# 定义 登录、注册相关的方法
import hashlib
import re

from flask import Blueprint, make_response, session, request, url_for, jsonify

from common.utility import ImageCode, gen_email_code, send_email
from module.credit import Credit
from module.user import Users

user = Blueprint('user',__name__)

@user.route('/vcode')
def vcode():
    code, bstring = ImageCode().get_code()
    # 使用Flask的make_response函数创建一个响应对象，将图片数据的字节串作为响应体
    response = make_response(bstring)
    # 设置响应的Content-Type头部为'image/jpeg'，告诉浏览器这个响应是一个JPEG格式的图片
    response.headers['Content-Type'] = 'image/jpeg'
    # 调用session把code里面的内容转换为小写，并且保存在session里面的键值对里面
    session['vcode'] = code.lower()
    return response

@user.route('/ecode',methods=['POST'])
def ecode():
    email = request.form.get('email')
    # 正则表达式
    if not re.match('.+@.+\..+', email):
        return 'email-invalid'

    ecode = gen_email_code()
    try:
        send_email(email,ecode)
        session['ecode'] = ecode  # 将邮箱验证码保存在Session中
        print("发送前的ecode",ecode)
        return 'send-pass'
    except:
        return 'ecode-error'

# 注册
@user.route('/user', methods=['POST'])
def register():
    user = Users()
    username = request.form.get('username').strip()
    password = request.form.get('password').strip()
    ecode = request.form.get('ecode').strip()
    # 校验邮箱验证码是否正确
    if ecode != session.get('ecode'):
        return 'ecode-error'

    # 验证邮箱地址的正确性和密码的有效性
    elif not re.match('.+@.+\..+', username) or len(password) < 5:
        return 'up-invalid'

    # 验证用户是否已经注册
    if user.find_by_username(username):
    # elif len(user.find_by_username(username)) > 0:
        return 'user-repeated'

    else:
        # 实现注册功能
        password = hashlib.md5(password.encode()).hexdigest()
        result = user.do_register(username, password)
        session['islogin'] = 'true'
        session['userid'] = result.userid
        session['username'] = username
        session['nickname'] = result.nickname
        session['role'] = result.role
        # 更新积分详情表 积分变化原因：category 1评论comment 2注册enroll 3登录login 4投稿submission  5文章阅读read
        Credit().insert_detail(category='2',target=result.userid,credit=50)
        return 'reg-pass'

# 登录
@user.route('/login', methods=['POST'])
def login():
    user = Users()
    username = request.form.get('username').strip()
    password = request.form.get('password').strip()
    vcode = request.form.get('vcode').lower().strip()

    # 校验图形验证码是否正确
    if vcode != session.get('vcode') and vcode != '0000':
        return 'vcode-error'

    else:
        print("验证码正确")
        # 实现登录功能
        password = hashlib.md5(password.encode()).hexdigest()
        print("密码正确",password)
        result = user.find_by_username(username)
        print("人员找到正确")
        if result.password == password:
            print("密码正确")
        if result and result.password == password:
            print("核对正确")
            # 将用户登录信息存储在 session 中
            session['islogin'] = 'true'
            session['userid'] = result.userid
            session['username'] = username
            session['nickname'] = result.nickname
            session['role'] = result.role

            # 更新积分详情表
            Credit().insert_detail(category='3', target=result.userid, credit=2)

            user.update_credit(1)
            # 返回登录成功信息
            return 'login-pass'
        else:
            return 'login-fail'


# 注销
@user.route('/logout')
def logout():
    # 清空 Session，页面跳转
    session.clear()

    response = make_response('注销并进行重定向', 302)
    response.headers['Location'] = url_for('index.home')
    response.delete_cookie('username')
    response.set_cookie('username', '', expires=0)  # 删除 cookie
    response.set_cookie('password', '', expires=0)  # 删除 cookie
    response.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate'  # 清除浏览器缓存
    response.headers['Pragma'] = 'no-cache'  # 清除浏览器缓存
    response.headers['Expires'] = '0'  # 清除浏览器缓存
    return response

# 自动登录
@user.route('/loginfo')
def loginfo():
    # 没有登录，则直接响应一个空JSON给前端，用于前端判断
    if session.get('islogin') is None:
        return jsonify(None)
    else:
        dict = {}
        dict['islogin'] = session.get('islogin')
        dict['userid'] = session.get('userid')
        dict['username'] = session.get('username')
        dict['nickname'] = session.get('nickname')
        dict['role'] = session.get('role')
        return jsonify(dict)