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/*
 * Licensed to Laurent Broudoux (the "Author") under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Author licenses this
 * file to you 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.github.microcks.web;

import io.github.microcks.domain.ImportJob;
import io.github.microcks.repository.ImportJobRepository;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * @author laurent
 */
@org.springframework.web.bind.annotation.RestController
@RequestMapping("/api")
public class HealthController {

   /** A simple logger for diagnostic messages. */
   private static Logger log = LoggerFactory.getLogger(HealthController.class);

   @Autowired
   private ImportJobRepository jobRepository;

   @RequestMapping(value = "/health", method = RequestMethod.GET)
   public ResponseEntity health() {
      log.trace("Health check endpoint invoked");

      try {
         // Using a single selection query to ensure connection to MongoDB is ok.
         List jobs = jobRepository.findAll(PageRequest.of(0, 10, Sort.by(Sort.Direction.ASC, "name")))
               .getContent();
      } catch (Exception e) {
         log.error("Health check caught an exception: " + e.getMessage(), e);
         return new ResponseEntity(HttpStatus.SERVICE_UNAVAILABLE);
      }
      log.trace("Health check is OK");
      return new ResponseEntity(HttpStatus.OK);
   }
}