/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2014 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.tooling.commons.packmgr.httpaction;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.regex.Pattern;
  
  import org.apache.http.HttpStatus;
  import org.apache.http.client.methods.CloseableHttpResponse;
  import org.apache.http.client.methods.HttpGet;
  import org.apache.http.client.protocol.HttpClientContext;
  import org.apache.http.impl.client.CloseableHttpClient;
  import org.apache.http.util.EntityUtils;
  import org.json.JSONException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import io.wcm.tooling.commons.packmgr.PackageManagerHttpActionException;
  
  /**
   * Get bundle status from web console.
   */
  public final class BundleStatusCall implements HttpCall<BundleStatus> {
  
    private final CloseableHttpClient httpClient;
    private final HttpClientContext context;
    private final String bundleStatusURL;
    private final List<Pattern> bundleStatusWhitelistBundleNames;
  
    private static final Logger log = LoggerFactory.getLogger(BundleStatusCall.class);
  
    /**
     * @param httpClient HTTP client
     * @param context HTTP client context
     * @param bundleStatusURL Bundle status URL
     * @param bundleStatusWhitelistBundleNames Patterns of bundle names to be ignored
     */
    public BundleStatusCall(CloseableHttpClient httpClient, HttpClientContext context, String bundleStatusURL,
        List<Pattern> bundleStatusWhitelistBundleNames) {
      this.httpClient = httpClient;
      this.context = context;
      this.bundleStatusURL = bundleStatusURL;
      this.bundleStatusWhitelistBundleNames = bundleStatusWhitelistBundleNames;
    }
  
    @Override
    public BundleStatus execute() {
      log.debug("Call URL: {}", bundleStatusURL);
  
      HttpGet method = new HttpGet(bundleStatusURL);
      try (CloseableHttpResponse response = httpClient.execute(method, context)) {
  
        String responseString = EntityUtils.toString(response.getEntity());
        if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
          throw PackageManagerHttpActionException.forHttpError(bundleStatusURL, response.getStatusLine(), responseString);
        }
  
        return toBundleStatus(responseString);
      }
      catch (IOException ex) {
        throw PackageManagerHttpActionException.forIOException(bundleStatusURL, ex);
      }
    }
  
    private BundleStatus toBundleStatus(String jsonString) {
      try {
        BundleStatusParser parser = new BundleStatusParser(bundleStatusWhitelistBundleNames);
        return parser.parse(jsonString);
      }
      catch (JSONException ex) {
        throw PackageManagerHttpActionException.forJSONException(bundleStatusURL, jsonString, ex);
      }
    }
  
  }