/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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 org.apache.fineract.integrationtests;

import static org.junit.jupiter.api.Assertions.assertEquals;

import io.restassured.builder.RequestSpecBuilder;
import io.restassured.builder.ResponseSpecBuilder;
import io.restassured.http.ContentType;
import io.restassured.specification.RequestSpecification;
import io.restassured.specification.ResponseSpecification;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.fineract.integrationtests.common.ClientHelper;
import org.apache.fineract.integrationtests.common.CollateralManagementHelper;
import org.apache.fineract.integrationtests.common.Utils;
import org.apache.fineract.integrationtests.common.accounting.Account;
import org.apache.fineract.integrationtests.common.loans.LoanApplicationTestBuilder;
import org.apache.fineract.integrationtests.common.loans.LoanProductTestBuilder;
import org.apache.fineract.integrationtests.common.loans.LoanStatusChecker;
import org.apache.fineract.integrationtests.common.loans.LoanTransactionHelper;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@SuppressWarnings("rawtypes")
public class LoanRepaymentRescheduleAtDisbursementTest {

    private static final Logger LOG = LoggerFactory.getLogger(LoanRepaymentRescheduleAtDisbursementTest.class);
    private ResponseSpecification responseSpec;
    private RequestSpecification requestSpec;
    private LoanTransactionHelper loanTransactionHelper;
    private LoanApplicationApprovalTest loanApplicationApprovalTest;
    private ResponseSpecification generalResponseSpec;

    @BeforeEach
    public void setup() {
        Utils.initializeRESTAssured();
        this.requestSpec = new RequestSpecBuilder().setContentType(ContentType.JSON).build();
        this.requestSpec.header("Authorization", "Basic " + Utils.loginIntoServerAndGetBase64EncodedAuthenticationKey());
        this.responseSpec = new ResponseSpecBuilder().expectStatusCode(200).build();
        this.loanTransactionHelper = new LoanTransactionHelper(this.requestSpec, this.responseSpec);
        this.loanApplicationApprovalTest = new LoanApplicationApprovalTest();
        this.generalResponseSpec = new ResponseSpecBuilder().build();
    }

    @SuppressWarnings("unchecked")
    @Test
    public void testLoanRepaymentRescheduleAtDisbursement() {

        final String approvalAmount = "10000";
        final String approveDate = "01 March 2015";
        final String expectedDisbursementDate = "01 March 2015";
        final String disbursementDate = "01 March 2015";
        final String adjustRepaymentDate = "16 March 2015";

        // CREATE CLIENT
        final Integer clientID = ClientHelper.createClient(this.requestSpec, this.responseSpec, "01 January 2014");
        LOG.info("---------------------------------CLIENT CREATED WITH ID--------------------------------------------------- {}", clientID);

        // CREATE LOAN MULTIDISBURSAL PRODUCT WITH INTEREST RECALCULATION
        final Integer loanProductID = createLoanProductWithInterestRecalculation(LoanProductTestBuilder.RBI_INDIA_STRATEGY,
                LoanProductTestBuilder.RECALCULATION_COMPOUNDING_METHOD_NONE,
                LoanProductTestBuilder.RECALCULATION_STRATEGY_REDUCE_NUMBER_OF_INSTALLMENTS,
                LoanProductTestBuilder.RECALCULATION_FREQUENCY_TYPE_DAILY, "0",
                LoanProductTestBuilder.INTEREST_APPLICABLE_STRATEGY_ON_PRE_CLOSE_DATE, null);

        // CREATE TRANCHES
        List<HashMap> createTranches = new ArrayList<>();
        createTranches.add(this.loanApplicationApprovalTest.createTrancheDetail("01 March 2015", "5000"));
        createTranches.add(this.loanApplicationApprovalTest.createTrancheDetail("01 May 2015", "5000"));

        // APPROVE TRANCHES
        List<HashMap> approveTranches = new ArrayList<>();
        approveTranches.add(this.loanApplicationApprovalTest.createTrancheDetail("01 March 2015", "5000"));
        approveTranches.add(this.loanApplicationApprovalTest.createTrancheDetail("01 May 2015", "5000"));

        List<HashMap> collaterals = new ArrayList<>();
        final Integer collateralId = CollateralManagementHelper.createCollateralProduct(this.requestSpec, this.responseSpec);
        Assertions.assertNotNull(collateralId);
        final Integer clientCollateralId = CollateralManagementHelper.createClientCollateral(this.requestSpec, this.responseSpec,
                String.valueOf(clientID), collateralId);
        Assertions.assertNotNull(clientCollateralId);
        addCollaterals(collaterals, clientCollateralId, BigDecimal.valueOf(1));

        // APPLY FOR TRANCHE LOAN WITH INTEREST RECALCULATION
        final Integer loanID = applyForLoanApplicationForInterestRecalculation(clientID, loanProductID, disbursementDate,
                LoanApplicationTestBuilder.RBI_INDIA_STRATEGY, new ArrayList<HashMap>(0), createTranches, collaterals);

