""" undo wrapper activity """
from dataclasses import dataclass
from typing import List
from django.apps import apps

from .base_activity import ActivityObject, Signature, resolve_remote_id
from .book import Edition


@dataclass(init=False)
class Verb(ActivityObject):
    """generic fields for activities - maybe an unecessary level of
    abstraction but w/e"""

    actor: str
    object: ActivityObject

    def action(self):
        """ usually we just want to save, this can be overridden as needed """
        self.object.to_model()


@dataclass(init=False)
class Create(Verb):
    """ Create activity """

    to: List
    cc: List
    signature: Signature = None
    type: str = "Create"


@dataclass(init=False)
class Delete(Verb):
    """ Create activity """

    to: List
    cc: List
    type: str = "Delete"

    def action(self):
        """ find and delete the activity object """
        obj = self.object.to_model(save=False, allow_create=False)
        obj.delete()


@dataclass(init=False)
class Update(Verb):
    """ Update activity """

    to: List
    type: str = "Update"

    def action(self):
        """ update a model instance from the dataclass """
        self.object.to_model(allow_create=False)


@dataclass(init=False)
class Undo(Verb):
    """ Undo an activity """

    type: str = "Undo"

    def action(self):
        """ find and remove the activity object """
        # this is so hacky but it does make it work....
        # (because you Reject a request and Undo a follow
        model = None
        if self.object.type == "Follow":
            model = apps.get_model("bookwyrm.UserFollows")
        obj = self.object.to_model(model=model, save=False, allow_create=False)
        obj.delete()


@dataclass(init=False)
class Follow(Verb):
    """ Follow activity """

    object: str
    type: str = "Follow"

    def action(self):
        """ relationship save """
        self.to_model()


@dataclass(init=False)
class Block(Verb):
    """ Block activity """

    object: str
    type: str = "Block"

    def action(self):
        """ relationship save """
        self.to_model()


@dataclass(init=False)
class Accept(Verb):
    """ Accept activity """

    object: Follow
    type: str = "Accept"

    def action(self):
        """ find and remove the activity object """
        obj = self.object.to_model(save=False, allow_create=False)
        obj.accept()


@dataclass(init=False)
class Reject(Verb):
    """ Reject activity """

    object: Follow
    type: str = "Reject"

    def action(self):
        """ find and remove the activity object """
        obj = self.object.to_model(save=False, allow_create=False)
        obj.reject()


@dataclass(init=False)
class Add(Verb):
    """Add activity """

    target: str
    object: Edition
    type: str = "Add"
    notes: str = None
    order: int = 0
    approved: bool = True

    def action(self):
        """ add obj to collection """
        target = resolve_remote_id(self.target, refresh=False)
        # we want to related field that isn't the book, this is janky af sorry
        model = [t for t in type(target)._meta.related_objects if t.name != "edition"][
            0
        ].related_model
        self.to_model(model=model)


@dataclass(init=False)
class Remove(Verb):
    """Remove activity """

    target: ActivityObject
    type: str = "Remove"

    def action(self):
        """ find and remove the activity object """
        obj = self.object.to_model(save=False, allow_create=False)
        obj.delete()


@dataclass(init=False)
class Like(Verb):
    """ a user faving an object """

    object: str
    type: str = "Like"

    def action(self):
        """ like """
        self.to_model()


@dataclass(init=False)
class Announce(Verb):
    """ boosting a status """

    object: str
    type: str = "Announce"

    def action(self):
        """ boost """
        self.to_model()