/*
 *  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.codehaus.groovy.classgen.asm.indy;

import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.classgen.asm.CallSiteWriter;
import org.codehaus.groovy.classgen.asm.WriterController;

/**
 * Dummy class used by the indy implementation.
 * This class mostly contains empty stubs for calls to the call site writer,
 * since this class is normally used to prepare call site caching and in indy
 * call site caching is done by the jvm.
 */
public class IndyCallSiteWriter extends CallSiteWriter {

    /**
     * Creates a call-site writer that delegates property access to indy bytecode.
     */
    public IndyCallSiteWriter(final WriterController controller) {
        super(controller); this.controller = controller;
    }
    private final WriterController controller;

    /** {@inheritDoc} */
    @Override
    public void generateCallSiteArray() {}

    /** {@inheritDoc} */
    @Override
    public void makeCallSite(Expression receiver, String message, Expression arguments, boolean safe, boolean implicitThis, boolean callCurrent, boolean callStatic) {}

    /** {@inheritDoc} */
    @Override
    public void makeSingleArgumentCall(Expression receiver, String message, Expression arguments, boolean safe) {
        throw new GroovyBugError("At line " + receiver.getLineNumber() + " column " + receiver.getColumnNumber() + "\n" +
                "On receiver: " + receiver.getText() + " with message: " + message + " and arguments: " + arguments.getText() + "\n" +
                "This method should not have been called. Please try to create a simple example reproducing this error and file a bug report at https://issues.apache.org/jira/browse/GROOVY");
    }

    /** {@inheritDoc} */
    @Override
    public void prepareCallSite(String message) {}

    /** {@inheritDoc} */
    @Override
    public void makeSiteEntry() {}

    /** {@inheritDoc} */
    @Override
    public void makeCallSiteArrayInitializer() {}

    /** {@inheritDoc} */
    @Override
    public void makeGetPropertySite(Expression receiver, String name, boolean safe, boolean implicitThis) {
        InvokeDynamicWriter idw = (InvokeDynamicWriter)controller.getInvocationWriter();
        idw.writeGetProperty(receiver, name, safe, implicitThis, false);
    }

    /** {@inheritDoc} */
    @Override
    public void makeGroovyObjectGetPropertySite(Expression receiver, String name, boolean safe, boolean implicitThis) {
        InvokeDynamicWriter idw = (InvokeDynamicWriter)controller.getInvocationWriter();
        idw.writeGetProperty(receiver, name, safe, implicitThis, true);
    }

    /**
     * GROOVY-12138: emit an {@code invokedynamic} call site for property
     * writes instead of the static {@code ScriptBytecodeAdapter.setProperty}
     * call, giving writes the same call-site caching, guarding, and JIT
     * inlining that reads have had via {@code getProperty} sites. Compile-time
     * flag, on by default; set {@code -Dgroovy.indy.setproperty=false} to
     * disable (opt-out).
     */
    private static final boolean INDY_SET_PROPERTY = org.apache.groovy.util.SystemUtil.getBooleanSafe("groovy.indy.setproperty", true);

    /** {@inheritDoc} */
    @Override
    public void makeSetPropertySite(org.codehaus.groovy.ast.expr.PropertyExpression expression, Expression objectExpression, String name, org.codehaus.groovy.classgen.asm.MethodCallerMultiAdapter adapter, boolean groovyObject) {
        if (INDY_SET_PROPERTY && !expression.isSafe() && !expression.isSpreadSafe()) {
            InvokeDynamicWriter idw = (InvokeDynamicWriter) controller.getInvocationWriter();
            idw.writeSetProperty(objectExpression, name, expression.isImplicitThis(), groovyObject);
        } else {
            super.makeSetPropertySite(expression, objectExpression, name, adapter, groovyObject);
        }
    }
}
