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/*
 * Copyright 2014 Goldman Sachs.
 *
 * 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 com.gs.collections.impl.lazy;

import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Comparator;

import com.gs.collections.api.LazyBooleanIterable;
import com.gs.collections.api.LazyByteIterable;
import com.gs.collections.api.LazyCharIterable;
import com.gs.collections.api.LazyDoubleIterable;
import com.gs.collections.api.LazyFloatIterable;
import com.gs.collections.api.LazyIntIterable;
import com.gs.collections.api.LazyIterable;
import com.gs.collections.api.LazyLongIterable;
import com.gs.collections.api.LazyShortIterable;
import com.gs.collections.api.RichIterable;
import com.gs.collections.api.bag.MutableBag;
import com.gs.collections.api.block.function.Function;
import com.gs.collections.api.block.function.Function0;
import com.gs.collections.api.block.function.Function2;
import com.gs.collections.api.block.function.primitive.BooleanFunction;
import com.gs.collections.api.block.function.primitive.ByteFunction;
import com.gs.collections.api.block.function.primitive.CharFunction;
import com.gs.collections.api.block.function.primitive.DoubleFunction;
import com.gs.collections.api.block.function.primitive.DoubleObjectToDoubleFunction;
import com.gs.collections.api.block.function.primitive.FloatFunction;
import com.gs.collections.api.block.function.primitive.FloatObjectToFloatFunction;
import com.gs.collections.api.block.function.primitive.IntFunction;
import com.gs.collections.api.block.function.primitive.IntObjectToIntFunction;
import com.gs.collections.api.block.function.primitive.LongFunction;
import com.gs.collections.api.block.function.primitive.LongObjectToLongFunction;
import com.gs.collections.api.block.function.primitive.ShortFunction;
import com.gs.collections.api.block.predicate.Predicate;
import com.gs.collections.api.block.predicate.Predicate2;
import com.gs.collections.api.block.procedure.Procedure2;
import com.gs.collections.api.block.procedure.primitive.ObjectIntProcedure;
import com.gs.collections.api.collection.primitive.MutableBooleanCollection;
import com.gs.collections.api.collection.primitive.MutableByteCollection;
import com.gs.collections.api.collection.primitive.MutableCharCollection;
import com.gs.collections.api.collection.primitive.MutableDoubleCollection;
import com.gs.collections.api.collection.primitive.MutableFloatCollection;
import com.gs.collections.api.collection.primitive.MutableIntCollection;
import com.gs.collections.api.collection.primitive.MutableLongCollection;
import com.gs.collections.api.collection.primitive.MutableShortCollection;
import com.gs.collections.api.list.MutableList;
import com.gs.collections.api.map.MapIterable;
import com.gs.collections.api.map.MutableMap;
import com.gs.collections.api.map.sorted.MutableSortedMap;
import com.gs.collections.api.multimap.ImmutableMultimap;
import com.gs.collections.api.multimap.MutableMultimap;
import com.gs.collections.api.partition.list.PartitionMutableList;
import com.gs.collections.api.set.MutableSet;
import com.gs.collections.api.set.sorted.MutableSortedSet;
import com.gs.collections.api.stack.MutableStack;
import com.gs.collections.api.tuple.Pair;
import com.gs.collections.impl.block.factory.Comparators;
import com.gs.collections.impl.block.factory.Functions;
import com.gs.collections.impl.block.factory.Predicates;
import com.gs.collections.impl.block.factory.Procedures2;
import com.gs.collections.impl.block.procedure.CountProcedure;
import com.gs.collections.impl.block.procedure.MapCollectProcedure;
import com.gs.collections.impl.block.procedure.MutatingAggregationProcedure;
import com.gs.collections.impl.block.procedure.NonMutatingAggregationProcedure;
import com.gs.collections.impl.factory.Bags;
import com.gs.collections.impl.factory.Lists;
import com.gs.collections.impl.lazy.primitive.CollectBooleanIterable;
import com.gs.collections.impl.lazy.primitive.CollectByteIterable;
import com.gs.collections.impl.lazy.primitive.CollectCharIterable;
import com.gs.collections.impl.lazy.primitive.CollectDoubleIterable;
import com.gs.collections.impl.lazy.primitive.CollectFloatIterable;
import com.gs.collections.impl.lazy.primitive.CollectIntIterable;
import com.gs.collections.impl.lazy.primitive.CollectLongIterable;
import com.gs.collections.impl.lazy.primitive.CollectShortIterable;
import com.gs.collections.impl.map.mutable.UnifiedMap;
import com.gs.collections.impl.map.sorted.mutable.TreeSortedMap;
import com.gs.collections.impl.multimap.list.FastListMultimap;
import com.gs.collections.impl.set.mutable.UnifiedSet;
import com.gs.collections.impl.set.sorted.mutable.TreeSortedSet;
import com.gs.collections.impl.stack.mutable.ArrayStack;
import com.gs.collections.impl.utility.ArrayIterate;
import com.gs.collections.impl.utility.Iterate;
import com.gs.collections.impl.utility.LazyIterate;
import com.gs.collections.impl.utility.internal.IterableIterate;
import net.jcip.annotations.Immutable;

