import asyncio
from datetime import datetime
from sqlalchemy import Column, DateTime, ForeignKey, Boolean
from base.orm import Base
from orm.reaction import Reaction
from orm.topic import ShoutTopic
from enum import Enum as Enumeration
from sqlalchemy.types import Enum as ColumnEnum


class ReactionKind(Enumeration):
    AGREE = 1  # +1
    DISAGREE = 2  # -1
    PROOF = 3  # +1
    DISPROOF = 4  # -1
    ASK = 5  # +0 bookmark
    PROPOSE = 6  # +0
    QUOTE = 7  # +0 bookmark
    COMMENT = 8  # +0
    ACCEPT = 9  # +1
    REJECT = 0  # -1
    LIKE = 11  # +1
    DISLIKE = 12  # -1
    # TYPE = <reaction index> # rating diff


def kind_to_rate(kind) -> int:
    if kind in [
        ReactionKind.AGREE,
        ReactionKind.LIKE,
        ReactionKind.PROOF,
        ReactionKind.ACCEPT,
    ]:
        return 1
    elif kind in [
        ReactionKind.DISAGREE,
        ReactionKind.DISLIKE,
        ReactionKind.DISPROOF,
        ReactionKind.REJECT,
    ]:
        return -1
    else:
        return 0


class ReactedByDay(Base):
    __tablename__ = "reacted_by_day"

    id = None  # type: ignore
    reaction = Column(ForeignKey("reaction.id"), primary_key=True)
    shout = Column(ForeignKey("shout.slug"), primary_key=True)
    replyTo = Column(ForeignKey("reaction.id"), nullable=True)
    kind = Column(ColumnEnum(ReactionKind), nullable=False, comment="Reaction kind")
    day = Column(DateTime, primary_key=True, default=datetime.now)
    comment = Column(Boolean, default=False)


class ReactedStorage:
    reacted = {"shouts": {}, "topics": {}, "reactions": {}}
    rating = {"shouts": {}, "topics": {}, "reactions": {}}
    reactions = []
    to_flush = []
    period = 30 * 60  # sec
    lock = asyncio.Lock()

    @staticmethod
    async def get_shout(shout_slug):
        self = ReactedStorage
        async with self.lock:
            return self.reacted["shouts"].get(shout_slug, [])

    @staticmethod
    async def get_topic(topic_slug):
        self = ReactedStorage
        async with self.lock:
            return self.reacted["topics"].get(topic_slug, [])

    @staticmethod
    async def get_comments(shout_slug):
        self = ReactedStorage
        async with self.lock:
            return list(
                filter(lambda r: r.comment, self.reacted["shouts"].get(shout_slug, {}))
            )

    @staticmethod
    async def get_topic_comments(topic_slug):
        self = ReactedStorage
        async with self.lock:
            return list(
                filter(lambda r: r.comment, self.reacted["topics"].get(topic_slug, {}))
            )

    @staticmethod
    async def get_reaction_comments(reaction_id):
        self = ReactedStorage
        async with self.lock:
            return list(
                filter(lambda r: r.comment, self.reacted["reactions"].get(reaction_id, {}))
            )

    @staticmethod
    async def get_reaction(reaction_id):
        self = ReactedStorage
        async with self.lock:
            return self.reacted["reactions"].get(reaction_id, [])

    @staticmethod
    async def get_rating(shout_slug):
        self = ReactedStorage
        rating = 0
        async with self.lock:
            for r in self.reacted["shouts"].get(shout_slug, []):
                rating = rating + kind_to_rate(r.kind)
        return rating

    @staticmethod
    async def get_topic_rating(topic_slug):
        self = ReactedStorage
        rating = 0
        async with self.lock:
            for r in self.reacted["topics"].get(topic_slug, []):
                rating = rating + kind_to_rate(r.kind)
        return rating

    @staticmethod
    async def get_reaction_rating(reaction_id):
        self = ReactedStorage
        rating = 0
        async with self.lock:
            for r in self.reacted["reactions"].get(reaction_id, []):
                rating = rating + kind_to_rate(r.kind)
        return rating

    @staticmethod
    async def increment(reaction: Reaction):  # type: ignore
        self = ReactedStorage
        r = {
            "day": datetime.now().replace(hour=0, minute=0, second=0, microsecond=0),
            "reaction": reaction.id,
            "kind": reaction.kind,
            "shout": reaction.shout,
        }
        if reaction.replyTo:
            r["replyTo"] = reaction.replyTo
        if reaction.body:
            r["comment"] = True
        reaction: ReactedByDay = ReactedByDay.create(**r)  # type: ignore
        self.reacted["shouts"][reaction.shout] = self.reacted["shouts"].get(reaction.shout, [])
        self.reacted["shouts"][reaction.shout].append(reaction)
        if reaction.replyTo:
            self.reacted["reaction"][reaction.replyTo] = self.reacted["reactions"].get(reaction.shout, [])
            self.reacted["reaction"][reaction.replyTo].append(reaction)
            self.rating["reactions"][reaction.replyTo] = \
                self.rating["reactions"].get(reaction.replyTo, 0) + kind_to_rate(reaction.kind)
        else:
            self.rating["shouts"][reaction.replyTo] = \
                self.rating["shouts"].get(reaction.shout, 0) + kind_to_rate(reaction.kind)

    @staticmethod
    def init(session):
        self = ReactedStorage
        all_reactions = session.query(ReactedByDay).all()
        print("[stat.reacted] %d reactions total" % len(all_reactions))
        for reaction in all_reactions:
            shout = reaction.shout
            topics = (session.query(ShoutTopic.topic).where(ShoutTopic.shout == shout).all())
            kind = reaction.kind
            self.reacted["shouts"][shout] = self.reacted["shouts"].get(shout, [])
            self.reacted["shouts"][shout].append(reaction)
            self.rating["shouts"][shout] = self.rating["shouts"].get(shout, 0) + kind_to_rate(kind)

            for t in topics:
                self.reacted["topics"][t] = self.reacted["topics"].get(t, [])
                self.reacted["topics"][t].append(reaction)
                self.rating["topics"][t] = self.rating["topics"].get(
                    t, 0
                ) + kind_to_rate(
                    kind
                )  # rating

            if reaction.replyTo:
                self.reacted["reactions"][reaction.replyTo] = \
                    self.reacted["reactions"].get(reaction.replyTo, [])
                self.reacted["reactions"][reaction.replyTo].append(reaction)
                self.rating["reactions"][reaction.replyTo] = \
                    self.rating["reactions"].get(reaction.replyTo, 0) + kind_to_rate(reaction.kind)
        ttt = self.reacted["topics"].values()
        print("[stat.reacted] %d topics reacted" % len(ttt))
        print("[stat.reacted] %d shouts reacted" % len(self.reacted["shouts"]))
        print("[stat.reacted] %d reactions reacted" % len(self.reacted["reactions"]))