/**
    * Copyright 2011 The Kuali Foundation Licensed under the
    * Educational Community 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.osedu.org/licenses/ECL-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 org.kuali.mobility.shared.controllers;
  
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.List;
  import java.sql.Timestamp;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.kuali.mobility.file.entity.File;
  import org.kuali.mobility.file.service.FileService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Controller;
  import org.springframework.ui.Model;
  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.ResponseBody;
  import org.springframework.web.multipart.MultipartFile;
  import org.springframework.web.multipart.MultipartHttpServletRequest;
  
  @Controller 
  @RequestMapping("/files")
  public class FileController {
  
  	private static org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(FileController.class);
  
      @Autowired
      private FileService fileService;
  
      @RequestMapping(value = "/get/{id}", method = RequestMethod.GET)
      public void getFile(@PathVariable("id") Long id, HttpServletRequest request, HttpServletResponse response) {
      	    	
      	File file = fileService.findFileById(id);
      	LOG.info("--- Retrieve File ---");
      	LOG.info(file);
  
      	response.setContentType(file.getContentType());
      	response.setContentLength(file.getBytes().length);
      	try {
  			OutputStream out = response.getOutputStream();
  			out.write(file.getBytes());
      	} catch (IOException e) {
  			e.printStackTrace();
  		}
      	
      	
      }
  
      @RequestMapping(method = RequestMethod.GET)
      public String index(HttpServletRequest request, Model uiModel) {
      	List<File> files = fileService.findAllFiles();
      	uiModel.addAttribute("files", files);
      	uiModel.addAttribute("fileCount", files.size());
  
      	return "files";
      }
      
  	@SuppressWarnings("unchecked")
  	@RequestMapping(value = "/remove/{fileHash}", method = RequestMethod.GET)
  	public String removeFile(Model uiModel, HttpServletRequest request, @PathVariable("fileHash") Long fileHash) {
  		File fileToDelete = fileService.findFileById(fileHash);
  		if(fileToDelete != null){
  			LOG.info("Will delete file with Id: " + fileToDelete.getId());
  			if(fileService.removeFile(fileToDelete)){
  				LOG.info("Did delete file.");
  			}
  		}
  		
      	return "files";		
  	}	    
      
      @RequestMapping(value = "/save", method = RequestMethod.POST)
      @ResponseBody
      public String handleFormUpload(MultipartHttpServletRequest request) {
      	    	
      	MultipartFile mfile = request.getFile("file");
      	// This constructor populates the fields in the File object. 
      	File file = new File(mfile);
  		file.setPostedTimestamp(new Timestamp(System.currentTimeMillis()));
      	Long fileId = fileService.saveFile(file);
  
      	LOG.info("--- Saving File ---");
     	LOG.info(file);
     	
    		return "{\"name\":\"" + file.getFileName() + "\",\"fileid\":\"" + file.getId() + "\",\"size\":\"" + file.getBytes().length + "\"}";
     }
 }