// Copyright 2023 The Pigweed 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
//
//     https://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.

#include "pw_system/file_manager.h"

#if PW_SYSTEM_ENABLE_CRASH_HANDLER
#include "pw_system/crash_snapshot.h"
#endif  // PW_SYSTEM_ENABLE_CRASH_HANDLER

#if PW_SYSTEM_ENABLE_TRACE_SERVICE
#include "pw_system/trace_service.h"
#endif  // PW_SYSTEM_ENABLE_TRACE_SERVICE

namespace pw::system {

namespace {
FileManager file_manager;
}

FileManager& GetFileManager() { return file_manager; }

FileManager::FileManager()
    :
#if PW_SYSTEM_ENABLE_CRASH_HANDLER
      crash_snapshot_handler_(kCrashSnapshotTransferHandlerId,
                              GetCrashSnapshotBuffer()),
      crash_snapshot_filesystem_entry_(
          kCrashSnapshotFilename,
          kCrashSnapshotTransferHandlerId,
          file::FlatFileSystemService::Entry::FilePermissions::READ,
          GetCrashSnapshotBuffer()),
#endif  // PW_SYSTEM_ENABLE_CRASH_HANDLER
// TODO: b/354777918 - this will fail if both services disabled.  Need to come
// up with a more scalable pattern for registering files.
#if PW_SYSTEM_ENABLE_TRACE_SERVICE
      trace_data_handler_(kTraceTransferHandlerId, GetTraceData()),
      trace_data_filesystem_entry_(
          kTraceFilename,
          kTraceTransferHandlerId,
          file::FlatFileSystemService::Entry::FilePermissions::READ,
          GetTraceData()),
#endif  // PW_SYSTEM_ENABLE_TRACE_SERVICE
      transfer_handlers_{},
      file_system_entries_{} {
  // Every handler & filesystem element must be added to the collections, using
  // the associated handler ID as the index.
#if PW_SYSTEM_ENABLE_CRASH_HANDLER
  transfer_handlers_[kCrashSnapshotTransferHandlerId] =
      &crash_snapshot_handler_;
  file_system_entries_[kCrashSnapshotTransferHandlerId] =
      &crash_snapshot_filesystem_entry_;
#endif  // PW_SYSTEM_ENABLE_CRASH_HANDLER
#if PW_SYSTEM_ENABLE_TRACE_SERVICE
  transfer_handlers_[kTraceTransferHandlerId] = &trace_data_handler_;
  file_system_entries_[kTraceTransferHandlerId] = &trace_data_filesystem_entry_;
#endif  // PW_SYSTEM_ENABLE_TRACE_SERVICE
}

}  // namespace pw::system