/*
 * Copyright 2010-2011 Ning, Inc.
 *
 * Ning licenses this file to you under the Apache License, version 2.0
 * (the "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at:
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package com.ning.billing.payment.core;

import javax.inject.Inject;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeoutException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import com.google.inject.name.Named;
import com.ning.billing.ErrorCode;
import com.ning.billing.account.api.Account;
import com.ning.billing.account.api.AccountApiException;
import com.ning.billing.account.api.AccountUserApi;
import com.ning.billing.invoice.api.Invoice;
import com.ning.billing.invoice.api.InvoicePaymentApi;
import com.ning.billing.payment.api.DefaultPayment;
import com.ning.billing.payment.api.DefaultPaymentErrorEvent;
import com.ning.billing.payment.api.DefaultPaymentInfoEvent;
import com.ning.billing.payment.api.Payment;
import com.ning.billing.payment.api.PaymentApiException;
import com.ning.billing.payment.api.PaymentStatus;
import com.ning.billing.payment.dao.PaymentAttemptModelDao;
import com.ning.billing.payment.dao.PaymentDao;
import com.ning.billing.payment.dao.PaymentModelDao;
import com.ning.billing.payment.dao.PaymentSqlDao;
import com.ning.billing.payment.dao.RefundModelDao;
import com.ning.billing.payment.dispatcher.PluginDispatcher;
import com.ning.billing.payment.plugin.api.PaymentInfoPlugin;
import com.ning.billing.payment.plugin.api.PaymentPluginApi;
import com.ning.billing.payment.plugin.api.PaymentPluginApiException;
import com.ning.billing.payment.provider.PaymentProviderPluginRegistry;
import com.ning.billing.payment.retry.AutoPayRetryService.AutoPayRetryServiceScheduler;
import com.ning.billing.payment.retry.FailedPaymentRetryService.FailedPaymentRetryServiceScheduler;
import com.ning.billing.payment.retry.PluginFailureRetryService.PluginFailureRetryServiceScheduler;
import com.ning.billing.util.api.TagApiException;
import com.ning.billing.util.api.TagUserApi;
import com.ning.billing.util.bus.Bus;
import com.ning.billing.util.bus.BusEvent;
import com.ning.billing.util.callcontext.CallContext;
import com.ning.billing.util.callcontext.CallContextFactory;
import com.ning.billing.util.callcontext.CallOrigin;
import com.ning.billing.util.callcontext.UserType;
import com.ning.billing.util.clock.Clock;
import com.ning.billing.util.dao.ObjectType;
import com.ning.billing.util.globallocker.GlobalLocker;
import com.ning.billing.util.tag.ControlTagType;
import com.ning.billing.util.tag.Tag;

import static com.ning.billing.payment.glue.PaymentModule.PLUGIN_EXECUTOR_NAMED;

public class PaymentProcessor extends ProcessorBase {

    private final InvoicePaymentApi invoicePaymentApi;
    private final TagUserApi tagUserApi;
    private final FailedPaymentRetryServiceScheduler failedPaymentRetryService;
    private final PluginFailureRetryServiceScheduler pluginFailureRetryService;
    private final AutoPayRetryServiceScheduler autoPayoffRetryService;

    private final CallContextFactory factory;
    private final Clock clock;

    private final PluginDispatcher<Payment> paymentPluginDispatcher;
    private final PluginDispatcher<Void> voidPluginDispatcher;

    private static final Logger log = LoggerFactory.getLogger(PaymentProcessor.class);
    private static final Joiner JOINER = Joiner.on(", ");

