// 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/>.

//! Spec seal deserialization.

use crate::{bytes::Bytes, hash::*, uint::Uint};

/// Ethereum seal.
#[derive(Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
#[serde(rename_all = "camelCase")]
pub struct Ethereum {
    /// Seal nonce.
    pub nonce: H64,
    /// Seal mix hash.
    pub mix_hash: H256,
}

/// AuthorityRound seal.
#[derive(Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct AuthorityRoundSeal {
    /// Seal step.
    pub step: Uint,
    /// Seal signature.
    pub signature: H520,
}

/// Tendermint seal.
#[derive(Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct TendermintSeal {
    /// Seal round.
    pub round: Uint,
    /// Proposal seal signature.
    pub proposal: H520,
    /// Proposal seal signature.
    pub precommits: Vec<H520>,
}

/// Seal variants.
#[derive(Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
#[serde(rename_all = "camelCase")]
pub enum Seal {
    /// Ethereum seal.
    Ethereum(Ethereum),
    /// AuthorityRound seal.
    AuthorityRound(AuthorityRoundSeal),
    /// Tendermint seal.
    Tendermint(TendermintSeal),
    /// Generic seal.
    Generic(Bytes),
}

#[cfg(test)]
mod tests {
    use crate::{
        bytes::Bytes,
        hash::*,
        spec::{AuthorityRoundSeal, Ethereum, Seal, TendermintSeal},
        uint::Uint,
    };
    use ethereum_types::{H256 as Eth256, H520 as Eth520, H64 as Eth64, U256};
    use serde_json;
    use std::str::FromStr;

    #[test]
    fn seal_deserialization() {
        let s = r#"[{
			"ethereum": {
				"nonce": "0x0000000000000042",
				"mixHash": "0x1000000000000000000000000000000000000000000000000000000000000001"
			}
		},{
			"generic": "0xe011bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa"
		},{
			"authorityRound": {
				"step": "0x0",
				"signature": "0x2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"
			}
		},{
			"tendermint": {
				"round": "0x3",
				"proposal": "0x3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003",
				"precommits": [
					"0x4000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004"
				]
			}
		}]"#;

        let deserialized: Vec<Seal> = serde_json::from_str(s).unwrap();
        assert_eq!(deserialized.len(), 4);

        // [0]
        assert_eq!(
            deserialized[0],
            Seal::Ethereum(Ethereum {
                nonce: H64(Eth64::from_str("0000000000000042").unwrap()),
                mix_hash: H256(
                    Eth256::from_str(
                        "1000000000000000000000000000000000000000000000000000000000000001"
                    )
                    .unwrap()
                )
            })
        );

        // [1]
        assert_eq!(
            deserialized[1],
            Seal::Generic(Bytes::new(vec![
                0xe0, 0x11, 0xbb, 0xe8, 0xdb, 0x4e, 0x34, 0x7b, 0x4e, 0x8c, 0x93, 0x7c, 0x1c, 0x83,
                0x70, 0xe4, 0xb5, 0xed, 0x33, 0xad, 0xb3, 0xdb, 0x69, 0xcb, 0xdb, 0x7a, 0x38, 0xe1,
                0xe5, 0x0b, 0x1b, 0x82, 0xfa
            ]))
        );

        // [2]
        assert_eq!(deserialized[2], Seal::AuthorityRound(AuthorityRoundSeal {
			step: Uint(U256::from(0x0)),
			signature: H520(Eth520::from_str("2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002").unwrap())
		}));

        // [3]
        assert_eq!(deserialized[3], Seal::Tendermint(TendermintSeal {
			round: Uint(U256::from(0x3)),
			proposal: H520(Eth520::from_str("3000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003").unwrap()),
			precommits: vec![H520(Eth520::from_str("4000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004").unwrap())]
		}));
    }
}