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package com.zebrunner.agent.testng.core;

import lombok.Getter;
import lombok.RequiredArgsConstructor;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * Stores context of specific test method (not to be confused with specific test execution) belonging to specific test class instance
 */
public class TestMethodContext {

    private static final AtomicBoolean CUCUMBER = new AtomicBoolean(true);
    private static final Map, List> CUCUMBER_PICKLES = new ConcurrentHashMap<>();
    /**
     * Represents current test method invocation. 0 means that method was not invoked yet.
     */
    private final ThreadLocal currentInvocationCount
            = ThreadLocal.withInitial(() -> new AtomicInteger(0));

    @Getter
    private List dataProviderIndicesForRerun = Collections.emptyList();
    private List dataProviderData = Collections.emptyList();
    private final ThreadLocal currentDataProviderData = new ThreadLocal<>();
    private final ThreadLocal currentDataProviderIteratorIndex = ThreadLocal.withInitial(() -> -1);

    public void setDataProviderIndicesForRerun(Collection indicesForRerun) {
        dataProviderIndicesForRerun = new ArrayList<>(indicesForRerun);
        Collections.sort(dataProviderIndicesForRerun);
    }

    public int getDataProviderSize() {
        return dataProviderData.size();
    }

    public void setDataProviderData(List dataProviderData) {
        if (dataProviderData != null) {
            this.dataProviderData = dataProviderData;
        }
    }

    public void setCurrentDataProviderIteratorIndex(int currentDataProviderIteratorIndex) {
        this.currentDataProviderIteratorIndex.set(currentDataProviderIteratorIndex);
    }

    public void setCurrentDataProviderData(Object[] parameters, Integer index) {
        this.currentDataProviderData.set(new DataProviderData(parameters, index));
    }

    public int getCurrentDataProviderIndex(Object[] actualTestParameters) {
        return this.getCucumberDataProviderData(actualTestParameters)
                .or(() -> getCurrentDataProviderIteratorIndex()
                        .filter(currentIndex -> currentIndex != -1))
                   // the checks are performed for cases
                   // when data provider data is loaded in one thread but is used in another one.
                   // in such cases we try to find data provider line by matching
                   // the test method arguments or their values
                   .or(() -> this.getReferenceEqualDataProviderData(actualTestParameters))
                   .or(() -> this.getValueEqualDataProviderData(actualTestParameters))
                   .or(() -> this.getStringSameDataProviderData(actualTestParameters))
                   .or(() -> this.getIndexOfMatchingDataProviderData(actualTestParameters))
                   .orElse(-1);
    }

    public Optional getCucumberDataProviderData(Object[] data) {
        if (!CUCUMBER.get()) {
            return Optional.empty();
        }
        try {
            Class pickleWrapperClass = Class.forName("io.cucumber.testng.PickleWrapper");
            Class featureWrapperClass = Class.forName("io.cucumber.testng.FeatureWrapper");
            Object dataFeatureWrapper = Arrays.stream(data)
                    .filter(featureWrapperClass::isInstance)
                    .findAny()
                    .orElseThrow(ClassNotFoundException::new);
            Object dataPickleWrapper = Arrays.stream(data)
                    .filter(pickleWrapperClass::isInstance)
                    .findAny()
                    .orElseThrow(ClassNotFoundException::new);

            String dataFeatureName = dataFeatureWrapper.toString()
                    .replaceAll("^[\"]|[\"]$", "");
            String dataPickleName = dataPickleWrapper.toString()
                    .replaceAll("^[\"]|[\"]$", "");

            List pickles = CUCUMBER_PICKLES.computeIfAbsent(new KeyValueHolder<>(dataFeatureName, dataPickleName), k -> {
                List scenarioOutlinePickles = new LinkedList<>();
                for (Object[] dataProviderDatum : dataProviderData) {
                    List dataProviderLineAsList = Arrays.asList(dataProviderDatum);
                    Object featureWrapper = dataProviderLineAsList.stream()
                            .filter(featureWrapperClass::isInstance)
                            .findAny()
                            .orElseThrow();
                    Object pickleWrapper = dataProviderLineAsList.stream()
                            .filter(pickleWrapperClass::isInstance)
                            .findAny()
                            .orElseThrow();

                    String featureName = featureWrapper.toString()
                            .replaceAll("^[\"]|[\"]$", "");
                    String pickleName = pickleWrapper.toString()
                            .replaceAll("^[\"]|[\"]$", "");
                    if (featureName.equals(k.getKey()) && pickleName.equals(k.getValue())) {
                        scenarioOutlinePickles.add(pickleWrapper);
                    }
                }
                //todo add scenario outline detection with 1 line
                if (scenarioOutlinePickles.size() < 2) {
                    return List.of();
                }
                return scenarioOutlinePickles;
            });
            if (pickles.isEmpty()) {
                return Optional.of(-1);
            }
            return Optional.of(pickles.indexOf(dataPickleWrapper));
        } catch (ClassNotFoundException e) {
            CUCUMBER.set(false);
            return Optional.empty();
        }
    }


    public Optional getCurrentDataProviderIteratorIndex() {
        Integer currentIndex = currentDataProviderIteratorIndex.get();

        return currentIndex > -1 && dataProviderIndicesForRerun.size() > currentIndex
                ? Optional.ofNullable(dataProviderIndicesForRerun.get(currentIndex))
                : Optional.of(currentIndex);
    }

    public Optional getReferenceEqualDataProviderData(Object[] data) {
        for (int i = 0; i < dataProviderData.size(); i++) {
            if (dataProviderData.get(i) == data) {
                return Optional.of(i);
            }
        }

        return Optional.empty();
    }

    public Optional getValueEqualDataProviderData(Object[] data) {
        List dataAsList = Arrays.asList(data);

        for (int i = 0; i < dataProviderData.size(); i++) {
            List dataProviderLineAsList = Arrays.asList(dataProviderData.get(i));

            if (dataProviderLineAsList.equals(dataAsList)) {
                return Optional.of(i);
            }
        }

        return Optional.empty();
    }

    public Optional getStringSameDataProviderData(Object[] data) {
        List dataAsList = this.toStringsList(data);

        for (int i = 0; i < dataProviderData.size(); i++) {
            List dataProviderLineAsList = this.toStringsList(dataProviderData.get(i));

            if (dataProviderLineAsList.equals(dataAsList)) {
                return Optional.of(i);
            }
        }

        return Optional.empty();
    }

    private List toStringsList(Object[] data) {
        return Arrays.stream(data)
                     .map(Objects::toString)
                     .collect(Collectors.toList());
    }

    private Optional getIndexOfMatchingDataProviderData(Object[] actualTestParameters) {
        DataProviderData currentDataProviderData = this.currentDataProviderData.get();

        if (currentDataProviderData != null && Arrays.equals(currentDataProviderData.parameters, actualTestParameters)) {
            return Optional.ofNullable(currentDataProviderData.index);
        }

        return Optional.empty();
    }

    public void incrementInvocationIndex() {
        currentInvocationCount.get().incrementAndGet();
    }

    public int getCurrentInvocationIndex() {
        return currentInvocationCount.get().get();
    }

    @RequiredArgsConstructor
    private static class DataProviderData {

        private final Object[] parameters;
        private final Integer index;

    }

}
    

    

    

            

    

            



    
    






    
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