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/*
 * 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 io.trino.metadata;

import com.google.common.collect.ImmutableSet;
import io.trino.spi.catalog.CatalogName;
import io.trino.spi.catalog.CatalogProperties;
import io.trino.spi.connector.CatalogHandle;
import io.trino.spi.connector.ConnectorName;

import java.util.Map;
import java.util.Optional;
import java.util.Set;

public interface CatalogManager
{
    CatalogManager NO_CATALOGS = new CatalogManager()
    {
        @Override
        public Set getCatalogNames()
        {
            return ImmutableSet.of();
        }

        @Override
        public Optional getCatalog(CatalogName catalogName)
        {
            return Optional.empty();
        }

        @Override
        public Optional getCatalogProperties(CatalogHandle catalogHandle)
        {
            return Optional.empty();
        }

        @Override
        public Set getActiveCatalogs()
        {
            return ImmutableSet.of();
        }

        @Override
        public void createCatalog(CatalogName catalogName, ConnectorName connectorName, Map properties, boolean notExists)
        {
            throw new UnsupportedOperationException();
        }

        @Override
        public void dropCatalog(CatalogName catalogName, boolean exists)
        {
            throw new UnsupportedOperationException();
        }
    };

    Set getCatalogNames();

    Optional getCatalog(CatalogName catalogName);

    Optional getCatalogProperties(CatalogHandle catalogHandle);

    Set getActiveCatalogs();

    void createCatalog(CatalogName catalogName, ConnectorName connectorName, Map properties, boolean notExists);

    void dropCatalog(CatalogName catalogName, boolean exists);
}