//! A generic HTTP uploader.

use std::{net::SocketAddr, sync::Arc, time::Duration};

use async_trait::async_trait;

use tor_error::HasKind;

use tor_rtcompat::{NetStreamProvider, Runtime, SleepProviderExt};

use crate::{UploadError, Uploader};

/// An [`Uploader`] implementation that uses `tor_dirclient` to make a direct HTTP request,

/// not over the Tor network.

///

/// The targets for this uploader are *lists* of IP addresses:

/// Each target represents a *single* directory,

/// so we attempt to upload to at most one address in each target.

pub struct DirectHttpUploader<R> {

    /// A runtime to use for opening TCP connections and creating timers.

    runtime: R,

    /// How long should we delay for 503 responses?

    polite_delay: Duration,

}

/// A failure to upload not counted under some other error type.

#[derive(Clone, Debug, thiserror::Error)]

enum HttpUploadError {

    /// The request required anonymity, and this uploader only supports direct requests.

    #[error("Request type requires anonymity")]

    RequiresAnonymity,

    /// We tried to upload to a Target with no actual addresses.

    #[error("No address for target")]

    NoAddress,

}

impl HasKind for HttpUploadError {

}

#[async_trait]

impl<R: Runtime> Uploader for DirectHttpUploader<R> {

    type Doc = dyn tor_dirclient::request::Requestable;

    type Target = Vec<SocketAddr>;

    async fn upload(

        self: Arc<Self>,

        target: Arc<Vec<SocketAddr>>,

        doc: Arc<dyn tor_dirclient::request::Requestable>,

        if doc.anonymized() != tor_dirclient::AnonymizedRequest::Direct {

            return Err(UploadError::DocumentFailedPermanently(Arc::new(

                HttpUploadError::RequiresAnonymity,

            ) as _));

        }

        let mut conn = self.connect(target.as_ref()).await?;

        let source_info = None;

        // (This method already checks for timeouts, so we don't have to.)

        let response =

            tor_dirclient::send_request(&self.runtime, &doc, &mut conn, source_info).await;

        UploadError::from_directory_response(response)

}

impl<R: Runtime> DirectHttpUploader<R> {

    /// Create a new [`DirectHttpUploader`].

    ///

    /// Does not launch any requests; use a [`Publisher`](super::Publisher) for that.

    /// Open a new connection to one of the addresses in `target`.

        /// How long should we wait for a given connect attempt to succeed or fail?

        const CONNECT_TIMEOUT: Duration = Duration::new(30, 0);

        // TODO: Happy eyeballs?

        // TODO: Return all errors?

            {

            }

        }

}