/*-
 * ============LICENSE_START=======================================================
 * VID
 * ================================================================================
 * Copyright (C) 2017 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.vid.controller;

import org.onap.portalsdk.core.controller.UnRestrictedBaseController;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.onap.portalsdk.core.util.SystemProperties;
import org.onap.vid.dao.FnAppDoaImpl;
import org.onap.vid.model.GitRepositoryState;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

import static org.springframework.http.HttpStatus.INTERNAL_SERVER_ERROR;
import static org.springframework.http.HttpStatus.OK;

/**
 * Controller for user profile view. The view is restricted to authenticated
 * users. The view name resolves to page user_profile.jsp which uses Angular.
 */

@RestController
@RequestMapping("/")
public class HealthCheckController extends UnRestrictedBaseController {

    private static final EELFLoggerDelegate LOGGER = EELFLoggerDelegate.getLogger(HealthCheckController.class);
    private static final DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss:SSSS");
    private static final String GIT_PROPERTIES_FILENAME = "git.properties";
    private FnAppDoaImpl fnAppDoaImpl;

    @Autowired
    public HealthCheckController(FnAppDoaImpl fnAppDoaImpl) {
        this.fnAppDoaImpl = fnAppDoaImpl;
    }

    /**
     * Obtain the HealthCheck Status from the System.Properties file.
     * Used by IDNS for redundancy
     *
     * @return ResponseEntity The response entity
     */
    @RequestMapping(value = "/healthCheck", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public HealthStatus getHealthCheckStatusForIDNS() {
        return createCorrespondingStatus();
    }

    /**
     * Obtain the  HealthCheck Status from the System.Properties file.
     *
     * @return ResponseEntity The response entity
     */
    @RequestMapping(value = "rest/healthCheck/{User-Agent}/{X-ECOMP-RequestID}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public HealthStatus getHealthCheck(
            @PathVariable("User-Agent") String UserAgent,
            @PathVariable("X-ECOMP-RequestID") String ECOMPRequestID) {
        LOGGER.debug(EELFLoggerDelegate.debugLogger, "User-Agent ", UserAgent);
        LOGGER.debug(EELFLoggerDelegate.debugLogger, "X-ECOMP-RequestID ", ECOMPRequestID);
        return createCorrespondingStatus();
    }

    @RequestMapping(value = "/commitInfo", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public GitRepositoryState getCommitInfo() throws IOException {
        Properties properties = new Properties();
        properties.load(getClass().getClassLoader().getResourceAsStream(GIT_PROPERTIES_FILENAME));
        return new GitRepositoryState(properties);
    }

    private HealthStatus createCorrespondingStatus() {
        logData();
        try {
            int count = fnAppDoaImpl.getProfileCount(getUrl(), getUsername(), getPassword());
            LOGGER.debug(EELFLoggerDelegate.debugLogger, "count:::", count);
            return okStatus();
        } catch (Exception ex) {
            String errorMsg = ex.getMessage();
            LOGGER.error(EELFLoggerDelegate.errorLogger, errorMsg);
            return errorStatus(errorMsg);
        }
    }

    private void logData() {
        LOGGER.debug(EELFLoggerDelegate.debugLogger, "Performing health check");
        LOGGER.debug(EELFLoggerDelegate.debugLogger, "URL::", getUrl());
        LOGGER.debug(EELFLoggerDelegate.debugLogger, "username::", getUsername());
    }

    private HealthStatus okStatus() {
        return new HealthStatus(OK, dateFormat.format(new Date()), "health check succeeded");
    }

    private HealthStatus errorStatus(String msg) {
        return new HealthStatus(INTERNAL_SERVER_ERROR, dateFormat.format(
                new Date()), "health check failed: " + msg);
    }

    private String getUrl() {
        return SystemProperties.getProperty("db.connectionURL");
    }

    private String getUsername() {
        return SystemProperties.getProperty("db.userName");
    }

    private String getPassword() {
        return SystemProperties.getProperty("db.password");
    }
}