/*
 * 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.fluss.spark.read

import org.apache.fluss.config.Configuration
import org.apache.fluss.metadata.TablePath

import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.connector.read.{InputPartition, PartitionReader, PartitionReaderFactory}
import org.apache.spark.sql.util.CaseInsensitiveStringMap

/** Factory for creating partition readers to read data from Fluss. */
class FlussAppendPartitionReaderFactory(
    tablePath: TablePath,
    projection: Array[Int],
    options: CaseInsensitiveStringMap,
    flussConfig: Configuration)
  extends PartitionReaderFactory {

  override def createReader(partition: InputPartition): PartitionReader[InternalRow] = {
    val flussPartition = partition.asInstanceOf[FlussAppendInputPartition]
    new FlussAppendPartitionReader(
      tablePath,
      projection,
      flussPartition,
      flussConfig
    )
  }
}

/** Factory for creating partition readers to read primary key table data from Fluss. */
class FlussUpsertPartitionReaderFactory(
    tablePath: TablePath,
    projection: Array[Int],
    options: CaseInsensitiveStringMap,
    flussConfig: Configuration)
  extends PartitionReaderFactory {

  override def createReader(partition: InputPartition): PartitionReader[InternalRow] = {
    val upsertPartition = partition.asInstanceOf[FlussUpsertInputPartition]
    new FlussUpsertPartitionReader(
      tablePath,
      projection,
      upsertPartition,
      flussConfig
    )
  }
}
