/*
 * Copyright 2015 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
 *
 *      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.springframework.cloud.config.monitor;

import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;

import org.springframework.beans.BeansException;
import org.springframework.cloud.bus.event.RefreshRemoteApplicationEvent;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.ApplicationEventPublisherAware;
import org.springframework.http.MediaType;
import org.springframework.util.MultiValueMap;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import lombok.RequiredArgsConstructor;
import lombok.extern.apachecommons.CommonsLog;

/**
 * HTTP endpoint for webhooks coming from repository providers.
 *
 * @author Dave Syer
 *
 */
@RequiredArgsConstructor
@RestController
@RequestMapping("${spring.cloud.config.monitor.endpoint.path:}/monitor")
@CommonsLog
public class PropertyPathEndpoint
		implements ApplicationEventPublisherAware, ApplicationContextAware {

	private final PropertyPathNotificationExtractor extractor;
	private ApplicationEventPublisher applicationEventPublisher;

	private String contextId = UUID.randomUUID().toString();

	@Override
	public void setApplicationContext(ApplicationContext applicationContext)
			throws BeansException {
		this.contextId = applicationContext.getId();
	}

	@Override
	public void setApplicationEventPublisher(
			ApplicationEventPublisher applicationEventPublisher) {
		this.applicationEventPublisher = applicationEventPublisher;
	}

	@RequestMapping(method = RequestMethod.POST)
	public Set<String> notifyByPath(@RequestHeader MultiValueMap<String, String> headers,
			@RequestBody Map<String, Object> request) {
		PropertyPathNotification notification = this.extractor.extract(headers, request);
		if (notification != null) {

			Set<String> services = new HashSet<>();

			for (String path : notification.getPaths()) {
				services.addAll(guessServiceName(path));
			}
			if (this.applicationEventPublisher != null) {
				for (String service : services) {
					log.info("Refresh for: " + service);
					this.applicationEventPublisher
							.publishEvent(new RefreshRemoteApplicationEvent(this,
									this.contextId, service));
				}
				return services;
			}

		}
		return Collections.emptySet();
	}

	@RequestMapping(method = RequestMethod.POST, consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
	public Set<String> notifyByForm(@RequestHeader MultiValueMap<String, String> headers, @RequestParam("path") List<String> request) {
		Map<String, Object> map = new HashMap<>();
		String key = "path";
		map.put(key, request);
		return notifyByPath(headers, map);
	}

	private Set<String> guessServiceName(String path) {
		Set<String> services = new HashSet<>();
		if (path != null) {
			String stem = StringUtils
					.stripFilenameExtension(StringUtils.getFilename(path));
			// TODO: correlate with service registry, and if stem=="application"
			// return all, otherwise return only the matching service
			if (services.isEmpty()) {
				if ("application".equals(stem)) {
					services.add("*");
				}
				else {
					services.add(stem);
				}
			}
		}
		return services;
	}

}

@@ -739,24 +739,56 @@
 il.HashSet;%0A
+import java.util.LinkedHashSet;%0A
 import java.
@@ -2998,32 +2998,38 @@
  services = new 
+Linked
 HashSet%3C%3E();%0A%0A%09%09

Fix ordering problem in test