mod tracer;

use std::path::PathBuf;

use clap::{Parser, Subcommand};

#[derive(Parser, Debug)]
struct Cli {
    #[command(subcommand)]
    cmd: Subcommands,
}

#[derive(Subcommand, Debug, Clone)]
enum Subcommands {
    Run {
        #[arg(short, long)]
        output: Option<PathBuf>,
        cmd: Vec<String>,
    }
}

fn main() {
    env_logger::init();
    let cli = Cli::parse();
    match cli.cmd {
        Subcommands::Run { output, cmd } => {
            let fp: Box<dyn std::io::Write> = if let Some(output) = &output {
                Box::new(std::fs::File::options().write(true).create(true).open(output).unwrap())
            } else {
                Box::new(std::io::stdout())
            };
            let mut t = tracer::Tracer::new().unwrap();
            t.start_root_process(cmd).unwrap();

            if output.is_none() {
                serde_json::to_writer_pretty(fp, &t.log).unwrap();
            } else {
                serde_json::to_writer(fp, &t.log).unwrap();
            }
        }
    }
}