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/*
 * The MIT License
 *
 *   Copyright (c) 2016, Mahmoud Ben Hassine ([email protected])
 *
 *   Permission is hereby granted, free of charge, to any person obtaining a copy
 *   of this software and associated documentation files (the "Software"), to deal
 *   in the Software without restriction, including without limitation the rights
 *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *   copies of the Software, and to permit persons to whom the Software is
 *   furnished to do so, subject to the following conditions:
 *
 *   The above copyright notice and this permission notice shall be included in
 *   all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *   THE SOFTWARE.
 */

package io.github.benas.randombeans.randomizers.registry;

import io.github.benas.randombeans.annotation.Priority;
import io.github.benas.randombeans.api.Randomizer;
import io.github.benas.randombeans.api.RandomizerRegistry;

import java.lang.reflect.Field;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * A {@link RandomizerRegistry} for fields annotated with {@link io.github.benas.randombeans.annotation.Randomizer}.
 *
 * @author Mahmoud Ben Hassine ([email protected])
 */
@Priority(-253)
public class AnnotationRandomizerRegistry implements RandomizerRegistry {

    private static final Logger LOGGER = Logger.getLogger(AnnotationRandomizerRegistry.class.getName());

    /**
     * Set the initial seed for all randomizers of the registry
     *
     * @param seed the initial seed
     */
    @Override
    public void setSeed(long seed) {
        // no op
    }

    /**
     * Retrieves a randomizer for the given field.
     *
     * @param field the field for which a randomizer was registered
     * @return the randomizer registered for the given field
     */
    @Override
    public Randomizer getRandomizer(Field field) {
        if (field.isAnnotationPresent(io.github.benas.randombeans.annotation.Randomizer.class)) {
            io.github.benas.randombeans.annotation.Randomizer randomizer = field.getAnnotation(io.github.benas.randombeans.annotation.Randomizer.class);
            Class type = randomizer.value();
            try {
                return (Randomizer) type.newInstance();
            } catch (Exception e) {
                LOGGER.log(Level.WARNING, "Unable to create an instance of " + type.getName(), e);
            }
        }
        return null;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Randomizer getRandomizer(Class clazz) {
        return null;
    }
}