/*
 * 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.apache.deltaspike.core.util.metadata.builder;

import javax.enterprise.inject.spi.AnnotatedCallable;
import javax.enterprise.inject.spi.AnnotatedParameter;
import javax.enterprise.inject.spi.AnnotatedType;
import java.lang.reflect.Member;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * Implementation of {@link AnnotatedCallable}
 */
abstract class AnnotatedCallableImpl<X, Y extends Member> extends AnnotatedMemberImpl<X, Y>
        implements AnnotatedCallable<X>
{

    private final List<AnnotatedParameter<X>> parameters;

    protected AnnotatedCallableImpl(AnnotatedType<X> declaringType, Y member, Class<?> memberType,
                                    Class<?>[] parameterTypes, Type[] genericTypes, AnnotationStore annotations,
                                    Map<Integer, AnnotationStore> parameterAnnotations, Type genericType,
                                    Map<Integer, Type> parameterTypeOverrides)
    {
        super(declaringType, member, memberType, annotations, genericType, null);
        parameters = getAnnotatedParameters(this, parameterTypes, genericTypes, parameterAnnotations,
                parameterTypeOverrides);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public List<AnnotatedParameter<X>> getParameters()
    {
        return Collections.unmodifiableList(parameters);
    }

    public AnnotatedParameter<X> getParameter(int index)
    {
        return parameters.get(index);

    }

    private static <X, Y extends Member> List<AnnotatedParameter<X>> getAnnotatedParameters(
            AnnotatedCallableImpl<X, Y> callable, Class<?>[] parameterTypes, Type[] genericTypes,
            Map<Integer, AnnotationStore> parameterAnnotations,
            Map<Integer, Type> parameterTypeOverrides)
    {
        List<AnnotatedParameter<X>> parameters = new ArrayList<AnnotatedParameter<X>>();
        int len = parameterTypes.length;

        for (int i = 0; i < len; ++i)
        {
            AnnotationBuilder builder = new AnnotationBuilder();
            if (parameterAnnotations != null && parameterAnnotations.containsKey(i))
            {
                builder.addAll(parameterAnnotations.get(i));
            }
            Type over = null;
            if (parameterTypeOverrides != null)
            {
                over = parameterTypeOverrides.get(i);
            }
            AnnotatedParameterImpl<X> p = new AnnotatedParameterImpl<X>(
                    callable, parameterTypes[i], i, builder.create(), genericTypes[i], over);

            parameters.add(p);
        }
        return parameters;
    }

}