// 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/>.

use ethereum_types::{Bloom as H2048, H160, H256, U256, U64};
use types::receipt::{LocalizedReceipt, RichReceipt, TransactionOutcome, TypedReceipt};
use v1::types::Log;

/// Receipt
#[derive(Debug, Serialize)]
#[serde(rename_all = "camelCase")]
pub struct Receipt {
    /// Transaction Type
    #[serde(rename = "type", skip_serializing_if = "Option::is_none")]
    pub transaction_type: Option<U64>,
    /// Transaction Hash
    pub transaction_hash: Option<H256>,
    /// Transaction index
    pub transaction_index: Option<U256>,
    /// Block hash
    pub block_hash: Option<H256>,
    /// Sender
    pub from: Option<H160>,
    /// Recipient
    pub to: Option<H160>,
    /// Block number
    pub block_number: Option<U256>,
    /// Cumulative gas used
    pub cumulative_gas_used: U256,
    /// Gas used
    pub gas_used: Option<U256>,
    /// Contract address
    pub contract_address: Option<H160>,
    /// Logs
    pub logs: Vec<Log>,
    /// State Root
    // NOTE(niklasad1): EIP98 makes this optional field, if it's missing then skip serializing it
    #[serde(skip_serializing_if = "Option::is_none", rename = "root")]
    pub state_root: Option<H256>,
    /// Logs bloom
    pub logs_bloom: H2048,
    /// Status code
    // NOTE(niklasad1): Unknown after EIP98 rules, if it's missing then skip serializing it
    #[serde(skip_serializing_if = "Option::is_none", rename = "status")]
    pub status_code: Option<U64>,
    /// Effective gas price
    pub effective_gas_price: U256,
}

impl Receipt {
    fn outcome_to_state_root(outcome: TransactionOutcome) -> Option<H256> {
        match outcome {
            TransactionOutcome::Unknown | TransactionOutcome::StatusCode(_) => None,
            TransactionOutcome::StateRoot(root) => Some(root),
        }
    }

    fn outcome_to_status_code(outcome: &TransactionOutcome) -> Option<U64> {
        match *outcome {
            TransactionOutcome::Unknown | TransactionOutcome::StateRoot(_) => None,
            TransactionOutcome::StatusCode(ref code) => Some((*code as u64).into()),
        }
    }
}

impl From<LocalizedReceipt> for Receipt {
    fn from(r: LocalizedReceipt) -> Self {
        Receipt {
            to: r.to.map(Into::into),
            from: Some(r.from),
            transaction_type: r.transaction_type.to_U64_option_id(),
            transaction_hash: Some(r.transaction_hash),
            transaction_index: Some(r.transaction_index.into()),
            block_hash: Some(r.block_hash),
            block_number: Some(r.block_number.into()),
            cumulative_gas_used: r.cumulative_gas_used,
            gas_used: Some(r.gas_used),
            contract_address: r.contract_address.map(Into::into),
            logs: r.logs.into_iter().map(Into::into).collect(),
            status_code: Self::outcome_to_status_code(&r.outcome),
            state_root: Self::outcome_to_state_root(r.outcome),
            logs_bloom: r.log_bloom,
            effective_gas_price: r.effective_gas_price,
        }
    }
}

impl From<RichReceipt> for Receipt {
    fn from(r: RichReceipt) -> Self {
        Receipt {
            from: Some(r.from),
            to: r.to.map(Into::into),
            transaction_type: r.transaction_type.to_U64_option_id(),
            transaction_hash: Some(r.transaction_hash),
            transaction_index: Some(r.transaction_index.into()),
            block_hash: None,
            block_number: None,
            cumulative_gas_used: r.cumulative_gas_used,
            gas_used: Some(r.gas_used),
            contract_address: r.contract_address.map(Into::into),
            logs: r.logs.into_iter().map(Into::into).collect(),
            status_code: Self::outcome_to_status_code(&r.outcome),
            state_root: Self::outcome_to_state_root(r.outcome),
            logs_bloom: r.log_bloom,
            effective_gas_price: r.effective_gas_price,
        }
    }
}

