use actix_web::web::{Data, Json, Query};
use lemmy_api_common::{
  community::{ListCommunities, ListCommunitiesResponse},
  context::LemmyContext,
  utils::{check_private_instance, is_admin, local_user_view_from_jwt_opt},
};
use lemmy_db_schema::source::local_site::LocalSite;
use lemmy_db_views_actor::community_view::CommunityQuery;
use lemmy_utils::error::LemmyError;

#[tracing::instrument(skip(context))]
pub async fn list_communities(
  data: Query<ListCommunities>,
  context: Data<LemmyContext>,
) -> Result<Json<ListCommunitiesResponse>, LemmyError> {
  let local_user_view = local_user_view_from_jwt_opt(data.auth.as_ref(), &context).await;
  let local_site = LocalSite::read(&mut context.pool()).await?;
  let is_admin = local_user_view.as_ref().map(|luv| is_admin(luv).is_ok());

  check_private_instance(&local_user_view, &local_site)?;

  let sort = data.sort;
  let listing_type = data.type_;
  let show_nsfw = data.show_nsfw;
  let page = data.page;
  let limit = data.limit;
  let local_user = local_user_view.map(|l| l.local_user);
  let communities = CommunityQuery {
    listing_type,
    show_nsfw,
    sort,
    local_user: local_user.as_ref(),
    page,
    limit,
    is_mod_or_admin: is_admin,
    ..Default::default()
  }
  .list(&mut context.pool())
  .await?;

  // Return the jwt
  Ok(Json(ListCommunitiesResponse { communities }))
}