/*
 * Copyright 2015 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.set.sorted.immutable;

import java.util.Comparator;
import java.util.SortedSet;

import com.gs.collections.api.factory.set.sorted.ImmutableSortedSetFactory;
import com.gs.collections.api.set.sorted.ImmutableSortedSet;
import com.gs.collections.impl.utility.Iterate;
import net.jcip.annotations.Immutable;

@Immutable
public final class ImmutableSortedSetFactoryImpl implements ImmutableSortedSetFactory
{
    public <T> ImmutableSortedSet<T> empty()
    {
        return (ImmutableSortedSet<T>) ImmutableEmptySortedSet.INSTANCE;
    }

    public <T> ImmutableSortedSet<T> empty(Comparator<? super T> comparator)
    {
        return new ImmutableEmptySortedSet<T>(comparator);
    }

    public <T> ImmutableSortedSet<T> of()
    {
        return this.empty();
    }

    public <T> ImmutableSortedSet<T> with()
    {
        return this.empty();
    }

    public <T> ImmutableSortedSet<T> of(T... items)
    {
        return this.with(items);
    }

    public <T> ImmutableSortedSet<T> with(T... items)
    {
        if (items == null || items.length == 0)
        {
            return this.of();
        }

        return ImmutableTreeSet.newSetWith(items);
    }

    public <T> ImmutableSortedSet<T> ofAll(Iterable<? extends T> items)
    {
        return this.withAll(items);
    }

    public <T> ImmutableSortedSet<T> withAll(Iterable<? extends T> items)
    {
        if (items instanceof ImmutableSortedSet<?>)
        {
            return (ImmutableSortedSet<T>) items;
        }

        return this.of((T[]) Iterate.toArray(items));
    }

    public <T> ImmutableSortedSet<T> of(Comparator<? super T> comparator)
    {
        return this.with(comparator);
    }

    public <T> ImmutableSortedSet<T> with(Comparator<? super T> comparator)
    {
        if (comparator == null)
        {
            return this.of();
        }
        return new ImmutableEmptySortedSet<T>(comparator);
    }

    public <T> ImmutableSortedSet<T> of(Comparator<? super T> comparator, T... items)
    {
        return this.with(comparator, items);
    }

    public <T> ImmutableSortedSet<T> with(Comparator<? super T> comparator, T... items)
    {
        if (items == null || items.length == 0)
        {
            return this.of(comparator);
        }

        return ImmutableTreeSet.newSetWith(comparator, items);
    }

    public <T> ImmutableSortedSet<T> ofAll(Comparator<? super T> comparator, Iterable<? extends T> items)
    {
        return this.withAll(comparator, items);
    }

    public <T> ImmutableSortedSet<T> withAll(Comparator<? super T> comparator, Iterable<? extends T> items)
    {
        return this.of(comparator, (T[]) Iterate.toArray(items));
    }

    public <T> ImmutableSortedSet<T> ofSortedSet(SortedSet<T> set)
    {
        return this.withSortedSet(set);
    }

    public <T> ImmutableSortedSet<T> withSortedSet(SortedSet<T> set)
    {
        if (set instanceof ImmutableSortedSet)
        {
            return (ImmutableSortedSet<T>) set;
        }
        if (set.isEmpty())
        {
            return this.of(set.comparator());
        }
        return ImmutableTreeSet.newSet(set);
    }
}