from datetime import datetime
from uuid import uuid4

from flask_login import UserMixin, AnonymousUserMixin
from sqlalchemy import func
from sqlalchemy.ext.hybrid import hybrid_property
from werkzeug.security import generate_password_hash, check_password_hash

from app import db
from app.models.utils import ModelMixin
from app.logger import log
from app import schema as s


def gen_password_reset_id() -> str:
    return str(uuid4())


class User(db.Model, UserMixin, ModelMixin):

    __tablename__ = "users"

    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(60), unique=True, nullable=False)
    email = db.Column(db.String(255), unique=True, nullable=False)
    password_hash = db.Column(db.String(255), default="")
    activated = db.Column(db.Boolean, default=False)
    created_at = db.Column(db.DateTime, default=datetime.now)
    unique_id = db.Column(db.String(36), default=gen_password_reset_id)
    reset_password_uid = db.Column(db.String(64), default=gen_password_reset_id)

    @hybrid_property
    def password(self):
        return self.password_hash

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

    @classmethod
    def authenticate(cls, user_id, password):
        user = cls.query.filter(
            db.or_(
                func.lower(cls.username) == func.lower(user_id),
                func.lower(cls.email) == func.lower(user_id),
            )
        ).first()
        if not user:
            log(log.WARNING, "user:[%s] not found", user_id)

        if user is not None and check_password_hash(user.password, password):
            return user

    def reset_password(self):
        self.password_hash = ""
        self.reset_password_uid = gen_password_reset_id()
        self.save()

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

    @property
    def json(self):
        u = s.User.from_orm(self)
        return u.json()


class AnonymousUser(AnonymousUserMixin):
    pass