/**
 * AbstractLazyIterable provides a base from which deferred iterables such as SelectIterable,
 * RejectIterable and CollectIterable can be derived.
 */
@Immutable
public abstract class AbstractLazyIterable
        implements LazyIterable
{
    public LazyIterable asLazy()
    {
        return this;
    }

    public > R into(R target)
    {
        this.forEachWith(Procedures2.addToCollection(), target);
        return target;
    }

    @Override
    public String toString()
    {
        return this.makeString("[", ", ", "]");
    }

    public Object[] toArray()
    {
        return this.toList().toArray();
    }

    public  E[] toArray(E[] array)
    {
        int size = this.size();

        final E[] result = array.length < size
                ? (E[]) Array.newInstance(array.getClass().getComponentType(), size)
                : array;

        this.forEachWithIndex(new ObjectIntProcedure()
        {
            public void value(Object each, int index)
            {
                result[index] = (E) each;
            }
        });
        if (result.length > size)
        {
            result[size] = null;
        }
        return result;
    }

    public boolean contains(Object object)
    {
        return this.anySatisfy(Predicates.equal(object));
    }

    public boolean containsAllIterable(Iterable source)
    {
        return Iterate.allSatisfy(source, new Predicate()
        {
            public boolean accept(Object each)
            {
                return AbstractLazyIterable.this.contains(each);
            }
        });
    }

    public boolean containsAll(Collection source)
    {
        return this.containsAllIterable(source);
    }

    public boolean containsAllArguments(Object... elements)
    {
        return ArrayIterate.allSatisfy(elements, new Predicate()
        {
            public boolean accept(Object each)
            {
                return AbstractLazyIterable.this.contains(each);
            }
        });
    }

    public int size()
    {
        return this.count(Predicates.alwaysTrue());
    }

    public boolean isEmpty()
    {
        return IterableIterate.isEmpty(this);
    }

    public boolean notEmpty()
    {
        return IterableIterate.notEmpty(this);
    }

    public T getFirst()
    {
        return IterableIterate.getFirst(this);
    }

    public T getLast()
    {
        return IterableIterate.getLast(this);
    }

    public LazyIterable select(Predicate predicate)
    {
        return LazyIterate.select(this, predicate);
    }

    public 
 LazyIterable selectWith(Predicate2 predicate, P parameter)
    {
        return LazyIterate.select(this, Predicates.bind(predicate, parameter));
    }

    public > R select(Predicate predicate, R target)
    {
        return IterableIterate.select(this, predicate, target);
    }

    public > R selectWith(Predicate2 predicate, P parameter, R targetCollection)
    {
        return IterableIterate.selectWith(this, predicate, parameter, targetCollection);
    }

    public LazyIterable reject(Predicate predicate)
    {
        return LazyIterate.reject(this, predicate);
    }

    public 
 LazyIterable rejectWith(Predicate2 predicate, P parameter)
    {
        return LazyIterate.reject(this, Predicates.bind(predicate, parameter));
    }

    public > R reject(Predicate predicate, R target)
    {
        return IterableIterate.reject(this, predicate, target);
    }