impl From<TypedReceipt> for Receipt {
    fn from(r: TypedReceipt) -> Self {
        let transaction_type = r.tx_type().to_U64_option_id();
        let legacy_receipt = r.receipt().clone();
        Receipt {
            from: None,
            to: None,
            transaction_type,
            transaction_hash: None,
            transaction_index: None,
            block_hash: None,
            block_number: None,
            cumulative_gas_used: legacy_receipt.gas_used,
            gas_used: None,
            contract_address: None,
            logs: legacy_receipt.logs.into_iter().map(Into::into).collect(),
            status_code: Self::outcome_to_status_code(&legacy_receipt.outcome),
            state_root: Self::outcome_to_state_root(legacy_receipt.outcome),
            logs_bloom: legacy_receipt.log_bloom,
            effective_gas_price: Default::default(),
        }
    }
}

#[cfg(test)]
mod tests {
    use ethereum_types::{Bloom, H256};
    use serde_json;
    use types::transaction::TypedTxId;
    use v1::types::{Log, Receipt};

    #[test]
    fn receipt_serialization() {
        let s = r#"{"type":"0x1","transactionHash":"0x0000000000000000000000000000000000000000000000000000000000000000","transactionIndex":"0x0","blockHash":"0xed76641c68a1c641aee09a94b3b471f4dc0316efe5ac19cf488e2674cf8d05b5","from":null,"to":null,"blockNumber":"0x4510c","cumulativeGasUsed":"0x20","gasUsed":"0x10","contractAddress":null,"logs":[{"address":"0x33990122638b9132ca29c723bdf037f1a891a70c","topics":["0xa6697e974e6a320f454390be03f74955e8978f1a6971ea6730542e37b66179bc","0x4861736852656700000000000000000000000000000000000000000000000000"],"data":"0x","blockHash":"0xed76641c68a1c641aee09a94b3b471f4dc0316efe5ac19cf488e2674cf8d05b5","blockNumber":"0x4510c","transactionHash":"0x0000000000000000000000000000000000000000000000000000000000000000","transactionIndex":"0x0","logIndex":"0x1","transactionLogIndex":null,"type":"mined","removed":false}],"root":"0x000000000000000000000000000000000000000000000000000000000000000a","logsBloom":"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f","status":"0x1","effectiveGasPrice":"0x0"}"#;

        let receipt = Receipt {
            from: None,
            to: None,
            transaction_type: TypedTxId::AccessList.to_U64_option_id(),
            transaction_hash: Some(H256::zero()),
            transaction_index: Some(0.into()),
            block_hash: Some(
                "ed76641c68a1c641aee09a94b3b471f4dc0316efe5ac19cf488e2674cf8d05b5"
                    .parse()
                    .unwrap(),
            ),
            block_number: Some(0x4510c.into()),
            cumulative_gas_used: 0x20.into(),
            gas_used: Some(0x10.into()),
            contract_address: None,
            logs: vec![Log {
                address: "33990122638b9132ca29c723bdf037f1a891a70c".parse().unwrap(),
                topics: vec![
                    "a6697e974e6a320f454390be03f74955e8978f1a6971ea6730542e37b66179bc"
                        .parse()
                        .unwrap(),
                    "4861736852656700000000000000000000000000000000000000000000000000"
                        .parse()
                        .unwrap(),
                ],
                data: vec![].into(),
                block_hash: Some(
                    "ed76641c68a1c641aee09a94b3b471f4dc0316efe5ac19cf488e2674cf8d05b5"
                        .parse()
                        .unwrap(),
                ),
                block_number: Some(0x4510c.into()),
                transaction_hash: Some(H256::zero()),
                transaction_index: Some(0.into()),
                transaction_log_index: None,
                log_index: Some(1.into()),
                log_type: "mined".into(),
                removed: false,
            }],
            logs_bloom: Bloom::from_low_u64_be(15),
            state_root: Some(H256::from_low_u64_be(10)),
            status_code: Some(1u64.into()),
            effective_gas_price: Default::default(),
        };

        let serialized = serde_json::to_string(&receipt).unwrap();
        assert_eq!(serialized, s);
    }
}