// Copyright (C) 2015 Ericsson
//
// 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 com.ericsson.gerrit.plugins.evictcache;

import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
import static com.github.tomakehurst.wiremock.client.WireMock.givenThat;
import static com.github.tomakehurst.wiremock.client.WireMock.post;
import static com.github.tomakehurst.wiremock.client.WireMock.postRequestedFor;
import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
import static com.github.tomakehurst.wiremock.client.WireMock.verify;

import com.google.gerrit.acceptance.NoHttpd;
import com.google.gerrit.acceptance.PluginDaemonTest;
import com.google.gerrit.server.config.SitePaths;

import com.github.tomakehurst.wiremock.http.Request;
import com.github.tomakehurst.wiremock.http.RequestListener;
import com.github.tomakehurst.wiremock.http.Response;
import com.github.tomakehurst.wiremock.junit.WireMockRule;

import org.apache.http.HttpStatus;
import org.eclipse.jgit.storage.file.FileBasedConfig;
import org.eclipse.jgit.util.FS;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.Description;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.concurrent.TimeUnit;

@NoHttpd
public class EvictCacheIT extends PluginDaemonTest {

  private static final String PLUGIN_NAME = "evict-cache";

  @Rule
  public WireMockRule wireMockRule = new WireMockRule(Constants.PORT);

  @Override
  protected void beforeTest(Description description)
      throws Exception {
    setConfig("url", Constants.URL);
    setConfig("user", "admin");
    super.beforeTest(description);
  }

  @Test
  public void flushAndSendPost() throws Exception {
    final String flushRequest = Constants.ENDPOINT_BASE + Constants.PROJECT_LIST;
    wireMockRule.addMockServiceRequestListener(new RequestListener() {
      @Override
      public void requestReceived(Request request, Response response) {
        if (request.getAbsoluteUrl().contains(flushRequest)) {
          synchronized (flushRequest) {
            flushRequest.notify();
          }
        }
      }
    });
    givenThat(post(urlEqualTo(flushRequest))
        .willReturn(aResponse().withStatus(HttpStatus.SC_OK)));

    adminSshSession.exec("gerrit flush-caches --cache " + Constants.PROJECT_LIST);
    synchronized (flushRequest) {
      flushRequest.wait(TimeUnit.SECONDS.toMillis(2));
    }
    verify(postRequestedFor(urlEqualTo(flushRequest)));
  }

  private void setConfig(String name, String value) throws Exception {
    SitePaths sitePath = new SitePaths(tempSiteDir.getRoot().toPath());
    FileBasedConfig cfg = getGerritConfigFile(sitePath);
    cfg.load();
    cfg.setString("plugin", PLUGIN_NAME, name, value);
    cfg.save();
  }

  private FileBasedConfig getGerritConfigFile(SitePaths sitePath)
      throws IOException {
    FileBasedConfig cfg =
        new FileBasedConfig(sitePath.gerrit_config.toFile(), FS.DETECTED);
    if (!cfg.getFile().exists()) {
      Path etc_path = Files.createDirectories(sitePath.etc_dir);
      Files.createFile(etc_path.resolve("gerrit.config"));
    }
    return cfg;
  }
}