// 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 account deserialization.

use std::collections::BTreeMap;

use crate::{bytes::Bytes, spec::builtin::BuiltinCompat, uint::Uint};

/// Spec account.
#[derive(Clone, Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
#[serde(rename_all = "camelCase")]
pub struct Account {
    /// Builtin contract.
    pub builtin: Option<BuiltinCompat>,
    /// Balance.
    pub balance: Option<Uint>,
    /// Nonce.
    pub nonce: Option<Uint>,
    /// Code.
    pub code: Option<Bytes>,
    /// Storage.
    pub storage: Option<BTreeMap<Uint, Uint>>,
    /// Constructor.
    pub constructor: Option<Bytes>,
}

impl Account {
    /// Returns true if account does not have nonce, balance, code and storage.
    pub fn is_empty(&self) -> bool {
        self.balance.is_none()
            && self.nonce.is_none()
            && self.code.is_none()
            && self.storage.is_none()
    }
}

#[cfg(test)]
mod tests {
    use crate::{bytes::Bytes, spec::account::Account, uint::Uint};
    use ethereum_types::U256;
    use serde_json;
    use std::collections::BTreeMap;

    #[test]
    fn account_balance_missing_not_empty() {
        let s = r#"{
			"nonce": "0",
			"code": "1234",
			"storage": { "0x7fffffffffffffff7fffffffffffffff": "0x1" }
		}"#;
        let deserialized: Account = serde_json::from_str(s).unwrap();
        assert!(!deserialized.is_empty());
    }

    #[test]
    fn account_nonce_missing_not_empty() {
        let s = r#"{
			"balance": "1",
			"code": "1234",
			"storage": { "0x7fffffffffffffff7fffffffffffffff": "0x1" }
		}"#;
        let deserialized: Account = serde_json::from_str(s).unwrap();
        assert!(!deserialized.is_empty());
    }

    #[test]
    fn account_code_missing_not_empty() {
        let s = r#"{
			"balance": "1",
			"nonce": "0",
			"storage": { "0x7fffffffffffffff7fffffffffffffff": "0x1" }
		}"#;
        let deserialized: Account = serde_json::from_str(s).unwrap();
        assert!(!deserialized.is_empty());
    }

    #[test]
    fn account_storage_missing_not_empty() {
        let s = r#"{
			"balance": "1",
			"nonce": "0",
			"code": "1234"
		}"#;
        let deserialized: Account = serde_json::from_str(s).unwrap();
        assert!(!deserialized.is_empty());
    }

    #[test]
    fn account_empty() {
        let s = r#"{
			"builtin": {
				"name": "ecrecover",
				"pricing": {
					"linear": {
						"base": 3000,
						"word": 0
					}
				}
			}
		}"#;
        let deserialized: Account = serde_json::from_str(s).unwrap();
        assert!(deserialized.is_empty());
    }

    #[test]
    fn account_deserialization() {
        let s = r#"{
			"balance": "1",
			"nonce": "0",
			"code": "1234",
			"builtin": {
				"name": "ecrecover",
				"pricing": {
					"linear": {
						"base": 3000,
						"word": 0
					}
				}
			}
		}"#;
        let deserialized: Account = serde_json::from_str(s).unwrap();
        assert!(!deserialized.is_empty());
        assert_eq!(deserialized.balance.unwrap(), Uint(U256::from(1)));
        assert_eq!(deserialized.nonce.unwrap(), Uint(U256::from(0)));
        assert_eq!(deserialized.code.unwrap(), Bytes::new(vec![0x12, 0x34]));
        assert!(deserialized.builtin.is_some()); // Further tested in builtin.rs
    }

    #[test]
    fn account_storage_deserialization() {
        let s = r#"{
			"balance": "1",
			"nonce": "0",
			"code": "1234",
			"storage": { "0x7fffffffffffffff7fffffffffffffff": "0x1" }
		}"#;
        let deserialized: Account = serde_json::from_str(s).unwrap();
        assert!(!deserialized.is_empty());
        assert_eq!(deserialized.balance.unwrap(), Uint(U256::from(1)));
        assert_eq!(deserialized.nonce.unwrap(), Uint(U256::from(0)));
        assert_eq!(deserialized.code.unwrap(), Bytes::new(vec![0x12, 0x34]));
        let mut storage = BTreeMap::new();
        storage.insert(
            Uint(U256::from("7fffffffffffffff7fffffffffffffff")),
            Uint(U256::from(1)),
        );
        assert_eq!(deserialized.storage.unwrap(), storage);
    }
}
