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package cucumber.runtime;

import cucumber.api.StepDefinitionReporter;
import cucumber.runtime.xstream.LocalizedXStreams;
import gherkin.pickles.PickleStep;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

public class RuntimeGlue implements Glue {
    final Map stepDefinitionsByPattern = new TreeMap();
    final List beforeHooks = new ArrayList();
    final List afterHooks = new ArrayList();

    private final LocalizedXStreams localizedXStreams;

    public RuntimeGlue(LocalizedXStreams localizedXStreams) {
        this(null, localizedXStreams);
    }

    @Deprecated
    public RuntimeGlue(UndefinedStepsTracker tracker, LocalizedXStreams localizedXStreams) {
        this.localizedXStreams = localizedXStreams;
    }

    @Override
    public void addStepDefinition(StepDefinition stepDefinition) {
        StepDefinition previous = stepDefinitionsByPattern.get(stepDefinition.getPattern());
        if (previous != null) {
            throw new DuplicateStepDefinitionException(previous, stepDefinition);
        }
        stepDefinitionsByPattern.put(stepDefinition.getPattern(), stepDefinition);
    }

    @Override
    public void addBeforeHook(HookDefinition hookDefinition) {
        beforeHooks.add(hookDefinition);
        Collections.sort(beforeHooks, new HookComparator(true));
    }

    @Override
    public void addAfterHook(HookDefinition hookDefinition) {
        afterHooks.add(hookDefinition);
        Collections.sort(afterHooks, new HookComparator(false));
    }

    @Override
    public List getBeforeHooks() {
        return beforeHooks;
    }

    @Override
    public List getAfterHooks() {
        return afterHooks;
    }

    @Override
    public StepDefinitionMatch stepDefinitionMatch(String featurePath, PickleStep step) {
        List matches = stepDefinitionMatches(featurePath, step);
        if (matches.isEmpty()) {
            return null;
        }
        if (matches.size() == 1) {
            return matches.get(0);
        } else {
            throw new AmbiguousStepDefinitionsException(step, matches);
        }
    }

    private List stepDefinitionMatches(String featurePath, PickleStep step) {
        List result = new ArrayList();
        for (StepDefinition stepDefinition : stepDefinitionsByPattern.values()) {
            List arguments = stepDefinition.matchedArguments(step);
            if (arguments != null) {
                result.add(new StepDefinitionMatch(arguments, stepDefinition, featurePath, step, localizedXStreams));
            }
        }
        return result;
    }

    @Override
    public void reportStepDefinitions(StepDefinitionReporter stepDefinitionReporter) {
        for (StepDefinition stepDefinition : stepDefinitionsByPattern.values()) {
            stepDefinitionReporter.stepDefinition(stepDefinition);
        }
    }

    @Override
    public void removeScenarioScopedGlue() {
        removeScenarioScopedHooks(beforeHooks);
        removeScenarioScopedHooks(afterHooks);
        removeScenarioScopedStepdefs();
    }

    private void removeScenarioScopedHooks(List beforeHooks1) {
        Iterator hookIterator = beforeHooks1.iterator();
        while(hookIterator.hasNext()) {
            HookDefinition hook = hookIterator.next();
            if(hook.isScenarioScoped()) {
                hookIterator.remove();
            }
        }
    }

    private void removeScenarioScopedStepdefs() {
        Iterator> stepdefs = stepDefinitionsByPattern.entrySet().iterator();
        while(stepdefs.hasNext()) {
            StepDefinition stepDefinition = stepdefs.next().getValue();
            if(stepDefinition.isScenarioScoped()) {
                stepdefs.remove();
            }
        }
    }

}