    @Inject
    public PaymentProcessor(final PaymentProviderPluginRegistry pluginRegistry,
            final AccountUserApi accountUserApi,
            final InvoicePaymentApi invoicePaymentApi,
            final TagUserApi tagUserApi,
            final FailedPaymentRetryServiceScheduler failedPaymentRetryService,
            final PluginFailureRetryServiceScheduler pluginFailureRetryService,
            final AutoPayRetryServiceScheduler autoPayoffRetryService,
            final PaymentDao paymentDao,
            final Bus eventBus,
            final Clock clock,
            final GlobalLocker locker,
            @Named(PLUGIN_EXECUTOR_NAMED) final ExecutorService executor,
            final CallContextFactory factory) {
        super(pluginRegistry, accountUserApi, eventBus, paymentDao, locker, executor);
        this.invoicePaymentApi = invoicePaymentApi;
        this.tagUserApi = tagUserApi;
        this.failedPaymentRetryService = failedPaymentRetryService;
        this.pluginFailureRetryService = pluginFailureRetryService;
        this.autoPayoffRetryService = autoPayoffRetryService;
        this.clock = clock;
        this.factory = factory;
        this.paymentPluginDispatcher = new PluginDispatcher<Payment>(executor);
        this.voidPluginDispatcher = new PluginDispatcher<Void>(executor);
    }

    public Payment getPayment(final UUID paymentId) {
        final PaymentModelDao model = paymentDao.getPayment(paymentId);
        if (model == null) {
            return null;
        }
        return getPayments(Collections.singletonList(model)).get(0);
    }


    public List<Payment> getInvoicePayments(final UUID invoiceId) {
        return getPayments(paymentDao.getPaymentsForInvoice(invoiceId));
    }


    public List<Payment> getAccountPayments(final UUID accountId) {
        return getPayments(paymentDao.getPaymentsForAccount(accountId));
    }

    private List<Payment> getPayments(final List<PaymentModelDao> payments) {
        if (payments == null) {
            return Collections.emptyList();
        }
        final List<Payment> result = new LinkedList<Payment>();
        for (final PaymentModelDao cur : payments) {
            final List<PaymentAttemptModelDao> attempts = paymentDao.getAttemptsForPayment(cur.getId());
            final List<RefundModelDao> refunds = paymentDao.getRefundsForPayment(cur.getId());
            final Payment entry = new DefaultPayment(cur, attempts, refunds);
            result.add(entry);
        }
        return result;
    }

    public void process_AUTO_PAY_OFF_removal(final Account account, final CallContext context) throws PaymentApiException  {

        try {
            voidPluginDispatcher.dispatchWithAccountLock(new CallableWithAccountLock<Void>(locker,
                    account.getExternalKey(),
                    new WithAccountLockCallback<Void>() {

                @Override
                public Void doOperation() throws PaymentApiException {

                    final List<PaymentModelDao> payments = paymentDao.getPaymentsForAccount(account.getId());
                    final Collection<PaymentModelDao> paymentsToBeCompleted = Collections2.filter(payments, new Predicate<PaymentModelDao>() {
                        @Override
                        public boolean apply(final PaymentModelDao in) {
                            // Payments left in AUTO_PAY_OFF or for which we did not retry enough
                            return (in.getPaymentStatus() == PaymentStatus.AUTO_PAY_OFF ||
                                    in.getPaymentStatus() == PaymentStatus.PAYMENT_FAILURE ||
                                    in.getPaymentStatus() == PaymentStatus.PLUGIN_FAILURE);
                        }
                    });
                    // Insert one retry event for each payment left in AUTO_PAY_OFF
                    for (PaymentModelDao cur : paymentsToBeCompleted) {
                        switch(cur.getPaymentStatus()) {
                        case AUTO_PAY_OFF:
                            autoPayoffRetryService.scheduleRetry(cur.getId(), clock.getUTCNow());
                            break;
                        case PAYMENT_FAILURE:
                            scheduleRetryOnPaymentFailure(cur.getId());
                            break;
                        case PLUGIN_FAILURE:
                            scheduleRetryOnPluginFailure(cur.getId());
                            break;
                        default:
                            // Impossible...
                            throw new RuntimeException("Unexpected case " + cur.getPaymentStatus());
                        }

                    }
                    return null;
                }
            }));
        } catch (TimeoutException e) {
            throw new PaymentApiException(ErrorCode.UNEXPECTED_ERROR, "Unexpected timeout for payment creation (AUTO_PAY_OFF)");
        }
    }

    public Payment createPayment(final Account account, final UUID invoiceId, final BigDecimal inputAmount, final CallContext context, final boolean isInstantPayment)
    throws PaymentApiException {
        final PaymentPluginApi plugin = getPaymentProviderPlugin(account);

        try {
            return paymentPluginDispatcher.dispatchWithAccountLock(new CallableWithAccountLock<Payment>(locker,
                    account.getExternalKey(),
                    new WithAccountLockCallback<Payment>() {

