/*
 * Copyright (c) 2016 Network New Technologies Inc.
 *
 * 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.
 */

package com.networknt.basicauth;

import com.networknt.client.Http2Client;
import com.networknt.exception.ClientException;
import io.undertow.Handlers;
import io.undertow.Undertow;
import io.undertow.client.ClientConnection;
import io.undertow.client.ClientRequest;
import io.undertow.client.ClientResponse;
import io.undertow.server.HttpHandler;
import io.undertow.server.RoutingHandler;
import io.undertow.util.Headers;
import io.undertow.util.Methods;
import org.apache.commons.codec.binary.Base64;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xnio.IoUtils;
import org.xnio.OptionMap;

import java.net.URI;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicReference;

import static java.nio.charset.StandardCharsets.UTF_8;

/**
 * This is a test class for anonymous and allowOtherAuth. It tests all scenarios of positive only.
 *
 * @author Steve Hu
 */
public class AnonymousBearerTest {
    static final Logger logger = LoggerFactory.getLogger(AnonymousBearerTest.class);

    static Undertow server = null;

    @BeforeClass
    public static void setUp() {
        if(server == null) {
            logger.info("starting server");
            HttpHandler handler = getTestHandler();
            // inject the BasicAuthHandler before the TestHandler for security
            BasicAuthHandler basicAuthHandler = new BasicAuthHandler(BasicAuthConfig.load("basic-auth-anonymous"));
            basicAuthHandler.setNext(handler);
            server = Undertow.builder()
                    .addHttpListener(17352, "localhost")
                    .setHandler(basicAuthHandler)
                    .build();
            server.start();
        }
    }

    @AfterClass
    public static void tearDown() throws Exception {
        if(server != null) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException ignored) {

            }
            server.stop();
            logger.info("The server is stopped.");
        }
    }

    static RoutingHandler getTestHandler() {
        return Handlers.routing().add(Methods.GET, "/v2/pet", exchange -> exchange.getResponseSender().send("OK"));
    }

    private static String encodeCredentialsFullFormat(String username, String password, String separator) {
        String cred;
        if(password != null) {
            cred = username + separator + password;
        } else {
            cred = username;
        }
        String encodedValue;
        byte[] encodedBytes = Base64.encodeBase64(cred.getBytes(UTF_8));
        encodedValue = new String(encodedBytes, UTF_8);
        return encodedValue;
    }

    private static String encodeCredentials(String username, String password) {
        return encodeCredentialsFullFormat(username, password, ":");
    }

    @Test
    public void testWithAnonymousWrongPath() throws Exception {
        final Http2Client client = Http2Client.getInstance();
        final CountDownLatch latch = new CountDownLatch(1);
        final ClientConnection connection;
        try {
            connection = client.connect(new URI("http://localhost:17352"), Http2Client.WORKER, Http2Client.SSL, Http2Client.BUFFER_POOL, OptionMap.EMPTY).get();
        } catch (Exception e) {
            throw new ClientException(e);
        }
        final AtomicReference<ClientResponse> reference = new AtomicReference<>();
        try {
            ClientRequest request = new ClientRequest().setPath("/v2/wrong").setMethod(Methods.GET);
            request.getRequestHeaders().put(Headers.HOST, "localhost");
            connection.sendRequest(request, client.createClientCallback(reference, latch));
            latch.await();
        } catch (Exception e) {
            logger.error("Exception: ", e);
            throw new ClientException(e);
        } finally {
            IoUtils.safeClose(connection);
        }
        int statusCode = reference.get().getResponseCode();
        String responseBody = reference.get().getAttachment(Http2Client.RESPONSE_BODY);
        Assert.assertEquals(401, statusCode);
        if(statusCode == 401) {
            Assert.assertNotNull(responseBody);
        }
    }

