/*
 * 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.comet.serde

import org.apache.spark.sql.catalyst.expressions.{Attribute, KnownFloatingPointNormalized}
import org.apache.spark.sql.catalyst.optimizer.NormalizeNaNAndZero

import org.apache.comet.CometSparkSessionExtensions.withInfo
import org.apache.comet.serde.QueryPlanSerde.{exprToProtoInternal, optExprWithInfo, serializeDataType}

object CometKnownFloatingPointNormalized
    extends CometExpressionSerde[KnownFloatingPointNormalized] {

  override def getUnsupportedReasons(): Seq[String] = Seq(
    "Only supports `NormalizeNaNAndZero` child expressions")

  override def getSupportLevel(expr: KnownFloatingPointNormalized): SupportLevel = {
    expr.child match {
      case _: NormalizeNaNAndZero => Compatible()
      case _ =>
        Unsupported(
          Some(
            "KnownFloatingPointNormalized only supports NormalizeNaNAndZero child expressions"))
    }
  }

  override def convert(
      expr: KnownFloatingPointNormalized,
      inputs: Seq[Attribute],
      binding: Boolean): Option[ExprOuterClass.Expr] = {

    val wrapped = expr.child.asInstanceOf[NormalizeNaNAndZero].child

    val dataType = serializeDataType(wrapped.dataType)
    if (dataType.isEmpty) {
      withInfo(wrapped, s"Unsupported datatype ${wrapped.dataType}")
      return None
    }
    val ex = exprToProtoInternal(wrapped, inputs, binding)
    val optExpr = ex.map { child =>
      val builder = ExprOuterClass.NormalizeNaNAndZero
        .newBuilder()
        .setChild(child)
        .setDatatype(dataType.get)
      ExprOuterClass.Expr.newBuilder().setNormalizeNanAndZero(builder).build()
    }
    optExprWithInfo(optExpr, expr, wrapped)
  }
}
