// Copyright (C) 2017 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.server.account;

import com.google.common.base.Strings;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.DefaultInput;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.account.PutStatus.Input;
import com.google.gerrit.server.permissions.GlobalPermission;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.google.inject.Singleton;
import java.io.IOException;
import org.eclipse.jgit.errors.ConfigInvalidException;

@Singleton
public class PutStatus implements RestModifyView<AccountResource, Input> {
  public static class Input {
    @DefaultInput String status;

    public Input(String status) {
      this.status = status;
    }

    public Input() {}
  }

  private final Provider<CurrentUser> self;
  private final PermissionBackend permissionBackend;
  private final AccountsUpdate.Server accountsUpdate;

  @Inject
  PutStatus(
      Provider<CurrentUser> self,
      PermissionBackend permissionBackend,
      AccountsUpdate.Server accountsUpdate) {
    this.self = self;
    this.permissionBackend = permissionBackend;
    this.accountsUpdate = accountsUpdate;
  }

  @Override
  public Response<String> apply(AccountResource rsrc, Input input)
      throws AuthException, ResourceNotFoundException, OrmException, IOException,
          PermissionBackendException, ConfigInvalidException {
    if (self.get() != rsrc.getUser()) {
      permissionBackend.user(self).check(GlobalPermission.MODIFY_ACCOUNT);
    }
    return apply(rsrc.getUser(), input);
  }

  public Response<String> apply(IdentifiedUser user, Input input)
      throws ResourceNotFoundException, IOException, ConfigInvalidException {
    if (input == null) {
      input = new Input();
    }

    String newStatus = input.status;
    Account account =
        accountsUpdate
            .create()
            .update(user.getAccountId(), a -> a.setStatus(Strings.nullToEmpty(newStatus)));
    if (account == null) {
      throw new ResourceNotFoundException("account not found");
    }
    return Strings.isNullOrEmpty(account.getStatus())
        ? Response.none()
        : Response.ok(account.getStatus());
  }
}