# -*- coding: future_fstrings -*-
# mautrix-telegram - A Matrix-Telegram puppeting bridge
# Copyright (C) 2018 Tulir Asokan
#
# 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 sqlalchemy import (Column, UniqueConstraint, ForeignKey, ForeignKeyConstraint, Integer,
                        BigInteger, String, Boolean, Text)
from sqlalchemy.sql import expression
from sqlalchemy.orm import relationship, Query
from typing import Dict, Optional, List
import json

from mautrix_telegram.types import MatrixUserID, MatrixRoomID, MatrixEventID
from .types import TelegramID
from .base import Base


class Portal(Base):
    query = None  # type: Query
    __tablename__ = "portal"

    # Telegram chat information
    tgid = Column(Integer, primary_key=True)  # type: TelegramID
    tg_receiver = Column(Integer, primary_key=True)  # type: TelegramID
    peer_type = Column(String, nullable=False)
    megagroup = Column(Boolean)

    # Matrix portal information
    mxid = Column(String, unique=True, nullable=True)  # type: Optional[MatrixRoomID]

    config = Column(Text, nullable=True)

    # Telegram chat metadata
    username = Column(String, nullable=True)
    title = Column(String, nullable=True)
    about = Column(String, nullable=True)
    photo_id = Column(String, nullable=True)


class Message(Base):
    query = None  # type: Query
    __tablename__ = "message"

    mxid = Column(String)  # type: MatrixEventID
    mx_room = Column(String)  # type: MatrixRoomID
    tgid = Column(Integer, primary_key=True)  # type: TelegramID
    tg_space = Column(Integer, primary_key=True)  # type: TelegramID

    __table_args__ = (UniqueConstraint("mxid", "mx_room", "tg_space", name="_mx_id_room"),)


class UserPortal(Base):
    query = None  # type: Query
    __tablename__ = "user_portal"

    user = Column(Integer, ForeignKey("user.tgid", onupdate="CASCADE", ondelete="CASCADE"),
                  primary_key=True)  # type: TelegramID
    portal = Column(Integer, primary_key=True)  # type: TelegramID
    portal_receiver = Column(Integer, primary_key=True)  # type: TelegramID

    __table_args__ = (ForeignKeyConstraint(("portal", "portal_receiver"),
                                           ("portal.tgid", "portal.tg_receiver"),
                                           onupdate="CASCADE", ondelete="CASCADE"),)


class User(Base):
    query = None  # type: Query
    __tablename__ = "user"

    mxid = Column(String, primary_key=True)  # type: MatrixUserID
    tgid = Column(Integer, nullable=True, unique=True)  # type: Optional[TelegramID]
    tg_username = Column(String, nullable=True)
    tg_phone = Column(String, nullable=True)
    saved_contacts = Column(Integer, default=0, nullable=False)
    contacts = relationship("Contact", uselist=True,
                            cascade="save-update, merge, delete, delete-orphan"
                            )  # type: List[Contact]
    portals = relationship("Portal", secondary="user_portal")


class RoomState(Base):
    query = None  # type: Query
    __tablename__ = "mx_room_state"

    room_id = Column(String, primary_key=True)  # type: MatrixRoomID
    _power_levels_text = Column("power_levels", Text, nullable=True)
    _power_levels_json = {}  # type: Dict

    @property
    def has_power_levels(self) -> bool:
        return bool(self._power_levels_text)

    @property
    def power_levels(self) -> Dict:
        if not self._power_levels_json and self._power_levels_text:
            self._power_levels_json = json.loads(self._power_levels_text)
        return self._power_levels_json

    @power_levels.setter
    def power_levels(self, val: Dict) -> None:
        self._power_levels_json = val
        self._power_levels_text = json.dumps(val)


class UserProfile(Base):
    query = None  # type: Query
    __tablename__ = "mx_user_profile"

    room_id = Column(String, primary_key=True)  # type: MatrixRoomID
    user_id = Column(String, primary_key=True)  # type: MatrixUserID
    membership = Column(String, nullable=False, default="leave")
    displayname = Column(String, nullable=True)
    avatar_url = Column(String, nullable=True)

    def dict(self) -> Dict[str, str]:
        return {
            "membership": self.membership,
            "displayname": self.displayname,
            "avatar_url": self.avatar_url,
        }


class Contact(Base):
    query = None  # type: Query
    __tablename__ = "contact"

    user = Column(Integer, ForeignKey("user.tgid"), primary_key=True)  # type: TelegramID
    contact = Column(Integer, ForeignKey("puppet.id"), primary_key=True)  # type: TelegramID


class Puppet(Base):
    query = None  # type: Query
    __tablename__ = "puppet"

    id = Column(Integer, primary_key=True)  # type: TelegramID
    custom_mxid = Column(String, nullable=True)  # type: Optional[MatrixUserID]
    access_token = Column(String, nullable=True)
    displayname = Column(String, nullable=True)
    displayname_source = Column(Integer, nullable=True)  # type: Optional[TelegramID]
    username = Column(String, nullable=True)
    photo_id = Column(String, nullable=True)
    is_bot = Column(Boolean, nullable=True)
    matrix_registered = Column(Boolean, nullable=False, server_default=expression.false())


# Fucking Telegram not telling bots what chats they are in 3:<
class BotChat(Base):
    query = None  # type: Query
    __tablename__ = "bot_chat"
    id = Column(Integer, primary_key=True)  # type: TelegramID
    type = Column(String, nullable=False)


class TelegramFile(Base):
    query = None  # type: Query
    __tablename__ = "telegram_file"

    id = Column(String, primary_key=True)
    mxc = Column(String)
    mime_type = Column(String)
    was_converted = Column(Boolean)
    timestamp = Column(BigInteger)
    size = Column(Integer, nullable=True)
    width = Column(Integer, nullable=True)
    height = Column(Integer, nullable=True)
    thumbnail_id = Column("thumbnail", String, ForeignKey("telegram_file.id"), nullable=True)
    thumbnail = relationship("TelegramFile", uselist=False)


def init(db_session) -> None:
    Portal.query = db_session.query_property()
    Message.query = db_session.query_property()
    UserPortal.query = db_session.query_property()
    User.query = db_session.query_property()
    Puppet.query = db_session.query_property()
    BotChat.query = db_session.query_property()
    TelegramFile.query = db_session.query_property()
    UserProfile.query = db_session.query_property()
    RoomState.query = db_session.query_property()