//! Logging helpers shared between the library, binaries, and integration tests.
//! Ensures we configure tracing once with sensible default filters while still
//! allowing `RUST_LOG` to override verbosity.
use std::sync::Once;
use tracing_subscriber::{fmt, EnvFilter};

static INIT: Once = Once::new();

/// Initialise tracing with a sane default filter (`warn` globally,
/// `niom_turn=info`) unless `RUST_LOG` is provided.
pub fn init_tracing() {
    init_tracing_with_default("warn,niom_turn=info");
}

/// Initialise tracing with a custom default directive that can still be
/// overridden via `RUST_LOG` at runtime.
pub fn init_tracing_with_default(default_directive: &str) {
    INIT.call_once(|| {
        let env_filter =
            EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new(default_directive));

        fmt()
            .with_env_filter(env_filter)
            .with_target(false)
            .compact()
            .init();
    });
}