/*-
 * ============LICENSE_START=======================================================
 * ONAP Policy Engine
 * ================================================================================
 * Copyright (C) 2017, 2019 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.controller;

/*
 *
 * */
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ArrayNode;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

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

import org.json.JSONObject;
import org.onap.policy.common.logging.flexlogger.FlexLogger;
import org.onap.policy.common.logging.flexlogger.Logger;
import org.onap.policy.rest.dao.CommonClassDao;
import org.onap.policy.rest.jpa.WatchPolicyNotificationTable;
import org.onap.policy.utils.PolicyUtils;
import org.onap.portalsdk.core.controller.RestrictedBaseController;
import org.onap.portalsdk.core.web.support.UserUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping({"/"})
public class PolicyNotificationController extends RestrictedBaseController {
    private static Logger logger = FlexLogger.getLogger(PolicyNotificationController.class);

    @Autowired
    CommonClassDao commonClassDao;

    /**
     * watchPolicy.
     *
     * @param request HttpServletRequest
     * @param response HttpServletResponse
     * @return ModelAndView
     * @throws IOException IOException
     */
    @RequestMapping(value = {"/watchPolicy"}, method = {org.springframework.web.bind.annotation.RequestMethod.POST})
    public ModelAndView watchPolicy(HttpServletRequest request, HttpServletResponse response) throws IOException {
        StringBuilder path = new StringBuilder();
        String responseValue = "";
        try {
            String userId = UserUtils.getUserSession(request).getOrgUserId();
            logger.info("userid info: " + userId);
            ObjectMapper mapper = new ObjectMapper();
            mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
            JsonNode root = mapper.readTree(request.getReader());
            String name = root.get("watchData").get("name").toString();
            JsonNode pathList = root.get("watchData").get("path");
            String finalName;
            if (pathList.isArray()) {
                ArrayNode arrayNode = (ArrayNode) pathList;
                for (int i = 0; i < arrayNode.size(); i++) {
                    JsonNode individualElement = arrayNode.get(i);
                    if (i == 0) {
                        path.append(individualElement.toString().replace("\"", "").trim());
                    } else {
                        path.append(File.separator + individualElement.toString().replace("\"", "").trim());
                    }
                }
            }

            if (pathList.size() > 0) {
                finalName = path + File.separator + name.replace("\"", "").trim();
            } else {
                finalName = name.replace("\"", "").trim();
            }
            if (finalName.contains("\\")) {
                finalName = finalName.replace("\\", "\\\\");
            }
            String query = "from WatchPolicyNotificationTable where POLICYNAME = :finalName and LOGINIDS = :userId";
            SimpleBindings params = new SimpleBindings();
            params.put("finalName", finalName);
            params.put("userId", userId);
            List<Object> watchList = commonClassDao.getDataByQuery(query, params);
            if (watchList.isEmpty()) {
                if (finalName.contains("\\\\")) {
                    finalName = finalName.replace("\\\\", File.separator);
                }
                WatchPolicyNotificationTable watch = new WatchPolicyNotificationTable();
                watch.setPolicyName(finalName);
                watch.setLoginIds(userId);
                commonClassDao.save(watch);
                responseValue = "You have Subscribed Successfully";
            } else {
                commonClassDao.delete(watchList.get(0));
                responseValue = "You have UnSubscribed Successfully";
            }

            response.setCharacterEncoding("UTF-8");
            response.setContentType("application / json");
            request.setCharacterEncoding("UTF-8");

            response.getWriter().write(new JSONObject("{watchData: "
                    + mapper.writeValueAsString(responseValue) + "}").toString());
        } catch (Exception e) {
            response.setCharacterEncoding("UTF-8");
            request.setCharacterEncoding("UTF-8");
            logger.error("Error druing watchPolicy function " + e);
            PrintWriter out = response.getWriter();
            out.write(PolicyUtils.CATCH_EXCEPTION);
        }
        return null;
    }
}