// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.

// OpenEthereum 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.

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

//! Account Metadata

use std::{collections::HashMap, time::Instant};

use ethkey::{Address, Password};
use serde_derive::{Deserialize, Serialize};
use serde_json;

/// Type of unlock.
#[derive(Clone, PartialEq)]
pub enum Unlock {
    /// If account is unlocked temporarily, it should be locked after first usage.
    OneTime,
    /// Account unlocked permanently can always sign message.
    /// Use with caution.
    Perm,
    /// Account unlocked with a timeout
    Timed(Instant),
}

/// Data associated with account.
#[derive(Clone)]
pub struct AccountData {
    pub unlock: Unlock,
    pub password: Password,
}

/// Collected account metadata
#[derive(Default, Clone, Debug, PartialEq, Serialize, Deserialize)]
pub struct AccountMeta {
    /// The name of the account.
    pub name: String,
    /// The rest of the metadata of the account.
    pub meta: String,
    /// The 128-bit Uuid of the account, if it has one (brain-wallets don't).
    pub uuid: Option<String>,
}

impl AccountMeta {
    /// Read a hash map of Address -> AccountMeta
    pub fn read<R>(reader: R) -> Result<HashMap<Address, Self>, serde_json::Error>
    where
        R: ::std::io::Read,
    {
        serde_json::from_reader(reader)
    }

    /// Write a hash map of Address -> AccountMeta
    pub fn write<W>(m: &HashMap<Address, Self>, writer: &mut W) -> Result<(), serde_json::Error>
    where
        W: ::std::io::Write,
    {
        serde_json::to_writer(writer, m)
    }
}