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// Copyright 2015-2019 Parity Technologies (UK) Ltd.
// This file is part of Parity Ethereum.

// Parity Ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity Ethereum 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 General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity Ethereum.  If not, see <http://www.gnu.org/licenses/>.

use std::fmt;

#[derive(Debug, PartialEq)]
pub enum Error {
    UnsupportedCipher,
    InvalidCipherParams,
    UnsupportedKdf,
    InvalidUuid,
    UnsupportedVersion,
    InvalidCiphertext,
    InvalidH256,
    InvalidPrf,
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
        match *self {
            Error::InvalidUuid => write!(f, "Invalid Uuid"),
            Error::UnsupportedVersion => write!(f, "Unsupported version"),
            Error::UnsupportedKdf => write!(f, "Unsupported kdf"),
            Error::InvalidCiphertext => write!(f, "Invalid ciphertext"),
            Error::UnsupportedCipher => write!(f, "Unsupported cipher"),
            Error::InvalidCipherParams => write!(f, "Invalid cipher params"),
            Error::InvalidH256 => write!(f, "Invalid hash"),
            Error::InvalidPrf => write!(f, "Invalid prf"),
        }
    }
}

impl Into<String> for Error {
    fn into(self) -> String { format!("{}", self) }
}