/*-
 * ============LICENSE_START=======================================================
 * Ran Simulator Controller
 * ================================================================================
 * Copyright (C) 2020 Wipro Limited.
 * ================================================================================
 * 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.ransim.rest.api.controller;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.ArrayList;
import java.util.List;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

@Controller
@RequestMapping("/file")
@CrossOrigin(origins = "*")
@Configuration
@PropertySource(value = "classpath:dumpfileNames.properties")
public class FileController {

	static Logger log = Logger.getLogger(FileController.class.getName());

	private static final String fileBasePath = "/tmp/ransim-install/config/";

	@Value("${defaultFiles:}")
	List<String> fileList = new ArrayList<>();

	/**
	 * Method to upload dump file
	 * 
	 * @param file
	 * @return
	 */
	@PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
	public ResponseEntity<String> uploadToLocalFileSystem(@RequestParam("file") MultipartFile file) {
		String fileName = StringUtils.cleanPath(file.getOriginalFilename());
		Path path = Paths.get(fileBasePath + fileName);
		try {
			Files.copy(file.getInputStream(), path, StandardCopyOption.REPLACE_EXISTING);
			fileList.add(fileName);
			log.info("File downloaded in " + fileBasePath + fileName);
		} catch (IOException e) {
			log.error(e);
		}
		log.info("Copied in path : " + path);
		return ResponseEntity.ok("Uploaded successfully");
	}

	/**
	 * Method to retrieve list of available dump files
	 * 
	 * @return
	 */
	@GetMapping(value = "/dumpfiles", produces = MediaType.APPLICATION_JSON_VALUE)
	public ResponseEntity<List<String>> getFiles() {
		return ResponseEntity.ok(fileList);
	}

}