use common::{HashType, transaction::NSSATransaction};
use keycard_wallet::KeycardWallet;
use nssa::{
    AccountId, PublicTransaction,
    program::Program,
    public_transaction::{Message, WitnessSet},
};
use sequencer_service_rpc::RpcClient as _;

use super::NativeTokenTransfer;
use crate::{ExecutionFailureKind, WalletCore};

impl NativeTokenTransfer<'_> {
    pub async fn send_public_transfer(
        &self,
        from: AccountId,
        to: AccountId,
        balance_to_move: u128,
        pin: &Option<String>,
        key_path: &Option<String>,
    ) -> Result<HashType, ExecutionFailureKind> {
        let balance = self
            .0
            .get_account_balance(from)
            .await
            .map_err(ExecutionFailureKind::SequencerError)?;

        if balance < balance_to_move {
            return Err(ExecutionFailureKind::InsufficientFundsError);
        }

        let account_ids = vec![from, to];
        let program_id = Program::authenticated_transfer_program().id();

        // Fetch nonces for both accounts unconditionally
        let nonces = self
            .0
            .get_accounts_nonces(account_ids.clone())
            .await
            .map_err(ExecutionFailureKind::SequencerError)?;

        let message = Message::try_new(program_id, account_ids, nonces, balance_to_move).unwrap();

        let witness_set = pin.as_ref().map_or_else(|| {
                 let sign_ids = self.0.filter_owned_accounts(&[from, to]);
                 WalletCore::sign_public_message(self.0, &message, &sign_ids)
                     .expect("`WalletCore::sign_public_message() failed to produce a signature for a NativeTokenTransfer.")
             }, |pin| {
                 let key_path = key_path.as_ref().expect("`NativeTokenTransfer::send_public_transfer() expected a String for `key_path`.");
                 let pub_key = KeycardWallet::get_public_key_for_path_with_connect(
                     pin,
                     key_path,
                 );
                 let signature = KeycardWallet::sign_message_for_path_with_connect(
                     pin,
                     key_path,
                     &message.hash_message(),
                 )
                 .expect("`NativeTokenTransfer::send_public_transfer() failed to produce a Signature for the given `pin` and `key_path`.");
                 WitnessSet::from_list(&[signature], &[pub_key])
             });

        let tx = PublicTransaction::new(message, witness_set);

        Ok(self
            .0
            .sequencer_client
            .send_transaction(NSSATransaction::Public(tx))
            .await?)
    }

    pub async fn register_account(
        &self,
        from: AccountId,
        pin: &Option<String>,      // Used by Keycard.
        key_path: &Option<String>, // Used by Keycard.
    ) -> Result<HashType, ExecutionFailureKind> {
        let nonces = self
            .0
            .get_accounts_nonces(vec![from])
            .await
            .map_err(ExecutionFailureKind::SequencerError)?;

        let instruction: u128 = 0;
        let account_ids = vec![from];
        let program_id = Program::authenticated_transfer_program().id();
        let message = Message::try_new(program_id, account_ids, nonces, instruction)
            .expect("Expect a valid Message");

        let witness_set = if pin.is_none() {
            let signing_key = self.0.storage.user_data.get_pub_account_signing_key(from);

            let Some(signing_key) = signing_key else {
                return Err(ExecutionFailureKind::KeyNotFoundError);
            };

            WitnessSet::for_message(&message, &[signing_key])
        } else {
            let pub_key = KeycardWallet::get_public_key_for_path_with_connect(
                pin.as_ref().expect("Expect a pin as a String."),
                key_path.as_ref().expect("Expect a key path String."),
            );

            let signature = KeycardWallet::sign_message_for_path_with_connect(
                pin.as_ref().as_ref().expect("Expect a pin as a String."),
                key_path.as_ref().expect("Expect a key path String."),
                &message.hash_message(),
            )
            .expect("Expect a valid Signature.");
            WitnessSet::from_list(&[signature], &[pub_key])
        };

        let tx = PublicTransaction::new(message, witness_set);

        Ok(self
            .0
            .sequencer_client
            .send_transaction(NSSATransaction::Public(tx))
            .await?)
    }
}