package wordServlet;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
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 word.FileRead;
import word.Word;

/**
 * Servlet implementation class wordServlet
 */
public class WordServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public WordServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.getWriter().append("Served at: ").append(request.getContextPath());
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */

	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		
		String url = request.getParameter("inurl");
		FileRead read = new FileRead();
		String text = read.fileRead(url);
		
		Word word = new Word();

		int charCount = word.getCharCount(text);	//统计字符数
		request.setAttribute("charCount", charCount);
		
		int lineCount = word.getLineCount(text);	//统计有效行数
		request.setAttribute("lineCount", lineCount);
		
		text = word.getWord(text);
		
		int wordCount = word.getWordCount(text);	//统计单词总数
		request.setAttribute("wordCount", wordCount);
		
		int number = Integer.parseInt(request.getParameter("number"));		//输出单词数量
		Map<String, Integer> wordMap = new HashMap<>();
		wordMap = word.getWordFrequency(text);	
		List<Map.Entry<String, Integer>> arrayList = new ArrayList<Map.Entry<String, Integer>>();
		arrayList = word.sort(wordMap);
		List<Map.Entry<String, Integer>> wordList = new ArrayList<Map.Entry<String, Integer>>();
		if(number <= arrayList.size()) {
			wordList = arrayList.subList(0, number);
		}else {
			wordList = arrayList.subList(0, arrayList.size());
		}		
		request.setAttribute("wordList", wordList);
		
		int length = Integer.parseInt(request.getParameter("length"));	//输出词组词频
		Map<String, Integer> phraseMap = new HashMap<>();
		phraseMap = word.getPhraseFrequency(text, length);		
		List<Map.Entry<String, Integer>> phraseList = new ArrayList<Map.Entry<String, Integer>>();
		phraseList = word.sort(phraseMap);
		request.setAttribute("phraseList", phraseList);
		
		request.getRequestDispatcher("/result.jsp").forward(request, response);
	}
}