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/**
 * Copyright 2010-2014 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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.kuali.common.util.spring.service;

import java.util.Arrays;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;
import org.kuali.common.util.Assert;
import org.kuali.common.util.CollectionUtils;
import org.kuali.common.util.spring.PropertySourceUtils;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.PropertySource;

public final class DefaultPropertySourceService implements PropertySourceService {

	public DefaultPropertySourceService(SpringService springService) {
		Assert.noNulls(springService);
		this.springService = springService;
	}

	private final SpringService springService;

	@Override
	public PropertySource getPropertySource(Class config) {
		return getPropertySource(null, null, null, config);
	}

	@Override
	public PropertySource getPropertySource(Map beans, List defaultProfiles, List activeProfiles, Class config) {
		return getPropertySource(beans, defaultProfiles, activeProfiles, config, null);
	}

	@Override
	public List> getPropertySources(Map beans, List defaultProfiles, List activeProfiles, Class config) {
		return getPropertySources(beans, defaultProfiles, activeProfiles, config, null);
	}

	@Override
	public List> getPropertySources(Map beans, List defaultProfiles, List activeProfiles, String location) {
		return getPropertySources(beans, defaultProfiles, activeProfiles, null, location);
	}

	protected PropertySource getPropertySource(Map beans, List defaultProfiles, List activeProfiles, Class config, String location) {
		List> sources = getPropertySources(beans, defaultProfiles, activeProfiles, config, location);
		Assert.isTrue(sources.size() == 1, "sizes != 1");
		return sources.get(0);
	}

	protected List> getPropertySources(Map beans, List defaultProfiles, List activeProfiles, Class config, String location) {

		Assert.notNull(springService, "springService is null");

		SpringContext context = new SpringContext();
		context.setContextBeans(beans);
		if (!StringUtils.isBlank(location)) {
			context.setLocations(Arrays.asList(location));
		} else if (config != null) {
			context.setAnnotatedClasses(CollectionUtils.asList(config));
		} else {
			throw new IllegalArgumentException("Must supply either a location or annotated config");
		}
		context.setActiveProfiles(activeProfiles);
		context.setDefaultProfiles(defaultProfiles);
		ConfigurableApplicationContext ctx = springService.getApplicationContext(context);
		ctx.refresh();
		return PropertySourceUtils.getPropertySources(ctx);
	}

	public SpringService getSpringService() {
		return springService;
	}

}