package com.example.controller;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.example.pojo.User;
import com.example.service.UserServiceImpl;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URLDecoder;
@WebServlet(name = "Login", value = "/Login")
public class Login extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
    }
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //設(shè)置字符編碼，防止中文亂碼
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("UTF-8");
        //以json數(shù)據(jù)完成操作
        response.setContentType("application/json;charset=UTF-8");
        System.out.println(request.getContentType());// 得到客戶(hù)端發(fā)送過(guò)來(lái)內(nèi)容的類(lèi)型，application/json;charset=UTF-8
        System.out.println(request.getRemoteAddr());// 得到客戶(hù)端的ip地址，
        BufferedReader br = new BufferedReader(new InputStreamReader(// 使用字符流讀取客戶(hù)端發(fā)過(guò)來(lái)的數(shù)據(jù)
                request.getInputStream()));
        String line = null;
        StringBuffer s = new StringBuffer();//StringBuffer String的區(qū)別，如果要對(duì)數(shù)據(jù)作頻繁的修改，則用StringBuffer
        // 以一行的形式讀取數(shù)據(jù)
        while ((line = br.readLine()) != null) {
            s.append(line);
        }
        // 關(guān)閉io流
        br.close();
        System.out.println(s.toString());
        //JSON：這是json解析包，IDEA是沒(méi)有，要我們自己導(dǎo)入
        User user = JSON.parseObject(s.toString(), User.class);//是用了反射機(jī)制來(lái)完成對(duì)象的封閉
        //以u(píng)tf-8解碼操作
        String number = URLDecoder.decode(user.getNumber(), "utf-8");
        String password = URLDecoder.decode(user.getPassword(), "utf-8");
        System.out.println("微信號(hào):" + number + ", 密碼;" + password);
        System.out.println(user);
        // 去數(shù)據(jù)庫(kù)完成用戶(hù)登錄功能
        UserServiceImpl us = new UserServiceImpl();
        //調(diào)用登錄的方法
        User user1 = us.login(number, password);
        boolean loginInfo = false;
        if (user1 != null) {
            //登錄成功
            loginInfo = true;
        }
        //將結(jié)果返回給客戶(hù)端，將結(jié)果構(gòu)建成json數(shù)據(jù)返回給客戶(hù)端
        JSONObject rjson = new JSONObject();
        rjson.put("json", loginInfo);
        response.getOutputStream().write(
                rjson.toString().getBytes("UTF-8"));// 向客戶(hù)端發(fā)送一個(gè)帶有json對(duì)象內(nèi)容的響應(yīng)
    }
}

    //用戶(hù)登錄
    User login(String number,String password);

    @Override
    public User login(String number, String password) {
        //調(diào)用dao層完成數(shù)據(jù)查詢(xún)操作
        User user = ud.findByUsername(number);
        if (user != null) {
            //比較密碼
            if (password.equals(user.getPassword())) {
                //登錄成功
                return user;
            }
        }
        return null;
    }

    //查詢(xún)用戶(hù)通過(guò)微信號(hào)
    User findByUsername(String number);

    @Override
    public User findByUsername(String number) {
        //判斷數(shù)據(jù)是用戶(hù)名還是手機(jī)
        Pattern pattern = Pattern
                .compile("^(13[0-9]|15[0-9]|153|15[6-9]|180|18[23]|18[5-9])\\d{8}$");
        Matcher matcher = pattern.matcher(number);
        //手機(jī)sql執(zhí)行語(yǔ)句
        if (matcher.matches()) {
            //sql
            String sql = "select * from user where phone=?";
            rs = JDBCUtil.executeQuery(sql, number);
        } else {  //用戶(hù)名sql執(zhí)行語(yǔ)句
            //sql
            String sql = "select * from user where number=?";
            rs = JDBCUtil.executeQuery(sql, number);
        }
        //判斷是否查詢(xún)到用戶(hù)
        try {
            if (rs.next()) {
                //如果查詢(xún)到用戶(hù)，將用戶(hù)封裝到User對(duì)象中
                int id = rs.getInt("id");
                String number1 = rs.getString("number");
                String name = rs.getString("name");
                String password = rs.getString("password");
                String phone = rs.getString("phone");
                String remark = rs.getString("remark");
                //將查詢(xún)到的用戶(hù)封裝到一個(gè)User對(duì)象中
                User user = new User();
                user.setId(id);
                user.setNumber(number1);
                user.setName(name);
                user.setPassword(password);
                user.setPhone(phone);
                user.setRemark(remark);
                System.out.println("查詢(xún)到的用戶(hù)" + user);
                return user;
            }
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return null;
    }