package com.tandaly.actions;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Random;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.alibaba.fastjson.JSON;

/**
 * kindeditor文件上传控制器
 * @author Tandaly
 * @date 2013-7-17 下午1:38:19
 */
@Controller
@RequestMapping("kindeditor")
public class KindEditorController {

	/**
	 * 文件上传
	 * @param request
	 * @param response
	 * @return
	 * @throws ServletException
	 * @throws IOException
	 * @throws FileUploadException
	 */
	@SuppressWarnings("rawtypes")
	@RequestMapping(value = "file_upload.do")
	//@ResponseBody
	public void fileUpload(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException,
			FileUploadException {
		ServletContext application = request.getSession().getServletContext();
		String savePath = application.getRealPath("/") + "attached/";

		// 文件保存目录URL
		String saveUrl = request.getContextPath() + "/attached/";

		// 定义允许上传的文件扩展名
		HashMap<String, String> extMap = new HashMap<String, String>();
		extMap.put("image", "gif,jpg,jpeg,png,bmp");
		extMap.put("flash", "swf,flv");
		extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
		extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,xml,sql,txt,zip,rar,gz,bz2,pdf");

		// 最大文件大小
		long maxSize = 10000000;

		response.setContentType("text/html; charset=UTF-8");

		if (!ServletFileUpload.isMultipartContent(request)) {
			writeMsg(response, "请选择文件。");
			return;
		}
		// 检查目录
		File uploadDir = new File(savePath);
		if (!uploadDir.isDirectory()) {
			writeMsg(response, "上传目录不存在。");
			return;
		}
		// 检查目录写权限
		if (!uploadDir.canWrite()) {
			writeMsg(response, "上传目录没有写权限。");
			return;
		}

		String dirName = request.getParameter("dir");
		if (dirName == null) {
			dirName = "image";
		}
		if (!extMap.containsKey(dirName)) {
			writeMsg(response, "目录名不正确。");
			return;
		}
		// 创建文件夹
		savePath += dirName + "/";
		saveUrl += dirName + "/";
		File saveDirFile = new File(savePath);
		if (!saveDirFile.exists()) {
			saveDirFile.mkdirs();
		}
		SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
		String ymd = sdf.format(new Date());
		savePath += ymd + "/";
		saveUrl += ymd + "/";
		File dirFile = new File(savePath);
		if (!dirFile.exists()) {
			dirFile.mkdirs();
		}

		FileItemFactory factory = new DiskFileItemFactory();
		ServletFileUpload upload = new ServletFileUpload(factory);
		upload.setHeaderEncoding("UTF-8");
		List items = upload.parseRequest(request);
		Iterator itr = items.iterator();
		while (itr.hasNext()) {
			FileItem item = (FileItem) itr.next();
			String fileName = item.getName();
			if (!item.isFormField()) {
				// 检查文件大小
				if (item.getSize() > maxSize) {
					writeMsg(response, "上传文件大小超过限制。");
					return;
				}
				// 检查扩展名
				String fileExt = fileName.substring(
						fileName.lastIndexOf(".") + 1).toLowerCase();
				if (!Arrays.<String> asList(extMap.get(dirName).split(","))
						.contains(fileExt)) {
					writeMsg(response, "上传文件扩展名是不允许的扩展名。\n只允许"
							+ extMap.get(dirName) + "格式。");
					return;
				}

				SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
				String newFileName = df.format(new Date()) + "_"
						+ new Random().nextInt(1000) + "." + fileExt;
				try {
					File uploadedFile = new File(savePath, newFileName);
					item.write(uploadedFile);
				} catch (Exception e) {
					writeMsg(response, "上传文件失败。");
					return;
				}

				Map<String, Object> msg = new HashMap<String, Object>();
				msg.put("error", 0);
				msg.put("url", saveUrl + newFileName);
				//WebUtil.writerJson(response, msg);
				writeJson(response, msg);
			}
		}
	}

	/**
	 * 输出信息
	 * @param response
	 * @param message
	 */
	private void writeMsg(HttpServletResponse response, String message)
	{
		Map<String, Object> msg = new HashMap<String, Object>();
		msg.put("error", 1);
		msg.put("message", message);
		
		//WebUtil.writerJson(response, msg);
		writeJson(response, msg);
		
	}
	
	/**
	 *输出json
	 * @param response
	 * @param msg
	 */
	private void writeJson(HttpServletResponse response, Object msg)
	{
		/************以下是解决避免ie下载文件 start*************/
		response.reset();
        response.setCharacterEncoding("UTF-8");
        response.setContentType("text/html");
        PrintWriter writer = null;
        try {
            writer = response.getWriter();
            
			writer.println(JSON.toJSONString(msg));
            
            writer.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        /************以下是解决避免ie下载文件 end*************/
	}

