use nom::error::Error;
use nom::Err;
use pretty_hex::pretty_hex;

fn error_to_string(e: Error<&[u8]>) -> String {
    format!(
        "parsing error: {:?}: input:{}",
        e.code,
        get_pretty_hex(&e.input)
    )
}

pub(crate) fn get_pretty_hex(input: &[u8]) -> String {
    let mut s = String::new();
    for l in pretty_hex(&input).split('\n') {
        s += &format!("\n{}", l);
    }
    s
}

pub(crate) fn nom_err_to_string(e: Err<Error<&[u8]>>) -> String {
    match e {
        Err::Incomplete(_) => e.to_string(),
        Err::Error(er) => error_to_string(er),
        Err::Failure(er) => error_to_string(er),
    }
}