/*
 * Copyright 2020, OpenTelemetry Authors
 *
 * 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.
 */
import io.opentelemetry.auto.test.base.HttpClientTest
import org.apache.http.HttpHost
import org.apache.http.HttpRequest
import org.apache.http.HttpResponse
import org.apache.http.impl.client.DefaultHttpClient
import org.apache.http.message.BasicHeader
import org.apache.http.message.BasicHttpRequest
import org.apache.http.params.HttpConnectionParams
import org.apache.http.params.HttpParams
import org.apache.http.protocol.BasicHttpContext
import spock.lang.Shared
import spock.lang.Timeout

abstract class ApacheHttpClientTest<T extends HttpRequest> extends HttpClientTest {
  @Shared
  def client = new DefaultHttpClient()

  def setupSpec() {
    HttpParams httpParams = client.getParams()
    HttpConnectionParams.setConnectionTimeout(httpParams, CONNECT_TIMEOUT_MS)
    HttpConnectionParams.setSoTimeout(httpParams, READ_TIMEOUT_MS)
  }

  @Override
  int doRequest(String method, URI uri, Map<String, String> headers, Closure callback) {
    def request = createRequest(method, uri)
    headers.entrySet().each {
      request.addHeader(new BasicHeader(it.key, it.value))
    }

    def response = executeRequest(request, uri)
    callback?.call()
    response.entity?.content?.close() // Make sure the connection is closed.

    return response.statusLine.statusCode
  }

  abstract T createRequest(String method, URI uri)

  abstract HttpResponse executeRequest(T request, URI uri)

  static String fullPathFromURI(URI uri) {
    StringBuilder builder = new StringBuilder()
    if (uri.getPath() != null) {
      builder.append(uri.getPath())
    }

    if (uri.getQuery() != null) {
      builder.append('?')
      builder.append(uri.getQuery())
    }

    if (uri.getFragment() != null) {
      builder.append('#')
      builder.append(uri.getFragment())
    }
    return builder.toString()
  }
}

@Timeout(5)
class ApacheClientHostRequest extends ApacheHttpClientTest<BasicHttpRequest> {
  @Override
  BasicHttpRequest createRequest(String method, URI uri) {
    return new BasicHttpRequest(method, fullPathFromURI(uri))
  }

  @Override
  HttpResponse executeRequest(BasicHttpRequest request, URI uri) {
    return client.execute(new HttpHost(uri.getHost(), uri.getPort()), request)
  }

  @Override
  boolean testRemoteConnection() {
    return false
  }
}

@Timeout(5)
class ApacheClientHostRequestContext extends ApacheHttpClientTest<BasicHttpRequest> {
  @Override
  BasicHttpRequest createRequest(String method, URI uri) {
    return new BasicHttpRequest(method, fullPathFromURI(uri))
  }

  @Override
  HttpResponse executeRequest(BasicHttpRequest request, URI uri) {
    return client.execute(new HttpHost(uri.getHost(), uri.getPort()), request, new BasicHttpContext())
  }

  @Override
  boolean testRemoteConnection() {
    return false
  }
}

@Timeout(5)
class ApacheClientHostRequestResponseHandler extends ApacheHttpClientTest<BasicHttpRequest> {
  @Override
  BasicHttpRequest createRequest(String method, URI uri) {
    return new BasicHttpRequest(method, fullPathFromURI(uri))
  }

  @Override
  HttpResponse executeRequest(BasicHttpRequest request, URI uri) {
    return client.execute(new HttpHost(uri.getHost(), uri.getPort()), request, { response -> response })
  }

  @Override
  boolean testRemoteConnection() {
    return false
  }
}

@Timeout(5)
class ApacheClientHostRequestResponseHandlerContext extends ApacheHttpClientTest<BasicHttpRequest> {
  @Override
  BasicHttpRequest createRequest(String method, URI uri) {
    return new BasicHttpRequest(method, fullPathFromURI(uri))
  }

  @Override
  HttpResponse executeRequest(BasicHttpRequest request, URI uri) {
    return client.execute(new HttpHost(uri.getHost(), uri.getPort()), request, { response -> response }, new BasicHttpContext())
  }

  @Override
  boolean testRemoteConnection() {
    return false
  }
}

@Timeout(5)
class ApacheClientUriRequest extends ApacheHttpClientTest<HttpUriRequest> {
  @Override
  HttpUriRequest createRequest(String method, URI uri) {
    return new HttpUriRequest(method, uri)
  }

  @Override
  HttpResponse executeRequest(HttpUriRequest request, URI uri) {
    return client.execute(request)
  }
}

@Timeout(5)
class ApacheClientUriRequestContext extends ApacheHttpClientTest<HttpUriRequest> {
  @Override
  HttpUriRequest createRequest(String method, URI uri) {
    return new HttpUriRequest(method, uri)
  }

  @Override
  HttpResponse executeRequest(HttpUriRequest request, URI uri) {
    return client.execute(request, new BasicHttpContext())
  }
}

@Timeout(5)
class ApacheClientUriRequestResponseHandler extends ApacheHttpClientTest<HttpUriRequest> {
  @Override
  HttpUriRequest createRequest(String method, URI uri) {
    return new HttpUriRequest(method, uri)
  }

  @Override
  HttpResponse executeRequest(HttpUriRequest request, URI uri) {
    return client.execute(request, { response -> response })
  }
}

@Timeout(5)
class ApacheClientUriRequestResponseHandlerContext extends ApacheHttpClientTest<HttpUriRequest> {
  @Override
  HttpUriRequest createRequest(String method, URI uri) {
    return new HttpUriRequest(method, uri)
  }

  @Override
  HttpResponse executeRequest(HttpUriRequest request, URI uri) {
    return client.execute(request, { response -> response })
  }
}