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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.
 */
package com.facebook.presto.tests;

import com.facebook.presto.tests.ImmutableTpchTablesRequirements.ImmutableNationTable;
import com.teradata.tempto.ProductTest;
import com.teradata.tempto.Requires;
import org.testng.annotations.Test;

import static com.facebook.presto.tests.TestGroups.ALTER_TABLE;
import static com.facebook.presto.tests.TestGroups.SMOKE;
import static com.teradata.tempto.assertions.QueryAssert.Row.row;
import static com.teradata.tempto.assertions.QueryAssert.assertThat;
import static com.teradata.tempto.query.QueryExecutor.query;
import static com.teradata.tempto.query.QueryType.UPDATE;
import static java.lang.String.format;

@Requires(ImmutableNationTable.class)
public class AlterTableTests
        extends ProductTest
{
    @Test(groups = {ALTER_TABLE, SMOKE})
    public void renameTable()
    {
        String tableName = "to_be_renamed";
        String renamedTableName = "renamed_table_name";

        query(format("DROP TABLE IF EXISTS %s", tableName));
        query(format("DROP TABLE IF EXISTS %s", renamedTableName));

        try {
            query(format("CREATE TABLE %s AS SELECT * FROM nation", tableName));

            assertThat(query(format("ALTER TABLE %s RENAME TO %s", tableName, renamedTableName), UPDATE))
                    .hasRowsCount(1);

            assertThat(query(format("SELECT * FROM %s", renamedTableName)))
                    .hasRowsCount(25);

            // rename back to original name
            assertThat(query(format("ALTER TABLE %s RENAME TO %s", renamedTableName, tableName), UPDATE))
                    .hasRowsCount(1);
        }
        finally {
            query(format("DROP TABLE %s", tableName));
        }
    }

    @Test(groups = {ALTER_TABLE, SMOKE})
    public void renameColumn()
    {
        String tableName = "tableName";
        try {
            query(format("CREATE TABLE %s AS SELECT * FROM nation", tableName));
            assertThat(query(format("ALTER TABLE %s RENAME COLUMN n_nationkey TO nationkey", tableName), UPDATE))
                    .hasRowsCount(1);
            assertThat(query(format("SELECT count(nationkey) FROM %s", tableName)))
                    .containsExactly(row(25));
            assertThat(() -> query(format("ALTER TABLE %s RENAME COLUMN nationkey TO nATIoNkEy", tableName)))
                    .failsWithMessage("Column 'nationkey' already exists");
            assertThat(() -> query(format("ALTER TABLE %s RENAME COLUMN nationkey TO n_regionkeY", tableName)))
                    .failsWithMessage("Column 'n_regionkey' already exists");

            assertThat(query(format("ALTER TABLE %s RENAME COLUMN nationkey TO n_nationkey", tableName)));
        }
        finally {
            query(format("DROP TABLE %s", tableName));
        }
    }

    @Test(groups = {ALTER_TABLE, SMOKE})
    public void addColumn()
    {
        String tableName = "tableName";
        try {
            query(format("CREATE TABLE %s AS SELECT * FROM nation", tableName));

            assertThat(query(format("SELECT count(1) FROM %s", tableName)))
                    .containsExactly(row(25));
            assertThat(query(format("ALTER TABLE %s ADD COLUMN some_new_column BIGINT", tableName)))
                    .hasRowsCount(1);
            assertThat(() -> query(format("ALTER TABLE %s ADD COLUMN n_nationkey BIGINT", tableName)))
                    .failsWithMessage("Column 'n_nationkey' already exists");
            assertThat(() -> query(format("ALTER TABLE %s ADD COLUMN n_naTioNkEy BIGINT", tableName)))
                    .failsWithMessage("Column 'n_naTioNkEy' already exists");
        }
        finally {
            query(format("DROP TABLE %s", tableName));
        }
    }
}