use crate::blocks::rewards::RewardsTransaction;
use crate::common::network_paths_and_settings::block_extension_and_paths;
use crate::decode;
use crate::records::balance_sheet::operations::balance_sheet_operation_with_db;
use crate::records::record_chain::rewards_tx::{remove_reward_credit_marker, reward_credit_applied};
use crate::sled::Db;

pub async fn undo_rewards_transaction(
    transaction: RewardsTransaction,
    mining_receiver: &str,
    db: &Db,
    block_height: u32,
) {
    // remove the miner reward and delete the reward txid
    // when the block that minted it is rolled back
    let operand = "subtraction";
    let (
        _network_name,
        _padded_base_coin,
        type_str,
        _torrentpath,
        _wallet_path,
        _blockpath,
        _db_path,
        _balance_path,
        _log_path,
    ) = block_extension_and_paths();

    let value = transaction.unsigned.value;

    // Rewards are only spendable after finalization, so rollback subtracts
    // them only when that delayed credit has actually been applied.
    if reward_credit_applied(db, block_height) {
        let _ = balance_sheet_operation_with_db(db, mining_receiver, value, &type_str, operand);
        remove_reward_credit_marker(db, block_height);
    }

    let hash = decode(transaction.unsigned.hash().await).unwrap();

    // Remove the reward transaction lookup from the txid tree.
    let tree = db.open_tree("txid").unwrap();
    let key = hash;
    tree.remove(key).unwrap();
}