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package org.netbeans.html.boot.impl;

import java.io.Closeable;

import java.io.Reader;

import java.net.URL;

import java.util.Collection;

import org.netbeans.html.boot.spi.Fn;

import static org.testng.Assert.assertEquals;

import org.testng.annotations.BeforeMethod;

import org.testng.annotations.Test;

public class KeepAliveTest implements Fn.Presenter, Fn.KeepAlive, FindResources {

    private Class<?> jsMethods;

    @Test public void keepAliveIsSetToFalse() throws Exception {

        Closeable c = Fn.activate(this);

        Number ret = (Number)jsMethods.getMethod("checkAllowGC", java.lang.Object.class).invoke(null, this);

        c.close();

        assertEquals(ret.intValue(), 0, "keepAlive is set to false");

    }    

    @Test public void keepAliveIsTheDefault() throws Exception {

        Closeable c = Fn.activate(this);

        Number ret = (Number)jsMethods.getMethod("plus", int.class, int.class).invoke(null, 40, 2);

        c.close();

        assertEquals(ret.intValue(), 1, "keepAlive returns true when the presenter is invoked");

    }    

    @BeforeMethod

    public void initClass() throws ClassNotFoundException {

        ClassLoader loader = FnUtils.newLoader(this, this, KeepAliveTest.class.getClassLoader().getParent());

        jsMethods = loader.loadClass(JsMethods.class.getName());

    }

    @Override

    public Fn defineFn(String code, String[] names, final boolean[] keepAlive) {

        return new Fn(this) {

            @Override

            public java.lang.Object invoke(java.lang.Object thiz, java.lang.Object... args) throws Exception {

                boolean res = true;

                if (keepAlive != null) {

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

                        res &= keepAlive[i];

                    }

                }

                return res ? 1 : 0;

            }

        };

    }

    @Override

    public Fn defineFn(String code, String... names) {

        throw new UnsupportedOperationException("Never called!");

    }

    @Override

    public void displayPage(URL page, Runnable onPageLoad) {

        throw new UnsupportedOperationException();

    }

    @Override

    public void loadScript(Reader code) throws Exception {

    }

    @Override

    public void findResources(String path, Collection<? super URL> results, boolean oneIsEnough) {

        URL u = ClassLoader.getSystemClassLoader().getResource(path);

        if (u != null) {

            results.add(u);

        }

    }

}