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package cdm.observable.asset.validation;

import cdm.base.datetime.Period;
import cdm.base.staticdata.asset.common.IndexReferenceInformation;
import cdm.base.staticdata.asset.rates.metafields.FieldWithMetaFloatingRateIndexEnum;
import cdm.base.staticdata.asset.rates.metafields.FieldWithMetaInflationRateIndexEnum;
import cdm.observable.asset.FloatingRateOption;
import com.google.common.collect.Lists;
import com.rosetta.model.lib.expression.ComparisonResult;
import com.rosetta.model.lib.path.RosettaPath;
import com.rosetta.model.lib.validation.ValidationResult;
import com.rosetta.model.lib.validation.ValidationResult.ValidationType;
import com.rosetta.model.lib.validation.Validator;

import static com.google.common.base.Strings.isNullOrEmpty;
import static com.rosetta.model.lib.expression.ExpressionOperators.checkCardinality;
import static com.rosetta.model.lib.validation.ValidationResult.failure;
import static com.rosetta.model.lib.validation.ValidationResult.success;
import static java.util.stream.Collectors.joining;

public class FloatingRateOptionValidator implements Validator {

	@Override
	public ValidationResult validate(RosettaPath path, FloatingRateOption o) {
		/* Casting is required to ensure types are output to ensure recompilation in Rosetta */
		String error = 
			Lists.newArrayList(
				checkCardinality("floatingRateIndex", (FieldWithMetaFloatingRateIndexEnum) o.getFloatingRateIndex() != null ? 1 : 0, 0, 1), 
				checkCardinality("inflationRateIndex", (FieldWithMetaInflationRateIndexEnum) o.getInflationRateIndex() != null ? 1 : 0, 0, 1), 
				checkCardinality("indexTenor", (Period) o.getIndexTenor() != null ? 1 : 0, 0, 1), 
				checkCardinality("indexReferenceInformation", (IndexReferenceInformation) o.getIndexReferenceInformation() != null ? 1 : 0, 0, 1)
			).stream().filter(res -> !res.get()).map(res -> res.getError()).collect(joining("; "));
		
		if (!isNullOrEmpty(error)) {
			return failure("FloatingRateOption", ValidationType.CARDINALITY, "FloatingRateOption", path, "", error);
		}
		return success("FloatingRateOption", ValidationType.CARDINALITY, "FloatingRateOption", path, "");
	}

}