defmodule Aprsme.PacketConsumer do
  @moduledoc """
  GenStage consumer that batches APRS packets and inserts them into the database
  efficiently to reduce database load.
  """
  use GenStage

  alias Aprsme.Cluster.PacketDistributor
  alias Aprsme.LogSanitizer
  alias Aprsme.Repo

  require Logger

  @type state :: %{
          batch: list(map()),
          batch_length: non_neg_integer(),
          batch_size: integer(),
          batch_timeout: integer(),
          max_batch_size: integer(),
          timer: reference() | nil
        }

  @spec start_link(keyword()) :: GenServer.on_start()
  def start_link(opts \\ []) do
    # Allow unnamed consumers for pool usage
    name = opts[:name]

    if name do
      GenStage.start_link(__MODULE__, opts, name: name)
    else
      GenStage.start_link(__MODULE__, opts)
    end
  end

  @impl true
  def init(opts) do
    batch_size = opts[:batch_size] || 100
    batch_timeout = opts[:batch_timeout] || 1000
    # Maximum batch size to prevent unbounded memory growth
    max_batch_size = opts[:max_batch_size] || 1000

    # Start a timer for batch processing
    timer = Process.send_after(self(), :process_batch, batch_timeout)

    # Extract subscription options if provided
    subscribe_to = opts[:subscribe_to] || [{Aprsme.PacketProducer, max_demand: opts[:max_demand] || 250}]

    {:consumer,
     %{
       batch: [],
       batch_length: 0,
       batch_size: batch_size,
       batch_timeout: batch_timeout,
       max_batch_size: max_batch_size,
       timer: timer
     }, subscribe_to: subscribe_to}
  end

  @impl true
  def handle_events(events, _from, state) do
    handle_batch_update(events, state)
  end

  # Pattern matching for batch handling with optimized list operations
  defp handle_batch_update(events, %{batch: batch, batch_length: batch_length} = state) do
    # Optimize: Keep batch in reverse order for O(1) prepending
    # Only reverse when processing
    new_batch = Enum.reverse(events, batch)
    new_batch_length = batch_length + length(events)

    handle_batch_by_size(new_batch, new_batch_length, state)
  end

  # Pattern matching for different batch size scenarios
  defp handle_batch_by_size(batch, length, %{max_batch_size: max} = state) when length >= max do
    handle_oversized_batch(batch, max, state)
  end

  defp handle_batch_by_size(batch, length, %{batch_size: size} = state) when length >= size do
    handle_full_batch(batch, state)
  end

  defp handle_batch_by_size(batch, new_batch_length, state) do
    handle_partial_batch(batch, new_batch_length, state)
  end

  # Handle oversized batch with pattern matching.
  # Process the oldest `max_size` packets now and keep the rest for the next
  # batch cycle — dropping them here would silently lose packets that the
  # producer has already acknowledged.
  defp handle_oversized_batch(batch, max_size, state) do
    # Reverse once to process in arrival order
    reversed_batch = Enum.reverse(batch)
    {process_now, remainder} = Enum.split(reversed_batch, max_size)

    process_batch(process_now)

    # Keep the remainder queued. Internal batch is stored reversed
    # (newest-at-head) so re-reverse the leftover arrival-order slice.
    carryover_batch = Enum.reverse(remainder)
    carryover_length = length(remainder)

    if carryover_length > 0 do
      Logger.info("Carrying over #{carryover_length} packets past batch-size limit to next cycle",
        batch_info:
          LogSanitizer.log_data(
            carryover_count: carryover_length,
            processed_count: length(process_now)
          )
      )
    end

    new_state =
      state
      |> reset_batch_timer()
      |> Map.put(:batch, carryover_batch)
      |> Map.put(:batch_length, carryover_length)

    {:noreply, [], new_state}
  end

  # Handle full batch
  defp handle_full_batch(batch, state) do
    # Reverse once for processing
    process_batch(Enum.reverse(batch))

    new_state = reset_batch_timer(state)
    {:noreply, [], new_state}
  end

  # Handle partial batch
  defp handle_partial_batch(batch, new_batch_length, state) do
    # Keep batch in reverse order
    {:noreply, [], %{state | batch: batch, batch_length: new_batch_length}}
  end

