# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
from typing import List, NamedTuple

from sqlalchemy import Column, ForeignKey, ForeignKeyConstraint, String, Text, or_
from sqlalchemy.engine.base import Engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker, Session, relationship

from mautrix.types import UserID

AuthInfo = NamedTuple('AuthInfo', server=str, api_token=str)
AliasInfo = NamedTuple('AliasInfo', server=str, alias=str)
Base = declarative_base()

from pprint import pprint


class GCMToken(Base):
    __tablename__ = "gcmtoken"

    user_id: UserID = Column(String(255), primary_key=True, nullable=False)
    api_token = Column(Text, nullable=False)


class Database:
    db: Engine

    def __init__(self, db: Engine) -> None:
        self.db = db
        Base.metadata.create_all(db)
        self.Session = sessionmaker(bind=self.db)

    def add_gcm(self, mxid: UserID, token: str) -> None:
        s = self.Session()
        s.add(GCMToken(user_id=mxid, api_token=token))
        s.commit()

    def rm_gcm(self, mxid: UserID) -> None:
        s = self.Session()
        token = s.query(GCMToken).get((mxid))
        s.delete(token)
        s.commit()

    def has_gcm(self, user_id: UserID) -> bool:
        s: Session = self.Session()
        return s.query(GCMToken).filter(GCMToken.user_id == user_id).count() > 0

    def get_gcm(self, user_id: UserID) -> str:
        s = self.Session()
        row = s.query(GCMToken).filter(GCMToken.user_id == user_id).scalar()
        if row:
            return row.api_token
        return None