/*
 * This file is part of LuckPerms, licensed under the MIT License.
 *
 *  Copyright (c) lucko (Luck) <luck@lucko.me>
 *  Copyright (c) contributors
 *
 *  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 me.lucko.luckperms.sponge.service.context;

import org.spongepowered.api.service.context.Context;

import java.util.AbstractSet;
import java.util.Set;

abstract class AbstractDelegatingContextSet extends AbstractSet<Context> implements DelegatingContextSet {

    @Override
    public int size() {
        return getDelegate().size();
    }

    @Override
    public boolean isEmpty() {
        return getDelegate().isEmpty();
    }

    @Override
    public boolean contains(Object o) {
        if (o instanceof Context) {
            Context context = (Context) o;
            return !context.getKey().isEmpty() && !context.getValue().isEmpty() && getDelegate().has(context);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return getDelegate().hashCode();
    }

    @Override
    public boolean equals(Object o) {
        if (o == this) {
            return true;
        }

        if (o instanceof DelegatingContextSet) {
            return getDelegate().equals(((DelegatingContextSet) o).getDelegate());
        }

        if (o instanceof Set) {
            Set<?> set = (Set<?>) o;

            try {
                return size() == set.size() && containsAll(set);
            } catch (NullPointerException | ClassCastException ignored) {
                return false;
            }
        }

        return false;
    }

}
