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pub use ethereum::{
    TransactionAction, TransactionV2 as Transaction,
};
use sp_core::{H160, H256, U256};
use fp_evm::{CallOrCreateInfo, CheckEvmTransactionInput};
use frame_support::dispatch::{DispatchErrorWithPostInfo, PostDispatchInfo};
use codec::{Decode, Encode};
use sp_std::{result::Result, vec::Vec};

#[allow(dead_code)]
pub trait ValidatedTransaction {
    fn apply(
        source: H160,
        transaction: Transaction,
    ) -> Result<(PostDispatchInfo, CallOrCreateInfo), DispatchErrorWithPostInfo>;
}

#[derive(Clone, Debug, Eq, PartialEq, Encode, Decode)]
pub struct TransactionData {
    pub action: TransactionAction,
    pub input: Vec<u8>,
    pub nonce: U256,
    pub gas_limit: U256,
    pub gas_price: Option<U256>,
    pub max_fee_per_gas: Option<U256>,
    pub max_priority_fee_per_gas: Option<U256>,
    pub value: U256,
    pub chain_id: Option<u64>,
    pub access_list: Vec<(H160, Vec<H256>)>,
    pub proof_size_base_cost: Option<u64>,
}

impl TransactionData {
    #[allow(clippy::too_many_arguments)]
    pub fn new(
        action: TransactionAction,
        input: Vec<u8>,
        nonce: U256,
        gas_limit: U256,
        gas_price: Option<U256>,
        max_fee_per_gas: Option<U256>,
        max_priority_fee_per_gas: Option<U256>,
        value: U256,
        chain_id: Option<u64>,
        access_list: Vec<(H160, Vec<H256>)>,
    ) -> Self {
        let mut transaction_data = Self {
            action,
            input,
            nonce,
            gas_limit,
            gas_price,
            max_fee_per_gas,
            max_priority_fee_per_gas,
            value,
            chain_id,
            access_list,
            proof_size_base_cost: None,
        };
        let proof_size_base_cost = transaction_data
            .encode()
            .len()
            // signature
            .saturating_add(65)
            // pallet index
            .saturating_add(1)
            // call index
            .saturating_add(1) as u64;
        transaction_data.proof_size_base_cost = Some(proof_size_base_cost);

        transaction_data
    }
}

impl From<TransactionData> for CheckEvmTransactionInput {
    fn from(t: TransactionData) -> Self {
        CheckEvmTransactionInput {
            to: if let TransactionAction::Call(to) = t.action {
                Some(to)
            } else {
                None
            },
            chain_id: t.chain_id,
            input: t.input,
            nonce: t.nonce,
            gas_limit: t.gas_limit,
            gas_price: t.gas_price,
            max_fee_per_gas: t.max_fee_per_gas,
            max_priority_fee_per_gas: t.max_priority_fee_per_gas,
            value: t.value,
            access_list: t.access_list,
        }
    }
}

impl From<&Transaction> for TransactionData {
    fn from(t: &Transaction) -> Self {
        // The call wrapped in the extrinsic is part of the PoV, record this as a base cost for the size of the proof.
        let proof_size_base_cost = t
            .encode()
            .len()
            // pallet index
            .saturating_add(1)
            // call index
            .saturating_add(1) as u64;

        match t {
            Transaction::Legacy(t) => TransactionData {
                action: t.action,
                input: t.input.clone(),
                nonce: t.nonce,
                gas_limit: t.gas_limit,
                gas_price: Some(t.gas_price),
                max_fee_per_gas: None,
                max_priority_fee_per_gas: None,
                value: t.value,
                chain_id: t.signature.chain_id(),
                access_list: Vec::new(),
                proof_size_base_cost: Some(proof_size_base_cost),
            },
            Transaction::EIP2930(t) => TransactionData {
                action: t.action,
                input: t.input.clone(),
                nonce: t.nonce,
                gas_limit: t.gas_limit,
                gas_price: Some(t.gas_price),
                max_fee_per_gas: None,
                max_priority_fee_per_gas: None,
                value: t.value,
                chain_id: Some(t.chain_id),
                access_list: t
                    .access_list
                    .iter()
                    .map(|d| (d.address, d.storage_keys.clone()))
                    .collect(),
                proof_size_base_cost: Some(proof_size_base_cost),
            },
            Transaction::EIP1559(t) => TransactionData {
                action: t.action,
                input: t.input.clone(),
                nonce: t.nonce,
                gas_limit: t.gas_limit,
                gas_price: None,
                max_fee_per_gas: Some(t.max_fee_per_gas),
                max_priority_fee_per_gas: Some(t.max_priority_fee_per_gas),
                value: t.value,
                chain_id: Some(t.chain_id),
                access_list: t
                    .access_list
                    .iter()
                    .map(|d| (d.address, d.storage_keys.clone()))
                    .collect(),
                proof_size_base_cost: Some(proof_size_base_cost),
            },
        }
    }
}