        HashMap loanStatusHashMap = LoanStatusChecker.getStatusOfLoan(this.requestSpec, this.responseSpec, loanID);

        // VALIDATE THE LOAN STATUS
        LoanStatusChecker.verifyLoanIsPending(loanStatusHashMap);

        LOG.info("-----------------------------------APPROVE LOAN-----------------------------------------------------------");
        loanStatusHashMap = this.loanTransactionHelper.approveLoanWithApproveAmount(approveDate, expectedDisbursementDate, approvalAmount,
                loanID, approveTranches);

        // VALIDATE THE LOAN IS APPROVED
        LoanStatusChecker.verifyLoanIsApproved(loanStatusHashMap);
        LoanStatusChecker.verifyLoanIsWaitingForDisbursal(loanStatusHashMap);

        // DISBURSE A FIRST TRANCHE
        this.loanTransactionHelper.disburseLoanWithRepaymentReschedule(disbursementDate, loanID, adjustRepaymentDate);
        loanStatusHashMap = LoanStatusChecker.getStatusOfLoan(this.requestSpec, this.responseSpec, loanID);

        ArrayList<HashMap> loanRepaymnetSchedule = this.loanTransactionHelper.getLoanRepaymentSchedule(requestSpec, generalResponseSpec,
                loanID);
        HashMap firstInstallement = loanRepaymnetSchedule.get(1);
        Map<String, Object> expectedvalues = new HashMap<>(3);
        Calendar date = Calendar.getInstance(Utils.getTimeZoneOfTenant());
        date.set(2015, Calendar.MARCH, 16);
        expectedvalues.put("dueDate", getDateAsArray(date, 0));
        expectedvalues.put("principalDue", "834.71");
        expectedvalues.put("interestDue", "49.32");
        expectedvalues.put("feeChargesDue", "0");
        expectedvalues.put("penaltyChargesDue", "0");
        expectedvalues.put("totalDueForPeriod", "884.03");

        // VALIDATE REPAYMENT SCHEDULE
        verifyLoanRepaymentSchedule(firstInstallement, expectedvalues);

    }

    private void addCollaterals(List<HashMap> collaterals, Integer collateralId, BigDecimal quantity) {
        collaterals.add(collaterals(collateralId, quantity));
    }

    private HashMap<String, String> collaterals(Integer collateralId, BigDecimal quantity) {
        HashMap<String, String> collateral = new HashMap<String, String>(2);
        collateral.put("clientCollateralId", collateralId.toString());
        collateral.put("quantity", quantity.toString());
        return collateral;
    }

    private void verifyLoanRepaymentSchedule(final HashMap firstInstallement, final Map<String, Object> expectedvalues) {

        assertEquals(expectedvalues.get("dueDate"), firstInstallement.get("dueDate"));
        assertEquals(String.valueOf(expectedvalues.get("principalDue")), String.valueOf(firstInstallement.get("principalDue")));
        assertEquals(String.valueOf(expectedvalues.get("interestDue")), String.valueOf(firstInstallement.get("interestDue")));
        assertEquals(String.valueOf(expectedvalues.get("feeChargesDue")), String.valueOf(firstInstallement.get("feeChargesDue")));
        assertEquals(String.valueOf(expectedvalues.get("penaltyChargesDue")), String.valueOf(firstInstallement.get("penaltyChargesDue")));
        assertEquals(String.valueOf(expectedvalues.get("totalDueForPeriod")), String.valueOf(firstInstallement.get("totalDueForPeriod")));

    }

    private Integer createLoanProductWithInterestRecalculation(final String repaymentStrategy,
            final String interestRecalculationCompoundingMethod, final String rescheduleStrategyMethod,
            final String recalculationRestFrequencyType, final String recalculationRestFrequencyInterval,
            final String preCloseInterestCalculationStrategy, final Account[] accounts) {
        final String recalculationCompoundingFrequencyType = null;
        final String recalculationCompoundingFrequencyInterval = null;
        final Integer recalculationCompoundingFrequencyOnDayType = null;
        final Integer recalculationCompoundingFrequencyDayOfWeekType = null;
        final Integer recalculationRestFrequencyOnDayType = null;
        final Integer recalculationRestFrequencyDayOfWeekType = null;
        return createLoanProductWithInterestRecalculation(repaymentStrategy, interestRecalculationCompoundingMethod,
                rescheduleStrategyMethod, recalculationRestFrequencyType, recalculationRestFrequencyInterval,
                recalculationCompoundingFrequencyType, recalculationCompoundingFrequencyInterval, preCloseInterestCalculationStrategy,
                accounts, null, false, recalculationCompoundingFrequencyOnDayType, recalculationCompoundingFrequencyDayOfWeekType,
                recalculationRestFrequencyOnDayType, recalculationRestFrequencyDayOfWeekType);
    }

