// 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.google.gerrit.testing;

import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Maps;
import com.google.gerrit.entities.Account;
import com.google.gerrit.server.account.AccountCache;
import com.google.gerrit.server.account.AccountState;
import com.google.gerrit.server.util.time.TimeUtil;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import org.eclipse.jgit.lib.ObjectId;

/** Fake implementation of {@link AccountCache} for testing. */
public class FakeAccountCache implements AccountCache {
  private final Map<Account.Id, AccountState> byId;

  public FakeAccountCache() {
    byId = new HashMap<>();
  }

  @Override
  public synchronized AccountState getEvenIfMissing(Account.Id accountId) {
    AccountState state = byId.get(accountId);
    if (state != null) {
      return state;
    }
    return newState(
        Account.builder(accountId, TimeUtil.now())
            .setMetaId("1234567812345678123456781234567812345678")
            .setUniqueTag("1234567812345678123456781234567812345678")
            .build());
  }

  @Override
  public synchronized Optional<AccountState> get(Account.Id accountId) {
    return Optional.ofNullable(byId.get(accountId));
  }

  @Override
  public synchronized ImmutableMap<Account.Id, AccountState> get(
      Collection<Account.Id> accountIds) {
    return ImmutableMap.copyOf(Maps.filterKeys(byId, accountIds::contains));
  }

  @Override
  public synchronized Optional<AccountState> getByUsername(String username) {
    throw new UnsupportedOperationException();
  }

  @Override
  public AccountState getFromMetaId(Account.Id accountId, ObjectId metaId) {
    return get(accountId).get();
  }

  public synchronized void put(Account account) {
    AccountState state = newState(account);
    byId.put(account.id(), state);
  }

  private static AccountState newState(Account account) {
    return AccountState.forAccount(account);
  }
}