    public > R rejectWith(Predicate2 predicate, P parameter, R targetCollection)
    {
        return IterableIterate.rejectWith(this, predicate, parameter, targetCollection);
    }

    public PartitionMutableList partition(Predicate predicate)
    {
        return IterableIterate.partition(this, predicate);
    }

    public 
 PartitionMutableList partitionWith(Predicate2 predicate, P parameter)
    {
        return IterableIterate.partitionWith(this, predicate, parameter);
    }

    public  LazyIterable selectInstancesOf(Class clazz)
    {
        return LazyIterate.selectInstancesOf(this, clazz);
    }

    public  LazyIterable collect(Function function)
    {
        return LazyIterate.collect(this, function);
    }

    public LazyBooleanIterable collectBoolean(BooleanFunction booleanFunction)
    {
        return new CollectBooleanIterable(this, booleanFunction);
    }

    public  R collectBoolean(BooleanFunction booleanFunction, R target)
    {
        return IterableIterate.collectBoolean(this, booleanFunction, target);
    }

    public LazyByteIterable collectByte(ByteFunction byteFunction)
    {
        return new CollectByteIterable(this, byteFunction);
    }

    public  R collectByte(ByteFunction byteFunction, R target)
    {
        return IterableIterate.collectByte(this, byteFunction, target);
    }

    public LazyCharIterable collectChar(CharFunction charFunction)
    {
        return new CollectCharIterable(this, charFunction);
    }

    public  R collectChar(CharFunction charFunction, R target)
    {
        return IterableIterate.collectChar(this, charFunction, target);
    }

    public LazyDoubleIterable collectDouble(DoubleFunction doubleFunction)
    {
        return new CollectDoubleIterable(this, doubleFunction);
    }

    public  R collectDouble(DoubleFunction doubleFunction, R target)
    {
        return IterableIterate.collectDouble(this, doubleFunction, target);
    }

    public LazyFloatIterable collectFloat(FloatFunction floatFunction)
    {
        return new CollectFloatIterable(this, floatFunction);
    }

    public  R collectFloat(FloatFunction floatFunction, R target)
    {
        return IterableIterate.collectFloat(this, floatFunction, target);
    }

    public LazyIntIterable collectInt(IntFunction intFunction)
    {
        return new CollectIntIterable(this, intFunction);
    }

    public  R collectInt(IntFunction intFunction, R target)
    {
        return IterableIterate.collectInt(this, intFunction, target);
    }

    public LazyLongIterable collectLong(LongFunction longFunction)
    {
        return new CollectLongIterable(this, longFunction);
    }

    public  R collectLong(LongFunction longFunction, R target)
    {
        return IterableIterate.collectLong(this, longFunction, target);
    }

    public LazyShortIterable collectShort(ShortFunction shortFunction)
    {
        return new CollectShortIterable(this, shortFunction);
    }

    public  R collectShort(ShortFunction shortFunction, R target)
    {
        return IterableIterate.collectShort(this, shortFunction, target);
    }

    public > R collect(Function function, R target)
    {
        return IterableIterate.collect(this, function, target);
    }

    public  LazyIterable collectWith(Function2 function, P parameter)
    {
        return LazyIterate.collect(this, Functions.bind(function, parameter));
    }

    public > R collectWith(Function2 function, P parameter, R targetCollection)
    {
        return IterableIterate.collectWith(this, function, parameter, targetCollection);
    }

    public  LazyIterable flatCollect(Function> function)
    {
        return LazyIterate.flatCollect(this, function);
    }

    public LazyIterable concatenate(Iterable iterable)
    {
        return LazyIterate.concatenate(this, iterable);
    }

    public > R flatCollect(Function> function, R target)
    {
        return IterableIterate.flatCollect(this, function, target);
    }

    public  LazyIterable collectIf(Predicate predicate, Function function)
    {
        return LazyIterate.collectIf(this, predicate, function);
    }

    public > R collectIf(Predicate predicate, Function function, R target)
    {
        return IterableIterate.collectIf(this, predicate, function, target);
    }

