/*
 * Copyright 2012-2014 eBay Software Foundation and selendroid committers.
 * 
 * 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.
 */
package io.selendroid.server.handler;

import io.selendroid.server.common.Response;
import io.selendroid.server.common.SelendroidResponse;
import io.selendroid.server.common.http.HttpRequest;
import io.selendroid.server.model.AndroidElement;
import io.selendroid.server.model.By;
import io.selendroid.server.model.internal.NativeAndroidBySelector;
import io.selendroid.server.util.SelendroidLogger;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.List;

public class FindChildElements extends SafeRequestHandler {

  public FindChildElements(String mappedUri) {
    super(mappedUri);
  }

  @Override
  public Response safeHandle(HttpRequest request) throws JSONException{
    JSONObject payload = getPayload(request);
    String method = payload.getString("using");
    String selector = payload.getString("value");
    SelendroidLogger.info(String.format("find child element command using %s with selector %s.",
            method, selector));
    String elementId = getElementId(request);
    AndroidElement root = getElementFromCache(request, elementId);
    By by = new NativeAndroidBySelector().pickFrom(method, selector);
    List<AndroidElement> elements = root.findElements(by);

    JSONArray result = new JSONArray();
    for (AndroidElement element : elements) {
      JSONObject jsonElement = new JSONObject();
      String id = getIdOfKnownElement(request, element);
      if (id == null) {
        continue;
      }
      jsonElement.put("ELEMENT", id);
      result.put(jsonElement);
    }
    return new SelendroidResponse(getSessionId(request), result);
  }
}
