package de.dennisguse.opentracks;


import androidx.recyclerview.widget.RecyclerView;
import androidx.test.core.app.ApplicationProvider;
import androidx.test.espresso.NoMatchingViewException;
import androidx.test.espresso.UiController;
import androidx.test.espresso.ViewAction;
import androidx.test.espresso.ViewAssertion;
import androidx.test.espresso.ViewInteraction;
import androidx.test.espresso.action.MotionEvents;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import androidx.test.filters.LargeTest;
import androidx.test.rule.ActivityTestRule;
import androidx.test.rule.GrantPermissionRule;

import android.content.Context;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;

import static androidx.test.espresso.Espresso.onView;
import static androidx.test.espresso.action.ViewActions.*;
import static androidx.test.espresso.matcher.ViewMatchers.*;

import de.dennisguse.opentracks.content.data.DataField;
import de.dennisguse.opentracks.content.data.Layout;
import de.dennisguse.opentracks.settings.PreferencesUtils;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static org.hamcrest.CoreMatchers.is;

@LargeTest
@RunWith(AndroidJUnit4.class)
public class EspressoCustomLayoutTest {

    private final Context context = ApplicationProvider.getApplicationContext();

    @Rule
    public ActivityTestRule<TrackListActivity> mActivityTestRule = new ActivityTestRule<>(TrackListActivity.class);

    @Rule
    public GrantPermissionRule mGrantPermissionRule =
            GrantPermissionRule.grant(
                    "android.permission.ACCESS_FINE_LOCATION");

    @Test
    public void customLayoutTest() {
        // TrackListActivity: start recording
        ViewInteraction trackControllerRecordButton = onView(withId(R.id.controller_record));
        trackControllerRecordButton.perform(click());

        // Get custom layout preferences and check all data fields are showed.
        Layout layout = PreferencesUtils.getCustomLayout();

        onView(withId(R.id.stats_recycler_view)).check(new RecyclerViewItemCountAssertion((int) layout.getFields().stream().filter(DataField::isVisible).count()));

        // stop recording
        ViewInteraction trackControllerStopButton = onView(withId(R.id.controller_stop));
        trackControllerStopButton.perform(veryLongTouch(1600));
    }

    private static class RecyclerViewItemCountAssertion implements ViewAssertion {
        private final int expectedCount;

        public RecyclerViewItemCountAssertion(int expectedCount) {
            this.expectedCount = expectedCount;
        }

        @Override
        public void check(View view, NoMatchingViewException noViewFoundException) {
            if (noViewFoundException != null) {
                throw noViewFoundException;
            }

            RecyclerView recyclerView = (RecyclerView) view;
            RecyclerView.Adapter<?> adapter = recyclerView.getAdapter();
            assertThat(adapter.getItemCount(), is(expectedCount));
        }
    }

    private static Matcher<View> childAtPosition(
            final Matcher<View> parentMatcher, final int position) {

        return new TypeSafeMatcher<View>() {
            @Override
            public void describeTo(Description description) {
                description.appendText("Child at position " + position + " in parent ");
                parentMatcher.describeTo(description);
            }

            @Override
            public boolean matchesSafely(View view) {
                ViewParent parent = view.getParent();
                return parent instanceof ViewGroup && parentMatcher.matches(parent)
                        && view.equals(((ViewGroup) parent).getChildAt(position));
            }
        };
    }

    private static ViewAction veryLongTouch(final int duration_ms) {
        return new ViewAction() {
            @Override
            public String getDescription() {
                return "Perform long touch.";
            }

            @Override
            public Matcher<View> getConstraints() {
                return isDisplayed();
            }

            @Override
            public void perform(UiController uiController, final View view) {
                // Get view absolute position
                int[] location = new int[2];
                view.getLocationOnScreen(location);

                // Offset coordinates by view position
                float[] coordinates = new float[]{location[0] + 1, location[1] + 1};

                // Send down event, pause, and send up
                MotionEvent down = MotionEvents.sendDown(uiController, coordinates, new float[]{1f, 1f}).down;
                uiController.loopMainThreadForAtLeast(duration_ms);
                MotionEvents.sendUp(uiController, down, coordinates);
            }
        };
    }
}