/*
 * Copyright 2006-2022 Dave Griffith, Bas Leijdekkers
 *
 * 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.
 */
package com.siyeh.ig.dependency;

import com.intellij.analysis.AnalysisScope;
import com.intellij.codeInspection.CommonProblemDescriptor;
import com.intellij.codeInspection.GlobalInspectionContext;
import com.intellij.codeInspection.InspectionManager;
import com.intellij.codeInspection.options.OptPane;
import com.intellij.codeInspection.reference.RefClass;
import com.intellij.codeInspection.reference.RefEntity;
import com.intellij.codeInspection.reference.RefPackage;
import com.siyeh.InspectionGadgetsBundle;
import com.siyeh.ig.BaseGlobalInspection;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Set;

import static com.intellij.codeInspection.options.OptPane.number;
import static com.intellij.codeInspection.options.OptPane.pane;

public final class ClassWithTooManyDependentsInspection extends BaseGlobalInspection {

  @SuppressWarnings("PublicField")
  public int limit = 10;

  @Override
  public CommonProblemDescriptor @Nullable [] checkElement(
    @NotNull RefEntity refEntity,
    @NotNull AnalysisScope analysisScope,
    @NotNull InspectionManager inspectionManager,
    @NotNull GlobalInspectionContext globalInspectionContext) {
    if (!(refEntity instanceof RefClass refClass)) {
      return null;
    }
    if (!(refClass.getOwner() instanceof RefPackage)) {
      return null;
    }
    final Set<RefClass> dependents = DependencyUtils.calculateDependentsForClass(refClass);
    final int numDependents = dependents.size();
    if (numDependents <= limit) {
      return null;
    }
    final String errorString =
      InspectionGadgetsBundle.message("class.with.too.many.dependents.problem.descriptor", refEntity.getName(), numDependents, limit);

    return new CommonProblemDescriptor[]{
      inspectionManager.createProblemDescriptor(errorString)
    };
  }

  @Override
  public @NotNull OptPane getOptionsPane() {
    return pane(
      number("limit", InspectionGadgetsBundle.message("class.with.too.many.dependents.max.option"), 1, 1000));
  }
}
