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/*
 * Copyright © 2021-present Arcade Data Ltd ([email protected])
 *
 * Licensed 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.
 *
 * SPDX-FileCopyrightText: 2021-present Arcade Data Ltd ([email protected])
 * SPDX-License-Identifier: Apache-2.0
 */
/* Generated By:JJTree: Do not edit this line. OForEachBlock.java Version 4.3 */
/* JavaCCOptions:MULTI=true,NODE_USES_PARSER=false,VISITOR=true,TRACK_TOKENS=true,NODE_PREFIX=O,NODE_EXTENDS=,NODE_FACTORY=,SUPPORT_USERTYPE_VISIBILITY_PUBLIC=true */
package com.arcadedb.query.sql.parser;

import com.arcadedb.database.Database;
import com.arcadedb.query.sql.executor.BasicCommandContext;
import com.arcadedb.query.sql.executor.CommandContext;
import com.arcadedb.query.sql.executor.ForEachExecutionPlan;
import com.arcadedb.query.sql.executor.ForEachStep;
import com.arcadedb.query.sql.executor.GlobalLetExpressionStep;
import com.arcadedb.query.sql.executor.ResultSet;
import com.arcadedb.query.sql.executor.UpdateExecutionPlan;

import java.util.*;
import java.util.concurrent.atomic.*;
import java.util.stream.*;

//import com.orientechnologies.orient.core.sql.executor.LetExpressionStep;

public class ForEachBlock extends Statement {
  protected static final AtomicInteger   FOREACH_VARIABLE_PROGR = new AtomicInteger();
  protected              Identifier      loopVariable;
  protected              Expression      loopValues;
  protected              List statements             = new ArrayList<>();

  public ForEachBlock(final int id) {
    super(id);
  }

  @Override
  public ResultSet execute(final Database db, final Object[] args, final CommandContext parentcontext, final boolean usePlanCache) {
    final BasicCommandContext context = new BasicCommandContext();
    if (parentcontext != null)
      context.setParentWithoutOverridingChild(parentcontext);

    context.setDatabase(db);
    context.setInputParameters(args);
    final UpdateExecutionPlan executionPlan = createExecutionPlan(context, false);
    executionPlan.executeInternal();
    return new LocalResultSet(executionPlan);
  }

  @Override
  public ResultSet execute(final Database db, final Map params, final CommandContext parentcontext, final boolean usePlanCache) {
    final BasicCommandContext context = new BasicCommandContext();
    if (parentcontext != null)
      context.setParentWithoutOverridingChild(parentcontext);

    context.setDatabase(db);
    context.setInputParameters(params);
    final UpdateExecutionPlan executionPlan = createExecutionPlan(context, false);
    executionPlan.executeInternal();
    return new LocalResultSet(executionPlan);
  }

  public UpdateExecutionPlan createExecutionPlan(final CommandContext context, final boolean enableProfiling) {
    ForEachExecutionPlan plan = new ForEachExecutionPlan(context);
    int nextProg = FOREACH_VARIABLE_PROGR.incrementAndGet();
    if (nextProg < 0)
      FOREACH_VARIABLE_PROGR.set(0);

    Identifier varName = new Identifier("$__ARCADEDB_FOREACH_VAR_" + nextProg);
    plan.chain(new GlobalLetExpressionStep(varName, loopValues, context, enableProfiling));
    plan.chain(new ForEachStep(loopVariable, new Expression(varName), statements, context, enableProfiling));
    return plan;
  }

  @Override
  public Statement copy() {
    final ForEachBlock result = new ForEachBlock(-1);
    result.loopVariable = loopVariable.copy();
    result.loopValues = loopValues.copy();
    result.statements = statements.stream().map(x -> x.copy()).collect(Collectors.toList());
    return result;
  }

  @Override
  public boolean equals(final Object o) {
    if (this == o)
      return true;
    if (o == null || getClass() != o.getClass())
      return false;

    final ForEachBlock that = (ForEachBlock) o;

    if (!Objects.equals(loopVariable, that.loopVariable))
      return false;
    if (!Objects.equals(loopValues, that.loopValues))
      return false;
    return Objects.equals(statements, that.statements);
  }

  @Override
  public int hashCode() {
    int result = loopVariable != null ? loopVariable.hashCode() : 0;
    result = 31 * result + (loopValues != null ? loopValues.hashCode() : 0);
    result = 31 * result + (statements != null ? statements.hashCode() : 0);
    return result;
  }

  @Override
  public void toString(final Map params, final StringBuilder builder) {
    builder.append("FOREACH (");
    loopVariable.toString(params, builder);
    builder.append(" IN ");
    loopValues.toString(params, builder);
    builder.append(") {\n");
    for (Statement stm : statements) {
      stm.toString(params, builder);
      builder.append("\n");
    }
    builder.append("}");
  }

  public boolean containsReturn() {
    for (final Statement stm : this.statements) {
      if (stm instanceof ReturnStatement) {
        return true;
      }
      if (stm instanceof ForEachBlock && ((ForEachBlock) stm).containsReturn()) {
        return true;
      }
      if (stm instanceof IfStatement && ((IfStatement) stm).containsReturn()) {
        return true;
      }
    }
    return false;
  }
}
/* JavaCC - OriginalChecksum=071053b057a38c57f3c90d28399615d0 (do not edit this line) */