pub mod redis;
pub mod nats;

use async_trait::async_trait;
use thiserror::Error;
use tokio::sync::mpsc;

#[derive(Error, Debug)]
pub enum MessageBusError {
    #[error("Redis error: {0}")]
    Redis(String),
    #[error("NATS error: {0}")]
    Nats(String),
    #[error("Connection closed")]
    ConnectionClosed,
    #[error("Channel not found: {0}")]
    ChannelNotFound(String),
    #[error("Serialization error: {0}")]
    Serialization(String),
}

#[async_trait]
pub trait MessageBus: Send + Sync + 'static {
    async fn publish(&self, channel: &str, message: &[u8]) -> Result<(), MessageBusError>;
    async fn subscribe(&self, channel: &str) -> Result<mpsc::Receiver<Vec<u8>>, MessageBusError>;
    async fn unsubscribe(&self, channel: &str) -> Result<(), MessageBusError>;
    async fn close(&self) -> Result<(), MessageBusError>;
}

pub use redis::RedisMessageBus;
pub use nats::NatsMessageBus;