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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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * ASL 2.0 and offer limited warranties, support, maintenance, and commercial
 * database integrations.
 *
 * For more information, please visit: http://www.jooq.org/licenses
 *
 *
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 */

package org.jooq.meta.mariadb;

import static org.jooq.impl.DSL.field;
import static org.jooq.impl.DSL.inline;
import static org.jooq.impl.DSL.name;
import static org.jooq.impl.DSL.nullif;
import static org.jooq.impl.SQLDataType.BIGINT;
import static org.jooq.impl.SQLDataType.BOOLEAN;
import static org.jooq.meta.mysql.information_schema.Tables.TABLES;

import java.math.BigDecimal;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.jooq.DSLContext;
import org.jooq.Field;
import org.jooq.Record;
import org.jooq.Record12;
import org.jooq.ResultQuery;
import org.jooq.SQLDialect;
import org.jooq.impl.DSL;
import org.jooq.meta.DefaultDataTypeDefinition;
import org.jooq.meta.DefaultSequenceDefinition;
import org.jooq.meta.SchemaDefinition;
import org.jooq.meta.SequenceDefinition;
import org.jooq.meta.mysql.MySQLDatabase;

/**
 * @author Lukas Eder
 */
public class MariaDBDatabase extends MySQLDatabase {

    private static final long DEFAULT_SEQUENCE_MAXVALUE = Long.MAX_VALUE - 1;
    private static final long DEFAULT_SEQUENCE_CACHE = 1000L;

    @Override
    protected DSLContext create0() {
        return DSL.using(getConnection(), SQLDialect.MARIADB);
    }

    @Override
    public ResultQuery> sequences(List schemas) {

        // [#10844] [#10854] TODO We need a way to create a dynamic FROM clause in order to group the below sequences in a single one
        return null;
    }

    @Override
    protected List getSequences0() throws SQLException {
        List result = new ArrayList<>();

        for (Record record : create()
                .select(TABLES.TABLE_SCHEMA, TABLES.TABLE_NAME)
                .from(TABLES)
                .where(TABLES.TABLE_TYPE.eq("SEQUENCE"))) {

            SchemaDefinition schema = getSchema(record.get(TABLES.TABLE_SCHEMA));
            if (schema != null) {
                String name = record.get(TABLES.TABLE_NAME);

                DefaultDataTypeDefinition type = new DefaultDataTypeDefinition(
                    this,
                    schema,
                    BIGINT.getTypeName()
                );

                Field startWith = nullif(field("start_value", BIGINT), inline(1L));
                Field incrementBy = nullif(field("increment", BIGINT), inline(1L));
                Field minValue = inline(field("minimum_value", BIGINT), inline(1L));
                Field maxValue = nullif(field("maximum_value", BIGINT), inline(DEFAULT_SEQUENCE_MAXVALUE));
                Field cycle = field("cycle_option", BOOLEAN);
                Field cache = nullif(field("cache_size", BIGINT), inline(DEFAULT_SEQUENCE_CACHE));

                Record flags = create()
                    .select(startWith, incrementBy, minValue, maxValue, cycle, cache)
                    .from(name(schema.getName(), name))
                    .fetchOne();

                result.add(new DefaultSequenceDefinition(
                    schema,
                    name,
                    type,
                    null,
                    flags.get(startWith),
                    flags.get(incrementBy),
                    flags.get(minValue),
                    flags.get(maxValue),
                    flags.get(cycle),
                    flags.get(cache)
                ));
            }
        }

        return result;
    }
}