use crate::{
    core::object_id::ObjectId,
    data::Data,
    traits::{ActivityHandler, Actor, ApubObject},
    Error,
    LocalInstance,
};

use crate::core::signatures::verify_signature;
use actix_web::{HttpRequest, HttpResponse};
use serde::de::DeserializeOwned;
use tracing::debug;

/// Receive an activity and perform some basic checks, including HTTP signature verification.
pub async fn receive_activity<Activity, ActorT, Datatype>(
    request: HttpRequest,
    activity: Activity,
    local_instance: &LocalInstance,
    data: &Data<Datatype>,
) -> Result<HttpResponse, <Activity as ActivityHandler>::Error>
where
    Activity: ActivityHandler<DataType = Datatype> + DeserializeOwned + Send + 'static,
    ActorT: ApubObject<DataType = Datatype> + Actor + Send + 'static,
    for<'de2> <ActorT as ApubObject>::ApubType: serde::Deserialize<'de2>,
    <Activity as ActivityHandler>::Error: From<anyhow::Error>
        + From<Error>
        + From<<ActorT as ApubObject>::Error>
        + From<serde_json::Error>,
    <ActorT as ApubObject>::Error: From<Error> + From<anyhow::Error>,
{
    local_instance.verify_url_and_domain(&activity).await?;

    let request_counter = &mut 0;
    let actor = ObjectId::<ActorT>::new(activity.actor().clone())
        .dereference(data, local_instance, request_counter)
        .await?;

    verify_signature(
        request.headers(),
        request.method(),
        request.uri(),
        actor.public_key(),
    )?;

    debug!("Receiving activity {}", activity.id().to_string());
    activity.receive(data, request_counter).await?;
    Ok(HttpResponse::Ok().finish())
}