/**
 * 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.jooby.internal.ftl;

import java.util.Map;

import org.jooby.Request;
import org.jooby.Session;

import com.typesafe.config.Config;
import com.typesafe.config.ConfigObject;

import freemarker.template.DefaultMapAdapter;
import freemarker.template.ObjectWrapper;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;
import freemarker.template.utility.ObjectWrapperWithAPISupport;

public class FtlWrapper implements ObjectWrapper {

  private ObjectWrapper wrapper;

  public FtlWrapper(final ObjectWrapper wrapper) {
    this.wrapper = wrapper;
  }

  @Override
  public TemplateModel wrap(final Object obj) throws TemplateModelException {
    if (obj instanceof Config) {
      ConfigObject config = ((Config) obj).root();
      return DefaultMapAdapter.adapt(config.unwrapped(), (ObjectWrapperWithAPISupport) wrapper);
    }
    if (obj instanceof Request) {
      Map<String, Object> req = ((Request) obj).attributes();
      return DefaultMapAdapter.adapt(req, (ObjectWrapperWithAPISupport) wrapper);
    }
    if (obj instanceof Session) {
      Map<String, String> session = ((Session) obj).attributes();
      return DefaultMapAdapter.adapt(session, (ObjectWrapperWithAPISupport) wrapper);
    }
    return wrapper.wrap(obj);
  }

}
