/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.brooklyn.rest.testing;

import static org.testng.Assert.assertTrue;

import java.net.URI;
import java.util.Collection;
import java.util.concurrent.Callable;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;

import javax.ws.rs.core.MediaType;

import org.codehaus.jackson.map.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.apache.brooklyn.api.entity.Application;
import org.apache.brooklyn.core.entity.Entities;
import org.apache.brooklyn.rest.domain.ApplicationSpec;
import org.apache.brooklyn.rest.domain.ApplicationSummary;
import org.apache.brooklyn.rest.domain.Status;
import org.apache.brooklyn.util.exceptions.Exceptions;
import org.apache.brooklyn.util.repeat.Repeater;
import org.apache.brooklyn.util.time.Duration;

import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.UniformInterfaceException;
import com.sun.jersey.spi.inject.Errors;

public abstract class BrooklynRestResourceTest extends BrooklynRestApiTest {

    private static final Logger log = LoggerFactory.getLogger(BrooklynRestResourceTest.class);
    
    @BeforeClass(alwaysRun = true)
    public void setUp() throws Exception {
        // need this to debug jersey inject errors
        java.util.logging.Logger.getLogger(Errors.class.getName()).setLevel(Level.INFO);

        setUpJersey();
    }

    @Override
    @AfterClass(alwaysRun = true)
    public void tearDown() throws Exception {
        tearDownJersey();
        super.tearDown();
    }


    protected ClientResponse clientDeploy(ApplicationSpec spec) {
        try {
            // dropwizard TestClient won't skip deserialization of trivial things like string and byte[] and inputstream
            // if we pass in an object it serializes, so we have to serialize things ourselves
            return client().resource("/v1/applications")
                .entity(new ObjectMapper().writer().writeValueAsBytes(spec), MediaType.APPLICATION_OCTET_STREAM)
                .post(ClientResponse.class);
        } catch (Exception e) {
            throw Exceptions.propagate(e);
        }
    }
    
    protected void waitForApplicationToBeRunning(final URI applicationRef) {
        waitForApplicationToBeRunning(applicationRef, Duration.minutes(3));
    }
    protected void waitForApplicationToBeRunning(final URI applicationRef, Duration timeout) {
        if (applicationRef==null)
            throw new NullPointerException("No application URI available (consider using BrooklynRestResourceTest.clientDeploy)");
        
        boolean started = Repeater.create("Wait for application startup")
                .until(new Callable<Boolean>() {
                    @Override
                    public Boolean call() throws Exception {
                        Status status = getApplicationStatus(applicationRef);
                        if (status == Status.ERROR) {
                            Assert.fail("Application failed with ERROR");
                        }
                        return status == Status.RUNNING;
                    }
                })
                .backoffTo(Duration.ONE_SECOND)
                .limitTimeTo(timeout)
                .run();
        
        if (!started) {
            log.warn("Did not start application "+applicationRef+":");
            Collection<Application> apps = getManagementContext().getApplications();
            for (Application app: apps)
                Entities.dumpInfo(app);
        }
        assertTrue(started);
    }

    protected Status getApplicationStatus(URI uri) {
        return client().resource(uri).get(ApplicationSummary.class).getStatus();
    }

    protected void waitForPageFoundResponse(final String resource, final Class<?> clazz) {
        boolean found = Repeater.create("Wait for page found")
                .until(new Callable<Boolean>() {
                    @Override
                    public Boolean call() throws Exception {
                        try {
                            client().resource(resource).get(clazz);
                            return true;
                        } catch (UniformInterfaceException e) {
                            return false;
                        }
                    }
                })
                .every(1, TimeUnit.SECONDS)
                .limitTimeTo(30, TimeUnit.SECONDS)
                .run();
        assertTrue(found);
    }
    
    protected void waitForPageNotFoundResponse(final String resource, final Class<?> clazz) {
        boolean success = Repeater.create("Wait for page not found")
                .until(new Callable<Boolean>() {
                    @Override
                    public Boolean call() throws Exception {
                        try {
                            client().resource(resource).get(clazz);
                            return false;
                        } catch (UniformInterfaceException e) {
                            return e.getResponse().getStatus() == 404;
                        }
                    }
                })
                .every(1, TimeUnit.SECONDS)
                .limitTimeTo(30, TimeUnit.SECONDS)
                .run();
        assertTrue(success);
    }
}