// Copyright 2024 Google LLC

//

// 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.

#ifndef THIRD_PARTY_CEL_CPP_EXTENSIONS_PROTOBUF_INTERNAL_QUALIFY_H_

#define THIRD_PARTY_CEL_CPP_EXTENSIONS_PROTOBUF_INTERNAL_QUALIFY_H_

#include "absl/base/nullability.h"

#include "absl/status/status.h"

#include "absl/status/statusor.h"

#include "base/attribute.h"

#include "common/memory.h"

#include "runtime/runtime_options.h"

#include "google/protobuf/descriptor.h"

#include "google/protobuf/map_field.h"

#include "google/protobuf/message.h"

#include "google/protobuf/reflection.h"

namespace cel::extensions::protobuf_internal {

class ProtoQualifyState {

 public:

  ProtoQualifyState(const google::protobuf::Message* absl_nonnull message,

                    const google::protobuf::Descriptor* absl_nonnull descriptor,

                    const google::protobuf::Reflection* absl_nonnull reflection)

      : message_(message),

        descriptor_(descriptor),

        reflection_(reflection),

        repeated_field_desc_(nullptr) {}

  virtual ~ProtoQualifyState() = default;

  ProtoQualifyState(const ProtoQualifyState&) = delete;

  ProtoQualifyState& operator=(const ProtoQualifyState&) = delete;

  absl::Status ApplySelectQualifier(const cel::SelectQualifier& qualifier,

                                    MemoryManagerRef memory_manager);

  absl::Status ApplyLastQualifierHas(const cel::SelectQualifier& qualifier,

                                     MemoryManagerRef memory_manager);

  absl::Status ApplyLastQualifierGet(const cel::SelectQualifier& qualifier,

                                     MemoryManagerRef memory_manager);

 private:

  virtual void SetResultFromError(absl::Status status,

                                  MemoryManagerRef memory_manager) = 0;

  virtual void SetResultFromBool(bool value) = 0;

  virtual absl::Status SetResultFromField(

      const google::protobuf::Message* message, const google::protobuf::FieldDescriptor* field,

      ProtoWrapperTypeOptions unboxing_option,

      MemoryManagerRef memory_manager) = 0;

  virtual absl::Status SetResultFromRepeatedField(

      const google::protobuf::Message* message, const google::protobuf::FieldDescriptor* field,

      int index, MemoryManagerRef memory_manager) = 0;

  virtual absl::Status SetResultFromMapField(

      const google::protobuf::Message* message, const google::protobuf::FieldDescriptor* field,

      const google::protobuf::MapValueConstRef& value,

      MemoryManagerRef memory_manager) = 0;

  absl::Status ApplyFieldSpecifier(const cel::FieldSpecifier& field_specifier,

                                   MemoryManagerRef memory_manager);

  absl::StatusOr<int> CheckListIndex(

      const cel::AttributeQualifier& qualifier) const;

  absl::Status ApplyAttributeQualifierList(

      const cel::AttributeQualifier& qualifier,

      MemoryManagerRef memory_manager);

  absl::StatusOr<google::protobuf::MapValueConstRef> CheckMapIndex(

      const cel::AttributeQualifier& qualifier) const;

  absl::Status ApplyAttributeQualifierMap(

      const cel::AttributeQualifier& qualifier,

      MemoryManagerRef memory_manager);

  absl::Status ApplyAttributeQualifer(const cel::AttributeQualifier& qualifier,

                                      MemoryManagerRef memory_manager);

  absl::Status MapHas(const cel::AttributeQualifier& key,

                      MemoryManagerRef memory_manager);

  absl::Status ApplyLastQualifierMessageGet(

      const cel::FieldSpecifier& specifier, MemoryManagerRef memory_manager);

  absl::Status ApplyLastQualifierGetList(

      const cel::AttributeQualifier& qualifier,

      MemoryManagerRef memory_manager);

  absl::Status ApplyLastQualifierGetMap(

      const cel::AttributeQualifier& qualifier,

      MemoryManagerRef memory_manager);

  const google::protobuf::Message* absl_nonnull message_;

  const google::protobuf::Descriptor* absl_nonnull descriptor_;

  const google::protobuf::Reflection* absl_nonnull reflection_;

  const google::protobuf::FieldDescriptor* absl_nullable repeated_field_desc_;

};

}  // namespace cel::extensions::protobuf_internal

#endif  // THIRD_PARTY_CEL_CPP_EXTENSIONS_PROTOBUF_INTERNAL_QUALIFY_H_