#![allow(dead_code)]

mod common;
mod vm;

use std::{env, fs, io, process};

type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;

fn get_input_string() -> io::Result<String> {
    let args: Vec<String> = env::args().collect();
    if args.len() <= 1 {
        println!(
            "usage: {} file.asm",
            args.get(0).map(String::as_str).unwrap_or("rasp")
        );
        process::exit(1);
    } else {
        fs::read_to_string(&args[1])
    }
}

fn main() -> Result<()> {
    use vm::{
        state::State,
        obj::{
            assemble::{Asm, Assemble},
            syn::{lexer, parser},
        }
    };
    let text = get_input_string()?;
    let lexerdef = lexer::lexerdef();
    let lexer = lexerdef.lexer(&text);
    let (res, errors) = parser::parse(&lexer);
    for err in errors.iter() {
        println!("{}", err.pp(&lexer, &parser::token_epp));
    }
    if !errors.is_empty() {
        return Ok(());
    }
    let res = res.unwrap();
    let mut asm = Asm::default();
    let object = res.assemble(&mut asm)?;
    let mut state = State::new();
    state.load_object(object, 64 * 1024 * 1024)?;
    let status = state.exec()?;
    println!("exit status: {:#04x}", status);
    Ok(())
}