/*
 * Copyright 2018 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package androidx.fragment.app;

import android.os.SystemClock;

import org.mockito.exceptions.base.MockitoAssertionError;
import org.mockito.internal.verification.VerificationModeFactory;
import org.mockito.internal.verification.api.VerificationData;
import org.mockito.invocation.Invocation;
import org.mockito.verification.VerificationMode;

import java.util.List;

public class CtsMockitoUtils {
    private CtsMockitoUtils() {}

    public static VerificationMode within(long timeout) {
        return new Within(timeout);
    }

    public static class Within implements VerificationMode {
        private static final long TIME_SLICE = 50;
        private final long mTimeout;

        public Within(long timeout) {
            mTimeout = timeout;
        }

        @Override
        public void verify(VerificationData data) {
            long timeout = mTimeout;
            MockitoAssertionError errorToRethrow = null;
            // Loop in the same way we do in PollingCheck, sleeping and then testing for the target
            // invocation
            while (timeout > 0) {
                SystemClock.sleep(TIME_SLICE);

                try {
                    final List<Invocation> actualInvocations = data.getAllInvocations();
                    // Iterate over all invocations so far to see if we have a match
                    for (Invocation invocation : actualInvocations) {
                        if (data.getWanted().matches(invocation)) {
                            // Found our match within our timeout. Mark all invocations as verified
                            markAllInvocationsAsVerified(data);
                            // and return
                            return;
                        }
                    }
                } catch (MockitoAssertionError assertionError) {
                    errorToRethrow = assertionError;
                }

                timeout -= TIME_SLICE;
            }

            if (errorToRethrow != null) {
                throw errorToRethrow;
            }

            throw new MockitoAssertionError("Timed out while waiting " + mTimeout + "ms for "
                    + data.getWanted().toString());
        }

        @Override
        public VerificationMode description(String description) {
            return VerificationModeFactory.description(this, description);
        }

        private void markAllInvocationsAsVerified(VerificationData data) {
            for (Invocation invocation : data.getAllInvocations()) {
                invocation.markVerified();
                data.getWanted().captureArgumentsFrom(invocation);
            }
        }
    }

}