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.context.symbol.MethodSymbol;
  import com.github._1c_syntax.bsl.languageserver.context.symbol.ParameterDefinition;
  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.BSLParserRuleContext;
  import org.antlr.v4.runtime.tree.ParseTree;
  import org.apache.commons.collections4.map.CaseInsensitiveMap;
  
  import java.util.Collection;
  import java.util.List;
  import java.util.Objects;
  import java.util.stream.Collectors;
  
  @DiagnosticMetadata(
    type = DiagnosticType.CODE_SMELL,
    severity = DiagnosticSeverity.MAJOR,
    minutesToFix = 10,
    activatedByDefault = false,
    tags = {
      DiagnosticTag.DESIGN
    }
  )
  public class FunctionOutParameterDiagnostic extends AbstractVisitorDiagnostic {
  
    @Override
    public ParseTree visitFunction(BSLParser.FunctionContext ctx) {
  
      List<ParameterDefinition> parameters = documentContext
        .getSymbolTree()
        .getMethodSymbol(ctx.getParent())
        .stream()
        .map(MethodSymbol::getParameters)
        .flatMap(Collection::stream)
        .filter(param -> !param.isByValue())
        .toList();
  
      if (parameters.isEmpty()) {
        return ctx;
      }
  
      var lvalues = Trees.findAllRuleNodes(ctx.subCodeBlock(), BSLParser.RULE_lValue)
        .stream()
        .collect(
          Collectors.toMap(
            ParseTree::getText,
            BSLParserRuleContext.class::cast,
            (existing, replacement) -> existing,
            CaseInsensitiveMap::new)
        );
  
      parameters.
        stream()
        .filter(param -> lvalues.containsKey(param.getName()))
        .map(param -> lvalues.get(param.getName()))
        .filter(Objects::nonNull)
        .forEach(diagnosticStorage::addDiagnostic);
  
      return ctx;
    }
  }
  