<project name="MathThemRight" default="build">

  <property environment="env"/>

  <property name="build" value="build" />
  <property name="classes" value="${build}/classes" />
  <property name="src" value="src" />
  <property name="rsrc" value="rsrc" />
  <property name="midp_rsrc" value="${rsrc}/midp" />
  <property name="bundle" value="${build}/bundle" />
  <property name="preverified" value="${build}/preverified" />
  <property name="bin" value="bin" />
  <property name="midp_bin" value="${midp}/bin" />
  <property name="targets" value="targets" />
  <property name="javadoc" value="doc/javadoc" />
  <property name="javadoc_rsrc" value="${rsrc}/javadoc" />

  <property name="midp" value="." />

  <property name="java_cmd" value="${env.JAVA_6_CMD}" />
  <property name="sdk_location" value="${env.NOKIA_SERIES40_SDK}" />

  <property name="preverify" value="${env.NOKIA_SERIES40_SDK_PREVERIFY}" />

  <description>
   Math Them Right MIDlet java build project file
  </description>


  <target name="clean">
    <delete dir="${bin}" />
  </target>

  <target name="cleanSrc" description="deletes all class files from src folder">
    <delete>
      <fileset dir="${src}" includes="**/*.class"/>
    </delete>
  </target>


  <target name="build" description="clean, compile and build">
    <antcall target="clean" />
    <antcall target="compile" />
    <antcall target="preverify" />
    <antcall target="package" />
  </target>

  <target name="compile">

    <mkdir dir="${classes}" />
    <javac destDir="${classes}" srcDir="${src}" source="1.4" target="1.4" classpathref="project.class.path" includeAntRuntime="no" includeJavaRuntime="no" fork="yes" executable="${java_cmd}">
  <bootclasspath>
          <fileset dir="${sdk_location}/lib">
          <include name="**/*.jar"/>
    <include name="**/*.zip"/>
          </fileset>
    </bootclasspath>


   </javac>
   <copy todir="${classes}">
      <fileset dir="${src}" excludes="**/*.java"/>
    </copy>
  </target>


<path id="project.class.path">
  <fileset dir="${sdk_location}/lib">
             <include name="**/*.jar"/>
             <include name="**/*.zip"/>
          </fileset>
  </path>

 <property name="myclasspath" refid="project.class.path"/>

  <target name="preverify">

    <mkdir dir="${preverified}"/>
    <exec executable="${preverify}"  failonerror="true">

      <arg line="-classpath ${myclasspath}"/>
      <arg line="-d ${preverified}"/>
      <arg line="${classes}"/>
    </exec>
    <copy todir="${preverified}"  failonerror="false">
      <fileset dir="${src}" excludes="**/*.java"/>
    </copy>
  </target>

  <target name="package">
    <mkdir dir="${bin}" />
      <jar basedir="${preverified}" jarfile="${bin}/${ant.project.name}.jar"
      manifest="${midp_rsrc}/MANIFEST.MF" compress="true">
      </jar>

    <length file="${bin}/${ant.project.name}.jar" property="length.jarfile" />
    <copy file="${midp_rsrc}/${ant.project.name}.jad" toDir="${bin}" />
    <replace file="${bin}/${ant.project.name}.jad" token="@@@" value="${length.jarfile}"/>

  </target>

</project>

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package com.foxelyss.maththemright;
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import java.io.InputStream;
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import java.util.Random;
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import javax.microedition.lcdui.*;
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import javax.microedition.media.Manager;
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import javax.microedition.media.Player;
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import javax.microedition.midlet.MIDlet;
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import javax.microedition.midlet.MIDletStateChangeException;
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public class Game extends MIDlet implements CommandListener {
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    private static final String START_FORM_TITLE = "Math Them Right";
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    private static final String START_MESSAGE = "Пожалуйста нажмите Далее";
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    private static final String CONTENT_TYPE = "audio/x-wav";
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    private static final String WIN_SOUND = "/com/foxelyss/maththemright/res/win.wav";
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    private static final String LOSE_SOUND = "/com/foxelyss/maththemright/res/lose.wav";
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    Display display;
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    ChoiceGroup answers;
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    Command startCommand = new Command("Далее", Command.OK, 1);
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    Command exitCommand = new Command("Выход", Command.EXIT, 2);
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    Player win_player;
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    Player lose_player;
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    InputStream win_sound_stream;
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    InputStream lose_sound_stream;
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    Form startForm;
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    int win_strike = 0;
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    int right_answer_index = -3;
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    public Game() {
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        display = Display.getDisplay(this);
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    }
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    public void startApp() throws MIDletStateChangeException {
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        initAudio();
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        startForm = new Form(START_FORM_TITLE);
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        startForm.append(START_MESSAGE);
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        startForm.addCommand(startCommand);
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        startForm.addCommand(exitCommand);
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        startForm.setCommandListener(this);
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        answers = new ChoiceGroup("Ответы", Choice.EXCLUSIVE);
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        startForm.append(answers);
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        display.setCurrent(startForm);
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    }
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    public void pauseApp() {
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    }
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    public void destroyApp(boolean unconditional) {
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        try {
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            win_player.stop();
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            lose_player.stop();
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            win_player = null;
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            lose_player = null;
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        } catch (Exception e) {
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            e.printStackTrace();
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        }
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    }
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    void initAudio() {
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        try {
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            win_sound_stream = getClass().getResourceAsStream(WIN_SOUND);
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            lose_sound_stream = getClass().getResourceAsStream(LOSE_SOUND);
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            win_player = Manager.createPlayer(win_sound_stream, CONTENT_TYPE);
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            win_player.realize();
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            win_player.prefetch();
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            lose_player = Manager.createPlayer(lose_sound_stream, CONTENT_TYPE);
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            lose_player.realize();
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            lose_player.prefetch();
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        } catch (Exception e) {
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            e.printStackTrace();
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        }
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    }
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    public void commandAction(Command c, Displayable d) {
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        if (c == startCommand) {
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            if (checkAnswer()) {
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                win_strike++;
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                try {
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                    win_player.start();
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                } catch (Exception e) {
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                }
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            } else {
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                win_strike = 0;
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                try {
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                    lose_player.start();
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                } catch (Exception e) {
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                }
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            }
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            generateExercise();
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        } else if (c == exitCommand) {
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            destroyApp(true);
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            notifyDestroyed();
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        }
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    }
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    public boolean checkAnswer() {
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        return right_answer_index == answers.getSelectedIndex();
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    }
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    public void generateExercise() {
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        Random random = new Random();
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        int a = random.nextInt(200);
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        int b = random.nextInt(200);
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        int operation = random.nextInt(4);
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        int right_result = a / b;
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        char operand = '/';
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        switch (operation) {
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            case 0:
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                operand = '+';
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                right_result = a + b;
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                break;
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            case 1:
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                operand = '-';
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                right_result = a - b;
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                break;
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            case 2:
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                operand = '*';
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                right_result = a * b;
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                break;
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        }
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        String question = a + " " + operand + " " + b + "\t=";
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        ((StringItem) startForm.get(0)).setText(question + "\n" + "Серия побед:\t" + win_strike);
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        right_answer_index = random.nextInt(4);
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        answers.deleteAll();
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        for (int i = 0; i < 4; i++) {
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            int offset = random.nextInt(24);
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            String answer = "" + right_result;
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            if (i != right_answer_index) {
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                answer = (right_result + (offset < 12 ? -1 * (1 + offset) : offset)) + "";
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            }
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            answers.append(answer, null);
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        }
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    }
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}