/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.sdc.fe.config;

import java.util.HashMap;
import java.util.Map;
import org.openecomp.sdc.common.api.BasicConfiguration;
import org.openecomp.sdc.common.api.ConfigurationListener;
import org.openecomp.sdc.common.api.ConfigurationSource;
import org.openecomp.sdc.common.api.FileChangeCallback;
import org.openecomp.sdc.common.config.EcompErrorConfiguration;
import org.openecomp.sdc.common.config.IEcompConfigurationManager;
import org.openecomp.sdc.common.log.wrappers.Logger;
import org.openecomp.sdc.common.rest.api.RestConfigurationInfo;

public class ConfigurationManager implements FileChangeCallback, IEcompConfigurationManager {

    private static final Logger log = Logger.getLogger(ConfigurationManager.class.getName());
    private static ConfigurationManager instance;
    ConfigurationSource configurationSource = null;
    Map<String, Object> configurations = new HashMap<>();

    public ConfigurationManager(ConfigurationSource configurationSource) {
        super();
        this.configurationSource = configurationSource;
        loadConfigurationFiles();
        instance = this;
    }

    public static ConfigurationManager getConfigurationManager() {
        return instance;
    }

    public static void setTestInstance(ConfigurationManager configurationManagerInstance) {
        instance = configurationManagerInstance;
    }

    private void loadConfigurationFiles() {
        loadConfigurationClass(Configuration.class);
        loadConfigurationClass(RestConfigurationInfo.class);
        loadConfigurationClass(EcompErrorConfiguration.class);
        loadConfigurationClass(PluginsConfiguration.class);
        loadConfigurationClass(WorkspaceConfiguration.class);
    }

    private <T extends BasicConfiguration> void loadConfigurationClass(Class<T> clazz) {
        ConfigurationListener configurationListener = new ConfigurationListener(clazz, this);
        log.info("created listener for class {}: {}", clazz.getName(), configurationListener);
        T object = configurationSource.getAndWatchConfiguration(clazz, configurationListener);
        configurations.put(getKey(clazz), object);
    }

    private <T> String getKey(Class<T> class1) {
        return class1.getSimpleName();
    }

    public Configuration getConfiguration() {
        return (Configuration) configurations.get(getKey(Configuration.class));
    }

    public RestConfigurationInfo getRestClientConfiguration() {
        return (RestConfigurationInfo) configurations.get(getKey(RestConfigurationInfo.class));
    }

    @Override
    public EcompErrorConfiguration getEcompErrorConfiguration() {
        return (EcompErrorConfiguration) configurations.get(getKey(EcompErrorConfiguration.class));
    }

    public PluginsConfiguration getPluginsConfiguration() {
        log.info("requested plugins configuration and got this:{}", configurations.get(getKey(PluginsConfiguration.class)));
        return (PluginsConfiguration) configurations.get(getKey(PluginsConfiguration.class));
    }

    public WorkspaceConfiguration getWorkspaceConfiguration() {
        log.info("requested plugins configuration and got this:{}", configurations.get(getKey(WorkspaceConfiguration.class)));
        return (WorkspaceConfiguration) configurations.get(getKey(WorkspaceConfiguration.class));
    }

    public Configuration getConfigurationAndWatch(ConfigurationListener configurationListener) {
        if (configurationListener != null) {
            configurationSource.addWatchConfiguration(Configuration.class, configurationListener);
        }
        return (Configuration) configurations.get(getKey(Configuration.class));
    }

    public void reconfigure(BasicConfiguration obj) {
    }
}