/*
 * Copyright (C) 2025 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.
 */

#ifndef SRC_TRACE_PROCESSOR_IMPORTERS_PROTO_DEOBFUSCATION_MODULE_H_
#define SRC_TRACE_PROCESSOR_IMPORTERS_PROTO_DEOBFUSCATION_MODULE_H_

#include <cstdint>
#include <optional>
#include <vector>

#include "perfetto/protozero/field.h"
#include "perfetto/trace_processor/trace_blob.h"
#include "protos/perfetto/trace/profiling/deobfuscation.pbzero.h"
#include "protos/perfetto/trace/trace_packet.pbzero.h"
#include "src/trace_processor/containers/string_pool.h"
#include "src/trace_processor/importers/common/parser_types.h"
#include "src/trace_processor/importers/proto/heap_graph_tracker.h"
#include "src/trace_processor/importers/proto/packet_sequence_state_generation.h"
#include "src/trace_processor/importers/proto/proto_importer_module.h"
#include "src/trace_processor/tables/metadata_tables_py.h"
#include "src/trace_processor/tables/profiler_tables_py.h"

namespace perfetto::trace_processor {

// Importer module for deobfuscation data.
class DeobfuscationModule : public ProtoImporterModule {
 public:
  explicit DeobfuscationModule(ProtoImporterModuleContext* module_context,
                               TraceProcessorContext* context);
  ~DeobfuscationModule() override;

  // TODO (ddiproietto): Is it better to use TokenizePacket instead?
  void ParseTracePacketData(const protos::pbzero::TracePacket::Decoder& decoder,
                            int64_t ts,
                            const TracePacketData& data,
                            uint32_t field_id) override;

  void NotifyEndOfFile() override;

 private:
  void StoreDeobfuscationMapping(protozero::ConstBytes);

  void GuessPackages();
  void GuessPackageForCallsite(tables::ProcessTable::Id,
                               tables::StackProfileCallsiteTable::Id);

  void DeobfuscateHeapGraphClass(
      std::optional<StringPool::Id> package_name_id,
      StringPool::Id obfuscated_class_id,
      const protos::pbzero::ObfuscatedClass::Decoder& cls);

  void ParseDeobfuscationMappingForHeapGraph(
      const protos::pbzero::DeobfuscationMapping::Decoder&,
      HeapGraphTracker*);
  void ParseDeobfuscationMappingForProfiles(
      const protos::pbzero::DeobfuscationMapping::Decoder&);
  void ParseDeobfuscationMapping(protozero::ConstBytes, HeapGraphTracker*);

  std::vector<TraceBlob> packets_;
  TraceProcessorContext* context_;
};

}  // namespace perfetto::trace_processor

#endif  // SRC_TRACE_PROCESSOR_IMPORTERS_PROTO_DEOBFUSCATION_MODULE_H_