    public LazyIterable take(int count)
    {
        return LazyIterate.take(this, count);
    }

    public LazyIterable drop(int count)
    {
        return LazyIterate.drop(this, count);
    }

    public LazyIterable distinct()
    {
        return LazyIterate.distinct(this);
    }

    public T detect(Predicate predicate)
    {
        return IterableIterate.detect(this, predicate);
    }

    public 
 T detectWith(Predicate2 predicate, P parameter)
    {
        return IterableIterate.detectWith(this, predicate, parameter);
    }

    public T min(Comparator comparator)
    {
        return Iterate.min(this, comparator);
    }

    public T max(Comparator comparator)
    {
        return Iterate.max(this, comparator);
    }

    public T min()
    {
        return Iterate.min(this);
    }

    public T max()
    {
        return Iterate.max(this);
    }

    public > T minBy(Function function)
    {
        return IterableIterate.minBy(this, function);
    }

    public > T maxBy(Function function)
    {
        return IterableIterate.maxBy(this, function);
    }

    public T detectIfNone(Predicate predicate, Function0 function)
    {
        T result = this.detect(predicate);
        return result == null ? function.value() : result;
    }

    public 
 T detectWithIfNone(Predicate2 predicate, P parameter, Function0 function)
    {
        T result = this.detectWith(predicate, parameter);
        return result == null ? function.value() : result;
    }

    public int count(Predicate predicate)
    {
        CountProcedure procedure = new CountProcedure(predicate);
        this.forEach(procedure);
        return procedure.getCount();
    }

    public 
 int countWith(Predicate2 predicate, P parameter)
    {
        return IterableIterate.countWith(this, predicate, parameter);
    }

    public boolean anySatisfy(Predicate predicate)
    {
        return IterableIterate.anySatisfy(this, predicate);
    }

    public boolean allSatisfy(Predicate predicate)
    {
        return IterableIterate.allSatisfy(this, predicate);
    }

    public boolean noneSatisfy(Predicate predicate)
    {
        return IterableIterate.noneSatisfy(this, predicate);
    }

    public 
 boolean anySatisfyWith(Predicate2 predicate, P parameter)
    {
        return IterableIterate.anySatisfyWith(this, predicate, parameter);
    }

    public 
 boolean allSatisfyWith(Predicate2 predicate, P parameter)
    {
        return IterableIterate.allSatisfyWith(this, predicate, parameter);
    }

    public 
 boolean noneSatisfyWith(Predicate2 predicate, P parameter)
    {
        return IterableIterate.noneSatisfyWith(this, predicate, parameter);
    }

    public  IV injectInto(IV injectedValue, Function2 function)
    {
        return IterableIterate.injectInto(injectedValue, this, function);
    }

    public int injectInto(int injectedValue, IntObjectToIntFunction function)
    {
        return IterableIterate.injectInto(injectedValue, this, function);
    }

    public long injectInto(long injectedValue, LongObjectToLongFunction function)
    {
        return IterableIterate.injectInto(injectedValue, this, function);
    }

    public double injectInto(double injectedValue, DoubleObjectToDoubleFunction function)
    {
        return IterableIterate.injectInto(injectedValue, this, function);
    }

    public float injectInto(float injectedValue, FloatObjectToFloatFunction function)
    {
        return IterableIterate.injectInto(injectedValue, this, function);
    }

    public long sumOfInt(IntFunction function)
    {
        return IterableIterate.sumOfInt(this, function);
    }

    public double sumOfFloat(FloatFunction function)
    {
        return IterableIterate.sumOfFloat(this, function);
    }

    public long sumOfLong(LongFunction function)
    {
        return IterableIterate.sumOfLong(this, function);
    }

    public double sumOfDouble(DoubleFunction function)
    {
        return IterableIterate.sumOfDouble(this, function);
    }

    public MutableList toList()
    {
        MutableList list = Lists.mutable.of();
        this.forEachWith(Procedures2.addToCollection(), list);
        return list;
    }

    public MutableList toSortedList()
    {
        return this.toList().sortThis();
    }

    public MutableList toSortedList(Comparator comparator)
    {
        return this.toList().sortThis(comparator);
    }

