/*
    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2019 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.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import java.util.regex.Pattern;
  
  import org.apache.commons.lang3.StringUtils;
  import org.json.JSONArray;
  import org.json.JSONObject;
  
  /**
   * Parses bundle status JSON response.
   */
  final class BundleStatusParser {
  
    private final List<Pattern> bundleStatusWhitelistBundleNames;
  
    BundleStatusParser(List<Pattern> bundleStatusWhitelistBundleNames) {
      this.bundleStatusWhitelistBundleNames = bundleStatusWhitelistBundleNames;
    }
  
    BundleStatus parse(String jsonString) {
      JSONObject json = new JSONObject(jsonString);
  
      String statusLine = json.getString("status");
  
      // get bundle stats
      int total = 0;
      int active = 0;
      int activeFragment = 0;
      int resolved = 0;
      int installed = 0;
      int ignored = 0;
  
      // get list of all bundle names
      Set<String> bundleSymbolicNames = new HashSet<>();
      JSONArray data = json.getJSONArray("data");
      for (int i = 0; i < data.length(); i++) {
        JSONObject item = data.getJSONObject(i);
  
        String symbolicName = item.optString("symbolicName");
        String state = item.optString("state");
        boolean fragment = item.optBoolean("fragment");
        boolean whitelisted = isWhitelisted(symbolicName);
  
        total++;
        if (fragment) {
          activeFragment++;
        }
        else if (isActive(state)) {
          active++;
        }
        else if (isResolved(state)) {
          if (whitelisted) {
            ignored++;
          }
          else {
            resolved++;
          }
        }
        else if (isInstalled(state)) {
          if (whitelisted) {
            ignored++;
          }
          else {
            installed++;
          }
        }
  
        if (StringUtils.isNotBlank(symbolicName) && !whitelisted) {
          bundleSymbolicNames.add(symbolicName);
        }
      }
  
      return new BundleStatus(
          statusLine,
          total, active, activeFragment, resolved, installed, ignored,
          bundleSymbolicNames);
    }
 
   private boolean isActive(String actual) {
     return StringUtils.equalsIgnoreCase(actual, "Active");
   }
 
   private boolean isResolved(String actual) {
     return StringUtils.equalsIgnoreCase(actual, "Resolved");
   }
 
   private boolean isInstalled(String actual) {
     return StringUtils.equalsIgnoreCase(actual, "Installed");
   }
 
   private boolean isWhitelisted(String symbolicName) {
     for (Pattern pattern : bundleStatusWhitelistBundleNames) {
       if (pattern.matcher(symbolicName).matches()) {
         return true;
       }
     }
     return false;
   }
 
 }