                @Override
                public Payment doOperation() throws PaymentApiException {


                    final Invoice invoice = invoicePaymentApi.getInvoice(invoiceId);

                    if (invoice.isMigrationInvoice()) {
                        log.error("Received invoice for payment that is a migration invoice - don't know how to handle those yet: {}", invoice);
                        return null;
                    }

                    final boolean isAccountAutoPayOff = isAccountAutoPayOff(account.getId());
                    final boolean isBadAccount = setUnsaneAccount_AUTO_PAY_OFFWithAccountLock(account.getId(), isAccountAutoPayOff, context, isInstantPayment);
                    if (isBadAccount && isInstantPayment) {
                        throw new PaymentApiException(ErrorCode.PAYMENT_BAD_ACCOUNT, account.getId());
                    }

                    final BigDecimal requestedAmount = getAndValidatePaymentAmount(invoice, inputAmount, isInstantPayment);
                    if (isAccountAutoPayOff) {
                        return processNewPaymentForAutoPayOffWithAccountLocked(account, invoice, requestedAmount, context);
                    } else {
                        return processNewPaymentWithAccountLocked(plugin, account, invoice, requestedAmount, isInstantPayment, context);
                    }
                }
            }));
        } catch (TimeoutException e) {
            if (isInstantPayment) {
                throw new PaymentApiException(ErrorCode.PAYMENT_PLUGIN_TIMEOUT, account.getId(), invoiceId);
            } else {
                log.warn(String.format("Payment from Account %s, Invoice %s timedout", account.getId(), invoiceId));
                // If we don't crash, plugin thread will complete (and set the correct status)
                // If we crash before plugin thread completes, we may end up with a UNKNOWN Payment
                // We would like to return an error so the Bus can retry but we are limited by Guava bug
                // swallowing exception
                return null;
            }
        }
    }


    private boolean setUnsaneAccount_AUTO_PAY_OFFWithAccountLock(final UUID accountId, final boolean isAccountAutoPayOff, final CallContext context, final boolean isInstantPayment)
    throws PaymentApiException  {
        final List<PaymentModelDao> payments =  paymentDao.getPaymentsForAccount(accountId);

        final Collection<PaymentModelDao> badPayments = Collections2.filter(payments, new Predicate<PaymentModelDao>() {

            @Override
            public boolean apply(PaymentModelDao input) {
                return (input.getPaymentStatus() != PaymentStatus.SUCCESS &&
                        input.getPaymentStatus() != PaymentStatus.PAYMENT_FAILURE &&
                        input.getPaymentStatus() != PaymentStatus.AUTO_PAY_OFF);
            }
        });

        if (badPayments.size() > 0) {
            if (!isInstantPayment && !isAccountAutoPayOff) {
                JOINER.join(Collections2.transform(badPayments, new Function<PaymentModelDao, String>() {

                    @Override
                    public String apply(PaymentModelDao input) {
                        return String.format("%s [%s]", input.getId(), input.getPaymentStatus());
                    }
                }));
                log.warn(String.format("Setting account %s into AUTO_PAY_OFF because of bad payments : %s", accountId, JOINER.toString()));
                try {
                    tagUserApi.addTag(accountId, ObjectType.ACCOUNT, ControlTagType.AUTO_PAY_OFF.getId(), context);
                } catch (TagApiException e) {
                    log.error("Failed to add AUTO_PAY_OFF on account " + accountId, e);
                    throw new PaymentApiException(ErrorCode.PAYMENT_INTERNAL_ERROR, "Failed to add AUTO_PAY_OFF on account " + accountId);
                }
            }
            return true;
        } else {
            return false;
        }
    }



    private BigDecimal getAndValidatePaymentAmount(final Invoice invoice, final BigDecimal inputAmount, final boolean isInstantPayment)
    throws PaymentApiException {

