// Copyright (C) 2013 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.serviceuser;

import com.google.gerrit.extensions.annotations.RequiresCapability;
import com.google.gerrit.extensions.restapi.RestApiException;
import com.google.gerrit.server.config.ConfigResource;
import com.google.gerrit.sshd.CommandMetaData;
import com.google.gerrit.sshd.SshCommand;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;

import org.eclipse.jgit.errors.ConfigInvalidException;
import org.kohsuke.args4j.Argument;
import org.kohsuke.args4j.Option;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

@RequiresCapability(CreateServiceUserCapability.ID)
@CommandMetaData(name = "create", description = "Create Service User")
class CreateServiceUserCommand extends SshCommand {

  @Argument(index = 0, required = true, metaVar = "USERNAME", usage = "name of the service user")
  private String username;

  @Option(name = "--ssh-key", required = true, metaVar = "-|KEY", usage = "public key for SSH authentication")
  private String sshKey;

  @Inject
  private CreateServiceUser.Factory createServiceUser;

  @Override
  protected void run() throws OrmException, IOException, UnloggedFailure,
      ConfigInvalidException {
    CreateServiceUser.Input input = new CreateServiceUser.Input();
    input.sshKey = readSshKey();

    try {
      createServiceUser.create(username).apply(new ConfigResource(), input);
    } catch (RestApiException e) {
      throw die(e.getMessage());
    }
  }

  private String readSshKey() throws UnsupportedEncodingException, IOException {
    if (sshKey == null) {
      return null;
    }
    if ("-".equals(sshKey)) {
      sshKey = "";
      BufferedReader br =
          new BufferedReader(new InputStreamReader(in, "UTF-8"));
      String line;
      while ((line = br.readLine()) != null) {
        sshKey += line + "\n";
      }
    }
    return sshKey;
  }
}