from datetime import datetime, timezone

from auth.authenticate import login_required
from base.orm import local_session
from base.resolvers import mutation
from orm.rbac import Resource
from orm.shout import Shout, ShoutAuthor, ShoutTopic
from orm.collab import Collab
from services.inbox import MessagesStorage
from orm.topic import TopicFollower
from orm.user import User
from resolvers.zine.reactions import reactions_follow, reactions_unfollow
from services.zine.gittask import GitTask
from resolvers.inbox.chats import create_chat


@mutation.field("createShout")
@login_required
async def create_shout(_, info, inp):
    user = info.context["request"].user

    topic_slugs = inp.get("topic_slugs", [])
    if topic_slugs:
        del inp["topic_slugs"]
    body = inp.get("body")
    with local_session() as session:
        if body:
            # now we should create a draft shout (can be viewed only by authors)
            authors = inp.get("authors", [])
            new_shout = Shout.create({
                "title": inp.get("title", body[:12] + '...'),
                "body": body,
                "authors": authors,
                "topics": inp.get("topics", []),
                "mainTopic": inp.get("topics", []).pop(),
                "visibility": "authors"
            })
            authors.remove(user.slug)
            if authors:
                chat = create_chat(None, info, new_shout.title, members=authors)
                # create a cooperative chatroom
                MessagesStorage.register_chat(chat)
                # now we should create a collab
                new_collab = Collab.create({
                    "shout": new_shout.id,
                    "authors": [user.slug, ],
                    "invites": authors
                })
                session.add(new_collab)

        # NOTE: shout made by one first author
        sa = ShoutAuthor.create(shout=new_shout.slug, user=user.slug)
        session.add(sa)

        reactions_follow(user, new_shout.slug, True)

        if "mainTopic" in inp:
            topic_slugs.append(inp["mainTopic"])

        for slug in topic_slugs:
            st = ShoutTopic.create(shout=new_shout.slug, topic=slug)
            session.add(st)
            tf = session.query(TopicFollower).where(follower=user.slug, topic=slug)
            if not tf:
                tf = TopicFollower.create(follower=user.slug, topic=slug, auto=True)
                session.add(tf)

        new_shout.topic_slugs = topic_slugs
        session.add(new_shout)

        session.commit()

    GitTask(inp, user.username, user.email, "new shout %s" % (new_shout.slug))

    return {"shout": new_shout}


@mutation.field("updateShout")
@login_required
async def update_shout(_, info, inp):
    auth = info.context["request"].auth
    user_id = auth.user_id
    slug = inp["slug"]

    with local_session() as session:
        user = session.query(User).filter(User.id == user_id).first()
        shout = session.query(Shout).filter(Shout.slug == slug).first()
        if not shout:
            return {"error": "shout not found"}

        authors = [author.id for author in shout.authors]
        if user_id not in authors:
            scopes = auth.scopes
            print(scopes)
            if Resource.shout_id not in scopes:
                return {"error": "access denied"}
        else:
            shout.update(inp)
            shout.updatedAt = datetime.now(tz=timezone.utc)
            session.add(shout)
            if inp.get("topics"):
                # remove old links
                links = session.query(ShoutTopic).where(ShoutTopic.shout == slug).all()
                for topiclink in links:
                    session.delete(topiclink)
                # add new topic links
                for topic in inp.get("topics", []):
                    ShoutTopic.create(shout=slug, topic=topic)
            session.commit()

    GitTask(inp, user.username, user.email, "update shout %s" % (slug))

    return {"shout": shout}


@mutation.field("deleteShout")
@login_required
async def delete_shout(_, info, slug):
    auth = info.context["request"].auth
    user_id = auth.user_id

    with local_session() as session:
        shout = session.query(Shout).filter(Shout.slug == slug).first()
        authors = [a.id for a in shout.authors]
        if not shout:
            return {"error": "invalid shout slug"}
        if user_id not in authors:
            return {"error": "access denied"}
        for a in authors:
            reactions_unfollow(a.slug, slug, True)
        shout.deletedAt = datetime.now(tz=timezone.utc)
        session.add(shout)
        session.commit()

    return {}