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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
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 *
 */

package org.jooq.meta.jdbc;

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

import org.jooq.Catalog;
import org.jooq.DSLContext;
import org.jooq.Field;
import org.jooq.Schema;
import org.jooq.Sequence;
import org.jooq.Table;
import org.jooq.UniqueKey;
import org.jooq.impl.DSL;
import org.jooq.meta.AbstractDatabase;
import org.jooq.meta.ArrayDefinition;
import org.jooq.meta.CatalogDefinition;
import org.jooq.meta.DataTypeDefinition;
import org.jooq.meta.DefaultDataTypeDefinition;
import org.jooq.meta.DefaultRelations;
import org.jooq.meta.DefaultSequenceDefinition;
import org.jooq.meta.DomainDefinition;
import org.jooq.meta.EnumDefinition;
import org.jooq.meta.PackageDefinition;
import org.jooq.meta.RoutineDefinition;
import org.jooq.meta.SchemaDefinition;
import org.jooq.meta.SequenceDefinition;
import org.jooq.meta.TableDefinition;
import org.jooq.meta.UDTDefinition;

/**
 * The JDBC database
 *
 * @author Lukas Eder
 */
public class JDBCDatabase extends AbstractDatabase {

    private List catalogs;
    private List  schemas;

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

    @Override
    protected void loadPrimaryKeys(DefaultRelations relations) throws SQLException {
    }

    @Override
    protected void loadUniqueKeys(DefaultRelations relations) throws SQLException {
        for (Schema schema : getSchemasFromMeta()) {
            SchemaDefinition s = getSchema(schema.getName());

            if (s != null) {
                for (Table table : schema.getTables()) {
                    TableDefinition t = getTable(s, table.getName());

                    if (t != null) {
                        UniqueKey key = table.getPrimaryKey();

                        if (key != null)
                            for (Field field : key.getFields())
                                relations.addPrimaryKey("PK_" + key.getTable().getName(), t, t.getColumn(field.getName()));
                    }
                }
            }
        }
    }

    @Override
    protected void loadForeignKeys(DefaultRelations relations) throws SQLException {
    }

    @Override
    protected void loadCheckConstraints(DefaultRelations r) throws SQLException {
    }

    @Override
    protected List getCatalogs0() throws SQLException {
        List result = new ArrayList<>();

        for (Catalog catalog : getCatalogsFromMeta())
            result.add(new CatalogDefinition(this, catalog.getName(), ""));

        return result;
    }

    private List getCatalogsFromMeta() {
        if (catalogs == null) {
            catalogs = new ArrayList<>();

            for (Catalog catalog : create().meta().getCatalogs())
                catalogs.add(catalog);
        }

        return catalogs;
    }

    @Override
    protected List getSchemata0() throws SQLException {
        List result = new ArrayList<>();

        for (Schema schema : getSchemasFromMeta()) {
            if (schema.getCatalog() != null) {
                if (getCatalog(schema.getCatalog().getName()) != null) {
                    result.add(new SchemaDefinition(this, schema.getName(), "", getCatalog(schema.getCatalog().getName())));
                }
            }
            else
                result.add(new SchemaDefinition(this, schema.getName(), ""));
        }


        return result;
    }

    private List getSchemasFromMeta() {
        if (schemas == null) {
            schemas = new ArrayList<>();

            for (Schema schema : create().meta().getSchemas())
                schemas.add(schema);
        }

        return schemas;
    }

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

        for (Schema schema : getSchemasFromMeta()) {
            for (Sequence sequence : schema.getSequences()) {
                SchemaDefinition sd = getSchema(schema.getName());

                DataTypeDefinition type = new DefaultDataTypeDefinition(
                    this,
                    sd,
                    sequence.getDataType().getTypeName()
                );

                result.add(new DefaultSequenceDefinition(
                    sd, sequence.getName(), type));
            }
        }

        return result;
    }

    @Override
    protected List getTables0() throws SQLException {
        List result = new ArrayList<>();

        for (Schema schema : getSchemasFromMeta()) {
            SchemaDefinition sd = getSchema(schema.getName());

            if (sd != null)
                for (Table table : schema.getTables())
                    result.add(new JDBCTableDefinition(sd, table));
        }

        return result;
    }

    @Override
    protected List getEnums0() throws SQLException {
        List result = new ArrayList<>();
        return result;
    }

    @Override
    protected List getDomains0() throws SQLException {
        List result = new ArrayList<>();
        return result;
    }

    @Override
    protected List getUDTs0() throws SQLException {
        List result = new ArrayList<>();
        return result;
    }

    @Override
    protected List getArrays0() throws SQLException {
        List result = new ArrayList<>();
        return result;
    }

    @Override
    protected List getRoutines0() throws SQLException {
        List result = new ArrayList<>();
        return result;
    }

    @Override
    protected List getPackages0() throws SQLException {
        List result = new ArrayList<>();
        return result;
    }
}