// cargo run -- --script test_vectors/fizz_buzz.lua

mod instruction;
mod loader;
mod state;
mod value;

#[cfg (test)]
mod tests;

fn main () {
	use state::State;
	
	let mut script = String::from ("test_vectors/hello.lua");
	
	let mut args = std::env::args ();
	let exe_name = args.next ().unwrap ();
	
	while let Some (arg) = args.next () {
		match arg.as_str () {
			"--script" => script = args.next ().unwrap (),
			"--" => break,
			_ => panic! ("can't parse args"),
		}
	}
	
	let lua_file = {
		let source = std::fs::read (script).expect ("couldn't load Lua source code");
		let bytecode = loader::compile_bytecode(source);
		let mut rdr = std::io::Cursor::new (bytecode);
		loader::parse_chunk (&mut rdr).unwrap ()
	};
	
	let mut vm = State::default ();
	if std::env::var("LUA_DEBUG").is_ok() {
		vm.debug_print = true;
	}
	
	let upvalues = State::upvalues_from_args ([exe_name].into_iter ().chain (args));
	
	vm.breakpoints.push (state::Breakpoint {
		block_idx: 3,
		program_counter: 0,
	});
	
	vm.execute_chunk (&lua_file, &upvalues);
}