/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * This program 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, version 2 of the License.

 *

 * This program 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 this program. Look for COPYING file in the top folder.

 * If not, see http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.vm4brwsr;

import java.io.UnsupportedEncodingException;

import org.apidesign.bck2brwsr.core.JavaScriptBody;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

public class StringSample {

    public static final String HELLO = "Hello World!";

    private static int counter;

    private final int cnt;

    public StringSample() {

        cnt = ++counter;

    }

    public static char sayHello(int indx) {

        return HELLO.charAt(indx);

    }

    public static boolean equalToHello(int from, int to) {

        return "Hello".equals(HELLO.substring(from, to));

    }

    public static String fromChars(char a, char b, char c) {

        char[] arr = { a, b, c };

        return new String(arr).toString();

    }

    public static String charsFromNumbers() {

        return chars((char)65, (char)66, (char)67);

    }

    public static String charsFromChars() {

        return chars('A', 'B', 'C');

    }

    public static String chars(char a, char b, char c) {

        return ("" + a + b +c).toString();

    }

    public static String replace(String s, char a, char b) {

        return s.replace(a, b);

    }

    public static int hashCode(String h) {

        return h.hashCode();

    }

    public static boolean isStringInstance() {

        return chars('a', (char)30, 'b') instanceof String;

    }

    public static String getBytes(String s) throws UnsupportedEncodingException {

        byte[] arr = s.getBytes("UTF-8");

        StringBuilder sb = new StringBuilder();

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

            sb.append(arr[i]).append(" ");

        }

        return sb.toString().toString();

    }

    public static String insertBuffer() {

        StringBuilder sb = new StringBuilder();

        sb.append("Jardo!");

        sb.insert(0, "Ahoj ");

        sb.delete(4, 8);

        return sb.toString().toString();

    }

    public static int countAB(String txt) {

        int cnt = 0;

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

            switch (txt.charAt(i)) {

                case 'A': cnt++; break;

                case 'B': cnt += 2; break;

            }

        }

        return cnt;

    }

    public static int stringSwitch(String txt) {

        switch (txt) {

            case "jedna": return 1;

            case "dve": return 2;

            case "tri": return 3;

            case "ctyri": return 4;

        }

        return -1;

    }

    public static String toStringTest(int howMuch) {

        counter = 0;

        StringSample ss = null;

        for (int i = 0; i < howMuch; i++) {

            ss = new StringSample();

        }

        return ss.toString().toString();

    }

    public static String concatStrings() {

        return (toStringTest(1) + "\\\n\r\t").toString();

    }

    public static int compare(String a, String b) {

        return a.compareTo(b);

    }

    @Override

    public String toString() {

        return HELLO + cnt;

    }

    @JavaScriptBody(args = {}, body = "return [1, 2];")

    private static native Object crtarr();

    @JavaScriptBody(args = { "o" }, body = "return o.valueOf();")

    private static native String valueOf(Object o);

    public static String toStringArray(boolean fakeArr, boolean toString) {

        final Object arr = fakeArr ? crtarr() : new Object[2];

        final String whole = toString ? arr.toString() : valueOf(arr);

        int zav = whole.indexOf('@');

        assert zav >= 0 : "There should be @ in: " + whole;

        return whole.substring(0, zav).toString().toString();

    }

}