/*-
 * ============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.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.onap.policy.pap.xacml.rest.util.DictionaryUtils;
import org.onap.policy.rest.dao.CommonClassDao;
import org.onap.policy.rest.jpa.Attribute;
import org.onap.policy.rest.jpa.OnapName;
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 DictionaryController {
	
	private static final Log LOGGER	= LogFactory.getLog(DictionaryController.class);

	private static CommonClassDao commonClassDao;
	private static String xacmlId = "xacmlId";
	private static String operation = "operation";
	private static String dictionaryFields ="dictionaryFields";
	private static String duplicateResponseString = "Duplicate";
	private static String onapName = "onapName";
	private static String attributeDatas = "attributeDictionaryDatas";
	private static String onapNameDatas = "onapNameDictionaryDatas";
	
	@Autowired
	public DictionaryController(CommonClassDao commonClassDao){
		DictionaryController.commonClassDao = commonClassDao;
	}

	public DictionaryController(){
		super();
	}
	
	private DictionaryUtils getDictionaryUtilsInstance(){
		return DictionaryUtils.dictionaryUtils != null ? DictionaryUtils.getDictionaryUtils() : new DictionaryUtils();
	}
	
	@RequestMapping(value={"/get_AttributeDatabyAttributeName"}, method={RequestMethod.GET} , produces=MediaType.APPLICATION_JSON_VALUE)
	public void getAttributeDictionaryEntityDatabyAttributeName(HttpServletResponse response){
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.getDataByEntity(response, attributeDatas, xacmlId, Attribute.class);
	}
	
	//Attribute Dictionary
	@RequestMapping(value="/get_AttributeData", method= RequestMethod.GET , produces=MediaType.APPLICATION_JSON_VALUE)
	public void getAttributeDictionaryEntityData(HttpServletResponse response){
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.getData(response, attributeDatas, Attribute.class);
	}
	
	@RequestMapping(value={"/attribute_dictionary/save_attribute"}, method={RequestMethod.POST})
	public ModelAndView saveAttributeDictionary(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());
			Attribute attributeData = null;
			AttributeValues attributeValueData = null;
			String userId = null;
			if(fromAPI){
				attributeData = mapper.readValue(root.get(dictionaryFields).toString(), Attribute.class);
				attributeValueData = mapper.readValue(root.get(dictionaryFields).toString(), AttributeValues.class);
				userId = "API";
			}else{
				attributeData = mapper.readValue(root.get("attributeDictionaryData").toString(), Attribute.class);
				attributeValueData = mapper.readValue(root.get("attributeDictionaryData").toString(), AttributeValues.class);
				userId = root.get("userid").textValue();
			}
			UserInfo userInfo = utils.getUserInfo(userId);
			List<Object> duplicateData =  commonClassDao.checkDuplicateEntry(attributeData.getXacmlId(), xacmlId, Attribute.class);
			boolean duplicateflag = false;
			if(!duplicateData.isEmpty()){
				Attribute data = (Attribute) duplicateData.get(0);
				if(request.getParameter(operation) != null && "update".equals(request.getParameter(operation))){
					attributeData.setId(data.getId());
				}else if((request.getParameter(operation) != null && !"update".equals(request.getParameter(operation))) || 
						(request.getParameter(operation) == null && (data.getId() != attributeData.getId()))){
					duplicateflag = true;
				}
			}
			if(attributeValueData.getUserDataTypeValues() != null && !attributeValueData.getUserDataTypeValues().isEmpty()){
				attributeData.setAttributeValue(utils.appendKey(attributeValueData.getUserDataTypeValues(), "attributeValues", ","));
			}
			
			if(attributeData.getDatatypeBean().getShortName() != null){
				String datatype = attributeData.getDatatypeBean().getShortName();	
				attributeData.setDatatypeBean(utils.getDataType(datatype));
			}

