/*
 * 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
 *
 * 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.jdbi.v3.core.argument;

import java.lang.reflect.Type;
import java.sql.Types;
import java.util.Optional;
import java.util.function.Function;

import org.jdbi.v3.core.config.ConfigRegistry;
import org.jdbi.v3.core.enums.EnumStrategy;
import org.jdbi.v3.core.generic.GenericTypes;
import org.jdbi.v3.core.internal.EnumStrategies;
import org.jdbi.v3.core.qualifier.QualifiedType;

class EnumArgumentFactory implements QualifiedArgumentFactory {
    @Override
    @SuppressWarnings("unchecked")
    public Optional<Argument> build(QualifiedType<?> givenType, Object value, ConfigRegistry config) {
        return ifEnum(givenType.getType())
            .flatMap(clazz -> makeEnumArgument((QualifiedType<Enum>) givenType, (Enum) value, config));
    }

    @SuppressWarnings("unchecked")
    static <E extends Enum<E>> Optional<Class<?>> ifEnum(Type type) {
        return Optional.of(type)
            .map(GenericTypes::getErasedType)
            .filter(Class::isEnum)
            .map(c -> (Class<E>) c);
    }

    private static <E extends Enum<E>> Optional<Argument> makeEnumArgument(QualifiedType<E> givenType, E value, ConfigRegistry config) {
        boolean byName = EnumStrategy.BY_NAME == config.get(EnumStrategies.class).findStrategy(givenType);

        return byName
            ? byName(value, config)
            : byOrdinal(value, config);
    }

    private static <E extends Enum<E>> Optional<Argument> byName(E value, ConfigRegistry config) {
        return makeArgument(Types.VARCHAR, String.class, value, E::name, config);
    }

    private static <E extends Enum<E>> Optional<Argument> byOrdinal(E value, ConfigRegistry config) {
        return makeArgument(Types.INTEGER, Integer.class, value, E::ordinal, config);
    }

    private static <A, E extends Enum<E>> Optional<Argument> makeArgument(int nullType,
                                                                          Class<A> attributeType,
                                                                          E value,
                                                                          Function<E, A> transform,
                                                                          ConfigRegistry config) {
            if (value == null) {
                return Optional.of(new NullArgument(nullType));
            }

            return config.get(Arguments.class).findFor(attributeType, transform.apply(value));
    }
}

@@ -1392,17 +1392,17 @@
 l%3CClass%3C
-?
+E
 %3E%3E ifEnu

Tweak generic parameter