/*-
 * ============LICENSE_START=======================================================
 * ONAP-PAP-REST
 * ================================================================================
 * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.policy.pap.xacml.rest.controller;

import java.io.IOException;
import java.util.Date;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.onap.policy.pap.xacml.rest.util.DictionaryUtils;
import org.onap.policy.rest.dao.CommonClassDao;
import org.onap.policy.rest.jpa.ActionPolicyDict;
import org.onap.policy.rest.jpa.UserInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

@Controller
public class ActionPolicyDictionaryController {
	
	private static CommonClassDao commonClassDao;
	private static String operation = "operation";
	private static String attributeName = "attributeName";
	private static String actionDatas = "actionPolicyDictionaryDatas";
	
	@Autowired
	public ActionPolicyDictionaryController(CommonClassDao commonClassDao){
		ActionPolicyDictionaryController.commonClassDao = commonClassDao;
	}
	
	public void setCommonClassDao(CommonClassDao commonClassDao){
		ActionPolicyDictionaryController.commonClassDao = commonClassDao;
	}
		
	public ActionPolicyDictionaryController(){
		super();
	}

	private DictionaryUtils getDictionaryUtilsInstance(){
		return DictionaryUtils.dictionaryUtils != null ? DictionaryUtils.getDictionaryUtils() : new DictionaryUtils();
	}
	
	@RequestMapping(value={"/get_ActionPolicyDictDataByName"}, method={RequestMethod.GET} , produces=MediaType.APPLICATION_JSON_VALUE)
	public void getActionEntitybyName(HttpServletResponse response){
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.getDataByEntity(response, actionDatas, attributeName, ActionPolicyDict.class);
	}

	@RequestMapping(value={"/get_ActionPolicyDictData"}, method={RequestMethod.GET} , produces=MediaType.APPLICATION_JSON_VALUE)
	public void getActionPolicyDictionaryEntityData(HttpServletResponse response){
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.getData(response, actionDatas, ActionPolicyDict.class);
	}

	@RequestMapping(value={"/action_dictionary/save_ActionDict"}, method={RequestMethod.POST})
	public ModelAndView saveActionPolicyDictionary(HttpServletRequest request, HttpServletResponse response) throws IOException{
		DictionaryUtils utils = getDictionaryUtilsInstance();
		try {
			boolean fromAPI = utils.isRequestFromAPI(request);
			ObjectMapper mapper = new ObjectMapper();
			mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
			JsonNode root = mapper.readTree(request.getReader());
			ActionPolicyDict actionPolicyDict = null;
			ActionAdapter adapter = null;
			String userId = null;
			if(fromAPI){
				actionPolicyDict = mapper.readValue(root.get("dictionaryFields").toString(), ActionPolicyDict.class);
				adapter = mapper.readValue(root.get("dictionaryFields").toString(), ActionAdapter.class);
				userId = "API";
			}else{
				actionPolicyDict = mapper.readValue(root.get("actionPolicyDictionaryData").toString(), ActionPolicyDict.class);
				adapter = mapper.readValue(root.get("actionPolicyDictionaryData").toString(), ActionAdapter.class);
				userId = root.get("userid").textValue();
			}
			UserInfo userInfo = utils.getUserInfo(userId);
			
			List<Object> duplicateData =  commonClassDao.checkDuplicateEntry(actionPolicyDict.getAttributeName(), attributeName, ActionPolicyDict.class);
			boolean duplicateflag = false;
			if(!duplicateData.isEmpty()){
				ActionPolicyDict data = (ActionPolicyDict) duplicateData.get(0);
				if(request.getParameter(operation) != null && "update".equals(request.getParameter(operation))){
					actionPolicyDict.setId(data.getId());
				}else if((request.getParameter(operation) != null && !"update".equals(request.getParameter(operation))) || 
						(request.getParameter(operation) == null && (data.getId() != actionPolicyDict.getId()))){
					duplicateflag = true;
				}
			}
			actionPolicyDict.setHeader(utils.appendKeyValue(adapter.getHeaders(), ":", "="));
			
			String responseString = null;
			if(!duplicateflag){
				actionPolicyDict.setUserModifiedBy(userInfo);
				if(actionPolicyDict.getId() == 0){
					actionPolicyDict.setUserCreatedBy(userInfo);
					commonClassDao.save(actionPolicyDict);
				}else{
					actionPolicyDict.setModifiedDate(new Date());
					commonClassDao.update(actionPolicyDict); 
				} 
				responseString = mapper.writeValueAsString(commonClassDao.getData(ActionPolicyDict.class));
			}else{
				responseString = "Duplicate";
			}
			if(fromAPI){
				return utils.getResultForApi(responseString);
			}else{
				utils.setResponseData(response, actionDatas, responseString);
			}
		}catch(Exception e){
			utils.setErrorResponseData(response, e);
		}
		return null;
	}

	@RequestMapping(value={"/action_dictionary/remove_actionPolicyDict"}, method={RequestMethod.POST})
	public void removeActionPolicyDictionary(HttpServletRequest request, HttpServletResponse response) throws IOException {
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.removeData(request, response, actionDatas, ActionPolicyDict.class);
	}
}

class ActionAdapter{
	private List<Object> headers;

	public List<Object> getHeaders() {
		return headers;
	}

	public void setHeaders(List<Object> headers) {
		this.headers = headers;
	}
}