/**
 * ============LICENSE_START====================================================
 * org.onap.aaf
 * ===========================================================================
 * Copyright (c) 2018 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.onap.aaf.auth.locate;

import java.net.URI;
import java.net.UnknownHostException;
import java.util.Map;

import javax.servlet.Filter;

import org.onap.aaf.auth.cache.Cache;
import org.onap.aaf.auth.cache.Cache.Dated;
import org.onap.aaf.auth.dao.CassAccess;
import org.onap.aaf.auth.dao.cass.ConfigDAO;
import org.onap.aaf.auth.dao.cass.LocateDAO;
import org.onap.aaf.auth.dao.hl.Question;
import org.onap.aaf.auth.direct.DirectLocatorCreator;
import org.onap.aaf.auth.direct.DirectRegistrar;
import org.onap.aaf.auth.env.AuthzEnv;
import org.onap.aaf.auth.env.AuthzTrans;
import org.onap.aaf.auth.env.AuthzTransFilter;
import org.onap.aaf.auth.locate.api.API_AAFAccess;
import org.onap.aaf.auth.locate.api.API_Api;
import org.onap.aaf.auth.locate.api.API_Find;
import org.onap.aaf.auth.locate.api.API_Proxy;
import org.onap.aaf.auth.locate.facade.LocateFacadeFactory;
import org.onap.aaf.auth.locate.facade.LocateFacade_1_1;
import org.onap.aaf.auth.locate.mapper.Mapper.API;
import org.onap.aaf.auth.rserv.HttpMethods;
import org.onap.aaf.auth.server.AbsService;
import org.onap.aaf.auth.server.JettyServiceStarter;
import org.onap.aaf.auth.server.Log4JLogIt;
import org.onap.aaf.cadi.CadiException;
import org.onap.aaf.cadi.Locator;
import org.onap.aaf.cadi.LocatorException;
import org.onap.aaf.cadi.PropAccess;
import org.onap.aaf.cadi.aaf.v2_0.AAFAuthn;
import org.onap.aaf.cadi.aaf.v2_0.AAFConHttp;
import org.onap.aaf.cadi.aaf.v2_0.AAFLurPerm;
import org.onap.aaf.cadi.aaf.v2_0.AAFTrustChecker;
import org.onap.aaf.cadi.aaf.v2_0.AbsAAFLocator;
import org.onap.aaf.cadi.config.Config;
import org.onap.aaf.cadi.config.RegistrationPropHolder;
import org.onap.aaf.cadi.register.Registrant;
import org.onap.aaf.misc.env.APIException;
import org.onap.aaf.misc.env.Data;
import org.onap.aaf.misc.env.Env;

import com.datastax.driver.core.Cluster;

public class AAF_Locate extends AbsService<AuthzEnv, AuthzTrans> {
    private static final String USER_PERMS = "userPerms";
    private LocateFacade_1_1 facade; // this is the default Facade
    private LocateFacade_1_1 facade_1_1_XML;
    public Map<String, Dated> cacheUser;
    public final AAFAuthn<?> aafAuthn;
    public final AAFLurPerm aafLurPerm;
    private Locator<URI> gui_locator;
    public final long expireIn;
    private final Cluster cluster;
    public final LocateDAO locateDAO;
    public final ConfigDAO configDAO;
    private Locator<URI> dal;

    public final Question question;
    /**
     * Construct AuthzAPI with all the Context Supporting Routes that Authz needs
     *
     * @param env
     * @param si
     * @param dm
     * @param decryptor
     * @throws APIException
     */
    public AAF_Locate(final AuthzEnv env) throws Exception {
        super(env.access(), env);

        expireIn = Long.parseLong(env.getProperty(Config.AAF_USER_EXPIRES, Config.AAF_USER_EXPIRES_DEF));

        // Initialize Facade for all uses
        AuthzTrans trans = env.newTransNoAvg();

        cluster = org.onap.aaf.auth.dao.CassAccess.cluster(env,null);
        locateDAO = new LocateDAO(trans,cluster,CassAccess.KEYSPACE);
        configDAO = new ConfigDAO(trans,locateDAO); // same stuff

        // Have AAFLocator object Create DirectLocators for Location needs
        AbsAAFLocator.setCreator(new DirectLocatorCreator(env, locateDAO));

        aafLurPerm = aafCon().newLur();
        // Note: If you need both Authn and Authz construct the following:
        aafAuthn = aafCon().newAuthn(aafLurPerm);


        facade = LocateFacadeFactory.v1_1(env,this,trans,Data.TYPE.JSON);   // Default Facade
        facade_1_1_XML = LocateFacadeFactory.v1_1(env,this,trans,Data.TYPE.XML);

        synchronized(env) {
            if (cacheUser == null) {
                cacheUser = Cache.obtain(USER_PERMS);
                Cache.startCleansing(env, USER_PERMS);
            }
        }

        question = new Question(trans, cluster, CassAccess.KEYSPACE);

