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/*
 * Copyright 2014 Nicolas Morel
 *
 * 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.dominokit.jacksonapt.deser.array.dd;

import org.dominokit.jacksonapt.JsonDeserializationContext;
import org.dominokit.jacksonapt.JsonDeserializer;
import org.dominokit.jacksonapt.JsonDeserializerParameters;
import org.dominokit.jacksonapt.stream.JsonReader;

import java.util.List;

/**
 * Default {@link org.dominokit.jacksonapt.JsonDeserializer} implementation for 2D array.
 *
 * @author Nicolas Morel
 * @version $Id: $
 */
public class Array2dJsonDeserializer extends AbstractArray2dJsonDeserializer {

    public interface Array2dCreator {

        T[][] create(int first, int second);
    }

    /**
     * newInstance
     *
     * @param deserializer {@link org.dominokit.jacksonapt.JsonDeserializer} used to deserialize the objects inside the array.
     * @param arrayCreator {@link org.dominokit.jacksonapt.deser.array.dd.Array2dJsonDeserializer.Array2dCreator} used to create a new array
     * @param           Type of the elements inside the {@link java.util.AbstractCollection}
     * @return a new instance of {@link org.dominokit.jacksonapt.deser.array.dd.Array2dJsonDeserializer}
     */
    public static  Array2dJsonDeserializer newInstance(JsonDeserializer deserializer, Array2dCreator arrayCreator) {
        return new Array2dJsonDeserializer(deserializer, arrayCreator);
    }

    private final JsonDeserializer deserializer;

    private final Array2dCreator array2dCreator;

    /**
     * Constructor for Array2dJsonDeserializer.
     *
     * @param deserializer   {@link org.dominokit.jacksonapt.JsonDeserializer} used to deserialize the objects inside the array.
     * @param array2dCreator {@link org.dominokit.jacksonapt.deser.array.dd.Array2dJsonDeserializer.Array2dCreator} used to create a new array
     */
    protected Array2dJsonDeserializer(JsonDeserializer deserializer, Array2dCreator array2dCreator) {
        if (null == deserializer) {
            throw new IllegalArgumentException("deserializer cannot be null");
        }
        if (null == array2dCreator) {
            throw new IllegalArgumentException("Cannot deserialize an array without an array2dCreator");
        }
        this.deserializer = deserializer;
        this.array2dCreator = array2dCreator;
    }

    /** {@inheritDoc} */
    @Override
    protected T[][] doDeserialize(JsonReader reader, JsonDeserializationContext ctx, JsonDeserializerParameters params) {
        List> list = deserializeIntoList(reader, ctx, deserializer, params);

        if (list.isEmpty()) {
            return array2dCreator.create(0, 0);
        }

        List firstList = list.get(0);
        if (firstList.isEmpty()) {
            return array2dCreator.create(list.size(), 0);
        }

        T[][] array = array2dCreator.create(list.size(), firstList.size());

        int i = 0;
        for (List innerList : list) {
            array[i] = innerList.toArray(array[i]);
            i++;
        }
        return array;
    }

    /** {@inheritDoc} */
    @Override
    public void setBackReference(String referenceName, Object reference, T[][] value, JsonDeserializationContext ctx) {
        if (null != value && value.length > 0) {
            for (T[] array : value) {
                for (T val : array) {
                    deserializer.setBackReference(referenceName, reference, val, ctx);
                }
            }
        }
    }
}