// Copyright (C) 2016 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 com.googlesource.gerrit.plugins.manager;

import com.google.gerrit.extensions.annotations.PluginData;
import com.google.gerrit.httpd.WebLoginListener;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.plugins.PluginLoader;
import com.google.inject.Inject;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.Date;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class FirstWebLoginListener implements WebLoginListener {
  private final Path pluginData;
  private final PluginLoader pluginLoader;
  private final String pluginUrlPath;

  @Inject
  public FirstWebLoginListener(PluginLoader pluginLoader,
      @PluginData Path pluginData,
      @PluginCanonicalWebUrlPath String pluginUrlPath) {
    this.pluginData = pluginData;
    this.pluginLoader = pluginLoader;
    this.pluginUrlPath = pluginUrlPath;
  }

  @Override
  public void onLogin(IdentifiedUser user, HttpServletRequest request,
      HttpServletResponse response) throws IOException {
    if (pluginLoader.isRemoteAdminEnabled()
        && user.getCapabilities().canAdministrateServer()) {
      Path firstLoginFile =
          pluginData.resolve("firstLogin." + user.getAccountId().get());
      if (!firstLoginFile.toFile().exists()) {
        response.sendRedirect(pluginUrlPath + "static/intro.html");

        Files.write(firstLoginFile, new Date().toString().getBytes(),
            StandardOpenOption.CREATE);
      }
    }
  }

  @Override
  public void onLogout(IdentifiedUser user, HttpServletRequest request,
      HttpServletResponse response) {
  }
}