/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.netbeans.libs.graaljs;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
import junit.framework.Test;
import org.graalvm.polyglot.Context;
import org.junit.AssumptionViolatedException;
import org.netbeans.api.scripting.Scripting;
import org.netbeans.junit.NbModuleSuite;
import org.netbeans.junit.NbTestCase;
import org.netbeans.libs.graalsdk.JavaScriptEnginesTest;

public final class GraalJSTest extends NbTestCase {
    public GraalJSTest(String name) {
        super(name);
    }

    public static Test suite() {
        return NbModuleSuite.createConfiguration(GraalJSTest.class).
            honorAutoloadEager(true).
            gui(false).
            suite();
    }


    public void testDirectEvaluationOfGraalJS() {
        Context ctx = Context.newBuilder("js").build();
        int fourtyTwo = ctx.eval("js", "6 * 7").asInt();
        assertEquals(42, fourtyTwo);
    }

    public void testJavaScriptEngineIsGraalJS() {
        ScriptEngineManager m = Scripting.createManager();
        StringBuilder sb = new StringBuilder();
        for (ScriptEngineFactory f : m.getEngineFactories()) {
            sb.append("\nf: ").append(f.getEngineName()).append(" ext: ").append(f.getMimeTypes());
        }
        ScriptEngine text = m.getEngineByMimeType("text/javascript");
        assertEquals(sb.toString(), "GraalVM:js", text.getFactory().getEngineName());

        ScriptEngine app = m.getEngineByMimeType("application/javascript");
        assertEquals(sb.toString(), "GraalVM:js", app.getFactory().getEngineName());
    }

    public void testDeleteASymbol() throws Exception {
        ScriptEngine eng = Scripting.createManager().getEngineByName("GraalVM:js");
        Object function = eng.eval("typeof isFinite");
        eng.eval("delete isFinite");
        Object undefined = eng.eval("typeof isFinite");

        assertEquals("Defined at first", "function", function);
        assertEquals("Deleted later", "undefined", undefined);
    }

    public void testAllJavaScriptEnginesTest() throws Throwable {
        StringWriter w = new StringWriter();
        PrintWriter pw = new PrintWriter(w);
        boolean err = false;
        Method[] testMethods = JavaScriptEnginesTest.class.getMethods();
        for (Method m : testMethods) {
            final org.junit.Test ann = m.getAnnotation(org.junit.Test.class);
            if (ann == null) {
                continue;
            }
            ScriptEngine eng = Scripting.createManager().getEngineByName("GraalVM:js");
            err |= invokeTestMethod(eng, false, pw, m, ann);
            ScriptEngine engAllow = Scripting.newBuilder().allowAllAccess(true).build().getEngineByName("GraalVM:js");
            err |= invokeTestMethod(engAllow, true, pw, m, ann);
        }
        pw.flush();
        if (err) {
            fail(w.toString());
        }
    }

    private static boolean invokeTestMethod(ScriptEngine eng, final boolean allowAllAccess, PrintWriter pw, Method m, final org.junit.Test ann) throws IllegalAccessException, IllegalArgumentException {
        JavaScriptEnginesTest instance = new JavaScriptEnginesTest("GraalVM:js", null, null, eng, allowAllAccess);
        try {
            pw.println("Invoking " + m.getName() + " allowAllAccess: " + allowAllAccess);
            m.invoke(instance);
        } catch (InvocationTargetException invEx) {
            if (invEx.getCause() instanceof AssumptionViolatedException) {
                return false;
            }
            if (ann.expected().equals(invEx.getCause().getClass())) {
                pw.println("Expected exception received " + ann.expected().getName());
            } else {
                invEx.getCause().printStackTrace(pw);
                return true;
            }
        }
        return false;
    }
}