  # Helper functions with pattern matching
  @spec reset_batch_timer(state()) :: state()
  defp reset_batch_timer(%{timer: nil} = state) do
    new_timer = Process.send_after(self(), :process_batch, state.batch_timeout)
    %{state | batch: [], batch_length: 0, timer: new_timer}
  end

  defp reset_batch_timer(%{timer: timer} = state) do
    Process.cancel_timer(timer)
    new_timer = Process.send_after(self(), :process_batch, state.batch_timeout)
    %{state | batch: [], batch_length: 0, timer: new_timer}
  end

  @impl true
  # Pattern matching for empty batch
  def handle_info(:process_batch, %{batch: []} = state) do
    # Just restart the timer for empty batch
    new_state = start_batch_timer(state)
    {:noreply, [], new_state}
  end

  # Pattern matching for non-empty batch
  def handle_info(:process_batch, %{batch: batch, batch_length: batch_length} = state) when is_list(batch) do
    check_batch_utilization(batch_length, state.max_batch_size)
    # Remember to reverse the batch since we keep it in reverse order
    process_batch(Enum.reverse(batch))

    new_state = start_batch_timer(%{state | batch: [], batch_length: 0})
    {:noreply, [], new_state}
  end

  # Helper to start batch timer
  @spec start_batch_timer(state()) :: state()
  defp start_batch_timer(%{batch_timeout: timeout} = state) do
    timer = Process.send_after(self(), :process_batch, timeout)
    %{state | timer: timer}
  end

  # Batch utilization check using pre-computed length to avoid O(n) traversals
  @spec check_batch_utilization(non_neg_integer(), integer()) :: :ok
  defp check_batch_utilization(batch_length, max_size) when batch_length > max_size * 0.8 do
    Logger.warning("Batch size approaching limit",
      batch_status:
        LogSanitizer.log_data(
          current_size: batch_length,
          max_size: max_size,
          utilization_percent: trunc(batch_length / max_size * 100)
        )
    )
  end

  defp check_batch_utilization(_batch_length, _max_size), do: :ok

  @spec process_batch(list(map())) :: :ok
  defp process_batch(packets) do
    require Logger

    # Monitor memory usage before processing (only this process)
    {:memory, memory_before} = Process.info(self(), :memory)
    start_time = System.monotonic_time(:millisecond)

    # Chunk size optimized for PostgreSQL work_mem=16MB
    # Using smaller batches to reduce memory pressure
    chunk_size = Application.get_env(:aprsme, :packet_pipeline)[:batch_size] || 100

    # Use Stream for memory-efficient processing
    # Process and reduce in one pass to avoid materializing the entire list
    {success_count, error_count} =
      packets
      |> Stream.chunk_every(chunk_size)
      |> Stream.map(&process_chunk/1)
      |> Enum.reduce({0, 0}, fn {success, error}, {total_success, total_error} ->
        {total_success + success, total_error + error}
      end)

    end_time = System.monotonic_time(:millisecond)
    duration = end_time - start_time

    # Monitor memory usage after processing (only this process)
    {:memory, memory_after} = Process.info(self(), :memory)
    memory_diff = memory_after - memory_before

    # Get current process memory info
    process_info = Process.info(self(), [:memory, :heap_size, :total_heap_size])

    # Force garbage collection if memory usage is high
    # 50MB threshold for memory diff (per process)
    # 100MB threshold for process memory
    if memory_diff > 52_428_800 or process_info[:memory] > 104_857_600 do
      :erlang.garbage_collect()

      Logger.warning("High memory usage detected, forced garbage collection",
        memory_info:
          LogSanitizer.log_data(
            memory_diff_bytes: memory_diff,
            process_memory: process_info[:memory],
            heap_size: process_info[:heap_size],
            total_heap_size: process_info[:total_heap_size],
            batch_size: length(packets),
            gc_forced: true
          )
      )
    end

    :telemetry.execute(
      [
        :aprsme,
        :packet_pipeline,
        :batch
      ],
      %{
        count: length(packets),
        success: success_count,
        error: error_count,
        duration_ms: duration,
        memory_diff: memory_diff
      },
      %{}
    )
  end

