import time
from werkzeug.security import generate_password_hash, check_password_hash
from flask_sqlalchemy import SQLAlchemy
from authlib.integrations.sqla_oauth2 import (
    OAuth2ClientMixin,
    OAuth2AuthorizationCodeMixin,
    OAuth2TokenMixin,
)
from flask_login import UserMixin

db = SQLAlchemy()


class User(db.Model, UserMixin):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(40), unique=True)
    name = db.Column(db.String(100))
    email = db.Column(db.String(100), nullable=False, unique=True)
    password_hash = db.Column(db.String(100), nullable=False)
    clients = db.relationship('OAuth2Client')
    auth_codes = db.relationship('OAuth2AuthorizationCode')
    tokens = db.relationship('OAuth2Token')

    def __repr__(self):
        return "<{}:{}>".format(self.id, self.username)

    def get_user_id(self):
        return self.id

    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)


class OAuth2Client(db.Model, OAuth2ClientMixin):
    __tablename__ = 'oauth2_client'

    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(
        db.Integer, db.ForeignKey('user.id', ondelete='CASCADE'))
    user = db.relationship('User')


class OAuth2AuthorizationCode(db.Model, OAuth2AuthorizationCodeMixin):
    __tablename__ = 'oauth2_code'

    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(
        db.Integer, db.ForeignKey('user.id', ondelete='CASCADE'))
    user = db.relationship('User')


class OAuth2Token(db.Model, OAuth2TokenMixin):
    __tablename__ = 'oauth2_token'

    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(
        db.Integer, db.ForeignKey('user.id', ondelete='CASCADE'))
    user = db.relationship('User')

    def is_refresh_token_active(self):
        if self.revoked:
            return False
        expires_at = self.issued_at + self.expires_in * 2
        return expires_at >= time.time()