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/*
 * Copyright (c) 2017 Goldman Sachs and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompany this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */

package org.eclipse.collections.impl.map.mutable;

import java.util.Iterator;
import java.util.Optional;

import org.eclipse.collections.api.RichIterable;
import org.eclipse.collections.api.bag.MutableBag;
import org.eclipse.collections.api.block.function.Function;
import org.eclipse.collections.api.block.function.Function0;
import org.eclipse.collections.api.block.function.Function2;
import org.eclipse.collections.api.block.function.primitive.DoubleFunction;
import org.eclipse.collections.api.block.function.primitive.FloatFunction;
import org.eclipse.collections.api.block.function.primitive.IntFunction;
import org.eclipse.collections.api.block.function.primitive.LongFunction;
import org.eclipse.collections.api.block.predicate.Predicate2;
import org.eclipse.collections.api.block.procedure.Procedure2;
import org.eclipse.collections.api.map.MutableMap;
import org.eclipse.collections.api.map.MutableMapIterable;
import org.eclipse.collections.api.map.primitive.MutableObjectDoubleMap;
import org.eclipse.collections.api.map.primitive.MutableObjectLongMap;
import org.eclipse.collections.api.tuple.Pair;
import org.eclipse.collections.impl.block.factory.PrimitiveFunctions;
import org.eclipse.collections.impl.block.procedure.MutatingAggregationProcedure;
import org.eclipse.collections.impl.block.procedure.NonMutatingAggregationProcedure;
import org.eclipse.collections.impl.factory.Bags;
import org.eclipse.collections.impl.map.AbstractMapIterable;
import org.eclipse.collections.impl.map.mutable.primitive.ObjectDoubleHashMap;
import org.eclipse.collections.impl.map.mutable.primitive.ObjectLongHashMap;
import org.eclipse.collections.impl.tuple.AbstractImmutableEntry;
import org.eclipse.collections.impl.utility.LazyIterate;
import org.eclipse.collections.impl.utility.MapIterate;

public abstract class AbstractMutableMapIterable extends AbstractMapIterable implements MutableMapIterable
{
    @Override
    public Iterator iterator()
    {
        return this.values().iterator();
    }

    @Override
    public V getIfAbsentPut(K key, Function0 function)
    {
        V result = this.get(key);
        if (this.isAbsent(result, key))
        {
            result = function.value();
            this.put(key, result);
        }
        return result;
    }

    @Override
    public V getIfAbsentPut(K key, V value)
    {
        V result = this.get(key);
        if (this.isAbsent(result, key))
        {
            result = value;
            this.put(key, result);
        }
        return result;
    }

    @Override
    public V getIfAbsentPutWithKey(K key, Function function)
    {
        return this.getIfAbsentPutWith(key, function, key);
    }

    @Override
    public  V getIfAbsentPutWith(K key, Function function, P parameter)
    {
        V result = this.get(key);
        if (this.isAbsent(result, key))
        {
            result = function.valueOf(parameter);
            this.put(key, result);
        }
        return result;
    }

    @Override
    public V updateValue(K key, Function0 factory, Function function)
    {
        V oldValue = this.getIfAbsent(key, factory);
        V newValue = function.valueOf(oldValue);
        this.put(key, newValue);
        return newValue;
    }

    @Override
    public  V updateValueWith(K key, Function0 factory, Function2 function, P parameter)
    {
        V oldValue = this.getIfAbsent(key, factory);
        V newValue = function.value(oldValue, parameter);
        this.put(key, newValue);
        return newValue;
    }

    @Override
    public  MutableMapIterable groupByUniqueKey(Function function)
    {
        return this.groupByUniqueKey(function, UnifiedMap.newMap());
    }

    @Override
    public  MutableMap aggregateInPlaceBy(
            Function groupBy,
            Function0 zeroValueFactory,
            Procedure2 mutatingAggregator)
    {
        MutableMap map = UnifiedMap.newMap();
        this.forEach(new MutatingAggregationProcedure<>(map, groupBy, zeroValueFactory, mutatingAggregator));
        return map;
    }

    @Override
    public  MutableMap aggregateBy(
            Function groupBy,
            Function0 zeroValueFactory,
            Function2 nonMutatingAggregator)
    {
        MutableMap map = UnifiedMap.newMap();
        this.forEach(new NonMutatingAggregationProcedure<>(map, groupBy, zeroValueFactory, nonMutatingAggregator));
        return map;
    }

    @Override
    public RichIterable keysView()
    {
        return LazyIterate.adapt(this.keySet());
    }

    @Override
    public RichIterable valuesView()
    {
        return LazyIterate.adapt(this.values());
    }

    @Override
    public RichIterable> keyValuesView()
    {
        return LazyIterate.adapt(this.entrySet()).collect(AbstractImmutableEntry.getPairFunction());
    }

    @Override
    public  MutableMap collect(Function2> function)
    {
        return MapIterate.collect(this, function, UnifiedMap.newMap(this.size()));
    }

    @Override
    public MutableMap flipUniqueValues()
    {
        return MapIterate.flipUniqueValues(this);
    }

    @Override
    public Pair detect(Predicate2 predicate)
    {
        return MapIterate.detect(this, predicate);
    }

    @Override
    public Optional> detectOptional(Predicate2 predicate)
    {
        return MapIterate.detectOptional(this, predicate);
    }

    @Override
    public  MutableObjectLongMap sumByInt(Function groupBy, IntFunction function)
    {
        MutableObjectLongMap result = ObjectLongHashMap.newMap();
        return this.injectInto(result, PrimitiveFunctions.sumByIntFunction(groupBy, function));
    }

    @Override
    public  MutableObjectDoubleMap sumByFloat(Function groupBy, FloatFunction function)
    {
        MutableObjectDoubleMap result = ObjectDoubleHashMap.newMap();
        return this.injectInto(result, PrimitiveFunctions.sumByFloatFunction(groupBy, function));
    }

    @Override
    public  MutableObjectLongMap sumByLong(Function groupBy, LongFunction function)
    {
        MutableObjectLongMap result = ObjectLongHashMap.newMap();
        return this.injectInto(result, PrimitiveFunctions.sumByLongFunction(groupBy, function));
    }

    @Override
    public  MutableObjectDoubleMap sumByDouble(Function groupBy, DoubleFunction function)
    {
        MutableObjectDoubleMap result = ObjectDoubleHashMap.newMap();
        return this.injectInto(result, PrimitiveFunctions.sumByDoubleFunction(groupBy, function));
    }

    /**
     * @since 9.0
     */
    @Override
    public  MutableBag countBy(Function function)
    {
        return this.collect(function, Bags.mutable.empty());
    }

    /**
     * @since 9.0
     */
    @Override
    public  MutableBag countByWith(Function2 function, P parameter)
    {
        return this.collectWith(function, parameter, Bags.mutable.empty());
    }
}