use nom::{
	IResult,
	character::complete::alphanumeric0,
	//character::complete::alphanumeric1,	
	character::complete::anychar,
	character::complete::space1,
	character::complete::space0,
	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, String> {
	match tuple((space1, many1(anychar)))(i) {
		Ok((rest, (_,param))) => Ok((rest, param.iter().collect::<String>())),
		Err(e) => Err(e)
	}
}

fn ligature(i: &str) -> IResult<&str, Option<char>> {
	match tuple((space0, tag(";")))(i) {
		Ok((rest, c)) =>
			Ok((rest, c.1.chars().next())),
		Err(e) => Err(e)
	}
}

pub 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(p.to_string()));
			Ok((rest, cmd))
		},
		Err(e) => Err(e)
	}
}

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