        if (invoice.getBalance().compareTo(BigDecimal.ZERO) <= 0) {
            throw new PaymentApiException(ErrorCode.PAYMENT_NULL_INVOICE, invoice.getId());
        }
        if (isInstantPayment &&
                inputAmount != null &&
                invoice.getBalance().compareTo(inputAmount) < 0) {
            throw new PaymentApiException(ErrorCode.PAYMENT_AMOUNT_DENIED,
                    invoice.getId(), inputAmount.floatValue(), invoice.getBalance().floatValue());
        }
        BigDecimal result =  inputAmount != null ? inputAmount : invoice.getBalance();
        return result.setScale(2, RoundingMode.HALF_EVEN);
    }


    public void retryAutoPayOff(final UUID paymentId) {
        retryFailedPaymentInternal(paymentId, PaymentStatus.AUTO_PAY_OFF);
    }

    public void retryPluginFailure(final UUID paymentId) {
        retryFailedPaymentInternal(paymentId, PaymentStatus.PLUGIN_FAILURE, PaymentStatus.TIMEDOUT);
    }

    public void retryFailedPayment(final UUID paymentId) {
        retryFailedPaymentInternal(paymentId, PaymentStatus.PAYMENT_FAILURE);
    }

    private boolean isAccountAutoPayOff(final UUID accountId) {
        final Map<String, Tag> accountTags = tagUserApi.getTags(accountId, ObjectType.ACCOUNT);
        for (final Tag cur : accountTags.values()) {
            if (ControlTagType.AUTO_PAY_OFF.getId().equals(cur.getTagDefinitionId())) {
                return true;
            }
        }
        return false;
    }


    private void retryFailedPaymentInternal(final UUID paymentId, final PaymentStatus... expectedPaymentStates) {

        try {

            final PaymentModelDao payment = paymentDao.getPayment(paymentId);
            if (payment == null) {
                log.error("Invalid retry for non existnt paymentId {}", paymentId);
                return;
            }

            if (isAccountAutoPayOff(payment.getAccountId())) {
                log.info(String.format("Skip retry payment %s in state %s because AUTO_PAY_OFF", payment.getId(), payment.getPaymentStatus()));
                return;
            }

            final Account account = accountUserApi.getAccountById(payment.getAccountId());
            final PaymentPluginApi plugin = getPaymentProviderPlugin(account);
            final CallContext context = factory.createCallContext("PaymentRetry", CallOrigin.INTERNAL, UserType.SYSTEM);

            voidPluginDispatcher.dispatchWithAccountLock(new CallableWithAccountLock<Void>(locker,
                    account.getExternalKey(),
                    new WithAccountLockCallback<Void>() {

                @Override
                public Void doOperation() throws PaymentApiException {

                    // Fetch again with account lock this time
                    final PaymentModelDao payment = paymentDao.getPayment(paymentId);
                    boolean foundExpectedState = false;
                    for (final PaymentStatus cur : expectedPaymentStates) {
                        if (payment.getPaymentStatus() == cur) {
                            foundExpectedState = true;
                            break;
                        }
                    }
                    if (!foundExpectedState) {
                        log.info("Aborted retry for payment {} because it is {} state", paymentId, payment.getPaymentStatus());
                        return null;
                    }

                    final Invoice invoice = invoicePaymentApi.getInvoice(payment.getInvoiceId());
                    if (invoice.isMigrationInvoice()) {
                        return null;
                    }
                    if (invoice.getBalance().compareTo(BigDecimal.ZERO) <= 0) {
                        log.info("Aborted retry for payment {} because invoice has been paid", paymentId);
                        return null;
                    }
                    processRetryPaymentWithAccountLocked(plugin, account, invoice, payment, invoice.getBalance(), context);
                    return null;

                }
            }));
        } catch (AccountApiException e) {
            log.error(String.format("Failed to retry payment for paymentId %s", paymentId), e);
        } catch (PaymentApiException e) {
            log.info(String.format("Failed to retry payment for paymentId %s", paymentId));
        } catch (TimeoutException e) {
            log.warn(String.format("Retry for payment %s timedout", paymentId));
            // STEPH we should throw some exception so NotificationQ does not clear status and retries us
        }
    }

    private Payment processNewPaymentForAutoPayOffWithAccountLocked(final Account account, final Invoice invoice, final BigDecimal requestedAmount, final CallContext context)
    throws PaymentApiException {

        final PaymentStatus paymentStatus =  PaymentStatus.AUTO_PAY_OFF;

