/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010, Red Hat, Inc., and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed 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.jboss.weld.tests.decorators.custom;

import java.lang.annotation.Annotation;
import java.lang.reflect.Member;
import java.lang.reflect.Type;
import java.util.Collections;
import java.util.Set;

import javax.enterprise.context.Dependent;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.Default;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.Decorator;
import javax.enterprise.inject.spi.InjectionPoint;

import org.jboss.weld.annotated.enhanced.EnhancedAnnotatedField;
import org.jboss.weld.annotated.enhanced.EnhancedAnnotatedType;
import org.jboss.weld.annotated.slim.AnnotatedTypeIdentifier;
import org.jboss.weld.bootstrap.api.helpers.RegistrySingletonProvider;
import org.jboss.weld.metadata.TypeStore;
import org.jboss.weld.resources.ClassTransformer;
import org.jboss.weld.resources.ReflectionCacheFactory;
import org.jboss.weld.resources.SharedObjectCache;

/**
 * @author Marius Bogoevici
 */
public class CustomDecorator implements Decorator<Object> {
    private final Set<InjectionPoint> injectionPoints;
    private BeanManager beanManager;

    public CustomDecorator(BeanManager beanManager) {
        this.beanManager = beanManager;
        injectionPoints = Collections.singleton((InjectionPoint) new CustomInjectionPoint());
    }

    public Type getDelegateType() {
        return Window.class;
    }

    public Set<Annotation> getDelegateQualifiers() {
        return Collections.emptySet();
    }

    public Set<Type> getDecoratedTypes() {
        return Collections.singleton((Type) Window.class);
    }

    public Set<Type> getTypes() {
        return Collections.<Type> singleton(CustomWindowFrame.class);
    }

    public Set<Annotation> getQualifiers() {
        return Collections.emptySet();
    }

    public Class<? extends Annotation> getScope() {
        return Dependent.class;
    }

    public String getName() {
        return null;
    }

    public Set<Class<? extends Annotation>> getStereotypes() {
        return Collections.emptySet();

    }

    public Class<?> getBeanClass() {
        return CustomWindowFrame.class;
    }

    public boolean isAlternative() {
        return false;
    }

    public boolean isNullable() {
        return false;
    }

    public Set<InjectionPoint> getInjectionPoints() {
        return injectionPoints;
    }

    public Object create(CreationalContext<Object> creationalContext) {
        CustomWindowFrame customFrame = new CustomWindowFrame();
        customFrame.window = (Window) beanManager.getInjectableReference(injectionPoints.iterator().next(), creationalContext);
        return customFrame;
    }

    public void destroy(Object instance, CreationalContext<Object> creationalContext) {
        creationalContext.release();
    }

    class CustomInjectionPoint implements InjectionPoint {
        private final EnhancedAnnotatedField<CustomWindowFrame, ?> windowField;

        public CustomInjectionPoint() {
            TypeStore ts = new TypeStore();
            ClassTransformer transformer = new ClassTransformer(ts, new SharedObjectCache(), ReflectionCacheFactory.newInstance(ts), RegistrySingletonProvider.STATIC_INSTANCE);
            EnhancedAnnotatedType<?> targetClass = transformer.getEnhancedAnnotatedType(CustomWindowFrame.class, AnnotatedTypeIdentifier.NULL_BDA_ID);
            windowField = targetClass.getDeclaredEnhancedField("window");
        }

        public Type getType() {
            return Window.class;
        }

        public Set<Annotation> getQualifiers() {
            return Collections.<Annotation> singleton(Default.Literal.INSTANCE);
        }

        public Bean<?> getBean() {
            return CustomDecorator.this;
        }

        public Member getMember() {
            return ((AnnotatedField<?>) windowField).getJavaMember();
        }

        public Annotated getAnnotated() {
            return windowField;
        }

        public boolean isDelegate() {
            return true;
        }

        public boolean isTransient() {
            return false;
        }
    }
}