        ////////////////////////////////////////////////////////////////////////////
        // Time Critical
        //  These will always be evaluated first
        ////////////////////////////////////////////////////////////////////////
        API_AAFAccess.init(this,facade);
        API_Find.init(this, facade);
        API_Proxy.init(this, facade, question);

        ////////////////////////////////////////////////////////////////////////
        // Management APIs
        ////////////////////////////////////////////////////////////////////////
        // There are several APIs around each concept, and it gets a bit too
        // long in this class to create.  The initialization of these Management
        // APIs have therefore been pushed to StandAlone Classes with static
        // init functions
        API_Api.init(this, facade);

        ////////////////////////////////////////////////////////////////////////
        // Default Function
        ////////////////////////////////////////////////////////////////////////
        API_AAFAccess.initDefault(this,facade);

    }


    /**
     * Setup XML and JSON implementations for each supported Version type
     *
     * We do this by taking the Code passed in and creating clones of these with the appropriate Facades and properties
     * to do Versions and Content switches
     *
     */
    public void route(HttpMethods meth, String path, API api, LocateCode code) throws Exception {
        String version = "1.0";
        // Get Correct API Class from Mapper
        Class<?> respCls = facade.mapper().getClass(api);
        if (respCls==null) throw new Exception("Unknown class associated with " + api.getClass().getName() + ' ' + api.name());
        // setup Application API HTML ContentTypes for JSON and Route
        String application = applicationJSON(respCls, version);
        route(env,meth,path,code,application,"application/json;version="+version,"*/*","*");

        // setup Application API HTML ContentTypes for XML and Route
        application = applicationXML(respCls, version);
        route(env,meth,path,code.clone(facade_1_1_XML,false),application,"text/xml;version="+version);

        // Add other Supported APIs here as created
    }

    public void routeAll(HttpMethods meth, String path, API api, LocateCode code){
        route(env,meth,path,code,""); // this will always match
    }


    /* (non-Javadoc)
     * @see org.onap.aaf.auth.server.AbsServer#_newAAFConHttp()
     */
    @Override
    protected AAFConHttp _newAAFConHttp() throws CadiException {
        try {
            if (dal==null) {
                dal = AbsAAFLocator.create("%CNS.%NS.service",Config.AAF_DEFAULT_API_VERSION);
            }
            // utilize pre-constructed DirectAAFLocator
            return new AAFConHttp(env.access(),dal);
        } catch (LocatorException e) {
            throw new CadiException(e);
        }
    }

    public Locator<URI> getGUILocator() throws LocatorException {
        if (gui_locator==null) {
            RegistrationPropHolder rph;
            try {
                 rph = new RegistrationPropHolder(access, 0);
            } catch (UnknownHostException | CadiException e) {
                throw new LocatorException(e);
            }
            String url = rph.getPublicEntryName("gui", rph.default_container);
            gui_locator = AbsAAFLocator.create(url,Config.AAF_DEFAULT_API_VERSION);
        }
        return gui_locator;
    }


    @Override
    public Filter[] _filters(Object ... additionalTafLurs) throws CadiException, LocatorException {
        try {
            return new Filter[] {
                new AuthzTransFilter(env, aafCon(),
                    new AAFTrustChecker((Env)env)
                    ,additionalTafLurs
                )};
        } catch (NumberFormatException e) {
            throw new CadiException("Invalid Property information", e);
        }
    }

    @SuppressWarnings("unchecked")
    @Override
    public Registrant<AuthzEnv>[] registrants(final int port) throws CadiException {
        return new Registrant[] {
            new DirectRegistrar(access,locateDAO,port)
        };
    }

    @Override
    public void destroy() {
        Cache.stopTimer();
        if (cluster!=null) {
            cluster.close();
        }
        super.destroy();
    }

    public static void main(final String[] args) {
        try {
            Log4JLogIt logIt = new Log4JLogIt(args, "locate");
            PropAccess propAccess = new PropAccess(logIt,args);

            try {
                new JettyServiceStarter<AuthzEnv,AuthzTrans>(
                    new AAF_Locate(new AuthzEnv(propAccess)),true)
                        .start();
            } catch (Exception e) {
                propAccess.log(e);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}