use schala_repl::{run_noninteractive, start_repl, ProgrammingLanguageInterface};

use std::process::exit;

fn main() {
    let args: Vec<String> = std::env::args().collect();
    let matches = command_line_options()
        .parse(&args[1..])
        .unwrap_or_else(|e| {
            eprintln!("Error parsing options: {}", e);
            exit(1);
        });

    if matches.opt_present("help") {
        println!("{}", command_line_options().usage("Schala metainterpreter"));
        exit(0);
    }

    let langs: Vec<Box<dyn ProgrammingLanguageInterface>> =
        vec![Box::new(schala_lang::Schala::new())];

    if matches.free.is_empty() {
        start_repl(langs);
    } else {
        run_noninteractive(&matches.free[0], langs);
    }
}

fn command_line_options() -> getopts::Options {
    let mut options = getopts::Options::new();
    options.optflag("h", "help", "Show help text");
    options.optflag("w", "webapp", "Start up web interpreter");
    options
}