use std::io::{self, IsTerminal};
use std::process::ExitCode;
use std::{error::Error as StdError, sync::Arc};

use clap::{ColorChoice, Parser as _};
use tracing_human_layer::HumanLayer;
use tracing_subscriber::util::SubscriberInitExt;
use tracing_subscriber::{EnvFilter, layer::SubscriberExt};

fn main_wrapped() -> Result<(), Box<dyn StdError + Send + Sync + 'static>> {
    let args = Arc::new(dynix::Args::parse());

    let success = dynix::_CLI_ENABLE_COLOR.set(match args.color {
        ColorChoice::Always => true,
        ColorChoice::Auto => io::stdin().is_terminal(),
        ColorChoice::Never => false,
    });
    if cfg!(debug_assertions) {
        success.expect("logic error in CLI_ENABLE_COLOR");
    }

    tracing_subscriber::registry()
        .with(HumanLayer::new().with_color_output(*dynix::SHOULD_COLOR))
        .with(EnvFilter::from_default_env())
        .init();

    tracing::debug!("Parsed command-line arguments: {args:?}");

    use dynix::args::Subcommand::*;
    match &args.subcommand {
        Append(append_args) => dynix::do_append(args.clone(), append_args.clone())?,
    };

    Ok(())
}

fn main() -> ExitCode {
    match main_wrapped() {
        Ok(_) => ExitCode::SUCCESS,
        Err(e) => {
            eprintln!("dynix: error: {}", e);
            ExitCode::FAILURE
        }
    }
}