        final PaymentModelDao paymentInfo = new PaymentModelDao(account.getId(), invoice.getId(), account.getPaymentMethodId(), requestedAmount, invoice.getCurrency(), clock.getUTCNow(), paymentStatus);
        final PaymentAttemptModelDao attempt = new PaymentAttemptModelDao(account.getId(), invoice.getId(), paymentInfo.getId(), paymentStatus, clock.getUTCNow(), requestedAmount);

        paymentDao.insertPaymentWithAttempt(paymentInfo, attempt, context);
        return new DefaultPayment(paymentInfo, Collections.singletonList(attempt), Collections.<RefundModelDao>emptyList());
    }


    private Payment processNewPaymentWithAccountLocked(final PaymentPluginApi plugin, final Account account, final Invoice invoice,
            final BigDecimal requestedAmount, final boolean isInstantPayment, final CallContext context) throws PaymentApiException {


        final PaymentModelDao payment = new PaymentModelDao(account.getId(), invoice.getId(), account.getPaymentMethodId(), requestedAmount.setScale(2, RoundingMode.HALF_EVEN), invoice.getCurrency(), clock.getUTCNow());
        final PaymentAttemptModelDao attempt = new PaymentAttemptModelDao(account.getId(), invoice.getId(), payment.getId(), clock.getUTCNow(), requestedAmount);

        final PaymentModelDao savedPayment = paymentDao.insertPaymentWithAttempt(payment, attempt, context);
        return processPaymentWithAccountLocked(plugin, account, invoice, savedPayment, attempt, isInstantPayment, context);
    }

    private Payment processRetryPaymentWithAccountLocked(final PaymentPluginApi plugin, final Account account, final Invoice invoice, final PaymentModelDao payment,
            final BigDecimal requestedAmount, final CallContext context) throws PaymentApiException {
        final PaymentAttemptModelDao attempt = new PaymentAttemptModelDao(account.getId(), invoice.getId(), payment.getId(), clock.getUTCNow(), requestedAmount);
        paymentDao.insertNewAttemptForPayment(payment.getId(), attempt, context);
        return processPaymentWithAccountLocked(plugin, account, invoice, payment, attempt, false, context);
    }


    private Payment processPaymentWithAccountLocked(final PaymentPluginApi plugin, final Account account, final Invoice invoice,
            final PaymentModelDao paymentInput, final PaymentAttemptModelDao attemptInput, final boolean isInstantPayment, final CallContext context) throws PaymentApiException {

        BusEvent event = null;
        List<PaymentAttemptModelDao> allAttempts = null;
        PaymentModelDao payment = null;
        PaymentStatus paymentStatus;
        try {

            final PaymentInfoPlugin paymentPluginInfo = plugin.processPayment(account.getExternalKey(), paymentInput.getId(), attemptInput.getRequestedAmount());
            switch (paymentPluginInfo.getStatus()) {
            case PROCESSED:
                // Update Payment/PaymentAttempt status
                paymentStatus = PaymentStatus.SUCCESS;
                paymentDao.updateStatusForPaymentWithAttempt(paymentInput.getId(), paymentStatus, paymentPluginInfo.getGatewayErrorCode(), null, paymentPluginInfo.getExtFirstReferenceId(), paymentPluginInfo.getExtSecondReferenceId(), attemptInput.getId(), context);

                // Fetch latest objects
                allAttempts = paymentDao.getAttemptsForPayment(paymentInput.getId());

                payment = paymentDao.getPayment(paymentInput.getId());
                invoicePaymentApi.notifyOfPayment(invoice.getId(),
                        payment.getAmount(),
                        paymentStatus == PaymentStatus.SUCCESS ? payment.getCurrency() : null,
                                payment.getId(),
                                payment.getEffectiveDate(),
                                context);

