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// 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/>.

//! Spec params deserialization.

use uint::{self, Uint};
use hash::{H256, Address};
use bytes::Bytes;

/// 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 main EthashParams docs.
	#[serde(rename="eip150Transition")]
	pub eip150_transition: Option<Uint>,

	/// See main EthashParams docs.
	#[serde(rename="eip160Transition")]
	pub eip160_transition: Option<Uint>,

	/// See main EthashParams docs.
	#[serde(rename="eip161abcTransition")]
	pub eip161abc_transition: Option<Uint>,
	/// See main EthashParams docs.
	#[serde(rename="eip161dTransition")]
	pub eip161d_transition: Option<Uint>,

	/// See `CommonParams` docs.
	#[serde(rename="eip98Transition")]
	pub eip98_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip155Transition")]
	pub eip155_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="validateChainIdTransition")]
	pub validate_chain_id_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>,
	/// See `CommonParams` docs.
	#[serde(rename="eip210Transition")]
	pub eip210_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip210ContractAddress")]
	pub eip210_contract_address: Option<Address>,
	/// See `CommonParams` docs.
	#[serde(rename="eip210ContractCode")]
	pub eip210_contract_code: Option<Bytes>,
	/// See `CommonParams` docs.
	#[serde(rename="eip210ContractGas")]
	pub eip210_contract_gas: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip211Transition")]
	pub eip211_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip145Transition")]
	pub eip145_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip214Transition")]
	pub eip214_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="eip658Transition")]
	pub eip658_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="dustProtectionTransition")]
	pub dust_protection_transition: Option<Uint>,
	/// See `CommonParams` docs.
	#[serde(rename="nonceCapIncrement")]
	pub nonce_cap_increment: Option<Uint>,
	/// See `CommonParams` docs.
	pub remove_dust_contracts : Option<bool>,
	/// See `CommonParams` docs.
	#[serde(rename="gasLimitBoundDivisor")]
	#[serde(deserialize_with="uint::validate_non_zero")]
	pub gas_limit_bound_divisor: Uint,
	/// See `CommonParams` docs.
	pub registrar: Option<Address>,
	/// Apply reward flag
	#[serde(rename="applyReward")]
	pub apply_reward: Option<bool>,
	/// Node permission contract address.
	#[serde(rename="nodePermissionContract")]
	pub node_permission_contract: Option<Address>,
	/// See main EthashParams docs.
	#[serde(rename="maxCodeSize")]
	pub max_code_size: Option<Uint>,
	/// Maximum size of transaction RLP payload.
	#[serde(rename="maxTransactionSize")]
	pub max_transaction_size: Option<Uint>,
	/// See main EthashParams docs.
	#[serde(rename="maxCodeSizeTransition")]
	pub max_code_size_transition: Option<Uint>,
	/// Transaction permission contract address.
	#[serde(rename="transactionPermissionContract")]
	pub transaction_permission_contract: Option<Address>,
	/// Wasm activation block height, if not activated from start
	#[serde(rename="wasmActivationTransition")]
	pub wasm_activation_transition: Option<Uint>,
}

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

	#[test]
	fn params_deserialization() {
		let s = r#"{
			"maximumExtraDataSize": "0x20",
			"networkID" : "0x1",
			"chainID" : "0x15",
			"subprotocolName" : "exp",
			"minGasLimit": "0x1388",
			"accountStartNonce": "0x01",
			"gasLimitBoundDivisor": "0x20",
			"maxCodeSize": "0x1000",
			"wasmActivationTransition": "0x1010"
		}"#;

		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))));
		assert_eq!(deserialized.gas_limit_bound_divisor, Uint(U256::from(0x20)));
		assert_eq!(deserialized.max_code_size, Some(Uint(U256::from(0x1000))));
		assert_eq!(deserialized.wasm_activation_transition, Some(Uint(U256::from(0x1010))));
	}

	#[test]
	#[should_panic(expected = "a non-zero value")]
	fn test_zero_value_divisor() {
		let s = r#"{
			"maximumExtraDataSize": "0x20",
			"networkID" : "0x1",
			"chainID" : "0x15",
			"subprotocolName" : "exp",
			"minGasLimit": "0x1388",
			"accountStartNonce": "0x01",
			"gasLimitBoundDivisor": "0x0",
			"maxCodeSize": "0x1000"
		}"#;

		let _deserialized: Params = serde_json::from_str(s).unwrap();
	}
}