/**

 * 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.IOException;

import java.lang.annotation.Annotation;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.reflect.Method;

import java.net.MalformedURLException;

import org.apidesign.bck2brwsr.core.JavaScriptBody;

/**

 *

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

 */

@ClassesMarker(number = 10, nicknames = { "Ten", "Deset" }, count = ClassesMarker.E.TWO, subs = {

    @ClassesMarker.Anno(Integer.SIZE),

    @ClassesMarker.Anno(Integer.MIN_VALUE)

})

@ClassesNamer(name = "my text", anno = @ClassesMarker.Anno(333))

public class Classes {

    public static String nameOfIO() {

        return nameFor(IOException.class);

    }

    private static String nameFor(Class<?> c) {

        return c.getName();

    }

    private static final Class<?> PRELOAD = Runnable.class;

    public static boolean isInterface(String s) throws ClassNotFoundException {

        return Class.forName(s).isInterface();

    }

    public static boolean equalsClassesOfExceptions() {

        return MalformedURLException.class.getSuperclass() == IOException.class;

    }

    public static boolean differenceInClasses() {

        Class<?> c1 = MalformedURLException.class;

        Class<?> c2 = IOException.class;

        return c1 != c2;

    }

    public static String classForInstance() {

        return new IOException().getClass().getName().toString();

    }

    @ClassesMarker(number = 1, nicknames = { "One", "Jedna" } )

    public static String name() {

        return IOException.class.getName().toString();

    }

    public static String simpleName() {

        return IOException.class.getSimpleName();

    }

    public static String canonicalName() {

        return IOException.class.getCanonicalName();

    }

    public static String objectName() throws NoSuchMethodException {

        return IOException.class.getMethod("wait").getDeclaringClass().getName();

    }

    public static boolean newInstance() throws Exception {

        IOException ioe = IOException.class.newInstance();

        if (ioe instanceof IOException) {

            return ioe.getClass() == IOException.class;

        }

        throw new IllegalStateException("Not a subtype: " + ioe);

    }

    public static String newInstanceNoPubConstructor() throws Exception {

        try {

            Float f = Float.class.newInstance();

            return "wrong, can't instantiate: " + f;

        } catch (Exception ex) {

            return (ex.getClass().getName() + ":" + ex.getMessage()).toString().toString();

        }

    }

    public static int getMarker() {

        if (!Classes.class.isAnnotationPresent(ClassesMarker.class)) {

            return -2;

        }

        ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);

        assert cm instanceof Object : "Is object " + cm;

        assert cm instanceof Annotation : "Is annotation " + cm;

        assert !((Object)cm instanceof Class) : "Is not Class " + cm;

        return cm == null ? -1 : cm.number();

    }

    public static String getMarkerNicknames() {

        ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);

        if (cm == null) {

            return null;

        }

        final Object[] arr = cm.nicknames();

        assert arr instanceof Object[] : "Instance of Object array: " + arr;

        assert arr instanceof String[] : "Instance of String array: " + arr;

        assert !(arr instanceof Integer[]) : "Not instance of Integer array: " + arr;

        StringBuilder sb = new StringBuilder();

        for (String s : cm.nicknames()) {

            sb.append(s).append("\n");

        }

        return sb.toString().toString();

    }

    @Retention(RetentionPolicy.CLASS)

    @interface Ann {

    }

    public static String getRetention() throws Exception {

        Retention r = Ann.class.getAnnotation(Retention.class);

        assert r != null : "Annotation is present";

        assert r.value() == RetentionPolicy.CLASS : "Policy value is OK: " + r.value();

        return r.annotationType().getName();

    }

    public static String getMarkerE() {

        ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);

        if (cm == null) {

            return null;

        }

        return cm.count().name();

    }

    public static String getNamer(boolean direct) {

        if (direct) {

            ClassesNamer cm = Classes.class.getAnnotation(ClassesNamer.class);

            return cm == null ? null : cm.name();

        }

        for (Annotation a : Classes.class.getAnnotations()) {

            if (a instanceof ClassesNamer) {

                return ((ClassesNamer)a).name();

            }

        }

        return null;

    }

    public static int getInnerNamer() {

        ClassesNamer cm = Classes.class.getAnnotation(ClassesNamer.class);

        assert cm != null : "ClassesNamer is present";

        return cm.anno().value();

    }

    public static int getInnerNamers() {

        ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);

        assert cm != null : "ClassesNamer is present";

        int sum = 0;

        for (ClassesMarker.Anno anno : cm.subs()) {

            sum += anno.value();

        }

        return sum;

    }

    public static String intType() {

        return Integer.TYPE.getName();

    }

    public static int primitive() {

        return 1;

    }

    public static boolean primitiveB() {

        return true;

    }

    public static String primitiveType(String method) throws Exception {

        return reflectiveMethodCall(false, method).getClass().getName();

    }

    @JavaScriptBody(args = "msg", body = "throw msg;")

    private static native void thrw(String msg);

    public static Object reflectiveMethodCall(boolean direct, String mn) throws Exception {

        Method find = null;

        StringBuilder sb = new StringBuilder();

        if (!direct) {

            final Class<? extends Annotation> v = ClassesMarker.class;

            for (Method m : Classes.class.getMethods()) {

                sb.append("\n").append(m.getName());

                if (mn != null) {

                    if (m.getName().equals(mn)) {

                        find = m;

                        break;

                    }

                } else {

                    if (m.getAnnotation(v) != null) {

                        find = m;

                        break;

                    }

                }

            }

        } else {

            find = Classes.class.getMethod(mn);

        }

        if (find == null) {

            thrw(sb.toString());

            throw new NullPointerException(sb.toString());

        }

        return find.invoke(null);

    }

    public static int reflectiveSum(int a, int b) throws Exception {

        Method m = StaticMethod.class.getMethod("sum", int.class, int.class);

        return (int) m.invoke(null, a, b);

    }

    private abstract class Application {

        public abstract int getID();

    }

    private class MyApplication extends Application {

        @Override

        public int getID() {

            return 1;

        }

    }

    public static boolean isClassAssignable() {

        return Application.class.isAssignableFrom(MyApplication.class);

    }

}