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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 {

    // The method objects for serial numbers
    private final ProfiledMethods profiledMethods;

    public BuiltinProfilingService(Ruby runtime) {
        this.profiledMethods = new ProfiledMethods(runtime);
    }

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

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

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

    @Override
    public void addProfiledMethod(String id, DynamicMethod method) {
        profiledMethods.addProfiledMethod(id, method);
    }

    /**
     * @author Andre Kullmann
     */
    private final class DefaultMethodEnhancer implements MethodEnhancer {
        @Override
        @SuppressWarnings("deprecation")
        public DynamicMethod enhance(String id, DynamicMethod delegate) {
            profiledMethods.addProfiledMethod(id, 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 Ruby getRuntime() {
            return context.runtime;
        }

        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() + " !");
            }
        }

    }
}