/*
 * MIT License
 *
 * Copyright (c) 2020-present Cloudogu GmbH and Contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package sonia.scm.store;

import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import sonia.scm.cache.MapCache;

import java.io.File;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.in;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
class DataFileCacheTest {

  @Nested
  class WithActivatedCache {

    private final MapCache<File, Object> backingCache = new MapCache<>();
    private final DataFileCache dataFileCache = new DataFileCache(backingCache, true);

    @Test
    void shouldReturnCachedData() {
      File file = new File("/some.string");
      backingCache.put(file, "some string");

      DataFileCache.DataFileCacheInstance instance = dataFileCache.instanceFor(String.class);

      Object result = instance.get(file, () -> {
        throw new RuntimeException("should not be read");
      });

      assertThat(result).isSameAs("some string");
    }

    @Test
    void shouldReadDataIfNotCached() {
      File file = new File("/some.string");

      DataFileCache.DataFileCacheInstance instance = dataFileCache.instanceFor(String.class);

      Object result = instance.get(file, () -> "some string");

      assertThat(result).isSameAs("some string");
      assertThat(backingCache.get(file)).isSameAs("some string");
    }

    @Test
    void shouldReadDataAnewIfOfDifferentType() {
      File file = new File("/some.string");
      backingCache.put(file, 42);

      DataFileCache.DataFileCacheInstance instance = dataFileCache.instanceFor(String.class);

      Object result = instance.get(file, () -> "some string");

      assertThat(result).isSameAs("some string");
      assertThat(backingCache.get(file)).isSameAs("some string");
    }

    @Test
    void shouldRemoveOutdatedDataIfOfDifferentType() {
      File file = new File("/some.string");
      backingCache.put(file, 42);

      DataFileCache.DataFileCacheInstance instance = dataFileCache.instanceFor(String.class);

      Object result = instance.get(file, () -> null);

      assertThat(result).isNull();
      assertThat(backingCache.get(file)).isNull();
    }

    @Test
    void shouldCacheNewData() {
      File file = new File("/some.string");

      DataFileCache.DataFileCacheInstance instance = dataFileCache.instanceFor(String.class);

      instance.put(file, "some string");

      assertThat(backingCache.get(file)).isSameAs("some string");
    }

    @Test
    void shouldRemoveDataFromCache() {
      File file = new File("/some.string");
      backingCache.put(file, "some string");

      DataFileCache.DataFileCacheInstance instance = dataFileCache.instanceFor(String.class);

      instance.remove(file);

      assertThat(backingCache.get(file)).isNull();
    }
  }

  @Nested
  class WithDeactivatedCache {

    private final DataFileCache dataFileCache = new DataFileCache(null, false);

    @Test
    void shouldReadData() {
      File file = new File("/some.string");

      DataFileCache.DataFileCacheInstance instance = dataFileCache.instanceFor(String.class);

      Object result = instance.get(file, () -> "some string");

      assertThat(result).isSameAs("some string");
    }
  }
}
