use nom::{
	IResult,
	character::complete::alphanumeric0,
	character::complete::alphanumeric1,	
	character::complete::anychar,
	bytes::complete::tag,
	multi::many1,
	multi::many0,
	//branch::alt,
	//combinator::opt,
	sequence::tuple
};

fn command(i: &str) -> IResult<&str, String> {
	match tuple((anychar,alphanumeric0))(i) {
		Ok((rest, (c, s))) => {
			let tmp = format!("{}{}", c, s);
			Ok((rest, tmp))
		},
		Err(e) => Err(e)
	}
}

fn parameter(i: &str) -> IResult<&str, &str> {
	alphanumeric1(i)
}

fn ligature(i: &str) -> IResult<&str, char> {
	match tag(";")(i) {
		Ok((rest, c)) =>
			Ok((rest, c.chars().nth(0).unwrap())),
		Err(e) => Err(e)
	}
}

fn command_line(i: &str) -> IResult<&str, Vec<String>> {
	match tuple((command, many0(parameter)))(i) {
		Ok((rest, (com, params))) => {
			let mut cmd = vec!(com);
			params.iter().for_each(|p| cmd.push(String::from(*p)));
			Ok((rest, cmd))
		},
		Err(e) => Err(e)
	}
}

fn command_string(i: &str) -> IResult<&str, Vec<(Vec<String>,char)>> {
	many1(tuple((command_line, ligature)))(i)
}