/*
 * 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.kyuubi.engine.spark

import org.apache.kyuubi.WithKyuubiServer
import org.apache.kyuubi.config.KyuubiConf
import org.apache.kyuubi.config.KyuubiConf.{ENGINE_INITIALIZE_SQL, ENGINE_SESSION_INITIALIZE_SQL}
import org.apache.kyuubi.operation.JDBCTestUtils

class InitializeSQLSuite extends WithKyuubiServer with JDBCTestUtils {
  override protected val conf: KyuubiConf = {
    KyuubiConf()
      .set(ENGINE_INITIALIZE_SQL.key,
        "CREATE DATABASE IF NOT EXISTS INIT_DB;" +
          "CREATE TABLE IF NOT EXISTS INIT_DB.test(a int) USING CSV;" +
          "INSERT OVERWRITE TABLE INIT_DB.test VALUES (1);")
      .set(ENGINE_SESSION_INITIALIZE_SQL.key,
        "CREATE DATABASE IF NOT EXISTS INIT_DB;" +
          "CREATE TABLE IF NOT EXISTS INIT_DB.test(a int) USING CSV;" +
          "INSERT INTO INIT_DB.test VALUES (2);")
  }

  override def afterAll(): Unit = {
    withJdbcStatement() { statement =>
      statement.executeQuery("DROP TABLE IF EXISTS INIT_DB.test")
      statement.executeQuery("DROP DATABASE IF EXISTS INIT_DB")
    }
    super.afterAll()
  }

  test("KYUUBI-457: Support configurable initialize sql statement for engine startup") {
    withJdbcStatement() { statement =>
      val result = statement.executeQuery("SELECT * FROM INIT_DB.test WHERE a = 1")
      assert(result.next())
      assert(result.getInt(1) == 1)
      assert(!result.next())
    }
  }

  test("Support configurable initialize sql statement for engine session creation") {
    var currentSessionCnt: Long = -1
    withJdbcStatement() { statement =>
      val result = statement.executeQuery("SELECT COUNT(*) FROM INIT_DB.test WHERE a = 2")
      assert(result.next())
      currentSessionCnt = result.getLong(1)
      assert(currentSessionCnt >= 1)
      assert(!result.next())
    }
    // new session
    withJdbcStatement() { statement =>
      val result = statement.executeQuery("SELECT COUNT(*) FROM INIT_DB.test WHERE a = 2")
      assert(result.next())
      // use great than or equals to support concurrent test
      assert(result.getLong(1) >= currentSessionCnt + 1)
      assert(!result.next())
    }
  }

  override protected def jdbcUrl: String = getJdbcUrl
}
