/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.eventhook.handlers;

import lombok.extern.slf4j.Slf4j;
import org.apache.http.client.HttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.hisp.dhis.eventhook.Event;
import org.hisp.dhis.eventhook.EventHook;
import org.hisp.dhis.eventhook.Handler;
import org.hisp.dhis.eventhook.targets.WebhookTarget;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;

/**
 * @author Morten Olav Hansen
 */
@Slf4j
public class WebhookHandler implements Handler {
  private final WebhookTarget webhookTarget;

  private final RestTemplate restTemplate;

  public WebhookHandler(WebhookTarget target) {
    this.webhookTarget = target;
    this.restTemplate = new RestTemplate();
    configure(this.restTemplate);
  }

  @Override
  public void run(EventHook eventHook, Event event, String payload) {
    HttpHeaders httpHeaders = new HttpHeaders();
    httpHeaders.setContentType(MediaType.parseMediaType(webhookTarget.getContentType()));
    httpHeaders.setAll(webhookTarget.getHeaders());

    if (webhookTarget.getAuth() != null) {
      webhookTarget.getAuth().apply(httpHeaders);
    }

    HttpEntity<String> httpEntity = new HttpEntity<>(payload, httpHeaders);

    try {
      ResponseEntity<String> response =
          restTemplate.postForEntity(webhookTarget.getUrl(), httpEntity, String.class);

      log.info(
          "EventHook '{}' response status '{}' and body: {}",
          eventHook.getUid(),
          response.getStatusCode().name(),
          response.getBody());
    } catch (RestClientException ex) {
      log.error(ex.getMessage());
    }
  }

  private void configure(RestTemplate template) {
    HttpComponentsClientHttpRequestFactory requestFactory =
        new HttpComponentsClientHttpRequestFactory();

    requestFactory.setConnectionRequestTimeout(1_000);
    requestFactory.setConnectTimeout(5_000);
    requestFactory.setReadTimeout(10_000);
    requestFactory.setBufferRequestBody(true);

    HttpClient httpClient = HttpClientBuilder.create().disableCookieManagement().build();

    requestFactory.setHttpClient(httpClient);

    template.setRequestFactory(requestFactory);
  }
}
