/*
 * Copyright 2015-2019 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.zookeeper.discovery.dependency;

import java.util.Collections;
import java.util.Map;

import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
import org.springframework.boot.context.properties.bind.Bindable;
import org.springframework.boot.context.properties.bind.Binder;
import org.springframework.context.annotation.ConditionContext;
import org.springframework.core.type.AnnotatedTypeMetadata;

/**
 * Condition that verifies if the Dependencies have been passed in an appropriate place in
 * the application properties.
 *
 * @author Marcin Grzejszczak
 * @since 1.0.0
 */
public class DependenciesPassedCondition extends SpringBootCondition {

	private static final Bindable<Map<String, String>> STRING_STRING_MAP = Bindable
			.mapOf(String.class, String.class);

	private static final String ZOOKEEPER_DEPENDENCIES_PROP = "spring.cloud.zookeeper.dependencies";

	@Override
	public ConditionOutcome getMatchOutcome(ConditionContext context,
			AnnotatedTypeMetadata metadata) {
		Map<String, String> subProperties = Binder.get(context.getEnvironment())
				.bind(ZOOKEEPER_DEPENDENCIES_PROP, STRING_STRING_MAP)
				.orElseGet(Collections::emptyMap);
		if (!subProperties.isEmpty()) {
			return ConditionOutcome.match("Dependencies are defined in configuration");
		}
		Boolean dependenciesEnabled = context.getEnvironment().getProperty(
				"spring.cloud.zookeeper.dependency.enabled", Boolean.class, false);
		if (dependenciesEnabled) {
			return ConditionOutcome.match(
					"Dependencies are not defined in configuration, but switch is turned on");
		}
		return ConditionOutcome
				.noMatch("No dependencies have been passed for the service");
	}

}