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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.paimon.flink.procedure;

import org.apache.paimon.catalog.Catalog;
import org.apache.paimon.catalog.Identifier;
import org.apache.paimon.utils.StringUtils;

import org.apache.flink.table.annotation.ArgumentHint;
import org.apache.flink.table.annotation.DataTypeHint;
import org.apache.flink.table.annotation.ProcedureHint;
import org.apache.flink.table.procedure.ProcedureContext;

/**
 * Repair procedure. Usage:
 *
 * 
 *  -- repair all databases and tables in catalog
 *  CALL sys.repair()
 *
 *  -- repair all tables in a specific database
 *  CALL sys.repair('databaseName')
 *
 *  -- repair a table
 *  CALL sys.repair('databaseName.tableName')
 * 
 */
public class RepairProcedure extends ProcedureBase {

    public static final String IDENTIFIER = "repair";

    @Override
    public String identifier() {
        return IDENTIFIER;
    }

    @ProcedureHint(
            argument = {
                @ArgumentHint(name = "table", type = @DataTypeHint("STRING"), isOptional = true)
            })
    public String[] call(ProcedureContext procedureContext, String identifier)
            throws Catalog.DatabaseNotExistException, Catalog.TableNotExistException {
        if (StringUtils.isNullOrWhitespaceOnly(identifier)) {
            catalog.repairCatalog();
            return new String[] {"Success"};
        }

        repairDatabasesOrTables(identifier);

        return new String[] {"Success"};
    }

    public void repairDatabasesOrTables(String databaseOrTables)
            throws Catalog.TableNotExistException {
        String[] databaseOrTableSplits = databaseOrTables.split(",");
        for (String split : databaseOrTableSplits) {
            String[] paths = split.split("\\.");
            switch (paths.length) {
                case 1:
                    catalog.repairDatabase(paths[0]);
                    break;
                case 2:
                    catalog.repairTable(Identifier.create(paths[0], paths[1]));
                    break;
                default:
                    throw new IllegalArgumentException(
                            String.format(
                                    "Cannot get splits from '%s' to get database and table",
                                    split));
            }
        }
    }
}