/*
 * 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.paimon.spark.execution

import org.apache.paimon.spark.SparkTable
import org.apache.paimon.spark.leafnode.PaimonLeafV2CommandExec
import org.apache.paimon.table.FileStoreTable

import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.Attribute
import org.apache.spark.sql.connector.catalog.{Identifier, TableCatalog}

case class DeleteTagExec(
    catalog: TableCatalog,
    ident: Identifier,
    tagStr: String,
    ifExists: Boolean)
  extends PaimonLeafV2CommandExec {

  private val DELIMITER = ","

  override protected def run(): Seq[InternalRow] = {
    val table = catalog.loadTable(ident)
    assert(table.isInstanceOf[SparkTable])

    table.asInstanceOf[SparkTable].getTable match {
      case paimonTable: FileStoreTable =>
        val tagNames = tagStr.split(DELIMITER).map(_.trim)
        for (tagName <- tagNames) {
          val tagIsExists = paimonTable.tagManager().tagExists(tagName)
          if (tagIsExists || !ifExists) {
            paimonTable.deleteTag(tagName)
          }
        }
      case t =>
        throw new UnsupportedOperationException(
          s"Can not delete tag for non-paimon FileStoreTable: $t")
    }
    Nil
  }

  override def output: Seq[Attribute] = Nil
}
