use crate::{
  activities::verify_community_matches,
  local_instance,
  objects::{community::ApubCommunity, person::ApubPerson},
  protocol::{objects::group::Group, InCommunity},
};
use activitypub_federation::{core::object_id::ObjectId, deser::helpers::deserialize_one_or_many};
use activitystreams_kinds::activity::UpdateType;
use lemmy_api_common::context::LemmyContext;
use lemmy_utils::error::LemmyError;
use serde::{Deserialize, Serialize};
use url::Url;

/// This activity is received from a remote community mod, and updates the description or other
/// fields of a local community.
#[derive(Clone, Debug, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct UpdateCommunity {
  pub(crate) actor: ObjectId<ApubPerson>,
  #[serde(deserialize_with = "deserialize_one_or_many")]
  pub(crate) to: Vec<Url>,
  // TODO: would be nice to use a separate struct here, which only contains the fields updated here
  pub(crate) object: Box<Group>,
  #[serde(deserialize_with = "deserialize_one_or_many")]
  pub(crate) cc: Vec<Url>,
  #[serde(rename = "type")]
  pub(crate) kind: UpdateType,
  pub(crate) id: Url,
  pub(crate) audience: Option<ObjectId<ApubCommunity>>,
}

#[async_trait::async_trait(?Send)]
impl InCommunity for UpdateCommunity {
  async fn community(
    &self,
    context: &LemmyContext,
    request_counter: &mut i32,
  ) -> Result<ApubCommunity, LemmyError> {
    let community: ApubCommunity = ObjectId::new(self.object.id.clone())
      .dereference(context, local_instance(context).await, request_counter)
      .await?;
    if let Some(audience) = &self.audience {
      verify_community_matches(audience, community.actor_id.clone())?;
    }
    Ok(community)
  }
}