/**
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package org.mifosplatform.accounting.accrual.serialization;

import static org.mifosplatform.accounting.accrual.api.AccrualAccountingConstants.LOAN_PERIODIC_REQUEST_DATA_PARAMETERS;
import static org.mifosplatform.accounting.accrual.api.AccrualAccountingConstants.PERIODIC_ACCRUAL_ACCOUNTING_RESOURCE_NAME;
import static org.mifosplatform.accounting.accrual.api.AccrualAccountingConstants.accrueTillParamName;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.joda.time.LocalDate;
import org.mifosplatform.infrastructure.core.data.ApiParameterError;
import org.mifosplatform.infrastructure.core.data.DataValidatorBuilder;
import org.mifosplatform.infrastructure.core.exception.InvalidJsonException;
import org.mifosplatform.infrastructure.core.exception.PlatformApiDataValidationException;
import org.mifosplatform.infrastructure.core.serialization.FromApiJsonDeserializer;
import org.mifosplatform.infrastructure.core.serialization.FromJsonHelper;
import org.mifosplatform.infrastructure.core.service.DateUtils;
import org.mifosplatform.portfolio.loanaccount.guarantor.command.GuarantorCommand;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.google.gson.JsonElement;
import com.google.gson.reflect.TypeToken;

/**
 * Implementation of {@link FromApiJsonDeserializer} for
 * {@link GuarantorCommand}'s.
 */
@Component
public final class AccrualAccountingDataValidator {

    private final FromJsonHelper fromApiJsonHelper;

    @Autowired
    public AccrualAccountingDataValidator(final FromJsonHelper fromApiJsonfromApiJsonHelper) {
        this.fromApiJsonHelper = fromApiJsonfromApiJsonHelper;
    }

    public void validateLoanPeriodicAccrualData(final String json) {
        if (StringUtils.isBlank(json)) { throw new InvalidJsonException(); }
        final Type typeOfMap = new TypeToken<Map<String, Object>>() {}.getType();
        this.fromApiJsonHelper.checkForUnsupportedParameters(typeOfMap, json, LOAN_PERIODIC_REQUEST_DATA_PARAMETERS);

        final JsonElement element = this.fromApiJsonHelper.parse(json);
        final List<ApiParameterError> dataValidationErrors = new ArrayList<>();
        final DataValidatorBuilder baseDataValidator = new DataValidatorBuilder(dataValidationErrors)
                .resource(PERIODIC_ACCRUAL_ACCOUNTING_RESOURCE_NAME);

        final LocalDate date = this.fromApiJsonHelper.extractLocalDateNamed(accrueTillParamName, element);
        baseDataValidator.reset().parameter(accrueTillParamName).value(date).notNull().validateDateBefore(DateUtils.getLocalDateOfTenant());

        throwExceptionIfValidationWarningsExist(dataValidationErrors);

    }

    public void throwExceptionIfValidationWarningsExist(final List<ApiParameterError> dataValidationErrors) {
        if (!dataValidationErrors.isEmpty()) { throw new PlatformApiDataValidationException(dataValidationErrors); }
    }
}