from datetime import datetime
from werkzeug.security import generate_password_hash,check_password_hash
from app import db, login
from flask_login import UserMixin

#Table for the User.
"""
Database Classes for both User table and Posts table
pk-->primary Key
fk-->Foreign Key 
Classes
 User():
    Columns: (userId(pk), username, email, password, postsId(fk))
Posts():
    Columns: (postId(pk), body, timestamp, userId(fk)) 
  
  Function to call on this database

"""

class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(64), index=True, unique=True)
    email = db.Column(db.String(120), index=True, unique=True)
    password_hash = db.Column(db.String(128))
    posts = db.relationship('Post', backref='author', lazy='dynamic')

    def __repr__(self):
        return '<User {}>'.format(self.username)
    
    def set_password(self, password):
        self.password_hash = generate_password_hash(password)
    
    def check_password(self, password):
        return check_password_hash(self.password_hash, password)

@login.user_loader
def load_user(id):
    return User.query.get(int(id))

#Table for the Post
"""
    
"""

class Post(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    body = db.Column(db.String(140))
    timestamp = db.Column(db.DateTime, index=True, default=datetime.utcnow)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))

    def __repr__(self):
        return '<Post {}>'.format(self.username)
