// Copyright 2015-2018 Parity Technologies (UK) Ltd.
// This file is part of Parity.

// Parity 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 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.  If not, see <http://www.gnu.org/licenses/>.

use std::fmt;

use ethstore::Error as SSError;
use hardware_wallet::Error as HardwareError;

/// Signing error
#[derive(Debug)]
pub enum SignError {
    /// Account is not unlocked
    NotUnlocked,
    /// Account does not exist.
    NotFound,
    /// Low-level hardware device error.
    Hardware(HardwareError),
    /// Low-level error from store
    SStore(SSError),
}

impl fmt::Display for SignError {
    fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
        match *self {
            SignError::NotUnlocked => write!(f, "Account is locked"),
            SignError::NotFound => write!(f, "Account does not exist"),
            SignError::Hardware(ref e) => write!(f, "{}", e),
            SignError::SStore(ref e) => write!(f, "{}", e),
        }
    }
}

impl From<HardwareError> for SignError {
    fn from(e: HardwareError) -> Self {
        SignError::Hardware(e)
    }
}

impl From<SSError> for SignError {
    fn from(e: SSError) -> Self {
        SignError::SStore(e)
    }
}