/*
 * 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.spark.sql.catalyst.parser.extensions

import org.apache.paimon.spark.catalog.SupportView
import org.apache.paimon.spark.catalyst.plans.logical.{CreatePaimonView, DropPaimonView, ResolvedIdentifier, ShowPaimonViews}

import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.catalyst.analysis.{CTESubstitution, ResolvedNamespace, UnresolvedView}
import org.apache.spark.sql.catalyst.plans.logical._
import org.apache.spark.sql.catalyst.rules.Rule
import org.apache.spark.sql.connector.catalog.{CatalogManager, LookupCatalog}

case class RewritePaimonViewCommands(spark: SparkSession)
  extends Rule[LogicalPlan]
  with LookupCatalog {

  protected lazy val catalogManager: CatalogManager = spark.sessionState.catalogManager

  override def apply(plan: LogicalPlan): LogicalPlan = plan.resolveOperatorsUp {

    case CreateViewStatement(
          ResolvedIdent(resolved),
          userSpecifiedColumns,
          comment,
          properties,
          Some(originalText),
          child,
          allowExisting,
          replace,
          _) =>
      CreatePaimonView(
        child = resolved,
        queryText = originalText,
        query = CTESubstitution.apply(child),
        columnAliases = userSpecifiedColumns.map(_._1),
        columnComments = userSpecifiedColumns.map(_._2.orElse(Option.empty)),
        comment = comment,
        properties = properties,
        allowExisting = allowExisting,
        replace = replace
      )

    case DropView(ResolvedIdent(resolved), ifExists: Boolean) =>
      DropPaimonView(resolved, ifExists)

    case ShowViews(_, pattern, output) if catalogManager.currentCatalog.isInstanceOf[SupportView] =>
      ShowPaimonViews(
        ResolvedNamespace(catalogManager.currentCatalog, catalogManager.currentNamespace),
        pattern,
        output)
  }

  private object ResolvedIdent {
    def unapply(unresolved: Any): Option[ResolvedIdentifier] = unresolved match {
      case CatalogAndIdentifier(viewCatalog: SupportView, ident) =>
        Some(ResolvedIdentifier(viewCatalog, ident))
      case UnresolvedView(CatalogAndIdentifier(viewCatalog: SupportView, ident), _, _, _) =>
        Some(ResolvedIdentifier(viewCatalog, ident))
      case _ =>
        None
    }
  }
}
