/*
 * 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.flink.api.java.io.jdbc;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.apache.flink.types.Row;
import org.junit.After;
import org.junit.Assert;
import org.junit.Test;

public class JDBCOutputFormatTest extends JDBCTestBase {

	private JDBCOutputFormat jdbcOutputFormat;

	@After
	public void tearDown() throws IOException {
		if (jdbcOutputFormat != null) {
			jdbcOutputFormat.close();
		}
		jdbcOutputFormat = null;
	}

	@Test(expected = IllegalArgumentException.class)
	public void testInvalidDriver() throws IOException {
		jdbcOutputFormat = JDBCOutputFormat.buildJDBCOutputFormat()
				.setDrivername("org.apache.derby.jdbc.idontexist")
				.setDBUrl(DB_URL)
				.setQuery(String.format(INSERT_TEMPLATE, INPUT_TABLE))
				.finish();
		jdbcOutputFormat.open(0, 1);
	}

	@Test(expected = IllegalArgumentException.class)
	public void testInvalidURL() throws IOException {
		jdbcOutputFormat = JDBCOutputFormat.buildJDBCOutputFormat()
				.setDrivername(DRIVER_CLASS)
				.setDBUrl("jdbc:der:iamanerror:mory:ebookshop")
				.setQuery(String.format(INSERT_TEMPLATE, INPUT_TABLE))
				.finish();
		jdbcOutputFormat.open(0, 1);
	}

	@Test(expected = IllegalArgumentException.class)
	public void testInvalidQuery() throws IOException {
		jdbcOutputFormat = JDBCOutputFormat.buildJDBCOutputFormat()
				.setDrivername(DRIVER_CLASS)
				.setDBUrl(DB_URL)
				.setQuery("iamnotsql")
				.finish();
		jdbcOutputFormat.open(0, 1);
	}

	@Test(expected = IllegalArgumentException.class)
	public void testIncompleteConfiguration() throws IOException {
		jdbcOutputFormat = JDBCOutputFormat.buildJDBCOutputFormat()
				.setDrivername(DRIVER_CLASS)
				.setQuery(String.format(INSERT_TEMPLATE, INPUT_TABLE))
				.finish();
	}


	@Test(expected = IllegalArgumentException.class)
	public void testIncompatibleTypes() throws IOException {
		jdbcOutputFormat = JDBCOutputFormat.buildJDBCOutputFormat()
				.setDrivername(DRIVER_CLASS)
				.setDBUrl(DB_URL)
				.setQuery(String.format(INSERT_TEMPLATE, INPUT_TABLE))
				.finish();
		jdbcOutputFormat.open(0, 1);

		Row row = new Row(5);
		row.setField(0, 4);
		row.setField(1, "hello");
		row.setField(2, "world");
		row.setField(3, 0.99);
		row.setField(4, "imthewrongtype");

		jdbcOutputFormat.writeRecord(row);
		jdbcOutputFormat.close();
	}

	@Test
	public void testJDBCOutputFormat() throws IOException, SQLException {
		jdbcOutputFormat = JDBCOutputFormat.buildJDBCOutputFormat()
				.setDrivername(DRIVER_CLASS)
				.setDBUrl(DB_URL)
				.setQuery(String.format(INSERT_TEMPLATE, OUTPUT_TABLE))
				.finish();
		jdbcOutputFormat.open(0, 1);

		for (JDBCTestBase.TestEntry entry : TEST_DATA) {
			Row row = new Row(5);
			row.setField(0, entry.id);
			row.setField(1, entry.title);
			row.setField(2, entry.author);
			row.setField(3, entry.price);
			row.setField(4, entry.qty);
			jdbcOutputFormat.writeRecord(row);
		}

		jdbcOutputFormat.close();

		try (
			Connection dbConn = DriverManager.getConnection(DB_URL);
			PreparedStatement statement = dbConn.prepareStatement(JDBCTestBase.SELECT_ALL_NEWBOOKS);
			ResultSet resultSet = statement.executeQuery()
		) {
			int recordCount = 0;
			while (resultSet.next()) {
				Assert.assertEquals(TEST_DATA[recordCount].id, resultSet.getObject("id"));
				Assert.assertEquals(TEST_DATA[recordCount].title, resultSet.getObject("title"));
				Assert.assertEquals(TEST_DATA[recordCount].author, resultSet.getObject("author"));
				Assert.assertEquals(TEST_DATA[recordCount].price, resultSet.getObject("price"));
				Assert.assertEquals(TEST_DATA[recordCount].qty, resultSet.getObject("qty"));

				recordCount++;
			}
			Assert.assertEquals(TEST_DATA.length, recordCount);
		}
	}
}