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/*
 * Copyright 2021 OmniFaces
 *
 * Licensed 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
 *
 *     https://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.omnifaces.persistence.criteria;

import java.util.Objects;

import jakarta.persistence.criteria.CriteriaBuilder;
import jakarta.persistence.criteria.Expression;
import jakarta.persistence.criteria.Predicate;

/**
 * Creates path = enum.
 *
 * @author Bauke Scholtz
 */
public final class Enumerated extends Criteria> {

    private Enumerated(Enum value) {
        super(value);
    }

    public static Enumerated value(Enum value) {
        return new Enumerated(value);
    }

    public static Enumerated parse(Object searchValue, Class> targetType) {
        return new Enumerated(parseEnum(searchValue, targetType));
    }

    @Override
    public Predicate build(Expression path, CriteriaBuilder criteriaBuilder, ParameterBuilder parameterBuilder) {
        return criteriaBuilder.equal(path, parameterBuilder.create(getValue()));
    }

    @Override
    public boolean applies(Object modelValue) {
        return modelValue != null && Objects.equals(parseEnum(modelValue, getValue().getClass()), getValue());
    }

    @SuppressWarnings("unchecked")
    private static Enum parseEnum(Object searchValue, Class targetType) throws IllegalArgumentException {
        if (searchValue instanceof Enum) {
            return (Enum) searchValue;
        }
        else if (targetType.isEnum()) {
            for (Enum enumConstant : ((Class>) targetType).getEnumConstants()) {
                if (enumConstant.name().equalsIgnoreCase(searchValue.toString())) {
                    return enumConstant;
                }
            }
        }

        throw new IllegalArgumentException(searchValue.toString());
    }

}