use std::collections::VecDeque;
use std::sync::{Arc, Mutex};

use tokio::sync::broadcast;
use tracing_subscriber::{EnvFilter, fmt, layer::SubscriberExt, util::SubscriberInitExt};

use crate::log_layer::{AppLogLayer, LogLine};

pub struct LoggingHandles {
    pub log_tx: broadcast::Sender<LogLine>,
    pub log_history: Arc<Mutex<VecDeque<LogLine>>>,
}

pub fn init_tracing() -> LoggingHandles {
    let (log_tx, _) = broadcast::channel::<LogLine>(512);
    let log_history = Arc::new(Mutex::new(VecDeque::<LogLine>::new()));

    tracing_subscriber::registry()
        .with(EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info")))
        .with(fmt::layer())
        .with(AppLogLayer::new(log_tx.clone(), Arc::clone(&log_history)))
        .init();

    LoggingHandles { log_tx, log_history }
}