/*
 * 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
 *
 *  https://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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * Apache-2.0 license and offer limited warranties, support, maintenance, and
 * commercial database integrations.
 *
 * For more information, please visit: https://www.jooq.org/legal/licensing
 *
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 *
 */
package org.jooq.impl;

// ...
import static org.jooq.SQLDialect.CLICKHOUSE;
// ...
// ...
// ...
// ...
// ...
import static org.jooq.SQLDialect.SQLITE;
// ...
// ...
import static org.jooq.impl.Keywords.K_DEFAULT;
import static org.jooq.impl.Names.N_DEFAULT;
import static org.jooq.impl.Tools.orElse;

import java.util.Set;

import org.jooq.Context;
import org.jooq.DataType;
import org.jooq.Field;
import org.jooq.SQLDialect;

/**
 * @author Lukas Eder
 */
final class Default<T> extends AbstractField<T> implements QOM.Default<T> {

    static final Set<SQLDialect> NO_SUPPORT_DEFAULT_EXPRESSION_INSERT = SQLDialect.supportedBy(SQLITE);
    static final Set<SQLDialect> NO_SUPPORT_DEFAULT_EXPRESSION_UPDATE = SQLDialect.supportedBy(CLICKHOUSE, SQLITE);

    Default(DataType<T> type) {
        super(N_DEFAULT, type);
    }

    @Override
    public final void accept(Context<?> ctx) {
        ctx.visit(K_DEFAULT);
    }

    static final Field<?> patchDefaultForInsert(Context<?> ctx, Field<?> d, Field<?> f) {
        if (NO_SUPPORT_DEFAULT_EXPRESSION_INSERT.contains(ctx.dialect()))
            return patchDefault(d, f);

        return d;
    }

    static final Field<?> patchDefaultForUpdate(Context<?> ctx, Field<?> d, Field<?> f) {
        if (NO_SUPPORT_DEFAULT_EXPRESSION_UPDATE.contains(ctx.dialect()))
            return patchDefault(d, f);

        return d;
    }

    static final Field<?> patchDefault(Field<?> d, Field<?> f) {
        if (d instanceof Default)
            return orElse(f.getDataType().default_(), () -> DSL.inline(null, f));

        return d;
    }
}
