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package cucumber.junit;

import cucumber.runtime.CucumberException;
import cucumber.runtime.Runtime;
import cucumber.runtime.model.CucumberFeature;
import cucumber.runtime.model.CucumberScenario;
import cucumber.runtime.model.CucumberScenarioOutline;
import cucumber.runtime.model.CucumberTagStatement;
import gherkin.formatter.model.Feature;
import org.junit.runner.Description;
import org.junit.runner.notification.RunNotifier;
import org.junit.runners.ParentRunner;
import org.junit.runners.model.InitializationError;

import java.util.ArrayList;
import java.util.List;

import static cucumber.junit.DescriptionFactory.createDescription;

class FeatureRunner extends ParentRunner {
    private final List children = new ArrayList();

    private final CucumberFeature cucumberFeature;
    private final Runtime runtime;
    private final JUnitReporter jUnitReporter;
    private Description description;

    protected FeatureRunner(CucumberFeature cucumberFeature, Runtime runtime, JUnitReporter jUnitReporter) throws InitializationError {
        super(null);
        this.cucumberFeature = cucumberFeature;
        this.runtime = runtime;
        this.jUnitReporter = jUnitReporter;
        buildFeatureElementRunners();
    }

    @Override
    public String getName() {
        Feature feature = cucumberFeature.getFeature();
        return feature.getKeyword() + ": " + feature.getName();
    }

    @Override
    public Description getDescription() {
        if (description == null) {
            description = createDescription(getName(), cucumberFeature);
            for (ParentRunner child : getChildren()) {
                description.addChild(describeChild(child));
            }
        }
        return description;
    }

    @Override
    protected List getChildren() {
        return children;
    }

    @Override
    protected Description describeChild(ParentRunner child) {
        return child.getDescription();
    }

    @Override
    protected void runChild(ParentRunner child, RunNotifier notifier) {
        child.run(notifier);
    }

    @Override
    public void run(RunNotifier notifier) {
        jUnitReporter.uri(cucumberFeature.getUri());
        jUnitReporter.feature(cucumberFeature.getFeature());
        super.run(notifier);
        jUnitReporter.eof();
    }

    private void buildFeatureElementRunners() {
        for (CucumberTagStatement cucumberTagStatement : cucumberFeature.getFeatureElements()) {
            try {
                ParentRunner featureElementRunner;
                if (cucumberTagStatement instanceof CucumberScenario) {
                    featureElementRunner = new ExecutionUnitRunner(runtime, (CucumberScenario) cucumberTagStatement, jUnitReporter);
                } else {
                    featureElementRunner = new ScenarioOutlineRunner(runtime, (CucumberScenarioOutline) cucumberTagStatement, jUnitReporter);
                }
                children.add(featureElementRunner);
            } catch (InitializationError e) {
                throw new CucumberException("Failed to create scenario runner", e);
            }
        }
    }

}