/*
 * 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.solr.request;

import java.security.Principal;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Objects;

import org.apache.solr.common.params.CommonParams;
import org.apache.solr.common.params.MultiMapSolrParams;
import org.apache.solr.common.params.SolrParams;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.core.SolrCore;

// With the addition of SolrParams, this class isn't needed for much anymore... it's currently
// retained more for backward compatibility.

/**
 *
 */
public class LocalSolrQueryRequest extends SolrQueryRequestBase {
  public final static Map emptyArgs = new HashMap(0,1);
  
  public String userPrincipalName = null;
  
  protected static SolrParams makeParams(String query, String qtype, int start, int limit, Map args) {
    Map<String,String[]> map = new HashMap<>();
    for (Iterator iter = args.entrySet().iterator(); iter.hasNext();) {
      Map.Entry e = (Map.Entry)iter.next();
      String k = e.getKey().toString();
      Object v = e.getValue();
      if (v instanceof String[]) map.put(k,(String[])v);
      else map.put(k,new String[]{v.toString()});
    }
    if (query!=null) map.put(CommonParams.Q, new String[]{query});
    if (qtype!=null) map.put(CommonParams.QT, new String[]{qtype});
    map.put(CommonParams.START, new String[]{Integer.toString(start)});
    map.put(CommonParams.ROWS, new String[]{Integer.toString(limit)});
    return new MultiMapSolrParams(map);
  }

  public LocalSolrQueryRequest(SolrCore core, String query, String qtype, int start, int limit, Map args) {
    super(core,makeParams(query,qtype,start,limit,args));
  }

  public LocalSolrQueryRequest(SolrCore core, NamedList args) {
    super(core, args.toSolrParams());
  }

  public LocalSolrQueryRequest(SolrCore core, Map<String,String[]> args) {
    super(core, new MultiMapSolrParams(args));
  }
  
  public LocalSolrQueryRequest(SolrCore core, SolrParams args) {
    super(core, args);
  }

  @Override public Principal getUserPrincipal() {
    return new LocalPrincipal(this.userPrincipalName);
  }
  
  /** 
   * Allows setting the 'name' of the User Principal for the purposes of creating local requests
   * in a solr node when security is enabled.  It is experiemental and subject to removal
   *
   * @see org.apache.solr.security.PKIAuthenticationPlugin#NODE_IS_USER
   * @see #getUserPrincipal
   * @lucene.internal
   * @lucene.experimental
   */
  public void setUserPrincipalName(String s) {
    this.userPrincipalName = s;
  }
  private final class LocalPrincipal implements Principal {
    private final String user;
    public LocalPrincipal(String user) {
      this.user = user;
    }
    public String getName() {
      return user;
    }
    @Override public int hashCode() {
      return Objects.hashCode(user);
    }
    @Override public boolean equals(Object other) {
      return Objects.equals(this.getClass(), other.getClass())
        && Objects.equals(this.getName(), ((LocalPrincipal)other).getName() );
    }
  }
}