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//! Error types for GeoIP parsing.

use std::net::AddrParseError;
use std::num::ParseIntError;
use thiserror::Error;

/// An error type from the tor-geoip crate.
#[derive(Clone, Debug, Error)]
#[non_exhaustive]
pub enum Error {
    /// The GeoIP file is formatted wrong.
    #[error("Invalid GeoIP data file: {0}")]
    BadFormat(&'static str),
    /// We got a country code that isn't 2 ASCII letters.
    #[error("Unsupported country code in file: {0}")]
    BadCountryCode(String),

    /// Tried to use ?? somewhere that expected a country code.
    #[error("The 'nowhere' country code ('??') is not supported in this context.")]
    NowhereNotSupported,
}

impl From<ParseIntError> for Error {
    fn from(_e: ParseIntError) -> Error {
        Error::BadFormat("can't parse number")
    }
}

impl From<AddrParseError> for Error {
    fn from(_e: AddrParseError) -> Error {
        Error::BadFormat("can't parse IPv6 address")
    }
}