/*
 * 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.invoice.api.migration;

import java.math.BigDecimal;
import java.util.Collection;
import java.util.List;
import java.util.SortedSet;
import java.util.TreeSet;
import java.util.UUID;

import org.apache.commons.io.IOUtils;
import org.joda.time.DateTime;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Guice;
import org.testng.annotations.Test;

import com.google.inject.Inject;
import com.ning.billing.account.api.Account;
import com.ning.billing.account.api.AccountUserApi;
import com.ning.billing.catalog.MockPlan;
import com.ning.billing.catalog.MockPlanPhase;
import com.ning.billing.catalog.api.BillingPeriod;
import com.ning.billing.catalog.api.Currency;
import com.ning.billing.catalog.api.Plan;
import com.ning.billing.catalog.api.PlanPhase;
import com.ning.billing.dbi.MysqlTestingHelper;
import com.ning.billing.entitlement.api.SubscriptionTransitionType;
import com.ning.billing.entitlement.api.billing.BillingEvent;
import com.ning.billing.entitlement.api.billing.BillingModeType;
import com.ning.billing.entitlement.api.user.Subscription;
import com.ning.billing.invoice.InvoiceDispatcher;
import com.ning.billing.invoice.TestInvoiceDispatcher;
import com.ning.billing.invoice.api.Invoice;
import com.ning.billing.invoice.api.InvoiceMigrationApi;
import com.ning.billing.invoice.api.InvoicePaymentApi;
import com.ning.billing.invoice.api.InvoiceUserApi;
import com.ning.billing.invoice.dao.InvoiceDao;
import com.ning.billing.invoice.model.InvoiceGenerator;
import com.ning.billing.junction.api.BillingApi;
import com.ning.billing.junction.plumbing.billing.DefaultBillingEvent;
import com.ning.billing.mock.BrainDeadProxyFactory;
import com.ning.billing.mock.BrainDeadProxyFactory.ZombieControl;
import com.ning.billing.util.bus.BusService;
import com.ning.billing.util.bus.DefaultBusService;
import com.ning.billing.util.callcontext.CallContext;
import com.ning.billing.util.callcontext.CallOrigin;
import com.ning.billing.util.callcontext.DefaultCallContextFactory;
import com.ning.billing.util.callcontext.UserType;
import com.ning.billing.util.clock.Clock;
import com.ning.billing.util.clock.ClockMock;
import com.ning.billing.util.globallocker.GlobalLocker;

@Guice(modules = {MockModuleNoEntitlement.class})
public class TestDefaultInvoiceMigrationApi {
	Logger log = LoggerFactory.getLogger(TestDefaultInvoiceMigrationApi.class);

	@Inject
	InvoiceUserApi invoiceUserApi;

	@Inject
	InvoicePaymentApi invoicePaymentApi;

	@Inject
	private InvoiceGenerator generator;
	@Inject
	private InvoiceDao invoiceDao;
	@Inject
	private GlobalLocker locker;

	@Inject
	private MysqlTestingHelper helper;

	@Inject
	private BusService busService;

	@Inject
	private InvoiceMigrationApi migrationApi;
	
	@Inject
	private BillingApi billingApi;



	private UUID accountId ;
	private UUID subscriptionId ;
	private DateTime date_migrated;
	private DateTime date_regular;

	private UUID migrationInvoiceId;
	private UUID regularInvoiceId;

	private static final BigDecimal MIGRATION_INVOICE_AMOUNT =  new BigDecimal("100.00");
	private static final Currency MIGRATION_INVOICE_CURRENCY =  Currency.USD;

    private final Clock clock = new ClockMock();

	@BeforeClass(groups={"slow"})
	public void setup() throws Exception
	{
		log.info("Starting set up");
		accountId = UUID.randomUUID();
		subscriptionId = UUID.randomUUID();
		date_migrated = clock.getUTCNow().minusYears(1);
		date_regular = clock.getUTCNow();

		final String invoiceDdl = IOUtils.toString(TestInvoiceDispatcher.class.getResourceAsStream("/com/ning/billing/invoice/ddl.sql"));
		final String utilDdl = IOUtils.toString(TestInvoiceDispatcher.class.getResourceAsStream("/com/ning/billing/util/ddl.sql"));

		helper.startMysql();

		helper.initDb(invoiceDdl);
		helper.initDb(utilDdl);

		busService.getBus().start();

        ((ZombieControl)billingApi).addResult("setChargedThroughDateFromTransaction", BrainDeadProxyFactory.ZOMBIE_VOID);
		migrationInvoiceId = createAndCheckMigrationInvoice();
		regularInvoiceId = generateRegularInvoice();

	}

	@AfterClass(groups={"slow"})
	public void tearDown() {
		try {
			((DefaultBusService) busService).stopBus();
			helper.stopMysql();
		} catch (Exception e) {
			log.warn("Failed to tearDown test properly ", e);
		}
	}

	private UUID createAndCheckMigrationInvoice(){
		UUID migrationInvoiceId = migrationApi.createMigrationInvoice(accountId, date_migrated, MIGRATION_INVOICE_AMOUNT, MIGRATION_INVOICE_CURRENCY);
		Assert.assertNotNull(migrationInvoiceId);
		//Double check it was created and values are correct

		Invoice invoice = invoiceDao.getById(migrationInvoiceId);
		Assert.assertNotNull(invoice);

