use crate::PerformCrud;
use actix_web::web::Data;
use lemmy_api_common::{
  community::{CommunityResponse, DeleteCommunity},
  utils::{blocking, get_local_user_view_from_jwt},
};
use lemmy_apub::activities::deletion::{send_apub_delete_in_community, DeletableObjects};
use lemmy_db_schema::source::community::Community;
use lemmy_db_views_actor::structs::CommunityModeratorView;
use lemmy_utils::{ConnectionId, LemmyError};
use lemmy_websocket::{send::send_community_ws_message, LemmyContext, UserOperationCrud};

#[async_trait::async_trait(?Send)]
impl PerformCrud for DeleteCommunity {
  type Response = CommunityResponse;

  #[tracing::instrument(skip(context, websocket_id))]
  async fn perform(
    &self,
    context: &Data<LemmyContext>,
    websocket_id: Option<ConnectionId>,
  ) -> Result<CommunityResponse, LemmyError> {
    let data: &DeleteCommunity = self;
    let local_user_view =
      get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;

    // Fetch the community mods
    let community_id = data.community_id;
    let community_mods = blocking(context.pool(), move |conn| {
      CommunityModeratorView::for_community(conn, community_id)
    })
    .await??;

    // Make sure deleter is the top mod
    if local_user_view.person.id != community_mods[0].moderator.id {
      return Err(LemmyError::from_message("no_community_edit_allowed"));
    }

    // Do the delete
    let community_id = data.community_id;
    let deleted = data.deleted;
    let updated_community = blocking(context.pool(), move |conn| {
      Community::update_deleted(conn, community_id, deleted)
    })
    .await?
    .map_err(|e| LemmyError::from_error_message(e, "couldnt_update_community"))?;

    let res = send_community_ws_message(
      data.community_id,
      UserOperationCrud::DeleteCommunity,
      websocket_id,
      Some(local_user_view.person.id),
      context,
    )
    .await?;

    // Send apub messages
    let deletable = DeletableObjects::Community(Box::new(updated_community.clone().into()));
    send_apub_delete_in_community(
      local_user_view.person,
      updated_community,
      deletable,
      None,
      deleted,
      context,
    )
    .await?;

    Ok(res)
  }
}
