use myc::ast::environment::Environment;
use clap::Parser;
use std::fs;
use std::path::PathBuf;

#[derive(Parser)]
#[command(author, version, about = "MYC AST Compiler CLI", long_about = None)]
struct Cli {
    /// The script file to run
    #[arg(value_name = "FILE")]
    file: Option<PathBuf>,

    /// Run a script string directly
    #[arg(short, long)]
    eval: Option<String>,
}

fn main() {
    let cli = Cli::parse();
    let env = Environment::new();

    if let Some(script_str) = cli.eval {
        execute(&env, &script_str);
    } else if let Some(file_path) = cli.file {
        match fs::read_to_string(&file_path) {
            Ok(content) => execute(&env, &content),
            Err(e) => {
                eprintln!("Error reading file {:?}: {}", file_path, e);
                std::process::exit(1);
            }
        }
    } else {
        println!("MYC AST Compiler CLI. Use --help for usage.");
    }
}

fn execute(env: &Environment, source: &str) {
    match env.run_script(source) {
        Ok(result) => println!("{}", result),
        Err(e) => {
            eprintln!("Error: {}", e);
            std::process::exit(1);
        }
    }
}