/*
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * This source code is provided to illustrate the usage of a given feature
 * or technique and has been deliberately simplified. Additional steps
 * required for a production-quality application, such as security checks,
 * input validation and proper error handling, might not be present in
 * this sample code.
 */

package comparator;

import java.util.Arrays;
import java.util.Random;
import static java.util.stream.Collectors.joining;

public class Test {
    private final static Random random = new Random();

    /**
     * Simple case: sorting 1 .. 11
     */
    private static String[] source1() {
        return new String[] {
                "java 1",
                "java 2",
                "java 3",
                "java 4",
                "java 5",
                "java 6",
                "java 7",
                "java 8",
                "java 9",
                "java 10",
                "java 11",
            };
    }

    /**
     * Leading zeros and multiple numeric parts
     */
    private static String[] source2() {
        return new String[] {
                "string",
                "string0",
                "string00",
                "string1",
                "string01",
                "string001",
                "string2",
                "string02",
                "string002",
                "string002.a",
                "string002.a0",
                "string002.a1",
                "string0002",
                "string0002",
            };
    }

    /**
     * Sample from MSDN
     */
    private static String[] source3() {
        return new String[] {
                "2string",
                "3string",
                "20string",
                "st2ring",
                "st3ring",
                "st20ring",
                "string2",
                "string3",
                "string20",
            };
    }

    /**
     * Fullwidth characters
     */
    private static String[] source4() {
        return new String[] {
                "ｓｔｒｉｎｇ ０",
                "ｓｔｒｉｎｇ ００",
                "ｓｔｒｉｎｇ ０００",
                "ｓｔｒｉｎｇ １",
                "ｓｔｒｉｎｇ ０１",
                "ｓｔｒｉｎｇ ２",
                "ｓｔｒｉｎｇ ３",
                "ｓｔｒｉｎｇ ４",
                "ｓｔｒｉｎｇ ５",
                "ｓｔｒｉｎｇ ６",
                "ｓｔｒｉｎｇ ７",
                "ｓｔｒｉｎｇ ８",
                "ｓｔｒｉｎｇ ９",
                "ｓｔｒｉｎｇ １０",
                "ｓｔｒｉｎｇ １１",
                "ｓｔｒｉｎｇ １２",
            };
    }

    public static void main(String[] args) throws Exception {
        test(source1());
        test(source2());
        test(source3());
        test(source4());
        System.out.println("Okay");
    }

    private static void test(String[] strings) throws Exception {
        String[] shuffled = (String[])strings.clone();
        for (int i = 0; i < shuffled.length - 1; ++i) {
            int j = i + random.nextInt(shuffled.length - i);
            String tmp = shuffled[i];
            shuffled[i] = shuffled[j];
            shuffled[j] = tmp;
        }

        Arrays.sort(shuffled, new AlphaNumericComparator());

        for (int i = 0; i < strings.length - 1; ++i) {
            if (!strings[i].equals(shuffled[i])) {
                throw new Exception("Wrong sorting order!\n" +
                        Arrays.stream(shuffled).collect(joining("\n")));
            }
        }
    }
}