use async_amqp::*;
use lapin::{
    message::DeliveryResult, options::*, publisher_confirm::Confirmation, types::FieldTable,
    BasicProperties, Connection, ConnectionProperties, Result,
};
use tracing::info;

#[async_std::main]
async fn main() -> Result<()> {
    if std::env::var("RUST_LOG").is_err() {
        std::env::set_var("RUST_LOG", "info");
    }

    tracing_subscriber::fmt::init();

    let addr = std::env::var("AMQP_ADDR").unwrap_or_else(|_| "amqp://127.0.0.1:5672/%2f".into());
    let conn = Connection::connect(&addr, ConnectionProperties::default().with_async_std()).await?;

    info!("CONNECTED");

    let channel_a = conn.create_channel().await?;
    let channel_b = conn.create_channel().await?;

    let queue = channel_a
        .queue_declare(
            "hello",
            QueueDeclareOptions::default(),
            FieldTable::default(),
        )
        .await?;

    info!(?queue, "Declared queue");

    let consumer = channel_b
        .basic_consume(
            "hello",
            "my_consumer",
            BasicConsumeOptions::default(),
            FieldTable::default(),
        )
        .await?;

    consumer.set_delegate(move |delivery: DeliveryResult| async move {
        let delivery = delivery.expect("error caught in in consumer");
        if let Some(delivery) = delivery {
            delivery
                .ack(BasicAckOptions::default())
                .await
                .expect("failed to ack");
        }
    });

    let payload = b"Hello world!";

    loop {
        let confirm = channel_a
            .basic_publish(
                "",
                "hello",
                BasicPublishOptions::default(),
                payload,
                BasicProperties::default(),
            )
            .await?
            .await?;
        assert_eq!(confirm, Confirmation::NotRequested);
    }
}