// Copyright 2017 The Fuchsia Authors
//
// 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.

#ifndef COBALT_ANALYZER_STORE_BIGTABLE_EMULATOR_HELPER_H_
#define COBALT_ANALYZER_STORE_BIGTABLE_EMULATOR_HELPER_H_

#include <glog/logging.h>

#include <chrono>

#include "analyzer/store/bigtable_admin.h"
#include "analyzer/store/bigtable_names.h"
#include "analyzer/store/bigtable_store.h"

// This file contains utilities useful to our Bigtable Emulator tests. These
// are tests that assume the existence of a local Bigtable Emulator process
// and connect to it via gRPC.

namespace cobalt {
namespace analyzer {
namespace store {

// A concrete instantiation of the parameter StoreFactoryClass used in several
// of our templated tests. The NewStore() function returns a BigtableStore*
// that will connect to the local Bigtable Emulator listening on the
// default port. NewStore() also ensures that the Bigtable Emulator is
// up and listening and that the Cobalt tables have been created.
class BigtableStoreEmulatorFactory {
 public:
  static BigtableStore* NewStore() {
    static const char kTestProject[] = "TestProject";
    static const char kTestInstance[] = "TestInstance";
    static const char kDefaultUrl[] = "localhost:9000";

    BigtableAdmin bigtable_admin(kDefaultUrl,
                                 grpc::InsecureChannelCredentials(),
                                 kTestProject, kTestInstance);

    // Wait for up to 10 seconds for the Bigtable Emulator to start listening.
    if (!bigtable_admin.WaitForConnected(std::chrono::system_clock::now() +
                                         std::chrono::seconds(10))) {
      LOG(FATAL) << "Waited for 10 seconds to connect to Bigtable Emulator.";
    }

    // Make sure the tables have been created.
    if (!bigtable_admin.CreateTablesIfNecessary()) {
      LOG(FATAL) << "Unable to create the Cobalt BigTables.";
    }

    return new BigtableStore(kDefaultUrl, kDefaultUrl,
                             grpc::InsecureChannelCredentials(), kTestProject,
                             kTestInstance);
  }
};

}  // namespace store
}  // namespace analyzer
}  // namespace cobalt

#endif  // COBALT_ANALYZER_STORE_BIGTABLE_EMULATOR_HELPER_H_