// Copyright (C) 2023 Andrew Rioux
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

use std::{error, fmt::Display};

#[derive(Debug)]
pub enum Error {
    StringParse,
    UnknownPacketType(u16),
    PacketLengthInvalid,
}

pub type Result<T> = std::result::Result<T, Error>;

impl Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Error::StringParse => write!(f, "unable to parse a string from pcap"),
            Error::UnknownPacketType(ptype) => write!(f, "unknown packet type ({ptype})"),
            Error::PacketLengthInvalid => write!(
                f,
                "received a packet with a length that mismatched the header"
            ),
        }
    }
}

impl error::Error for Error {}