from flask import session
from datetime import datetime
from main import db


class Credit(db.Model):
    __tablename__ = 'credit'
    creditid = db.Column(db.Integer, primary_key=True, autoincrement=True)
    userid = db.Column(db.Integer, db.ForeignKey('user.userid'))
    category = db.Column(db.String(255), nullable=False)
    target = db.Column(db.String(255), nullable=False)
    credit = db.Column(db.Integer, nullable=False)
    createtime = db.Column(db.DateTime, default=datetime.utcnow)
    updatetime = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    # user = db.relationship('Users', backref=db.backref('credit_user_userid', lazy=True))

    # 插入积分明细
    @classmethod
    def insert_detail(cls,category,target,credit):
        '''

        :param category: 积分变化的原因 枚举变量 1评论comment 2注册enroll 3登录login 4投稿submission  5文章阅读read
        :param target:积分消耗的目标，文章id或者登录时候的用户0
        :param credit:消耗的积分
        :return:
        '''
        credit = Credit(userid = session.get('userid'),category=category,target=target,credit=credit,createtime=datetime.utcnow(),updatetime=datetime.utcnow())
        # cls.add(credit)
        db.session.add(credit)
        # cls.commit() 不可以
        db.session.commit()

    # 判断用户是否已经消耗积分
    @classmethod
    def check_payed_article(cls,articleid):
        '''
        如果消耗了积分，返回True
        如果没有消耗积分，返回False
        :param articleid:
        :return:
        '''
        result = cls.query.filter_by(userid = session.get('userid'),target=articleid).first()
        i = 0
        while i < 10:
            i += 1
            print("userid=",session.get('userid'),"articleid=",articleid)
        # 如果看过，返回TRUE
        if result is None: # 如果没有观看记录
            return False
        else: # 如果有观看记录
            return True