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/**
 * 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.camel.cdi;

import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.TypeConverter;
import org.apache.camel.component.mock.MockEndpoint;

import javax.enterprise.event.Event;
import javax.enterprise.inject.Any;
import javax.enterprise.inject.InjectionException;
import javax.enterprise.inject.Instance;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.Typed;
import javax.enterprise.inject.UnsatisfiedResolutionException;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.util.TypeLiteral;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.GenericArrayType;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

final class CdiCamelFactory {

    @Produces
    private static TypeConverter typeConverter(InjectionPoint ip, @Any Instance instance, CdiCamelExtension extension) {
        return selectContext(ip, instance, extension).getTypeConverter();
    }

    @Uri("")
    @Produces
    // Qualifiers are dynamically added in CdiCamelExtension
    private static ProducerTemplate producerTemplate(InjectionPoint ip, @Any Instance instance, CdiCamelExtension extension) {
        Uri uri = CdiSpiHelper.getQualifierByType(ip, Uri.class);
        try {
            CamelContext context = uri.context().isEmpty() ? selectContext(ip, instance, extension) : selectContext(uri.context(), instance);
            ProducerTemplate producerTemplate = context.createProducerTemplate();
            // FIXME: avoid NPE caused by missing @Uri qualifier when injection point is @ContextName qualified
            Endpoint endpoint = context.getEndpoint(uri.value(), Endpoint.class);
            producerTemplate.setDefaultEndpoint(endpoint);
            return producerTemplate;
        } catch (Exception cause) {
            throw new InjectionException("Error injecting producer template annotated with " + uri + " into " + ip, cause);
        }
    }

    @Produces
    @Typed(MockEndpoint.class)
    // Qualifiers are dynamically added in CdiCamelExtension
    private static MockEndpoint mockEndpointFromMember(InjectionPoint ip, @Any Instance instance, CdiCamelExtension extension) {
        String uri = "mock:" + ip.getMember().getName();
        try {
            return selectContext(ip, instance, extension).getEndpoint(uri, MockEndpoint.class);
        } catch (Exception cause) {
            throw new InjectionException("Error injecting mock endpoint into " + ip, cause);
        }
    }

    @Uri("")
    @Produces
    @Typed(MockEndpoint.class)
    // Qualifiers are dynamically added in CdiCamelExtension
    private static MockEndpoint mockEndpointFromUri(InjectionPoint ip, @Any Instance instance, CdiCamelExtension extension) {
        Uri uri = CdiSpiHelper.getQualifierByType(ip, Uri.class);
        try {
            CamelContext context = uri.context().isEmpty() ? selectContext(ip, instance, extension) : selectContext(uri.context(), instance);
            return context.getEndpoint(uri.value(), MockEndpoint.class);
        } catch (Exception cause) {
            throw new InjectionException("Error injecting mock endpoint annotated with " + uri + " into " + ip, cause);
        }
    }

    // Maintained for backward compatibility reason though this is redundant with @Uri, see https://issues.apache.org/jira/browse/CAMEL-5553?focusedCommentId=13445936&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13445936
    @Mock("")
    @Produces
    @Typed(MockEndpoint.class)
    // Qualifiers are dynamically added in CdiCamelExtension
    private static MockEndpoint createMockEndpoint(InjectionPoint ip, @Any Instance instance, CdiCamelExtension extension) {
        Mock mock = CdiSpiHelper.getQualifierByType(ip, Mock.class);
        try {
            CamelContext context = mock.context().isEmpty() ? selectContext(ip, instance, extension) : selectContext(mock.context(), instance);
            return context.getEndpoint(mock.value(), MockEndpoint.class);
        } catch (Exception cause) {
            throw new InjectionException("Error injecting mock endpoint annotated with " + mock + " into " + ip, cause);
        }
    }

    @Uri("")
    @Produces
    // Qualifiers are dynamically added in CdiCamelExtension
    private static Endpoint endpoint(InjectionPoint ip, @Any Instance instance, CdiCamelExtension extension) {
        Uri uri = CdiSpiHelper.getQualifierByType(ip, Uri.class);
        try {
            CamelContext context = uri.context().isEmpty() ? selectContext(ip, instance, extension) : selectContext(uri.context(), instance);
            return context.getEndpoint(uri.value(), Endpoint.class);
        } catch (Exception cause) {
            throw new InjectionException("Error injecting endpoint annotated with " + uri + " into " + ip, cause);
        }
    }

    @Produces
    @SuppressWarnings("unchecked")
    // Qualifiers are dynamically added in CdiCamelExtension
    private static  CdiEventEndpoint cdiEventEndpoint(InjectionPoint ip, @Any Instance instance, CdiCamelExtension extension, @Any Event