// 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 builtin deserialization.

/// Linear pricing.
#[derive(Debug, PartialEq, Deserialize, Clone)]
pub struct Linear {
	/// Base price.
	pub base: usize,
	/// Price for word.
	pub word: usize,
}

/// Pricing variants.
#[derive(Debug, PartialEq, Deserialize, Clone)]
pub enum Pricing {
	/// Linear pricing.
	#[serde(rename="linear")]
	Linear(Linear),
}

/// Spec builtin.
#[derive(Debug, PartialEq, Deserialize, Clone)]
pub struct Builtin {
	/// Builtin name.
	pub name: String,
	/// Builtin pricing.
	pub pricing: Pricing,
}

#[cfg(test)]
mod tests {
	use serde_json;
	use spec::builtin::{Builtin, Pricing, Linear};

	#[test]
	fn builtin_deserialization() {
		let s = r#"{
			"name": "ecrecover",
			"pricing": { "linear": { "base": 3000, "word": 0 } }
		}"#;
		let deserialized: Builtin = serde_json::from_str(s).unwrap();
		assert_eq!(deserialized.name, "ecrecover");
		assert_eq!(deserialized.pricing, Pricing::Linear(Linear { base: 3000, word: 0 }));
	}
}