    private Integer createLoanProductWithInterestRecalculation(final String repaymentStrategy,
            final String interestRecalculationCompoundingMethod, final String rescheduleStrategyMethod,
            final String recalculationRestFrequencyType, final String recalculationRestFrequencyInterval,
            final String recalculationCompoundingFrequencyType, final String recalculationCompoundingFrequencyInterval,
            final String preCloseInterestCalculationStrategy, final Account[] accounts, final String chargeId,
            boolean isArrearsBasedOnOriginalSchedule, final Integer recalculationCompoundingFrequencyOnDayType,
            final Integer recalculationCompoundingFrequencyDayOfWeekType, final Integer recalculationRestFrequencyOnDayType,
            final Integer recalculationRestFrequencyDayOfWeekType) {
        LOG.info("------------------------------CREATING NEW LOAN PRODUCT ---------------------------------------");
        LoanProductTestBuilder builder = new LoanProductTestBuilder().withPrincipal("10000.00").withNumberOfRepayments("12")
                .withRepaymentAfterEvery("2").withRepaymentTypeAsWeek().withinterestRatePerPeriod("2")
                .withInterestRateFrequencyTypeAsMonths().withTranches(true).withInterestCalculationPeriodTypeAsRepaymentPeriod(true)
                .withRepaymentStrategy(repaymentStrategy).withInterestTypeAsDecliningBalance()
                .withInterestRecalculationDetails(interestRecalculationCompoundingMethod, rescheduleStrategyMethod,
                        preCloseInterestCalculationStrategy)
                .withInterestRecalculationRestFrequencyDetails(recalculationRestFrequencyType, recalculationRestFrequencyInterval,
                        recalculationRestFrequencyOnDayType, recalculationRestFrequencyDayOfWeekType)
                .withInterestRecalculationCompoundingFrequencyDetails(recalculationCompoundingFrequencyType,
                        recalculationCompoundingFrequencyInterval, recalculationCompoundingFrequencyOnDayType,
                        recalculationCompoundingFrequencyDayOfWeekType);
        if (accounts != null) {
            builder = builder.withAccountingRulePeriodicAccrual(accounts);
        }

        if (isArrearsBasedOnOriginalSchedule) {
            builder = builder.withArrearsConfiguration();
        }

        final String loanProductJSON = builder.build(chargeId);
        return this.loanTransactionHelper.getLoanProductId(loanProductJSON);
    }

    private Integer applyForLoanApplicationForInterestRecalculation(final Integer clientID, final Integer loanProductID,
            final String disbursementDate, final String repaymentStrategy, final List<HashMap> charges, List<HashMap> tranches,
            final List<HashMap> collaterals) {
        final String graceOnInterestPayment = null;
        final String graceOnPrincipalPayment = null;

        return applyForLoanApplicationForInterestRecalculation(clientID, loanProductID, disbursementDate, repaymentStrategy, charges,
                graceOnInterestPayment, graceOnPrincipalPayment, tranches, collaterals);
    }

    private Integer applyForLoanApplicationForInterestRecalculation(final Integer clientID, final Integer loanProductID,
            final String disbursementDate, final String repaymentStrategy, final List<HashMap> charges, final String graceOnInterestPayment,
            final String graceOnPrincipalPayment, List<HashMap> tranches, List<HashMap> collaterals) {
        LOG.info("--------------------------------APPLYING FOR LOAN APPLICATION--------------------------------");
        final String loanApplicationJSON = new LoanApplicationTestBuilder() //
                .withPrincipal("10000.00") //
                .withLoanTermFrequency("24") //
                .withLoanTermFrequencyAsWeeks() //
                .withNumberOfRepayments("12") //
                .withRepaymentEveryAfter("2") //
                .withRepaymentFrequencyTypeAsWeeks() //
                .withInterestRatePerPeriod("2") //
                .withAmortizationTypeAsEqualInstallments() //
                .withTranches(tranches).withFixedEmiAmount("") //
                .withInterestTypeAsDecliningBalance() //
                .withInterestCalculationPeriodTypeAsDays() //
                .withInterestCalculationPeriodTypeAsDays() //
                .withExpectedDisbursementDate(disbursementDate) //
                .withSubmittedOnDate(disbursementDate) //
                .withwithRepaymentStrategy(repaymentStrategy) //
                .withCollaterals(collaterals).withCharges(charges)//
                .build(clientID.toString(), loanProductID.toString(), null);
        return this.loanTransactionHelper.getLoanId(loanApplicationJSON);
    }

    private List getDateAsArray(Calendar date, int addPeriod) {
        return getDateAsArray(date, addPeriod, Calendar.DAY_OF_MONTH);
    }

    private List getDateAsArray(Calendar date, int addvalue, int type) {
        date.add(type, addvalue);
        return new ArrayList<>(Arrays.asList(date.get(Calendar.YEAR), date.get(Calendar.MONTH) + 1, date.get(Calendar.DAY_OF_MONTH)));
    }
}