			String responseString = null;
			if(!duplicateflag){
				attributeData.setUserModifiedBy(userInfo);
				if(attributeData.getId() == 0){
					attributeData.setCategoryBean(utils.getCategory());
					attributeData.setUserCreatedBy(userInfo);
					commonClassDao.save(attributeData);
				}else{
					attributeData.setModifiedDate(new Date());
					commonClassDao.update(attributeData); 
				} 
				responseString = mapper.writeValueAsString(commonClassDao.getData(Attribute.class));
			}else{
				responseString = duplicateResponseString;
			}
			if(fromAPI){
				return utils.getResultForApi(responseString);
			}else{
				utils.setResponseData(response, attributeDatas, responseString);
			}
		}catch (Exception e){
			utils.setErrorResponseData(response, e);
		}
		return null;
	}

	@RequestMapping(value={"/attribute_dictionary/remove_attribute"}, method={RequestMethod.POST})
	public void removeAttributeDictionary(HttpServletRequest request, HttpServletResponse response)throws IOException {
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.removeData(request, response, attributeDatas, Attribute.class);
	}
	
	//OnapName Dictionary
	@RequestMapping(value={"/get_OnapNameDataByName"}, method={RequestMethod.GET} , produces=MediaType.APPLICATION_JSON_VALUE)
	public void getOnapNameDictionaryByNameEntityData(HttpServletResponse response){
		LOGGER.info("get_OnapNameDataByName is called");
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.getDataByEntity(response, onapNameDatas, onapName, OnapName.class);
	}
	
	@RequestMapping(value={"/get_OnapNameData"}, method={RequestMethod.GET} , produces=MediaType.APPLICATION_JSON_VALUE)
	public void getOnapNameDictionaryEntityData(HttpServletResponse response){
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.getData(response, onapNameDatas, OnapName.class);
	}

	@RequestMapping(value={"/onap_dictionary/save_onapName"}, method={RequestMethod.POST})
	public ModelAndView saveOnapDictionary(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());
			OnapName onapData;
			String userId = null;
			if(fromAPI){
				onapData = mapper.readValue(root.get(dictionaryFields).toString(), OnapName.class);
				userId = "API";
			}else{
				onapData = mapper.readValue(root.get("onapNameDictionaryData").toString(), OnapName.class);
				userId = root.get("userid").textValue();
			}
			UserInfo userInfo = utils.getUserInfo(userId);
			
			List<Object> duplicateData =  commonClassDao.checkDuplicateEntry(onapData.getOnapName(), onapName, OnapName.class);
			boolean duplicateflag = false;
			if(!duplicateData.isEmpty()){
				OnapName data = (OnapName) duplicateData.get(0);
				if(request.getParameter(operation) != null && "update".equals(request.getParameter(operation))){
					onapData.setId(data.getId());
				}else if((request.getParameter(operation) != null && !"update".equals(request.getParameter(operation))) || 
						(request.getParameter(operation) == null && (data.getId() != onapData.getId()))){
					duplicateflag = true;
				}
			}
			String responseString = null;
			if(!duplicateflag){
				onapData.setUserModifiedBy(userInfo);
				if(onapData.getId() == 0){
					onapData.setUserCreatedBy(userInfo);
					commonClassDao.save(onapData);
				}else{
					onapData.setModifiedDate(new Date());
					commonClassDao.update(onapData); 
				} 
				responseString = mapper.writeValueAsString(commonClassDao.getData(OnapName.class));
			}else{
				responseString = duplicateResponseString;
			}
			if(fromAPI){
				return utils.getResultForApi(responseString);
			}else{
				utils.setResponseData(response, onapNameDatas, responseString);
			}
		}catch (Exception e){
			utils.setErrorResponseData(response, e);
		}
		return null;
	}

	@RequestMapping(value={"/onap_dictionary/remove_onap"}, method={RequestMethod.POST})
	public void removeOnapDictionary(HttpServletRequest request, HttpServletResponse response) throws IOException {
		DictionaryUtils utils = getDictionaryUtilsInstance();
		utils.removeData(request, response, onapNameDatas, OnapName.class);
	}
}

class AttributeValues{
	private List<Object> userDataTypeValues;

	public List<Object> getUserDataTypeValues() {
		return userDataTypeValues;
	}

	public void setUserDataTypeValues(List<Object> userDataTypeValues) {
		this.userDataTypeValues = userDataTypeValues;
	}
}