/*
 * 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
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package org.apache.spark.sql.execution.datasources.v2

import org.apache.iceberg.DistributionMode
import org.apache.iceberg.NullOrder
import org.apache.iceberg.SortDirection
import org.apache.iceberg.TableProperties.WRITE_DISTRIBUTION_MODE
import org.apache.iceberg.expressions.Term
import org.apache.iceberg.spark.SparkUtil
import org.apache.iceberg.spark.source.SparkTable
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.Attribute
import org.apache.spark.sql.connector.catalog.CatalogV2Implicits
import org.apache.spark.sql.connector.catalog.Identifier
import org.apache.spark.sql.connector.catalog.TableCatalog

case class SetWriteDistributionAndOrderingExec(
    catalog: TableCatalog,
    ident: Identifier,
    distributionMode: Option[DistributionMode],
    sortOrder: Seq[(Term, SortDirection, NullOrder)])
    extends LeafV2CommandExec {

  import CatalogV2Implicits._

  override lazy val output: Seq[Attribute] = Nil

  override protected def run(): Seq[InternalRow] = {
    catalog.loadTable(ident) match {
      case iceberg: SparkTable =>
        val txn = iceberg.table.newTransaction()

        val orderBuilder = txn.replaceSortOrder().caseSensitive(SparkUtil.caseSensitive(session))
        sortOrder.foreach {
          case (term, SortDirection.ASC, nullOrder) =>
            orderBuilder.asc(term, nullOrder)
          case (term, SortDirection.DESC, nullOrder) =>
            orderBuilder.desc(term, nullOrder)
        }
        orderBuilder.commit()

        distributionMode.foreach { mode =>
          txn
            .updateProperties()
            .set(WRITE_DISTRIBUTION_MODE, mode.modeName())
            .commit()
        }

        txn.commitTransaction()

      case table =>
        throw new UnsupportedOperationException(
          s"Cannot set write order of non-Iceberg table: $table")
    }

    Nil
  }

  override def simpleString(maxFields: Int): String = {
    val tableIdent = s"${catalog.name}.${ident.quoted}"
    val order = sortOrder
      .map { case (term, direction, nullOrder) =>
        s"$term $direction $nullOrder"
      }
      .mkString(", ")
    s"SetWriteDistributionAndOrdering $tableIdent $distributionMode $order"
  }
}
