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 *
 * 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.
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package org.jooq.meta.postgres;

import static org.jooq.impl.DSL.any;
import static org.jooq.impl.DSL.coalesce;
import static org.jooq.impl.DSL.count;
import static org.jooq.impl.DSL.inline;
import static org.jooq.impl.DSL.lower;
import static org.jooq.impl.DSL.name;
import static org.jooq.impl.DSL.nvl;
import static org.jooq.impl.DSL.when;
import static org.jooq.meta.postgres.information_schema.Tables.COLUMNS;
import static org.jooq.meta.postgres.pg_catalog.Tables.PG_ATTRIBUTE;
import static org.jooq.meta.postgres.pg_catalog.Tables.PG_CLASS;
import static org.jooq.meta.postgres.pg_catalog.Tables.PG_DESCRIPTION;
import static org.jooq.meta.postgres.pg_catalog.Tables.PG_NAMESPACE;
import static org.jooq.util.postgres.PostgresDSL.oid;

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

import org.jooq.Condition;
import org.jooq.Field;
import org.jooq.Record;
import org.jooq.TableOptions.TableType;
import org.jooq.meta.AbstractTableDefinition;
import org.jooq.meta.ColumnDefinition;
import org.jooq.meta.DataTypeDefinition;
import org.jooq.meta.DefaultColumnDefinition;
import org.jooq.meta.DefaultDataTypeDefinition;
import org.jooq.meta.SchemaDefinition;

Author:
Lukas Eder/**
 * @author Lukas Eder
 */
public class PostgresTableDefinition extends AbstractTableDefinition {

    public PostgresTableDefinition(SchemaDefinition schema, String name, String comment) {
        super(schema, name, comment);
    }

    public PostgresTableDefinition(SchemaDefinition schema, String name, String comment, TableType tableType, String source) {
        super(schema, name, comment, tableType, source);
    }

    @Override
    public List<ColumnDefinition> getElements0() throws SQLException {
        List<ColumnDefinition> result = new ArrayList<>();

        PostgresDatabase database = (PostgresDatabase) getDatabase();
        Field<String> dataType =
            when(COLUMNS.INTERVAL_TYPE.like(any(inline("%YEAR%"), inline("%MONTH%"))), inline("INTERVAL YEAR TO MONTH"))
            .when(COLUMNS.INTERVAL_TYPE.like(any(inline("%DAY%"), inline("%HOUR%"), inline("%MINUTE%"), inline("%SECOND%"))), inline("INTERVAL DAY TO SECOND"))
            .else_(COLUMNS.DATA_TYPE);
        Field<Integer> precision = nvl(COLUMNS.DATETIME_PRECISION, COLUMNS.NUMERIC_PRECISION);
        Field<String> serialColumnDefault = inline("nextval('%_seq'::regclass)");







        Condition isSerial = lower(COLUMNS.COLUMN_DEFAULT).like(serialColumnDefault);
        Condition isIdentity10 = COLUMNS.IS_IDENTITY.eq(inline("YES"));

        // [#9200] only use COLUMN_DEFAULT for ColumnDefinition#isIdentity() if
        // table has no column with IS_IDENTITY = 'YES'
        Condition isIdentity =
              database.is10()
            ? isIdentity10.or(count().filterWhere(isIdentity10).over().eq(inline(0)).and(isSerial))
            : isSerial;

        for (Record record : create().select(
                COLUMNS.COLUMN_NAME,
                COLUMNS.ORDINAL_POSITION,
                dataType,

                // [#8067] A more robust / sophisticated decoding might be available
                nvl(
                    COLUMNS.CHARACTER_MAXIMUM_LENGTH,
                    when(COLUMNS.UDT_NAME.eq(inline("_varchar")), PG_ATTRIBUTE.ATTTYPMOD.sub(inline(4)))).as(COLUMNS.CHARACTER_MAXIMUM_LENGTH),
                precision.as(COLUMNS.NUMERIC_PRECISION),
                COLUMNS.NUMERIC_SCALE,
                (when(isIdentity, inline("YES"))).as(COLUMNS.IS_IDENTITY),
                COLUMNS.IS_NULLABLE,
                (when(isIdentity, inline(null, String.class)).else_(COLUMNS.COLUMN_DEFAULT)).as(COLUMNS.COLUMN_DEFAULT),
                coalesce(COLUMNS.DOMAIN_SCHEMA, COLUMNS.UDT_SCHEMA).as(COLUMNS.UDT_SCHEMA),
                coalesce(COLUMNS.DOMAIN_NAME, COLUMNS.UDT_NAME).as(COLUMNS.UDT_NAME),
                PG_DESCRIPTION.DESCRIPTION)
            .from(COLUMNS)
            .join(PG_NAMESPACE)
                .on(COLUMNS.TABLE_SCHEMA.eq(PG_NAMESPACE.NSPNAME))
            .join(PG_CLASS)
                .on(PG_CLASS.RELNAME.eq(COLUMNS.TABLE_NAME))
                .and(PG_CLASS.RELNAMESPACE.eq(oid(PG_NAMESPACE)))
            .join(PG_ATTRIBUTE)
                .on(PG_ATTRIBUTE.ATTRELID.eq(oid(PG_CLASS)))
                .and(PG_ATTRIBUTE.ATTNAME.eq(COLUMNS.COLUMN_NAME))
            .leftJoin(PG_DESCRIPTION)
                .on(PG_DESCRIPTION.OBJOID.eq(oid(PG_CLASS)))
                .and(PG_DESCRIPTION.OBJSUBID.eq(COLUMNS.ORDINAL_POSITION))
            .where(COLUMNS.TABLE_SCHEMA.equal(getSchema().getName()))
            .and(COLUMNS.TABLE_NAME.equal(getName()))



            .orderBy(COLUMNS.ORDINAL_POSITION)) {

            SchemaDefinition typeSchema = null;

            String schemaName = record.get(COLUMNS.UDT_SCHEMA);
            if (schemaName != null)
                typeSchema = getDatabase().getSchema(schemaName);

            DataTypeDefinition type = new DefaultDataTypeDefinition(
                getDatabase(),
                typeSchema,
                record.get(dataType),
                record.get(COLUMNS.CHARACTER_MAXIMUM_LENGTH),
                record.get(COLUMNS.NUMERIC_PRECISION),
                record.get(COLUMNS.NUMERIC_SCALE),
                record.get(COLUMNS.IS_NULLABLE, boolean.class),
                record.get(COLUMNS.COLUMN_DEFAULT),
                name(
                    record.get(COLUMNS.UDT_SCHEMA),
                    record.get(COLUMNS.UDT_NAME)
                )
            );

            ColumnDefinition column = new DefaultColumnDefinition(
                getDatabase().getTable(getSchema(), getName()),
                record.get(COLUMNS.COLUMN_NAME),
                record.get(COLUMNS.ORDINAL_POSITION, int.class),
                type,
                record.get(COLUMNS.IS_IDENTITY, boolean.class),
                record.get(PG_DESCRIPTION.DESCRIPTION)
            );

            result.add(column);
        }

        return result;
    }
}