    public > MutableList toSortedListBy(Function function)
    {
        return this.toSortedList(Comparators.byFunction(function));
    }

    public MutableSortedSet toSortedSet()
    {
        MutableSortedSet treeSet = TreeSortedSet.newSet();
        this.forEachWith(Procedures2.addToCollection(), treeSet);
        return treeSet;
    }

    public MutableSortedSet toSortedSet(Comparator comparator)
    {
        MutableSortedSet treeSet = TreeSortedSet.newSet(comparator);
        this.forEachWith(Procedures2.addToCollection(), treeSet);
        return treeSet;
    }

    public > MutableSortedSet toSortedSetBy(Function function)
    {
        return this.toSortedSet(Comparators.byFunction(function));
    }

    public MutableSet toSet()
    {
        MutableSet set = UnifiedSet.newSet();
        this.forEachWith(Procedures2.addToCollection(), set);
        return set;
    }

    public MutableBag toBag()
    {
        MutableBag bag = Bags.mutable.of();
        this.forEachWith(Procedures2.addToCollection(), bag);
        return bag;
    }

    public MutableStack toStack()
    {
        return ArrayStack.newStack(this);
    }

    public  MutableMap toMap(
            Function keyFunction,
            Function valueFunction)
    {
        UnifiedMap map = UnifiedMap.newMap();
        this.forEach(new MapCollectProcedure(map, keyFunction, valueFunction));
        return map;
    }

    public  MutableSortedMap toSortedMap(
            Function keyFunction,
            Function valueFunction)
    {
        TreeSortedMap sortedMap = TreeSortedMap.newMap();
        this.forEach(new MapCollectProcedure(sortedMap, keyFunction, valueFunction));
        return sortedMap;
    }

    public  MutableSortedMap toSortedMap(Comparator comparator,
            Function keyFunction,
            Function valueFunction)
    {
        TreeSortedMap sortedMap = TreeSortedMap.newMap(comparator);
        this.forEach(new MapCollectProcedure(sortedMap, keyFunction, valueFunction));
        return sortedMap;
    }

    public String makeString()
    {
        return this.makeString(", ");
    }

    public String makeString(String separator)
    {
        return this.makeString("", separator, "");
    }

    public String makeString(String start, String separator, String end)
    {
        Appendable stringBuilder = new StringBuilder();
        this.appendString(stringBuilder, start, separator, end);
        return stringBuilder.toString();
    }

    public void appendString(Appendable appendable)
    {
        this.appendString(appendable, ", ");
    }

    public void appendString(Appendable appendable, String separator)
    {
        this.appendString(appendable, "", separator, "");
    }

    public void appendString(Appendable appendable, String start, String separator, String end)
    {
        IterableIterate.appendString(this, appendable, start, separator, end);
    }

    public  ImmutableMultimap groupBy(Function function)
    {
        return IterableIterate.groupBy(this, function, FastListMultimap.newMultimap()).toImmutable();
    }

    public > R groupBy(
            Function function,
            R target)
    {
        return IterableIterate.groupBy(this, function, target);
    }

    public  ImmutableMultimap groupByEach(Function> function)
    {
        return IterableIterate.groupByEach(this, function, FastListMultimap.newMultimap()).toImmutable();
    }

    public > R groupByEach(
            Function> function,
            R target)
    {
        return IterableIterate.groupByEach(this, function, target);
    }

    public  MapIterable groupByUniqueKey(Function function)
    {
        throw new UnsupportedOperationException(this.getClass().getSimpleName() + ".groupByUniqueKey() not implemented yet");
    }

    public  LazyIterable> zip(Iterable that)
    {
        return LazyIterate.zip(this, that);
    }

    public >> R zip(Iterable that, R target)
    {
        return IterableIterate.zip(this, that, target);
    }

    public LazyIterable> zipWithIndex()
    {
        return LazyIterate.zipWithIndex(this);
    }

    public >> R zipWithIndex(R target)
    {
        return IterableIterate.zipWithIndex(this, target);
    }

    public LazyIterable> chunk(int size)
    {
        return LazyIterate.chunk(this, size);
    }

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

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















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