use maildir::MailEntryError;
use mailparse::MailParseError;
use protobuf::Error as PBError;

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

#[derive(Debug)]
pub enum Error {
    IoError(std::io::Error),
    MailEntryError(MailEntryError),
    SortOrder(String),
    Setuid(String),
    Protobuf(PBError),
    PathError { msg: String, path: String },
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
        write!(f, "{:?}", self)
    }
}

impl std::error::Error for Error {}

impl From<std::io::Error> for Error {
    fn from(io_err: std::io::Error) -> Self {
        Error::IoError(io_err)
    }
}

impl From<MailEntryError> for Error {
    fn from(me_err: MailEntryError) -> Self {
        Error::MailEntryError(me_err)
    }
}

impl From<MailParseError> for Error {
    fn from(mp_err: MailParseError) -> Self {
        Error::MailEntryError(MailEntryError::ParseError(mp_err))
    }
}

impl From<PBError> for Error {
    fn from(pb_err: PBError) -> Self {
        Error::Protobuf(pb_err)
    }
}