use crate::{
  activities::{
    community::send_activity_in_community,
    generate_activity_id,
    verify_is_public,
    verify_mod_action,
    verify_person_in_community,
  },
  activity_lists::AnnouncableActivities,
  insert_received_activity,
  objects::{community::ApubCommunity, person::ApubPerson},
  protocol::{activities::community::update::UpdateCommunity, InCommunity},
};
use activitypub_federation::{
  config::Data,
  kinds::{activity::UpdateType, public},
  traits::{ActivityHandler, Actor, Object},
};
use lemmy_api_common::context::LemmyContext;
use lemmy_db_schema::{
  source::{activity::ActivitySendTargets, community::Community, person::Person},
  traits::Crud,
};
use lemmy_utils::error::LemmyError;
use url::Url;

pub(crate) async fn send_update_community(
  community: Community,
  actor: Person,
  context: Data<LemmyContext>,
) -> Result<(), LemmyError> {
  let community: ApubCommunity = community.into();
  let actor: ApubPerson = actor.into();
  let id = generate_activity_id(
    UpdateType::Update,
    &context.settings().get_protocol_and_hostname(),
  )?;
  let update = UpdateCommunity {
    actor: actor.id().into(),
    to: vec![public()],
    object: Box::new(community.clone().into_json(&context).await?),
    cc: vec![community.id()],
    kind: UpdateType::Update,
    id: id.clone(),
    audience: Some(community.id().into()),
  };

  let activity = AnnouncableActivities::UpdateCommunity(update);
  send_activity_in_community(
    activity,
    &actor,
    &community,
    ActivitySendTargets::empty(),
    true,
    &context,
  )
  .await
}

#[async_trait::async_trait]
impl ActivityHandler for UpdateCommunity {
  type DataType = LemmyContext;
  type Error = LemmyError;

  fn id(&self) -> &Url {
    &self.id
  }

  fn actor(&self) -> &Url {
    self.actor.inner()
  }

  #[tracing::instrument(skip_all)]
  async fn verify(&self, context: &Data<Self::DataType>) -> Result<(), LemmyError> {
    insert_received_activity(&self.id, context).await?;
    verify_is_public(&self.to, &self.cc)?;
    let community = self.community(context).await?;
    verify_person_in_community(&self.actor, &community, context).await?;
    verify_mod_action(&self.actor, &community, context).await?;
    ApubCommunity::verify(&self.object, &community.actor_id.clone().into(), context).await?;
    Ok(())
  }

  #[tracing::instrument(skip_all)]
  async fn receive(self, context: &Data<Self::DataType>) -> Result<(), LemmyError> {
    let community = self.community(context).await?;

    let community_update_form = self.object.into_update_form();

    Community::update(&mut context.pool(), community.id, &community_update_form).await?;
    Ok(())
  }
}
