/*
 * 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.
 */

#include "src/trace_processor/dataframe/adhoc_dataframe_builder.h"

#include <cstddef>
#include <cstdint>
#include <optional>
#include <variant>

#include "perfetto/base/logging.h"
#include "perfetto/ext/base/variant.h"
#include "src/trace_processor/containers/string_pool.h"
#include "src/trace_processor/dataframe/impl/flex_vector.h"

namespace perfetto::trace_processor::dataframe {

const char* AdhocDataframeBuilder::ToString(const DataVariant& data) {
  static_assert(std::variant_size_v<DataVariant> == 4);
  switch (data.index()) {
    case base::variant_index<DataVariant, std::nullopt_t>():
      return "NULL";
    case base::variant_index<DataVariant, impl::FlexVector<int64_t>>():
      return "LONG";
    case base::variant_index<DataVariant, impl::FlexVector<double>>():
      return "DOUBLE";
    case base::variant_index<DataVariant, impl::FlexVector<StringPool::Id>>():
      return "STRING";
    default:
      PERFETTO_FATAL("Unexpected data type in column state.");
  }
}

}  // namespace perfetto::trace_processor::dataframe