/*
 * Copyright 2012-2019 the original author or authors.
 *
 * 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
 *
 *      https://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.springframework.cloud.bus;

import java.util.HashMap;
import java.util.Map;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.env.EnvironmentPostProcessor;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.MapPropertySource;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.env.PropertySource;

/**
 * {@link EnvironmentPostProcessor} that sets the default properties for the Bus.
 *
 * @author Dave Syer
 * @since 1.0.0
 */
public class BusEnvironmentPostProcessor implements EnvironmentPostProcessor {

	private static final String PROPERTY_SOURCE_NAME = "defaultProperties";

	@Override
	public void postProcessEnvironment(ConfigurableEnvironment environment,
			SpringApplication application) {
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("spring.cloud.stream.bindings." + SpringCloudBusClient.OUTPUT
				+ ".content-type",
				environment.getProperty("spring.cloud.bus.content-type",
						"application/json"));
		map.put("spring.cloud.bus.id", getDefaultServiceId(environment));
		addOrReplace(environment.getPropertySources(), map);
	}

	// TODO: move this to commons
	// @checkstyle:off
	private String getDefaultServiceId(ConfigurableEnvironment environment) {
		return "${vcap.application.name:${spring.application.name:application}}:${vcap.application.instance_index:${spring.application.index:${local.server.port:${server.port:0}}}}:${vcap.application.instance_id:${random.value}}";
	}
	// @checkstyle:on

	private void addOrReplace(MutablePropertySources propertySources,
			Map<String, Object> map) {
		MapPropertySource target = null;
		if (propertySources.contains(PROPERTY_SOURCE_NAME)) {
			PropertySource<?> source = propertySources.get(PROPERTY_SOURCE_NAME);
			if (source instanceof MapPropertySource) {
				target = (MapPropertySource) source;
				for (String key : map.keySet()) {
					if (!target.containsProperty(key)) {
						target.getSource().put(key, map.get(key));
					}
				}
			}
		}
		if (target == null) {
			target = new MapPropertySource(PROPERTY_SOURCE_NAME, map);
		}
		if (!propertySources.contains(PROPERTY_SOURCE_NAME)) {
			propertySources.addLast(target);
		}
	}

}

@@ -818,16 +818,71 @@
 cessor;%0A
+import org.springframework.cloud.commons.util.IdUtils;%0A
 import o
@@ -1786,39 +1786,39 @@
 d%22, 
-getDefaultServiceId(environment
+IdUtils.getUnresolvedServiceId(
 ));%0A
@@ -1880,382 +1880,8 @@
 %09%7D%0A%0A
-%09// TODO: move this to commons%0A%09// @checkstyle:off%0A%09private String getDefaultServiceId(ConfigurableEnvironment environment) %7B%0A%09%09return %22$%7Bvcap.application.name:$%7Bspring.application.name:application%7D%7D:$%7Bvcap.application.instance_index:$%7Bspring.application.index:$%7Blocal.server.port:$%7Bserver.port:0%7D%7D%7D%7D:$%7Bvcap.application.instance_id:$%7Brandom.value%7D%7D%22;%0A%09%7D%0A%09// @checkstyle:on%0A%0A
 %09pri

Use IdUtils to generate service id