//! TLS benchmark runner (client).
//!
//! Connects to a benchmark server, performs the protocol, and measures:
//! - Handshake latency
//! - Time-to-last-byte (TTLB)
//!
//! Outputs NDJSON records to stdout or a file.

mod args;
mod bench;
mod config;
mod error;
mod tls;

use crate::{args::Args, bench::run_benchmark, config::Config, tls::build_tls_config};
use clap::Parser;
use miette::{Context, IntoDiagnostic};
use rustls::pki_types::ServerName;
use std::{env, sync::Arc};
use tokio_rustls::TlsConnector;
use tracing::info;
use tracing_subscriber::EnvFilter;
use uuid::Uuid;

#[tokio::main]
async fn main() -> miette::Result<()> {
    let run_id = Uuid::new_v4();
    tracing_subscriber::fmt()
        .with_writer(std::io::stderr)
        .with_env_filter(EnvFilter::from_default_env())
        .with_target(false)
        .init();

    info!(
        run_id = %run_id,
        rust_version = env!("RUSTC_VERSION"),
        os = env::consts::OS,
        arch = env::consts::ARCH,
        command = env::args().collect::<Vec<_>>().join(" "),
        "benchmark started"
    );

    let args = Args::parse();

    let config: Config = if let Some(config_path) = &args.config {
        info!(config_file = %config_path.display(), "loading config from file");
        config_path.as_path().try_into()?
    } else {
        info!("using CLI arguments");
        args.try_into()?
    };

    let server_name = ServerName::try_from("localhost".to_string())
        .into_diagnostic()
        .context("invalid server name")?;

    for benchmark in &config.benchmarks {
        info!(
            proto = %benchmark.proto,
            mode = %benchmark.mode,
            payload = benchmark.payload,
            iters = benchmark.iters,
            warmup = benchmark.warmup,
            concurrency = benchmark.concurrency,
            "running benchmark"
        );

        let tls_config = build_tls_config(benchmark.mode)?;
        let tls_connector = TlsConnector::from(Arc::new(tls_config));

        run_benchmark(benchmark, &tls_connector, &server_name).await?;
    }

    Ok(())
}