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 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 1.0 (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.eclipse.org/legal/epl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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 * in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.runtime.profile.builtin;

import org.jruby.Ruby;
import org.jruby.RubyInstanceConfig;
import org.jruby.internal.runtime.methods.DynamicMethod;
import org.jruby.internal.runtime.methods.ProfilingDynamicMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.profile.MethodEnhancer;
import org.jruby.runtime.profile.ProfileCollection;
import org.jruby.runtime.profile.ProfileReporter;
import org.jruby.runtime.profile.ProfilingService;

/**
 * This implementation of {@link org.jruby.runtime.profile.ProfilingService} will be used for all profiling methods
 * which are shipped with jruby.
 *
 * @author Andre Kullmann
 */
public class BuiltinProfilingService implements ProfilingService {

    @Override
    public ProfileData newProfileCollection(ThreadContext context) {
        return new ProfileData( context );
    }

    @Override
    public DefaultMethodEnhancer newMethodEnhancer( final Ruby runtime ) {
        return new DefaultMethodEnhancer( runtime );
    }

    @Override
    public DefaultProfileReporter newProfileReporter(ThreadContext context) {
        return new DefaultProfileReporter( context );
    }

    /**
     * @author Andre Kullmann
     */
    private static final class DefaultMethodEnhancer implements MethodEnhancer {

        private final Ruby runtime;

        public DefaultMethodEnhancer( Ruby runtime ) {
            this.runtime = runtime;
        }

        private Ruby getRuntime() {
            return runtime;
        }

        @Override
        public DynamicMethod enhance( String name, DynamicMethod delegate ) {
            getRuntime().getProfiledMethods().addProfiledMethod( name, delegate );
            return new ProfilingDynamicMethod(delegate);
        }
    }

    /**
     * @author Andre Kullmann
     */
    private static final class DefaultProfileReporter implements ProfileReporter {

        private final ThreadContext context;

        public DefaultProfileReporter(ThreadContext context) {

            if( context == null )
                throw new IllegalArgumentException( "Given context must not be null." );

            this.context = context;
        }

        private ThreadContext getThreadContext() {
            return context;
        }

        private Ruby getRuntime() {
            return getThreadContext().getRuntime();
        }

        private RubyInstanceConfig getConfig() {
            return getRuntime().getInstanceConfig();
        }

        @Override
        public void report(ProfileCollection collector) {

            if(!(collector instanceof ProfileData))
                throw new IllegalArgumentException( "Given collector must be an instance of " + ProfileData.class.getName() + "." );

            RubyInstanceConfig config = getConfig();
            ProfileData   profileData = (ProfileData) collector;
            ProfileOutput      output = config.getProfileOutput();

            ProfilePrinter profilePrinter = ProfilePrinter.newPrinter( config.getProfilingMode(), profileData );
            if (profilePrinter != null) {
                output.printProfile(profilePrinter);
            } else {
                getRuntime().getOut().println("\nno printer for profile mode: " + config.getProfilingMode() + " !");
            }
        }

    }
}