	/**
	 * 文件管理
	 * @param request
	 * @param response
	 * @throws ServletException
	 * @throws IOException
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	@RequestMapping(value = "file_manager_json.do")
	public void fileManager(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		ServletContext application = request.getSession().getServletContext();
		ServletOutputStream out = response.getOutputStream();
		// 根目录路径，可以指定绝对路径，比如 /var/www/attached/
		String rootPath = application.getRealPath("/") + "attached/";
		// 根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
		String rootUrl = request.getContextPath() + "/attached/";
		// 图片扩展名
		String[] fileTypes = new String[] { "gif", "jpg", "jpeg", "png", "bmp" };

		String dirName = request.getParameter("dir");
		if (dirName != null) {
			if (!Arrays.<String> asList(
					new String[] { "image", "flash", "media", "file" })
					.contains(dirName)) {
				out.println("Invalid Directory name.");
				return;
			}
			rootPath += dirName + "/";
			rootUrl += dirName + "/";
			File saveDirFile = new File(rootPath);
			if (!saveDirFile.exists()) {
				saveDirFile.mkdirs();
			}
		}
		// 根据path参数，设置各路径和URL
		String path = request.getParameter("path") != null ? request
				.getParameter("path") : "";
		String currentPath = rootPath + path;
		String currentUrl = rootUrl + path;
		String currentDirPath = path;
		String moveupDirPath = "";
		if (!"".equals(path)) {
			String str = currentDirPath.substring(0,
					currentDirPath.length() - 1);
			moveupDirPath = str.lastIndexOf("/") >= 0 ? str.substring(0,
					str.lastIndexOf("/") + 1) : "";
		}

		// 排序形式，name or size or type
		String order = request.getParameter("order") != null ? request
				.getParameter("order").toLowerCase() : "name";

		// 不允许使用..移动到上一级目录
		if (path.indexOf("..") >= 0) {
			out.println("Access is not allowed.");
			return;
		}
		// 最后一个字符不是/
		if (!"".equals(path) && !path.endsWith("/")) {
			out.println("Parameter is not valid.");
			return;
		}
		// 目录不存在或不是目录
		File currentPathFile = new File(currentPath);
		if (!currentPathFile.isDirectory()) {
			out.println("Directory does not exist.");
			return;
		}
		// 遍历目录取的文件信息
		List<Hashtable> fileList = new ArrayList<Hashtable>();
		if (currentPathFile.listFiles() != null) {
			for (File file : currentPathFile.listFiles()) {
				Hashtable<String, Object> hash = new Hashtable<String, Object>();
				String fileName = file.getName();
				if (file.isDirectory()) {
					hash.put("is_dir", true);
					hash.put("has_file", (file.listFiles() != null));
					hash.put("filesize", 0L);
					hash.put("is_photo", false);
					hash.put("filetype", "");
				} else if (file.isFile()) {
					String fileExt = fileName.substring(
							fileName.lastIndexOf(".") + 1).toLowerCase();
					hash.put("is_dir", false);
					hash.put("has_file", false);
					hash.put("filesize", file.length());
					hash.put("is_photo", Arrays.<String> asList(fileTypes)
							.contains(fileExt));
					hash.put("filetype", fileExt);
				}
				hash.put("filename", fileName);
				hash.put("datetime",
						new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file
								.lastModified()));
				fileList.add(hash);
			}
		}

		if ("size".equals(order)) {
			Collections.sort(fileList, new SizeComparator());
		} else if ("type".equals(order)) {
			Collections.sort(fileList, new TypeComparator());
		} else {
			Collections.sort(fileList, new NameComparator());
		}
		Map<String, Object> msg = new HashMap<String, Object>();
		msg.put("moveup_dir_path", moveupDirPath);
		msg.put("current_dir_path", currentDirPath);
		msg.put("current_url", currentUrl);
		msg.put("total_count", fileList.size());
		msg.put("file_list", fileList);
		response.setContentType("application/json; charset=UTF-8");
		String msgStr = "";
			
		msgStr = JSON.toJSONString(msg);
		
		out.println(msgStr);
	}

	@SuppressWarnings("rawtypes")
	class NameComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filename"))
						.compareTo((String) hashB.get("filename"));
			}
		}
	}

	@SuppressWarnings("rawtypes")
	class SizeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				if (((Long) hashA.get("filesize")) > ((Long) hashB
						.get("filesize"))) {
					return 1;
				} else if (((Long) hashA.get("filesize")) < ((Long) hashB
						.get("filesize"))) {
					return -1;
				} else {
					return 0;
				}
			}
		}
	}

	@SuppressWarnings("rawtypes")
	class TypeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable) a;
			Hashtable hashB = (Hashtable) b;
			if (((Boolean) hashA.get("is_dir"))
					&& !((Boolean) hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean) hashA.get("is_dir"))
					&& ((Boolean) hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String) hashA.get("filetype"))
						.compareTo((String) hashB.get("filetype"));
			}
		}
	}

}