use std::fmt;

/// An error that happenned when creating a nettext encoder term
#[derive(Debug)]
pub enum Error {
    InvalidCharacter(u8),
    InvalidRaw,
    NotADictionnary,
    DuplicateKey(String),
    ListInList,
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            Error::InvalidCharacter(c) => write!(f, "Invalid character '{}'", *c as char),
            Error::InvalidRaw => write!(f, "Invalid RAW nettext litteral"),
            Error::NotADictionnary => write!(f, "Tried to insert into a term that isn't a dictionnary"),
            Error::DuplicateKey(s) => write!(f, "Duplicate dict key: {}", s),
            Error::ListInList => write!(f, "Refusing to build nested lists with list(), use either list_flatten() or list_nested()"),
        }
    }
}