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use std::error::Error as StdErr;
use std::fmt;
use std::io;

#[derive(Debug)]
pub enum Error {
    Parse(toml::de::Error),
    Io(io::Error),
}

impl StdErr for Error {
    fn source(&self) -> Option<&(dyn StdErr + 'static)> {
        match *self {
            Error::Parse(ref err) => Some(err),
            Error::Io(ref err) => Some(err),
        }
    }
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match *self {
            Error::Parse(ref err) => err.fmt(f),
            Error::Io(ref err) => err.fmt(f),
        }
    }
}

impl Clone for Error {
    fn clone(&self) -> Self {
        match *self {
            Error::Parse(ref err) => Error::Parse(err.clone()),
            Error::Io(ref err) => Error::Io(io::Error::new(err.kind(), err.to_string())),
        }
    }
}

impl From<toml::de::Error> for Error {
    fn from(o: toml::de::Error) -> Self {
        Error::Parse(o)
    }
}

impl From<io::Error> for Error {
    fn from(o: io::Error) -> Self {
        Error::Io(o)
    }
}