/*
 * Copyright (c) 2015 Pantheon Technologies s.r.o. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.model.util.type;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMap.Builder;
import java.util.HashMap;
import java.util.Map;
import javax.annotation.Nonnull;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition;
import org.opendaylight.yangtools.yang.model.api.type.BitsTypeDefinition.Bit;

public final class BitsTypeBuilder extends TypeBuilder<BitsTypeDefinition> {
    private final Builder<String, Bit> builder = ImmutableMap.builder();

    BitsTypeBuilder(final SchemaPath path) {
        super(null, path);
    }

    public BitsTypeBuilder addBit(@Nonnull final Bit item) {
        Preconditions.checkArgument(item.getPosition() != null, "Bit %s has null position", item);

        builder.put(item.getName(), item);
        return this;
    }

    @Override
    public BitsTypeDefinition build() {
        final Map<String, Bit> map = builder.build();
        final Map<Long, Bit> positionMap = new HashMap<>();

        for (Bit b : map.values()) {
            final Bit conflict = positionMap.put(b.getPosition(), b);
            if (conflict != null) {
                throw new InvalidBitDefinitionException(b, "Bit %s conflicts on position with bit ", conflict);
            }
        }

        return new BaseBitsType(getPath(), getUnknownSchemaNodes(), positionMap.values());
    }
}