  @spec process_chunk(list(map())) :: {non_neg_integer(), non_neg_integer()}
  defp process_chunk(packets) do
    # Use Stream for memory-efficient packet preparation
    # Note: truncate_datetimes_to_second is already called inside prepare_packet_for_insert
    # prepare_packet_for_insert returns {insert_attrs, broadcast_info} or nil
    packet_stream =
      packets
      |> Stream.map(&prepare_packet_for_insert/1)
      |> Stream.reject(&is_nil/1)

    # Separate valid and invalid packets using Stream
    {valid_pairs, invalid_count} =
      Enum.reduce(packet_stream, {[], 0}, fn {insert_attrs, _bcast} = pair, {valid_acc, invalid_acc} ->
        if valid_packet?(insert_attrs) do
          {[pair | valid_acc], invalid_acc}
        else
          {valid_acc, invalid_acc + 1}
        end
      end)

    # Reverse to maintain order and split into parallel lists
    valid_pairs = Enum.reverse(valid_pairs)
    valid_inserts = Enum.map(valid_pairs, fn {insert, _bcast} -> insert end)

    # Insert valid packets in batch
    # Optimized for PostgreSQL with synchronous_commit=off
    insert_opts = [
      # Don't return IDs for better performance
      returning: false,
      # Skip conflicts on the composite PK; any other error surfaces to the rescue below
      on_conflict: :nothing,
      conflict_target: [:id, :received_at],
      # Increased timeout for large batches
      timeout: 60_000
    ]

    try do
      {inserted_count, _} = Repo.insert_all(Aprsme.Packet, valid_inserts, insert_opts)

      broadcast_packets_async(Enum.map(valid_pairs, fn {_insert, bcast} -> bcast end))

      {inserted_count, invalid_count}
    rescue
      error ->
        Logger.error("Batch insert failed: #{inspect(error)}, falling back to individual inserts")

        # Fall back to individual inserts so partial success is possible
        {fallback_inserted, fallback_bcasts} = insert_individually(valid_pairs)

        # Broadcast whatever was successfully inserted
        if fallback_bcasts != [] do
          broadcast_packets_async(fallback_bcasts)
        end

        {fallback_inserted, invalid_count + length(valid_pairs) - fallback_inserted}
    end
  end

  # Fall back to inserting packets one at a time when batch insert fails.
  # Returns {inserted_count, list_of_broadcast_infos_for_successes}.
  @spec insert_individually(list({map(), map()})) :: {non_neg_integer(), list(map())}
  defp insert_individually(pairs) do
    Enum.reduce(pairs, {0, []}, fn {insert_attrs, bcast}, {count, inserted} ->
      try do
        changeset = Aprsme.Packet.changeset(%Aprsme.Packet{}, insert_attrs)

        case Repo.insert(changeset, on_conflict: :nothing, conflict_target: [:id, :received_at]) do
          {:ok, _record} ->
            {count + 1, [bcast | inserted]}

          {:error, _changeset} ->
            {count, inserted}
        end
      rescue
        error ->
          Logger.error("Individual insert failed: #{inspect(error)}")
          {count, inserted}
      end
    end)
  end

  # Broadcast packets asynchronously using supervised task pool.
  # Failures here were previously silent — the Task died, the broadcast never
  # reached subscribers, and there was no log trail. Rescue and log so
  # operational issues (PubSub down, serialization bugs) are observable.
  defp broadcast_packets_async(bcasts) do
    fun = fn ->
      cluster_enabled = Application.get_env(:aprsme, :cluster_enabled, false)

      Enum.each(bcasts, fn bcast ->
        try do
          broadcast_single_packet(bcast, cluster_enabled)
        rescue
          error ->
            Logger.error("Packet broadcast failed: #{inspect(error)}",
              broadcast_error:
                LogSanitizer.log_data(
                  error: Exception.message(error),
                  routing_callsign: Map.get(bcast, :routing_callsign)
                )
            )
        end
      end)
    end

    if test_env?() do
      fun.()
      {:ok, self()}
    else
      Aprsme.BroadcastTaskSupervisor.async_execute(fun)
    end
  end

