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package cdm.event.common.validation;

import cdm.event.common.State;
import cdm.event.position.PositionStatusEnum;
import cdm.legaldocumentation.common.ClosedState;
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 java.util.List;

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;
import static java.util.stream.Collectors.toList;

public class StateValidator implements Validator {

	private List getComparisonResults(State o) {
		return Lists.newArrayList(
				checkCardinality("closedState", (ClosedState) o.getClosedState() != null ? 1 : 0, 0, 1), 
				checkCardinality("positionState", (PositionStatusEnum) o.getPositionState() != null ? 1 : 0, 0, 1)
			);
	}

	@Override
	public ValidationResult validate(RosettaPath path, State o) {
		String error = getComparisonResults(o)
			.stream()
			.filter(res -> !res.get())
			.map(res -> res.getError())
			.collect(joining("; "));

		if (!isNullOrEmpty(error)) {
			return failure("State", ValidationType.CARDINALITY, "State", path, "", error);
		}
		return success("State", ValidationType.CARDINALITY, "State", path, "");
	}

	@Override
	public List> getValidationResults(RosettaPath path, State o) {
		return getComparisonResults(o)
			.stream()
			.map(res -> {
				if (!isNullOrEmpty(res.getError())) {
					return failure("State", ValidationType.CARDINALITY, "State", path, "", res.getError());
				}
				return success("State", ValidationType.CARDINALITY, "State", path, "");
			})
			.collect(toList());
	}

}