#![feature(round_char_boundary)]
use crate::parser::document;
use tracing_subscriber::EnvFilter;
mod parser;
use tracing_subscriber::layer::SubscriberExt;
use tracing_subscriber::util::SubscriberInitExt;

const TEST_DOC: &'static str = include_str!("../toy_language.txt");

fn main() -> Result<(), Box<dyn std::error::Error>> {
    init_telemetry()?;
    let parsed = document(TEST_DOC);
    println!("{}\n\n\n", TEST_DOC);
    println!("{:#?}", parsed);
    opentelemetry::global::shutdown_tracer_provider();
    Ok(())
}

fn init_telemetry() -> Result<(), Box<dyn std::error::Error>> {
    let env_filter = EnvFilter::try_from_default_env().unwrap_or(EnvFilter::new("WARN"));

    // let stdout = tracing_subscriber::fmt::Layer::new()
    //     .pretty()
    //     .with_file(true)
    //     .with_line_number(true)
    //     .with_thread_ids(false)
    //     .with_target(false);

    opentelemetry::global::set_text_map_propagator(opentelemetry_jaeger::Propagator::new());
    let tracer = opentelemetry_jaeger::new_pipeline()
        .with_service_name("toy_language")
        .install_simple()?;

    let opentelemetry = tracing_opentelemetry::layer().with_tracer(tracer);

    tracing_subscriber::registry()
        .with(env_filter)
        .with(opentelemetry)
        // .with(stdout)
        .try_init()?;
    Ok(())
}