// Copyright 2015-2017 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/>.

//! Spec params deserialization.

use uint::Uint;
use hash::H256;

/// Spec params.
#[derive(Debug, PartialEq, Deserialize)]
pub struct Params {
	/// Account start nonce, defaults to 0.
	#[serde(rename="accountStartNonce")]
	pub account_start_nonce: Option<Uint>,
	/// Maximum size of extra data.
	#[serde(rename="maximumExtraDataSize")]
	pub maximum_extra_data_size: Uint,
	/// Minimum gas limit.
	#[serde(rename="minGasLimit")]
	pub min_gas_limit: Uint,

	/// Network id.
	#[serde(rename="networkID")]
	pub network_id: Uint,
	/// Chain id.
	#[serde(rename="chainID")]
	pub chain_id: Option<Uint>,

	/// Name of the main ("eth") subprotocol.
	#[serde(rename="subprotocolName")]
	pub subprotocol_name: Option<String>,

	/// Option fork block number to check.
	#[serde(rename="forkBlock")]
	pub fork_block: Option<Uint>,
	/// Expected fork block hash.
	#[serde(rename="forkCanonHash")]
	pub fork_hash: Option<H256>,

	/// See `CommonParams` docs.
	#[serde(rename="eip98Transition")]
	pub eip98_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="validateReceiptsTransition")]
	pub validate_receipts_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip86Transition")]
	pub eip86_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip140Transition")]
	pub eip140_transition: Option<Uint>,
}

#[cfg(test)]
mod tests {
	use serde_json;
	use uint::Uint;
	use util::U256;
	use spec::params::Params;

	#[test]
	fn params_deserialization() {
		let s = r#"{
			"maximumExtraDataSize": "0x20",
			"networkID" : "0x1",
			"chainID" : "0x15",
			"subprotocolName" : "exp",
			"minGasLimit": "0x1388",
			"accountStartNonce": "0x01"
		}"#;

		let deserialized: Params = serde_json::from_str(s).unwrap();
		assert_eq!(deserialized.maximum_extra_data_size, Uint(U256::from(0x20)));
		assert_eq!(deserialized.network_id, Uint(U256::from(0x1)));
		assert_eq!(deserialized.chain_id, Some(Uint(U256::from(0x15))));
		assert_eq!(deserialized.subprotocol_name, Some("exp".to_owned()));
		assert_eq!(deserialized.min_gas_limit, Uint(U256::from(0x1388)));
		assert_eq!(deserialized.account_start_nonce, Some(Uint(U256::from(0x01))));
	}
}
