use std::io;
use std::path::Path;

use boa_interner::Interner;
use boa_parser::Parser;
use boa_parser::Source;

use crate::js::JsCompiler;
use crate::runtime::Runtime;

mod js;
mod ion;
mod runtime;

#[derive(Debug)]
pub enum RelJsError {
    IoError(io::Error),
    JsParseError(boa_parser::Error),
    BytecodeEOF,
}

impl From<io::Error> for RelJsError {
    fn from(value: io::Error) -> Self {
        RelJsError::IoError(value)
    }
}

impl From<boa_parser::Error> for RelJsError {
    fn from(value: boa_parser::Error) -> Self {
        RelJsError::JsParseError(value)
    }
}

#[tokio::main]
async fn main() -> Result<(), RelJsError> {
    let src = Source::from_filepath(Path::new("demo/script.js"))?;
    let mut parser = Parser::new(src);
    let mut interner = Interner::new();
    let script = parser.parse_script(&mut interner)?;

    let mut compiler = JsCompiler::new(interner);
    compiler.compile_script(script);
    compiler.dump();

    let mut runtime = Runtime::from(compiler);

    let function_id = runtime.to_symbol_id("main")
        .expect("script.js is missing a main function");
    
    let mut result = runtime.invoke(function_id, vec![]);
    while let Some(value) = result.recv().await {
        println!("Result:");
        for b in value.bytes() {
            print!("{b:02x} ");
        }
        println!("\n");
    }

    Ok(())
}