use rocketman::ingestion::LexiconIngestor;

macro_rules! create_commit_collection {
  ($collection:ident, $nsid:expr,
    change => $change_fn:expr,
    delete => $delete_fn:expr $(,)?
  ) => (
    create_commit_collection!(
      $collection, $nsid,
      create => $change_fn,
      update => $change_fn,
      delete => $delete_fn,
    );
  );
  ($collection:ident, $nsid:expr,
    create => $create_fn:expr,
    update => $update_fn:expr,
    delete => $delete_fn:expr $(,)?
  ) => (
    pub struct $collection;
    struct Ingestor;

    impl $crate::collections::Collection for $collection {
      fn new() -> Self { Self }

      fn get_nsid(&self) -> String {
        $nsid
      }

      fn get_ingestor(
        &self
      ) -> Box<dyn rocketman::ingestion::LexiconIngestor + Send + Sync> {
        Box::new(Ingestor::new())
      }
    }

    impl Ingestor {
      pub fn new() -> Self { Self }

      pub async fn handle_commit(
        &self,
        message: rocketman::types::event::Event<serde_json::Value>
      ) -> anyhow::Result<()> {
        use rocketman::types::event::Operation;

        let state = $crate::collections::CommitIngestorState { };

        if let Some(commit) = &message.commit {
          match commit.operation {
            Operation::Create => ($create_fn)(state, message).await?,
            Operation::Update => ($update_fn)(state, message).await?,
            Operation::Delete => ($delete_fn)(state, message).await?,
          }
        } else {
          return Err(anyhow::anyhow!("Message has no commit"));
        }
        Ok(())
      }
    }

    #[async_trait::async_trait]
    impl rocketman::ingestion::LexiconIngestor for Ingestor {
      async fn ingest(
        &self,
        message: rocketman::types::event::Event<serde_json::Value>
      ) -> anyhow::Result<()> {
        self.handle_commit(message).await
      }
    }
  );
}

pub mod my_spoor_log_session;
pub use my_spoor_log_session::MySpoorLogSession;
pub mod my_spoor_log_activity;
pub use my_spoor_log_activity::MySpoorLogActivity;

struct CommitIngestorState;

pub trait Collection {
  fn new() -> Self;
  fn get_nsid(&self) -> String;
  fn get_ingestor(&self) -> Box<dyn LexiconIngestor + Send + Sync>;
}