// Copyright (C) 2012 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.adminconsole;

import com.google.gerrit.common.data.GlobalCapability;
import com.google.gerrit.extensions.annotations.CapabilityScope;
import com.google.gerrit.extensions.annotations.RequiresCapability;
import com.google.gerrit.extensions.common.GroupInfo;
import com.google.gerrit.extensions.common.SshKeyInfo;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.Account.Id;
import com.google.gerrit.reviewdb.client.AccountExternalId;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.account.AccountResolver;
import com.google.gerrit.server.account.AccountResource;
import com.google.gerrit.server.account.GetGroups;
import com.google.gerrit.server.account.GetSshKeys;
import com.google.gerrit.sshd.CommandMetaData;
import com.google.gerrit.sshd.SshCommand;
import com.google.gwtorm.server.OrmException;
import com.google.gwtorm.server.SchemaFactory;
import com.google.inject.Inject;
import com.google.inject.Provider;

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

import java.io.IOException;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Set;

@RequiresCapability(value=GlobalCapability.ADMINISTRATE_SERVER, scope=CapabilityScope.CORE)
@CommandMetaData(name = "show-account", description = "Displays user information")
public final class ShowAccountCommand extends SshCommand {

  @Argument(usage = "User information to find: LastName,\\ Firstname,  email@address.com, account id or an user name.  Be sure to double-escape spaces, for example: \"show-account Last,\\\\ First\"")
  private String name = "";

  @Option(name = "--show-groups", usage = "show group membership by user?")
  private boolean showGroups = false;

  @Option(name = "--filter-groups", usage = "filter group string")
  private String filterGroups = null;

  @Option(name = "--show-keys", usage = "show user's public keys?")
  private boolean showKeys = false;

  private final AccountResolver accountResolver;
  private final SchemaFactory<ReviewDb> schema;
  private final Provider<GetGroups> accountGetGroups;
  private final IdentifiedUser.GenericFactory userFactory;
  private final Provider<GetSshKeys> getSshKeys;

  @Inject
  ShowAccountCommand(AccountResolver accountResolver,
      Provider<GetGroups> accountGetGroups,
      IdentifiedUser.GenericFactory userFactory,
      Provider<GetSshKeys> getSshKeys,
      SchemaFactory<ReviewDb> schema) {
    this.accountResolver = accountResolver;
    this.accountGetGroups = accountGetGroups;
    this.userFactory = userFactory;
    this.schema = schema;
    this.getSshKeys = getSshKeys;
  }

  @Override
  public void run() throws UnloggedFailure, OrmException {
    Account account;

    if (name.isEmpty()) {
      throw new UnloggedFailure(1,
          "You need to tell me who to find:  LastName,\\\\ Firstname, email@address.com, account id or an user name.  "
              + "Be sure to double-escape spaces, for example: \"show-account Last,\\\\ First\"");
    }
    try (ReviewDb db = schema.open()) {
      Set<Id> idList = accountResolver.findAll(db, name);
      if (idList.isEmpty()) {
        throw new UnloggedFailure(1,
            "No accounts found for your query: \""
                + name
                + "\""
                + " Tip: Try double-escaping spaces, for example: \"show-account Last,\\\\ First\"");
      }
      stdout.println("Found " + idList.size() + " result"
          + (idList.size() > 1 ? "s" : "") + ": for query: \"" + name + "\"");
      stdout.println();

      for (Id id : idList) {
        account = accountResolver.find(db, id.toString());
        if (account == null) {
          throw new UnloggedFailure("Account " + id.toString() + " does not exist.");
        }
        stdout.println("Full name:         " + account.getFullName());
        stdout.println("Account Id:        " + id.toString());
        stdout.println("Preferred Email:   " + account.getPreferredEmail());
        stdout.println("User Name:         " + account.getUserName());
        stdout.println("Active:            " + account.isActive());
        stdout.println("Registered on:     " + account.getRegisteredOn());


        stdout.println("");
        stdout.println("External Ids:");
        stdout.println(String
            .format("%-50s %s", "Email Address:", "External Id:"));
        for (AccountExternalId accountExternalId : db.accountExternalIds()
            .byAccount(account.getId())) {
          stdout.println(String.format("%-50s %s",
              (accountExternalId.getEmailAddress() == null ? ""
                  : accountExternalId.getEmailAddress()), accountExternalId
                  .getExternalId()));
        }

        if (showKeys) {
          stdout.println("");
          stdout.println("Public Keys:");
          List<SshKeyInfo> sshKeys;
          try {
            sshKeys = getSshKeys.get()
                .apply(new AccountResource(userFactory.create(id)));
          } catch (AuthException | IOException | ConfigInvalidException e) {
            throw new UnloggedFailure(1, "Error getting sshkeys: " + e.getMessage(), e);
          }
          if (sshKeys == null || sshKeys.isEmpty()) {
            stdout.println("None");
          } else {
            stdout.println(String.format("%-9s %s", "Status:", "Key:"));
            for (SshKeyInfo sshKey : sshKeys) {
              stdout.println(String.format("%-9s %s", (sshKey.valid
                  ? "Active" : "Inactive"), sshKey.sshPublicKey));
            }
          }
        }

        if (showGroups) {
          stdout.println();
          stdout.println("Member of groups"
              + (filterGroups == null ? "" : " (Filtering on \"" + filterGroups
                  + "\")") + ":");
          List<GroupInfo> groupInfos =
              accountGetGroups.get().apply(
                  new AccountResource(userFactory.create(id)));

          Collections.sort(groupInfos, new CustomComparator());
          for (GroupInfo groupInfo : groupInfos) {
            if (null == filterGroups || groupInfo.name.toLowerCase().contains(filterGroups.toLowerCase
                ())) {
              stdout.println(groupInfo.name);
            }
          }
        }
        stdout.println("");
      }
    }
  }

  private static class CustomComparator implements Comparator<GroupInfo> {
    @Override
    public int compare(GroupInfo o1, GroupInfo o2) {
      return o1.name.compareTo(o2.name);
    }
  }
}