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/*
 * SonarQube Python Plugin
 * Copyright (C) 2011-2024 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
 *
 * This program 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 Sonar Source-Available License for more details.
 *
 * You should have received a copy of the Sonar Source-Available License
 * along with this program; if not, see https://sonarsource.com/license/ssal/
 */
package org.sonar.python.checks;

import org.sonar.check.Rule;
import org.sonar.check.RuleProperty;
import org.sonar.plugins.python.api.PythonSubscriptionCheck;
import org.sonar.plugins.python.api.tree.FunctionDef;
import org.sonar.plugins.python.api.tree.Tree;
import org.sonar.python.metrics.ComplexityVisitor;

@Rule(key = "FunctionComplexity")
public class FunctionComplexityCheck extends PythonSubscriptionCheck {
  private static final int DEFAULT_MAXIMUM_FUNCTION_COMPLEXITY_THRESHOLD = 15;
  private static final String MESSAGE = "Function has a complexity of %s which is greater than %s authorized.";

  @RuleProperty(
    key = "maximumFunctionComplexityThreshold",
    description = "The maximum authorized complexity in function",
    defaultValue = "" + DEFAULT_MAXIMUM_FUNCTION_COMPLEXITY_THRESHOLD)
  int maximumFunctionComplexityThreshold = DEFAULT_MAXIMUM_FUNCTION_COMPLEXITY_THRESHOLD;

  @Override
  public void initialize(Context context) {
    context.registerSyntaxNodeConsumer(Tree.Kind.FUNCDEF, ctx -> {
      FunctionDef funcDef = (FunctionDef) ctx.syntaxNode();
      int complexity = ComplexityVisitor.complexity(funcDef);
      if (complexity > maximumFunctionComplexityThreshold) {
        String message = String.format(MESSAGE, complexity, maximumFunctionComplexityThreshold);
        ctx.addIssue(funcDef.name(), message)
          .withCost(complexity - maximumFunctionComplexityThreshold);
      }
    });
  }
}