    @Test
    public void testWithAnonymousRightPath() throws Exception {
        final Http2Client client = Http2Client.getInstance();
        final CountDownLatch latch = new CountDownLatch(1);
        final ClientConnection connection;
        try {
            connection = client.connect(new URI("http://localhost:17352"), Http2Client.WORKER, Http2Client.SSL, Http2Client.BUFFER_POOL, OptionMap.EMPTY).get();
        } catch (Exception e) {
            throw new ClientException(e);
        }
        final AtomicReference<ClientResponse> reference = new AtomicReference<>();
        try {
            ClientRequest request = new ClientRequest().setPath("/v2/pet").setMethod(Methods.GET);
            request.getRequestHeaders().put(Headers.HOST, "localhost");
            connection.sendRequest(request, client.createClientCallback(reference, latch));
            latch.await();
        } catch (Exception e) {
            logger.error("Exception: ", e);
            throw new ClientException(e);
        } finally {
            IoUtils.safeClose(connection);
        }
        int statusCode = reference.get().getResponseCode();
        Assert.assertEquals(200, statusCode);
        if(statusCode == 200) {
            Assert.assertNotNull(reference.get().getAttachment(Http2Client.RESPONSE_BODY));
        }
    }

    @Test
    public void testAllowBearerAuth() throws Exception {
        final Http2Client client = Http2Client.getInstance();
        final CountDownLatch latch = new CountDownLatch(1);
        final ClientConnection connection;
        try {
            connection = client.connect(new URI("http://localhost:17352"), Http2Client.WORKER, Http2Client.SSL, Http2Client.BUFFER_POOL, OptionMap.EMPTY).get();
        } catch (Exception e) {
            throw new ClientException(e);
        }
        final AtomicReference<ClientResponse> reference = new AtomicReference<>();
        try {
            ClientRequest request = new ClientRequest().setPath("/v2/pet").setMethod(Methods.GET);
            request.getRequestHeaders().put(Headers.HOST, "localhost");
            request.getRequestHeaders().put(Headers.AUTHORIZATION, "Bearer token");
            connection.sendRequest(request, client.createClientCallback(reference, latch));
            latch.await();
        } catch (Exception e) {
            logger.error("Exception: ", e);
            throw new ClientException(e);
        } finally {
            IoUtils.safeClose(connection);
        }
        int statusCode = reference.get().getResponseCode();
        Assert.assertEquals(200, statusCode);
        if(statusCode == 200) {
            Assert.assertNotNull(reference.get().getAttachment(Http2Client.RESPONSE_BODY));
        }
    }

    @Test
    public void testAllowBearerAuthWrongPath() throws Exception {
        final Http2Client client = Http2Client.getInstance();
        final CountDownLatch latch = new CountDownLatch(1);
        final ClientConnection connection;
        try {
            connection = client.connect(new URI("http://localhost:17352"), Http2Client.WORKER, Http2Client.SSL, Http2Client.BUFFER_POOL, OptionMap.EMPTY).get();
        } catch (Exception e) {
            throw new ClientException(e);
        }
        final AtomicReference<ClientResponse> reference = new AtomicReference<>();
        try {
            ClientRequest request = new ClientRequest().setPath("/v2/wrong").setMethod(Methods.GET);
            request.getRequestHeaders().put(Headers.HOST, "localhost");
            request.getRequestHeaders().put(Headers.AUTHORIZATION, "Bearer token");
            connection.sendRequest(request, client.createClientCallback(reference, latch));
            latch.await();
        } catch (Exception e) {
            logger.error("Exception: ", e);
            throw new ClientException(e);
        } finally {
            IoUtils.safeClose(connection);
        }
        int statusCode = reference.get().getResponseCode();
        String responseBody = reference.get().getAttachment(Http2Client.RESPONSE_BODY);
        System.out.println("responseBody = " + responseBody);
        Assert.assertEquals(401, statusCode);
        if(statusCode == 401) {
            Assert.assertNotNull(responseBody);
        }
    }

}
