// Copyright (C) 2019 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.plugins.checks.api;

import com.google.common.collect.ImmutableList;
import com.google.gerrit.exceptions.StorageException;
import com.google.gerrit.extensions.client.ListOption;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.plugins.checks.Check;
import com.google.gerrit.plugins.checks.CheckJson;
import com.google.gerrit.plugins.checks.Checks;
import com.google.gerrit.plugins.checks.Checks.GetCheckOptions;
import com.google.gerrit.plugins.checks.ListChecksOption;
import com.google.gerrit.server.change.RevisionResource;
import com.google.inject.Inject;
import java.io.IOException;
import java.util.EnumSet;
import org.kohsuke.args4j.Option;

public class ListChecks implements RestReadView<RevisionResource> {
  private final CheckJson.Factory checkJsonFactory;
  private final Checks checks;

  private final EnumSet<ListChecksOption> options = EnumSet.noneOf(ListChecksOption.class);

  @Option(name = "-o", usage = "Output options")
  void addOption(ListChecksOption o) {
    options.add(o);
  }

  @Option(name = "-O", usage = "Output option flags, in hex")
  void setOptionFlagsHex(String hex) {
    options.addAll(ListOption.fromBits(ListChecksOption.class, Integer.parseInt(hex, 16)));
  }

  @Inject
  ListChecks(CheckJson.Factory checkJsonFactory, Checks checks) {
    this.checkJsonFactory = checkJsonFactory;
    this.checks = checks;
  }

  @Override
  public ImmutableList<CheckInfo> apply(RevisionResource resource)
      throws AuthException, BadRequestException, ResourceConflictException, StorageException,
          IOException {
    ImmutableList.Builder<CheckInfo> result = ImmutableList.builder();

    GetCheckOptions getCheckOptions = GetCheckOptions.withBackfilling();
    ImmutableList<Check> allChecks =
        checks.getChecks(resource.getProject(), resource.getPatchSet().id(), getCheckOptions);

    CheckJson checkJson = checkJsonFactory.create(options);
    for (Check check : allChecks) {
      result.add(checkJson.format(check));
    }
    return result.build();
  }
}