		Assert.assertEquals(invoice.getAccountId(), accountId);
		Assert.assertEquals(invoice.getTargetDate().compareTo(date_migrated), 0); //temp to avoid tz test artifact
		//		Assert.assertEquals(invoice.getTargetDate(),now);
		Assert.assertEquals(invoice.getNumberOfItems(), 1);
		Assert.assertEquals(invoice.getInvoiceItems().get(0).getAmount().compareTo(MIGRATION_INVOICE_AMOUNT), 0 );
		Assert.assertEquals(invoice.getBalance().compareTo(MIGRATION_INVOICE_AMOUNT),0);
		Assert.assertEquals(invoice.getCurrency(), MIGRATION_INVOICE_CURRENCY);
		Assert.assertTrue(invoice.isMigrationInvoice());

		return migrationInvoiceId;
	}

	private UUID generateRegularInvoice()  throws Exception {
		AccountUserApi accountUserApi = BrainDeadProxyFactory.createBrainDeadProxyFor(AccountUserApi.class);
		Account account = BrainDeadProxyFactory.createBrainDeadProxyFor(Account.class);
		((ZombieControl)accountUserApi).addResult("getAccountById", account);
		((ZombieControl)account).addResult("getCurrency", Currency.USD);
		((ZombieControl)account).addResult("getId", accountId);

		Subscription subscription =  BrainDeadProxyFactory.createBrainDeadProxyFor(Subscription.class);
        ((ZombieControl)subscription).addResult("getId", subscriptionId);
        ((ZombieControl)subscription).addResult("getBundleId", new UUID(0L,0L));
		SortedSet<BillingEvent> events = new TreeSet<BillingEvent>();
		Plan plan = MockPlan.createBicycleNoTrialEvergreen1USD();
		PlanPhase planPhase = MockPlanPhase.create1USDMonthlyEvergreen();
		DateTime effectiveDate = new DateTime().minusDays(1);
		Currency currency = Currency.USD;
		BigDecimal fixedPrice = null;
		events.add(new DefaultBillingEvent(account, subscription, effectiveDate,plan, planPhase,
				fixedPrice, BigDecimal.ONE, currency, BillingPeriod.MONTHLY, 1,
				BillingModeType.IN_ADVANCE, "", 1L, SubscriptionTransitionType.CREATE));

		BillingApi entitlementBillingApi = BrainDeadProxyFactory.createBrainDeadProxyFor(BillingApi.class);
        ((ZombieControl)entitlementBillingApi).addResult("getBillingEventsForAccountAndUpdateAccountBCD", events);
		InvoiceDispatcher dispatcher = new InvoiceDispatcher(generator, accountUserApi, entitlementBillingApi, invoiceDao, locker, busService.getBus(), clock);

        CallContext context = new DefaultCallContextFactory(clock).createCallContext("Migration test", CallOrigin.TEST, UserType.TEST);
		Invoice invoice = dispatcher.processAccount(accountId, date_regular, true, context);
		Assert.assertNotNull(invoice);

		List<Invoice> invoices = invoiceDao.getInvoicesByAccount(accountId);
		Assert.assertEquals(invoices.size(),0);

		invoice = dispatcher.processAccount(accountId, date_regular, false, context);
		Assert.assertNotNull(invoice);

		invoices = invoiceDao.getInvoicesByAccount(accountId);
		Assert.assertEquals(invoices.size(),1);

		return invoice.getId();
	}

	// Check migration invoice is NOT returned for all user api invoice calls
	@Test(groups={"slow"},enabled=true)
	public void testUserApiAccess(){
		List<Invoice> byAccount = invoiceUserApi.getInvoicesByAccount(accountId);
		Assert.assertEquals(byAccount.size(),1);
		Assert.assertEquals(byAccount.get(0).getId(), regularInvoiceId);

		List<Invoice> byAccountAndDate = invoiceUserApi.getInvoicesByAccount(accountId, date_migrated.minusDays(1));
		Assert.assertEquals(byAccountAndDate.size(),1);
		Assert.assertEquals(byAccountAndDate.get(0).getId(), regularInvoiceId);

		Collection<Invoice> unpaid = invoiceUserApi.getUnpaidInvoicesByAccountId(accountId, date_regular.plusDays(1));
		Assert.assertEquals(unpaid.size(), 1);
		Assert.assertEquals(regularInvoiceId, unpaid.iterator().next().getId());

	}


	// Check migration invoice IS returned for payment api calls
	@Test(groups={"slow"},enabled=true)
	public void testPaymentApi(){
		List<Invoice> allByAccount = invoicePaymentApi.getAllInvoicesByAccount(accountId);
		Assert.assertEquals(allByAccount.size(),2);
		Assert.assertTrue(checkContains(allByAccount, regularInvoiceId));
		Assert.assertTrue(checkContains(allByAccount, migrationInvoiceId));
	}


	// Account balance should reflect total of migration and non-migration invoices
	@Test(groups={"slow"},enabled=true)
	public void testBalance(){
		Invoice migrationInvoice = invoiceDao.getById(migrationInvoiceId);
		Invoice regularInvoice = invoiceDao.getById(regularInvoiceId);
		BigDecimal balanceOfAllInvoices = migrationInvoice.getBalance().add(regularInvoice.getBalance());

		BigDecimal accountBalance = invoiceUserApi.getAccountBalance(accountId);
		System.out.println("Account balance: " + accountBalance + " should equal the Balance Of All Invoices: " + balanceOfAllInvoices);
		Assert.assertEquals(accountBalance.compareTo(balanceOfAllInvoices), 0);


	}

	private boolean checkContains(List<Invoice> invoices, UUID invoiceId) {
		for(Invoice invoice : invoices) {
			if(invoice.getId().equals(invoiceId)) {
				return true;
			}
		}
		return false;		
	}
}
