# matrix-appservice-kakaotalk - A Matrix-KakaoTalk puppeting bridge.
# Copyright (C) 2022 Tulir Asokan, Andrew Ferrazzutti
#
# 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/>.
"""Custom wrapper classes around types defined by the KakaoTalk API."""

from typing import Optional, NewType, Union

from attr import dataclass

from mautrix.types import (
    SerializableAttrs,
    JSON,
    deserializer,
    MessageType,
)

from ..types.api.struct import MoreSettingsStruct, LessSettingsStruct
from ..types.bson import Long
from ..types.channel.channel_info import NormalChannelInfo
from ..types.channel.channel_type import ChannelType
from ..types.chat import KnownChatType
from ..types.openlink.open_channel_info import OpenChannelInfo
from ..types.openlink.open_link_type import OpenChannelUserPerm
from ..types.user.channel_user_info import NormalChannelUserInfo, OpenChannelUserInfo


@dataclass
class SettingsStruct(SerializableAttrs):
    more: MoreSettingsStruct
    less: LessSettingsStruct


ChannelInfoUnion = NewType("ChannelInfoUnion", Union[NormalChannelInfo, OpenChannelInfo])

@deserializer(ChannelInfoUnion)
def deserialize_channel_info_union(data: JSON) -> ChannelInfoUnion:
    if "openLink" in data:
        return OpenChannelInfo.deserialize(data)
    else:
        return NormalChannelInfo.deserialize(data)

setattr(ChannelInfoUnion, "deserialize", deserialize_channel_info_union)


UserInfoUnion = NewType("UserInfoUnion", Union[NormalChannelUserInfo, OpenChannelUserInfo])

@deserializer(UserInfoUnion)
def deserialize_user_info_union(data: JSON) -> UserInfoUnion:
    if "perm" in data:
        return OpenChannelUserInfo.deserialize(data)
    else:
        return NormalChannelUserInfo.deserialize(data)

setattr(UserInfoUnion, "deserialize", deserialize_user_info_union)


@dataclass
class Receipt(SerializableAttrs):
    userId: Long
    chatId: Long

@dataclass
class PortalChannelParticipantInfo(SerializableAttrs):
    participants: list[UserInfoUnion]
    kickedUserIds: list[Long]

@dataclass
class PortalChannelInfo(SerializableAttrs):
    name: str
    description: Optional[str] = None
    photoURL: Optional[str] = None
    linkId: Optional[Long] = None
    linkURL: Optional[str] = None
    participantInfo: Optional[PortalChannelParticipantInfo] = None # May set to None to skip participant update
    channel_info: Optional[ChannelInfoUnion] = None # Should be set manually by caller


@dataclass
class ChannelProps(SerializableAttrs):
    id: Long
    type: ChannelType
    link_id: Optional[Long]


# TODO Add non-media types, like polls & maps
TO_MSGTYPE_MAP: dict[MessageType, KnownChatType] = {
    MessageType.TEXT: KnownChatType.TEXT,
    MessageType.IMAGE: KnownChatType.PHOTO,
    MessageType.STICKER: KnownChatType.PHOTO,
    MessageType.VIDEO: KnownChatType.VIDEO,
    MessageType.AUDIO: KnownChatType.AUDIO,
    MessageType.FILE: KnownChatType.FILE,
}

# https://stackoverflow.com/a/483833
FROM_MSGTYPE_MAP: dict[KnownChatType, MessageType] = {v: k for k, v in TO_MSGTYPE_MAP.items()}


# TODO Consider allowing custom power/perm mappings
#      But must update default user level & permissions to match!

FROM_PERM_MAP: dict[OpenChannelUserPerm, int] = {
    OpenChannelUserPerm.OWNER: 100,
    OpenChannelUserPerm.MANAGER: 50,
    # TODO Decide on an appropriate value for this
    OpenChannelUserPerm.BOT: 25,
    OpenChannelUserPerm.NONE: 0
}

# NOTE Using a class to make this look like a dict
class TO_PERM_MAP:
    @staticmethod
    def get(key: int) -> OpenChannelUserPerm:
        if key >= 100:
            return OpenChannelUserPerm.OWNER
        if key >= 50:
            return OpenChannelUserPerm.MANAGER
        return OpenChannelUserPerm.NONE