content: /*
   * This file is a part of BSL Language Server.
   *
   * Copyright (c) 2018-2025
   * Alexey Sosnoviy <labotamy@gmail.com>, Nikita Fedkin <nixel2007@gmail.com> and contributors
   *
   * SPDX-License-Identifier: LGPL-3.0-or-later
   *
   * BSL Language Server is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 3.0 of the License, or (at your option) any later version.
   *
   * BSL Language Server is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with BSL Language Server.
   */
  package com.github._1c_syntax.bsl.languageserver.diagnostics;
  
  import com.github._1c_syntax.bsl.languageserver.diagnostics.metadata.DiagnosticMetadata;
  import com.github._1c_syntax.bsl.languageserver.diagnostics.metadata.DiagnosticSeverity;
  import com.github._1c_syntax.bsl.languageserver.diagnostics.metadata.DiagnosticTag;
  import com.github._1c_syntax.bsl.languageserver.diagnostics.metadata.DiagnosticType;
  import com.github._1c_syntax.bsl.languageserver.utils.Trees;
  import com.github._1c_syntax.bsl.parser.BSLParser;
  import com.github._1c_syntax.bsl.parser.BSLParser.CallStatementContext;
  import com.github._1c_syntax.bsl.parser.BSLParser.MethodCallContext;
  import com.github._1c_syntax.utils.CaseInsensitivePattern;
  import org.antlr.v4.runtime.tree.ParseTree;
  
  import java.util.Locale;
  import java.util.function.Predicate;
  import java.util.regex.Pattern;
  
  @DiagnosticMetadata(
    type = DiagnosticType.ERROR,
    severity = DiagnosticSeverity.MAJOR,
    minutesToFix = 5,
    tags = {
      DiagnosticTag.STANDARD,
      DiagnosticTag.ERROR
    }
  )
  public class DeletingCollectionItemDiagnostic extends AbstractVisitorDiagnostic {
  
    private static final Pattern DELETE_CALL_PATTERN = CaseInsensitivePattern.compile(
      "(удалить|delete)"
    );
    private static final Predicate<MethodCallContext> MATCH_METHOD_CALL_DELETE
      = e -> DELETE_CALL_PATTERN.matcher(e.methodName().getText()).matches();
  
    private static boolean namesEqual(CallStatementContext callStatement, String collectionExpression) {
  
      String callStatementText = callStatement.getText().toLowerCase(Locale.getDefault());
      String prefix = collectionExpression.toLowerCase(Locale.getDefault())
        + "."
        + callStatement.accessCall().methodCall().methodName().getText().toLowerCase(Locale.getDefault())
        + "(";
      return callStatementText.startsWith(prefix);
  
    }
  
    @Override
    public ParseTree visitForEachStatement(BSLParser.ForEachStatementContext ctx) {
  
      String collectionExpression = ctx.expression().getText();
      Trees.findAllRuleNodes(ctx.codeBlock(), BSLParser.RULE_methodCall)
        .stream()
        .filter(MethodCallContext.class::isInstance)
        .map(MethodCallContext.class::cast)
        .filter(MATCH_METHOD_CALL_DELETE)
        .map(node -> node.getParent().getParent())
        .filter(CallStatementContext.class::isInstance)
        .map(CallStatementContext.class::cast)
        .filter(callStatement -> namesEqual(callStatement, collectionExpression))
        .forEach(callStatement -> diagnosticStorage.addDiagnostic(
          callStatement, info.getMessage(collectionExpression))
        );
  
      return super.visitForEachStatement(ctx);
  
    }
  }
  