use rustyline::error::ReadlineError;
use rustyline::{DefaultEditor, Result};

use nixjit::*;

fn main() -> Result<()> {
    let mut rl = DefaultEditor::new()?;
    loop {
        let readline = rl.readline("nixjit-repl> ");
        match readline {
            Ok(expr) => {
                if expr.trim().is_empty() {
                    continue;
                }
                let prog = compile(expr.as_str()).unwrap();
                println!("{}", run(prog).unwrap());
                rl.add_history_entry(expr.as_str())?;
            }
            Err(ReadlineError::Interrupted) => {
                println!("CTRL-C");
                break;
            }
            Err(ReadlineError::Eof) => {
                println!("CTRL-D");
                break;
            }
            Err(err) => {
                println!("Error: {:?}", err);
                break;
            }
        }
    }
    Ok(())
}