/**
 * ============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.fs;

import static org.onap.aaf.auth.rserv.HttpMethods.GET;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.onap.aaf.auth.env.AuthzEnv;
import org.onap.aaf.auth.env.AuthzTrans;
import org.onap.aaf.auth.env.AuthzTransOnlyFilter;
import org.onap.aaf.auth.rserv.CachingFileAccess;
import org.onap.aaf.auth.rserv.HttpCode;
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.Access.Level;
import org.onap.aaf.cadi.CadiException;
import org.onap.aaf.cadi.LocatorException;
import org.onap.aaf.cadi.PropAccess;
import org.onap.aaf.cadi.config.Config;
import org.onap.aaf.cadi.register.Registrant;
import org.onap.aaf.cadi.register.RemoteRegistrant;

public class AAF_FS extends AbsService<AuthzEnv, AuthzTrans>  {

    public AAF_FS(final AuthzEnv env) throws IOException, CadiException {
        super(env.access(),env);
        try {
            ///////////////////////
            // File Server
            ///////////////////////
            // creates StaticSlot, needed for CachingFileAccess, and sets to public Dir
            env.staticSlot(CachingFileAccess.CFA_WEB_PATH,"aaf_public_dir");

            CachingFileAccess<AuthzTrans> cfa = new CachingFileAccess<>(env);
            route(env,GET,"/:key*", cfa);
            final String aaf_locate_url = Config.getAAFLocateUrl(access);
            if (aaf_locate_url == null) {
                access.printf(Level.WARN, "Redirection requires property %s",Config.AAF_LOCATE_URL);
            } else {
                route(env,GET,"/", new Redirect(this,aaf_locate_url));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static class Redirect extends HttpCode<AuthzTrans, AAF_FS> {
        private final String url;

        public Redirect(AAF_FS context,String url) {
            super(context, "Redirect to HTTP/S");
            this.url = url;
        }

        @Override
        public void handle(AuthzTrans trans, HttpServletRequest req, HttpServletResponse resp) throws Exception {
            trans.info().printf("Redirecting %s to HTTP/S %s", req.getRemoteAddr(), req.getLocalAddr());
            resp.sendRedirect(url);
        }
    };

    @Override
    public Filter[] _filters(Object ... additionalTafLurs) throws CadiException, LocatorException {
        // Note: No TAFs and Lurs on FileServer
        return new Filter[] {
            new AuthzTransOnlyFilter(env)
        };
    }

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

    public static void main(final String[] args) {
        try {
            Log4JLogIt logIt = new Log4JLogIt(args, "fs");
            PropAccess propAccess = new PropAccess(logIt,args);
            try {
                new JettyServiceStarter<AuthzEnv,AuthzTrans>(
                    new AAF_FS(new AuthzEnv(propAccess)),false)
                        .start();
            } catch (Exception e) {
                propAccess.log(e);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}