                // Create Bus event
                event = new DefaultPaymentInfoEvent(account.getId(),
                        invoice.getId(), payment.getId(), payment.getAmount(), payment.getPaymentNumber(), paymentStatus,
                        paymentPluginInfo.getExtFirstReferenceId(), paymentPluginInfo.getExtSecondReferenceId(), context.getUserToken(), payment.getEffectiveDate());
                break;

            case ERROR:
                allAttempts = paymentDao.getAttemptsForPayment(paymentInput.getId());
                // Schedule if non instant payment and max attempt for retry not reached yet
                if (!isInstantPayment) {
                    paymentStatus = scheduleRetryOnPaymentFailure(paymentInput.getId());
                } else {
                    paymentStatus = PaymentStatus.PAYMENT_FAILURE_ABORTED;
                }

                paymentDao.updateStatusForPaymentWithAttempt(paymentInput.getId(), paymentStatus, paymentPluginInfo.getGatewayErrorCode(),  paymentPluginInfo.getGatewayError(),null, null, attemptInput.getId(), context);

                log.info(String.format("Could not process payment for account %s, invoice %s, error = %s",
                        account.getId(), invoice.getId(), paymentPluginInfo.getGatewayError()));

                event = new DefaultPaymentErrorEvent(account.getId(), invoice.getId(), paymentInput.getId(), paymentPluginInfo.getGatewayError(), context.getUserToken());
                throw new PaymentApiException(ErrorCode.PAYMENT_CREATE_PAYMENT, account.getId(), paymentPluginInfo.getGatewayError());

            default:
                final String formatError = String.format("Plugin return status %s for payment %s", paymentPluginInfo.getStatus(), paymentInput.getId());
                // This caught right below as a retryable Plugin failure
                throw new PaymentPluginApiException("", formatError);
            }

        } catch (PaymentPluginApiException e) {
            //
            // An exception occurred, we are left in an unknown state, we need to schedule a retry
            //
            paymentStatus = isInstantPayment ? PaymentStatus.PAYMENT_FAILURE_ABORTED : scheduleRetryOnPluginFailure(paymentInput.getId());
            // STEPH message might need truncation to fit??

            paymentDao.updateStatusForPaymentWithAttempt(paymentInput.getId(), paymentStatus, null, e.getMessage(), null, null, attemptInput.getId(), context);

            throw new PaymentApiException(ErrorCode.PAYMENT_CREATE_PAYMENT, account.getId(), e.toString());

        } finally {
            if (event != null) {
                postPaymentEvent(event, account.getId());
            }
        }
        return new DefaultPayment(payment, allAttempts, Collections.<RefundModelDao>emptyList());
    }

    private PaymentStatus scheduleRetryOnPluginFailure(final UUID paymentId) {
        final List<PaymentAttemptModelDao> allAttempts = paymentDao.getAttemptsForPayment(paymentId);
        final int retryAttempt = getNumberAttemptsInState(paymentId, allAttempts, PaymentStatus.UNKNOWN, PaymentStatus.PLUGIN_FAILURE);
        final boolean isScheduledForRetry = pluginFailureRetryService.scheduleRetry(paymentId, retryAttempt);
        return isScheduledForRetry ? PaymentStatus.PLUGIN_FAILURE : PaymentStatus.PLUGIN_FAILURE_ABORTED;
    }

    private PaymentStatus scheduleRetryOnPaymentFailure(final UUID paymentId) {
        final List<PaymentAttemptModelDao> allAttempts = paymentDao.getAttemptsForPayment(paymentId);
        final int retryAttempt = getNumberAttemptsInState(paymentId, allAttempts,
                PaymentStatus.UNKNOWN, PaymentStatus.PAYMENT_FAILURE);
        final boolean isScheduledForRetry = failedPaymentRetryService.scheduleRetry(paymentId, retryAttempt);
        return isScheduledForRetry ? PaymentStatus.PAYMENT_FAILURE : PaymentStatus.PAYMENT_FAILURE_ABORTED;
    }

    private int getNumberAttemptsInState(final UUID paymentId, final List<PaymentAttemptModelDao> allAttempts, final PaymentStatus... statuses) {
        if (allAttempts == null || allAttempts.size() == 0) {
            return 0;
        }
        return Collections2.filter(allAttempts, new Predicate<PaymentAttemptModelDao>() {
            @Override
            public boolean apply(final PaymentAttemptModelDao input) {
                for (final PaymentStatus cur : statuses) {
                    if (input.getPaymentStatus() == cur) {
                        return true;
                    }
                }
                return false;
            }
        }).size();
    }
}
