/*
 * 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.bus;

import java.util.Map;
import java.util.UUID;

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

import com.google.common.eventbus.Subscribe;
import com.google.inject.Inject;
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.InvoiceCreationEvent;


import com.ning.billing.payment.api.PaymentApi;
import com.ning.billing.payment.api.PaymentApiException;
import com.ning.billing.payment.core.PaymentProcessor;
import com.ning.billing.util.api.TagUserApi;
import com.ning.billing.util.callcontext.CallContext;
import com.ning.billing.util.callcontext.CallOrigin;
import com.ning.billing.util.callcontext.DefaultCallContext;
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.tag.ControlTagType;
import com.ning.billing.util.tag.Tag;

public class InvoiceHandler {

    public static final String PAYMENT_PROVIDER_KEY = "paymentProvider";

    /*
    private final static int NB_PAYMENT_THREADS = 3; // STEPH
    private final static String PAYMENT_GROUP_NAME = "payment-grp";
    private final static String PAYMENT_TH_NAME = "payment-th";
*/

    private final PaymentProcessor paymentProcessor;
    private final AccountUserApi accountUserApi;
    private final Clock clock;
    private final TagUserApi tagUserApi;
    

    private static final Logger log = LoggerFactory.getLogger(InvoiceHandler.class);

    @Inject
    public InvoiceHandler(final Clock clock,
            final AccountUserApi accountUserApi,
            final PaymentProcessor paymentProcessor,
            final TagUserApi tagUserApi) {        
        this.clock = clock;
        this.accountUserApi = accountUserApi;
        this.tagUserApi = tagUserApi;
        this.paymentProcessor = paymentProcessor;
    }


    @Subscribe
    public void processInvoiceEvent(InvoiceCreationEvent event) {
        
        log.info("Received invoice creation notification for account {} and invoice {}",
                    event.getAccountId(), event.getInvoiceId());

        Account account = null;        
        try {
            account = accountUserApi.getAccountById(event.getAccountId());
            if (isAccountAutoPayOff(account.getId())) {
                return;
            }
            CallContext context = new DefaultCallContext("PaymentRequestProcessor", CallOrigin.INTERNAL, UserType.SYSTEM, event.getUserToken(), clock);
            paymentProcessor.createPayment(account, event.getInvoiceId(), null, context, false);
        } catch(AccountApiException e) {
            log.error("Failed to process invoice payment", e);
        } catch (PaymentApiException e) {
            if (e.getCode() != ErrorCode.PAYMENT_NULL_INVOICE.getCode()) {
                log.error("Failed to process invoice payment", e);
            }
        }
    }
    
    private boolean isAccountAutoPayOff(UUID accountId) {
        Map<String, Tag> accountTags =  tagUserApi.getTags(accountId, ObjectType.ACCOUNT);
        for (Tag cur : accountTags.values()) {
            if (cur.getTagDefinitionName().equals(ControlTagType.AUTO_PAY_OFF.toString())) {
                return true;
            }
        }
        return false;
    }
}


