load(reader);

        }

        Properties after = new Properties();

        try (Reader reader = new FileReader(afterFile)) {

            after.load(reader);

        }

        // remove the same contents from the 'after' properties

        Set<String> keys = before.stringPropertyNames();

        for (String key: keys) {

            String beforeVal = before.getProperty(key);

            String afterVal = after.getProperty(key);

            System.out.printf("Removing country: %s. before: %s, after: %s", key, beforeVal, afterVal);

            if (beforeVal.equals(afterVal)) {

                after.remove(key);

                System.out.printf(" --- removed\n");

            } else {

                System.out.printf(" --- NOT removed\n");

            }

        }

        // now look at the currency.properties

        Properties p = new Properties();

        try (Reader reader = new FileReader(propsFile)) {

            p.load(reader);

        }

        // test each replacements

        keys = p.stringPropertyNames();

        Pattern propertiesPattern =

            Pattern.compile("([A-Z]{3})\\s*,\\s*(\\d{3})\\s*,\\s*" +

                "(\\d+)\\s*,?\\s*(\\d{4}-\\d{2}-\\d{2}T\\d{2}:" +

                "\\d{2}:\\d{2})?");

        for (String key: keys) {

            String val = p.getProperty(key);

            try {

                if (countOccurrences(val, ',') == 3 && !isPastCutoverDate(val)) {

                    System.out.println("Skipping since date is in future");

                    continue; // skip since date in future (no effect)

                }

            } catch (ParseException pe) {

                // swallow - currency class should not honour this value

                continue;

            }

            String afterVal = after.getProperty(key);

            System.out.printf("Testing key: %s, val: %s... ", key, val);

            System.out.println("AfterVal is : " + afterVal);

            Matcher m = propertiesPattern.matcher(val.toUpperCase(Locale.ROOT));

            if (!m.find()) {

                // format is not recognized.

                System.out.printf("Format is not recognized.\n");

                if (afterVal != null) {

                    throw new RuntimeException("Currency data replacement for "+key+" failed: It was incorrectly altered to "+afterVal);

                }

                // ignore this

                continue;

            }

            String code = m.group(1);

            int numeric = Integer.parseInt(m.group(2));

            int fraction = Integer.parseInt(m.group(3));

            if (fraction > 9) {

                System.out.println("Skipping since the fraction is greater than 9");

                continue;

            }

            Matcher mAfter = propertiesPattern.matcher(afterVal);

            mAfter.find();

            String codeAfter = mAfter.group(1);

            int numericAfter = Integer.parseInt(mAfter.group(2));

            int fractionAfter = Integer.parseInt(mAfter.group(3));

            if (code.equals(codeAfter) &&

                (numeric == numericAfter)&&

                (fraction == fractionAfter)) {

                after.remove(key);

            } else {

                throw new RuntimeException("Currency data replacement for "+key+" failed: actual: (alphacode: "+codeAfter+", numcode: "+numericAfter+", fraction: "+fractionAfter+"), expected:  (alphacode: "+code+", numcode: "+numeric+", fraction: "+fraction+")");

            }

            System.out.printf("Success!\n");

        }

        if (!after.isEmpty()) {

            StringBuilder sb = new StringBuilder()

                .append("Currency data replacement failed.  Unnecessary modification was(were) made for the following currencies:\n");

            keys = after.stringPropertyNames();

            for (String key : keys) {

                sb.append("    country: ")

                .append(key)

                .append(" currency: ")

                .append(after.getProperty(key))

                .append("\n");

            }

            throw new RuntimeException(sb.toString());

        }

    }

    private static boolean isPastCutoverDate(String s)

            throws IndexOutOfBoundsException, NullPointerException, ParseException {

        String dateString = s.substring(s.lastIndexOf(',')+1, s.length()).trim();

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", Locale.ROOT);

        format.setTimeZone(TimeZone.getTimeZone("GMT"));

        format.setLenient(false);

        long time = format.parse(dateString).getTime();

        if (System.currentTimeMillis() - time >= 0L) {

            return true;

        } else {

            return false;

        }

    }

    private static int countOccurrences(String value, char match) {

        int count = 0;

        for (char c : value.toCharArray()) {

            if (c == match) {

               ++count;

            }

        }

        return count;

    }

}