package de.rwu.easydrop.service.processing;

import de.rwu.easydrop.api.dto.TransactionDTO;
import de.rwu.easydrop.data.connector.TransactionPersistenceInterface;
import de.rwu.easydrop.model.Offer;
import de.rwu.easydrop.model.Transaction;
import de.rwu.easydrop.service.mapping.TransactionMapper;
import de.rwu.easydrop.util.Timestamp;

/**
 * Handles transactions.
 *
 * @since 0.3.0
 */
public class TransactionHandler {
    /**
     * Transaction persistence.
     */
    private TransactionPersistenceInterface txPersistence;

    /**
     * Creates new transaction handler.
     *
     * @param txdb transaction persistence
     */
    public TransactionHandler(final TransactionPersistenceInterface txdb) {
        this.txPersistence = txdb;
    }

    /**
     * Creates transaction from offer.
     *
     * @param offer Offer
     */
    public void turnOfferToTransaction(final Offer offer) {
        Transaction tx = new Transaction();
        tx.setOfferId(offer.getOfferId());
        tx.setVolume(offer.getTargetProduct().getCurrentPrice());
        tx.setEarnings(offer.getTargetProduct().getCurrentPrice()
                - offer.getSourceProduct().getCurrentPrice());
        tx.setTransactionTime(Timestamp.now());

        // Write transaction to persistence
        TransactionDTO txDTO = TransactionMapper.mapTXToDTO(tx);
        txPersistence.writeTX(txDTO);
    }
}