/*
 * Copyright (C) Red Gate Software Ltd 2010-2021
 *
 * 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 org.flywaydb.core.internal.database.postgresql;

import org.flywaydb.core.api.configuration.Configuration;
import org.flywaydb.core.internal.database.base.Database;
import org.flywaydb.core.internal.database.base.Table;
import org.flywaydb.core.internal.jdbc.JdbcConnectionFactory;
import org.flywaydb.core.internal.jdbc.StatementInterceptor;
import org.flywaydb.core.internal.util.StringUtils;

import java.sql.Connection;
import java.sql.SQLException;

public class PostgreSQLDatabase extends Database<PostgreSQLConnection> {
    public PostgreSQLDatabase(Configuration configuration, JdbcConnectionFactory jdbcConnectionFactory, StatementInterceptor statementInterceptor) {
        super(configuration, jdbcConnectionFactory, statementInterceptor);
    }

    @Override
    protected PostgreSQLConnection doGetConnection(Connection connection) {
        return new PostgreSQLConnection(this, connection);
    }



















    @Override
    public void ensureSupported() {
        ensureDatabaseIsRecentEnough("9.0");

        ensureDatabaseNotOlderThanOtherwiseRecommendUpgradeToFlywayEdition("10", org.flywaydb.core.internal.license.Edition.ENTERPRISE);

        recommendFlywayUpgradeIfNecessaryForMajorVersion("13");
    }

    @Override
    public String getRawCreateScript(Table table, boolean baseline) {
        String tablespace = configuration.getTablespace() == null
                ? ""
                : " TABLESPACE \"" + configuration.getTablespace() + "\"";

        return "CREATE TABLE " + table + " (\n" +
                "    \"installed_rank\" INT NOT NULL,\n" +
                "    \"version\" VARCHAR(50),\n" +
                "    \"description\" VARCHAR(200) NOT NULL,\n" +
                "    \"type\" VARCHAR(20) NOT NULL,\n" +
                "    \"script\" VARCHAR(1000) NOT NULL,\n" +
                "    \"checksum\" INTEGER,\n" +
                "    \"installed_by\" VARCHAR(100) NOT NULL,\n" +
                "    \"installed_on\" TIMESTAMP NOT NULL DEFAULT now(),\n" +
                "    \"execution_time\" INTEGER NOT NULL,\n" +
                "    \"success\" BOOLEAN NOT NULL\n" +
                ")" + tablespace + ";\n" +
                (baseline ? getBaselineStatement(table) + ";\n" : "") +
                "ALTER TABLE " + table + " ADD CONSTRAINT \"" + table.getName() + "_pk\" PRIMARY KEY (\"installed_rank\");\n" +
                "CREATE INDEX \"" + table.getName() + "_s_idx\" ON " + table + " (\"success\");";
    }

    @Override
    protected String doGetCurrentUser() throws SQLException {
        return getMainConnection().getJdbcTemplate().queryForString("SELECT current_user");
    }

    @Override
    public boolean supportsDdlTransactions() {
        return true;
    }

    @Override
    public boolean supportsChangingCurrentSchema() {
        return true;
    }

    @Override
    public String getBooleanTrue() {
        return "TRUE";
    }

    @Override
    public String getBooleanFalse() {
        return "FALSE";
    }

    @Override
    public String doQuote(String identifier) {
        return pgQuote(identifier);
    }

    static String pgQuote(String identifier) {
        return "\"" + StringUtils.replaceAll(identifier, "\"", "\"\"") + "\"";
    }

    @Override
    public boolean catalogIsSchema() {
        return false;
    }

    @Override
    public boolean useSingleConnection() {
        return true;
    }

    /**
     * This exists to fix this issue: https://github.com/flyway/flyway/issues/2638
     * See https://www.pgpool.net/docs/latest/en/html/runtime-config-load-balancing.html
     */
    @Override
    public String getSelectStatement(Table table) {
        return "/*NO LOAD BALANCE*/\n"
                + "SELECT " + quote("installed_rank")
                + "," + quote("version")
                + "," + quote("description")
                + "," + quote("type")
                + "," + quote("script")
                + "," + quote("checksum")
                + "," + quote("installed_on")
                + "," + quote("installed_by")
                + "," + quote("execution_time")
                + "," + quote("success")
                + " FROM " + table
                + " WHERE " + quote("installed_rank") + " > ?"
                + " ORDER BY " + quote("installed_rank");
    }
}
@@ -1845,17 +1845,17 @@
 rsion(%221
-3
+4
 %22);%0A    

Fix #3313: Add support for PostgreSQL 14