/*
 * ============LICENSE_START==========================================
 * org.onap.music
 * ===================================================================
 *  Copyright (c) 2017 AT&T Intellectual Property
 * ===================================================================
 *  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.onap.music;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.onap.aaf.cadi.PropAccess;
import org.onap.music.authentication.CadiAuthFilter;
import org.onap.music.authentication.MusicAuthorizationFilter;
import org.onap.music.eelf.logging.EELFLoggerDelegate;
import org.onap.music.eelf.logging.MusicLoggingServletFilter;
import org.onap.music.lockingservice.cassandra.LockCleanUpDaemon;
import org.onap.music.main.MusicUtil;
import org.onap.music.main.PropertiesLoader;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.data.cassandra.CassandraDataAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.DependsOn;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.context.request.RequestContextListener;

@SpringBootApplication(scanBasePackages = { "org.onap.music.rest"})
@EnableAutoConfiguration(exclude = { CassandraDataAutoConfiguration.class })
@ComponentScan(value = { "org.onap.music" })
@EnableScheduling
public class MusicApplication extends SpringBootServletInitializer {

    private static final String KEYSPACE_PATTERN = "/v2/keyspaces/*";
    private static final String LOCKS_PATTERN = "/v2/locks/*";
    private static final String Q_PATTERN = "/v2/priorityq/*";

    @Autowired
    private PropertiesLoader propertyLoader;
    private EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(MusicApplication.class);


    public static void main(String[] args) {
        new MusicApplication().configure(new SpringApplicationBuilder(MusicApplication.class)).run(args);
        
        LockCleanUpDaemon daemon = new LockCleanUpDaemon();
        daemon.setDaemon(true);
        daemon.start();
    }

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {

        return application.sources(MusicApplication.class);
    }

    @Bean("loadProperties")
    public void loadProperties() {
        propertyLoader.loadProperties();
    }


    @Bean
    @DependsOn("loadProperties")
    public PropAccess propAccess() {
        if (MusicUtil.getIsCadi()) {
            return new PropAccess(new String[] { 
                "cadi_prop_files=/opt/app/music/etc/cadi.properties" });
        } else {
            return null;
        }
    }

    @Bean(name = "cadiFilter")
    @DependsOn("loadProperties")
    public Filter cadiFilter() throws ServletException {
        propertyLoader.loadProperties();
        if (MusicUtil.getIsCadi()) {
            PropAccess propAccess = propAccess();
            return new CadiAuthFilter(propAccess);
        } else {
            return (ServletRequest request, ServletResponse response, FilterChain chain) -> {
                // do nothing for now.
            };
        }
    }
    
    /**
     * Added for capturing custom header values from client.
     * 
     * order is set to 1 for this filter
     * 
     * sp931a
     * 
     * @return
     * @throws ServletException
     */
    @Bean(name="logFilter")
    @DependsOn("loadProperties")
    public FilterRegistrationBean<Filter> loggingFilterRegistration() throws ServletException {
        logger.info("loggingFilterRegistration called for log filter..");
        propertyLoader.loadProperties();
        FilterRegistrationBean<Filter> frb = new FilterRegistrationBean<>();
        frb.setFilter(new MusicLoggingServletFilter());
        frb.addUrlPatterns(
            KEYSPACE_PATTERN,
            LOCKS_PATTERN,
            Q_PATTERN
        );
        frb.setName("logFilter");
        frb.setOrder(1);
        return frb;
    }

    @Bean
    @DependsOn("loadProperties")
    public FilterRegistrationBean<Filter> cadiFilterRegistration() throws ServletException {
        logger.info("cadiFilterRegistration called for cadi filter..");
        FilterRegistrationBean<Filter> frb = new FilterRegistrationBean<>();
        frb.setFilter(cadiFilter());
        if (MusicUtil.getIsCadi()) {
            frb.addUrlPatterns(
                KEYSPACE_PATTERN,
                LOCKS_PATTERN,
                Q_PATTERN
            );
        } else {
            frb.addUrlPatterns("/v0/test");
        }
        frb.setName("cadiFilter");
        frb.setOrder(2);
        return frb;
    }

    
    /**
     * Added for Authorization using CADI
     * 
     * sp931a
     * 
     * @return
     * @throws ServletException
     */
    @Bean
    @DependsOn("loadProperties")
    public FilterRegistrationBean<Filter> cadiFilterRegistrationForAuth() throws ServletException {
        logger.info("cadiFilterRegistrationForAuth called for cadi auth filter..");
        FilterRegistrationBean<Filter> frb = new FilterRegistrationBean<>();
        frb.setFilter(cadiMusicAuthFilter());

        if (MusicUtil.getIsCadi()) {
            frb.addUrlPatterns(
                KEYSPACE_PATTERN,
                LOCKS_PATTERN,
                Q_PATTERN
                );
        } else {
            frb.addUrlPatterns("/v0/test");
        }
        frb.setName("cadiMusicAuthFilter");
        frb.setOrder(3);
        return frb;
    }

    @Bean(name = "cadiMusicAuthFilter")
    @DependsOn("loadProperties")
    public Filter cadiMusicAuthFilter() throws ServletException {
        propertyLoader.loadProperties();
        if (MusicUtil.getIsCadi()) {
            return new MusicAuthorizationFilter();
        } else {
            return (ServletRequest request, ServletResponse response, FilterChain chain) -> {
                // do nothing for now.
            };
        }
    }

    @Bean
    @ConditionalOnMissingBean(RequestContextListener.class)
    public RequestContextListener requestContextListener() {
        return new RequestContextListener();
    }
}