* limitations under the License.
 */

package org.gradle.api.internal.tasks;

import org.gradle.api.Task;

import java.util.Set;

public interface TaskDependencyUsageTracker {
    void onTaskDependencyUsage(Set<? extends Task> taskDependencies);

    private val coupledProjectsListener: CoupledProjectsListener,
    private val problems: ProblemsListener,
    private val problemFactory: ProblemFactory
) : TaskDependencyUsageTracker {
    override fun onTaskDependencyUsage(taskDependencies: Set<Task>) {
        checkForCoupledProjects(taskDependencies)
        reportProjectIsolationProblemOnApiUsage()
    }

    private
    fun checkForCoupledProjects(taskDependencies: Set<Task>) {

    public Set<? extends Task> getDependencies(@Nullable Task task) {
        Set<? extends Task> result = getDependenciesForInternalUse(task);
        if (dependencyUsageTracker != null) {
            dependencyUsageTracker.onTaskDependencyUsage(result);
        }
        return result;
    }

    @Override
    public Set<? extends Task> getDependenciesForInternalUse(@Nullable Task task) {

        when:
        dependency.getDependenciesForInternalUse(null)
        then:
        0 * tracker.onTaskDependencyUsage(_)

        when:
        dependency.getDependencies(null)
        then:
        1 * tracker.onTaskDependencyUsage(_)
    }

    static emptySet() {
        return [] as Set
    }