// Copyright (C) 2009 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.google.gerrit.httpd.rpc.account;

import com.google.gerrit.common.data.AgreementInfo;
import com.google.gerrit.common.data.ContributorAgreement;
import com.google.gerrit.common.data.PermissionRule;
import com.google.gerrit.common.data.PermissionRule.Action;
import com.google.gerrit.httpd.rpc.Handler;
import com.google.gerrit.reviewdb.client.AccountGroup;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.project.ProjectCache;
import com.google.inject.Inject;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

class AgreementInfoFactory extends Handler<AgreementInfo> {
  private static final Logger log = LoggerFactory.getLogger(AgreementInfoFactory.class);

  interface Factory {
    AgreementInfoFactory create();
  }

  private final IdentifiedUser user;
  private final ProjectCache projectCache;

  private AgreementInfo info;

  @Inject
  AgreementInfoFactory(final IdentifiedUser user,
      final ProjectCache projectCache) {
    this.user = user;
    this.projectCache = projectCache;
  }

  @Override
  public AgreementInfo call() throws Exception {
    List<String> accepted = new ArrayList<>();
    Map<String, ContributorAgreement> agreements = new HashMap<>();
    Collection<ContributorAgreement> cas =
        projectCache.getAllProjects().getConfig().getContributorAgreements();
    for (ContributorAgreement ca : cas) {
      agreements.put(ca.getName(), ca.forUi());

      List<AccountGroup.UUID> groupIds = new ArrayList<>();
      for (PermissionRule rule : ca.getAccepted()) {
        if ((rule.getAction() == Action.ALLOW) && (rule.getGroup() != null)) {
          if (rule.getGroup().getUUID() == null) {
            log.warn("group \"" + rule.getGroup().getName() + "\" does not " +
                " exist, referenced in CLA \"" + ca.getName() + "\"");
          } else {
            groupIds.add(new AccountGroup.UUID(rule.getGroup().getUUID().get()));
          }
        }
      }
      if (user.getEffectiveGroups().containsAnyOf(groupIds)) {
        accepted.add(ca.getName());
      }
    }

    info = new AgreementInfo();
    info.setAccepted(accepted);
    info.setAgreements(agreements);
    return info;
  }
}