use std::process::ExitCode;

use rdbms_playground::cli::{Args, HELP_TEXT};
use rdbms_playground::{logging, runtime};

fn main() -> ExitCode {
    let args = match Args::from_env() {
        Ok(args) => args,
        Err(e) => {
            eprintln!("rdbms-playground: {e}");
            eprintln!("\n{HELP_TEXT}");
            return ExitCode::from(2);
        }
    };

    if args.help {
        print!("{HELP_TEXT}");
        return ExitCode::SUCCESS;
    }

    if let Err(e) = logging::init(args.log_path.as_deref()) {
        eprintln!("rdbms-playground: failed to initialise logging: {e:#}");
        return ExitCode::FAILURE;
    }

    let tokio_rt = match tokio::runtime::Runtime::new() {
        Ok(rt) => rt,
        Err(e) => {
            tracing::error!(error = %e, "failed to start tokio runtime");
            return ExitCode::FAILURE;
        }
    };

    match tokio_rt.block_on(runtime::run(args)) {
        Ok(()) => ExitCode::SUCCESS,
        Err(e) => {
            tracing::error!(error = %e, "runtime exited with error");
            eprintln!("rdbms-playground: {e:#}");
            ExitCode::FAILURE
        }
    }
}