use neutron::{ConsumerBuilder, Message};
use serde::{Deserialize, Serialize};

#[derive(Debug, Clone, Deserialize, Serialize)]
#[allow(dead_code)]
struct Data {
    name: String,
}

impl TryFrom<Vec<u8>> for Data {
    type Error = Box<dyn std::error::Error>;

    fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
        Ok(Data {
            name: String::from_utf8(value).unwrap(),
        })
    }
}

impl From<Data> for Vec<u8> {
    fn from(val: Data) -> Self {
        val.name.as_bytes().to_vec()
    }
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    env_logger::init();
    let pulsar_config = neutron::PulsarConfig {
        endpoint_url: "pulsar://localhost".to_string(),
        endpoint_port: 6650,
    };

    let pulsar = neutron::PulsarBuilder::new()
        .with_config(pulsar_config)
        .build()
        .run();

    let consumer = ConsumerBuilder::new()
        .with_topic("test")
        .with_subscription("test")
        .with_consumer_name("test")
        .connect(&pulsar)
        .await?;

    let mut count = 0;

    while count < 1000000 {
        let response: Vec<Message<Data>> = consumer.next_batch(1000).await?;
        response.iter().for_each(|msg| {
            log::info!("Received message: {:?}", msg.payload);
            count += 1;
        });
        consumer
            .ack_all(response.into_iter().map(|msg| msg.ack).collect())
            .await?;
    }
    Ok(())
}