from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_login import UserMixin
from flask_bcrypt import generate_password_hash, check_password_hash
from flask_migrate import Migrate

db = SQLAlchemy()
migrate = Migrate()


def init_app(app):
    db.init_app(app)
    migrate.init_app(app, db)


class User(UserMixin, db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(128), unique=True, nullable=False)
    password = db.Column(db.String(128), nullable=False)
    created_on = db.Column(db.DateTime, index=False,
                           unique=False, nullable=True)
    last_login = db.Column(db.DateTime, index=False,
                           unique=False, nullable=True)

    def set_password(self, password):
        self.password = generate_password_hash(password)

    def check_password(self, password):
        return check_password_hash(self.password, password)

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