from datetime import datetime
from blog import db, login_manager
from werkzeug.security import generate_password_hash, check_password_hash
from flask_login import UserMixin

class Post(db.Model):
  id = db.Column(db.Integer, primary_key=True)
  date = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
  title = db.Column(db.Text, nullable=False)
  content = db.Column(db.Text, nullable=False)
  image_file = db.Column(db.String(40), nullable=False, default='default.jpg')
  author_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)

  def __repr__(self):
    return f"Post('{self.date}', '{self.title}', '{self.content}')"

class User(UserMixin,db.Model):
  id=db.Column(db.Integer,primary_key=True)
  username=db.Column(db.String(15),unique=True,nullable=False)
  email=db.Column(db.String(120),unique=True,nullable=False)
  password_hash=db.Column(db.String(128))
  password=db.Column(db.String(60),nullable=False)
  post=db.relationship('Post',backref='user',lazy=True)
  comment=db.relationship('Comment',backref='user',lazy=True)
  is_admin=db.Column(db.Boolean,nullable=False,default=False)

  def __repr__(self):
    return f"User('{self.username}','{self.email}')"

  @property
  def password(self):
    raise AttributeError('password is not a readable attribute')

  @password.setter
  def password(self,password):
    self.password_hash=generate_password_hash(password)

  def verify_password(self,password):
    return check_password_hash(self.password_hash,password)

@login_manager.user_loader
def load_user(user_id):
  return User.query.get(int(user_id))

class Comment(db.Model):
  id = db.Column(db.Integer,primary_key=True)
  date = db.Column(db.DateTime,nullable=False,default=datetime.utcnow)
  content = db.Column(db.Text,nullable=False)
  parent_id = db.Column(db.Integer,db.ForeignKey('comment.id'),nullable=True)
  post_id = db.Column(db.Integer,db.ForeignKey('post.id'),nullable=False)
  author_id = db.Column(db.Integer,db.ForeignKey('user.id'),nullable=False)
  parent = db.relationship('Comment',backref='comment_parent',remote_side=id,lazy=True)

  def __repr__(self):
    return f"Post('{self.date}','{self.content}')"


class Rate(db.Model):
  # id = db.Column(db.Integer,primary_key=True)
  date = db.Column(db.DateTime,nullable=False,default=datetime.utcnow)
  rateValue = db.Column(db.Integer,nullable=False)
  post_id = db.Column(db.Integer,db.ForeignKey('post.id'),nullable=False, primary_key=True)
  author_id = db.Column(db.Integer,db.ForeignKey('user.id'),nullable=False, primary_key=True)

  def __repr__(self):
    return f"Post('{self.date}','{self.value}')"