/*
 * 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.kylin.engine.spark.utils

import org.apache.spark.internal.Logging
import scala.reflect.ClassTag


object LogUtils {
  def jsonArray[T, U: ClassTag](seq: Seq[T])(f: T => U ) : String = {
    implicitly[ClassTag[U]].runtimeClass match {
      case _ : Class[String] =>
        seq.map(f).map("\"" + _ + "\"").mkString("[", ",", "]")
      case _ =>
        seq.map(f).mkString("[", ",", "]")
    }
  }
  def jsonMap[A, B](map: Map[A, B]) : String = {
    map.map { kv =>
      s""""${kv._1}":"${kv._2}""""
    }.mkString("{", ",", "}")
  }
}

trait LogEx extends  Logging {

  protected def logTime[U](action: String, debug: Boolean = false)(body: => U): U = {
    val start = System.currentTimeMillis()
    val result = body
    val end = System.currentTimeMillis()

    // If action is quite fast, don't logging
    if  (end - start > 2 ) {
      if (debug) {
        logDebug(s"Run $action take ${end - start} ms")
      } else {
        logTrace(s"Run $action take ${end - start} ms")
      }
    }
    result
  }

  protected def logInfoIf(filter: => Boolean)(msg: => String): Unit = {
    if (filter) logInfo(msg)
  }

  protected def logWarningIf(filter: => Boolean)(msg: => String): Unit = {
    if (filter) logWarning(msg)
  }
}