  defp broadcast_single_packet(
         %{payload: packet, routing_callsign: routing_callsign, has_weather: has_weather?},
         cluster_enabled
       ) do
    if cluster_enabled do
      PacketDistributor.distribute_packet(packet)
    else
      Aprsme.StreamingPacketsPubSub.broadcast_packet(packet)
      Aprsme.SpatialPubSub.broadcast_packet(packet)
    end

    broadcast_legacy_topics(packet, routing_callsign, has_weather?)
  end

  # Replaces the `aprs_packets` pg_notify path (removed as a DB trigger).
  defp broadcast_legacy_topics(packet, routing_callsign, has_weather?) do
    Phoenix.PubSub.broadcast(Aprsme.PubSub, "postgres:aprsme_packets", {:postgres_packet, packet})

    if is_binary(routing_callsign) and routing_callsign != "" do
      Phoenix.PubSub.broadcast(Aprsme.PubSub, "packets:#{routing_callsign}", {:postgres_packet, packet})

      if has_weather? do
        Phoenix.PubSub.broadcast(Aprsme.PubSub, "weather:#{routing_callsign}", {:weather_packet, packet})
      end
    end
  end

  defp test_env? do
    Application.get_env(:aprsme, :env) == :test
  end

  defp prepare_packet_for_insert(packet_data) do
    # Reuse the received_at stamped in Is.dispatch; fall back if missing.
    # packet_data is already a plain map — Is.dispatch ran struct_to_map before submitting.
    current_time =
      case Map.get(packet_data, :received_at) do
        %DateTime{} = dt -> DateTime.truncate(dt, :microsecond)
        _ -> DateTime.truncate(DateTime.utc_now(), :microsecond)
      end

    attrs = Map.put(packet_data, :received_at, current_time)

    # Extract additional data from the parsed packet including raw packet
    attrs = Aprsme.Packet.extract_additional_data(attrs, attrs[:raw_packet] || "")

    # Detect and set item/object fields
    attrs = detect_item_or_object(attrs)

    # Sanitize packet data to prevent database field overflow
    attrs = Aprsme.PacketSanitizer.sanitize_packet(attrs)

    # Normalize data_type to string if it's an atom
    attrs = normalize_data_type(attrs)

    # Apply the same processing as the original store_packet function.
    # `enriched` holds everything needed for both insert and broadcast;
    # we pre-build the broadcast payload once so the async broadcast path
    # doesn't have to Map.drop/Map.merge/pick-identifier per packet.
    enriched =
      attrs
      |> convert_coordinate_field_names()
      |> convert_field_names()
      |> normalize_packet_attrs()
      |> set_received_at()
      |> patch_lat_lon_from_data_extended()
      |> then(fn attrs ->
        {lat, lon} = extract_position(attrs)
        set_lat_lon(attrs, lat, lon)
      end)
      |> normalize_ssid()
      |> then(fn attrs ->
        Map.put(attrs, :device_identifier, Aprsme.DeviceParser.extract_device_identifier(attrs))
      end)
      |> sanitize_packet_strings()
      |> create_location_geometry()
      |> Map.put(:inserted_at, current_time)
      |> Map.put(:updated_at, current_time)
      |> Map.put(:id, Ecto.UUID.generate())
      |> Map.delete("id")
      |> Map.delete(:data_extended)
      |> normalize_numeric_types()
      |> truncate_datetimes_to_second()
      |> set_has_weather()

    insert_attrs = remove_non_schema_fields(enriched)
    bcast_info = build_broadcast_info(enriched)

    {insert_attrs, bcast_info}
  rescue
    error ->
      Logger.error("Failed to prepare packet for batch insert: #{inspect(error)}")
      nil
  end

  # Pre-build the broadcast payload and routing info once per packet.
  # `:sender` is replaced with the display identifier (object/item name)
  # while `routing_callsign` preserves the original sender for topic routing.
  defp build_broadcast_info(enriched) do
    identifier =
      enriched[:object_name] || enriched[:item_name] || enriched[:sender]

    payload =
      enriched
      |> Map.drop([:location, :inserted_at, :updated_at])
      |> Map.put(:sender, identifier)
      |> Map.put(:latitude, enriched[:lat])
      |> Map.put(:longitude, enriched[:lon])

    original_sender = enriched[:sender] || enriched[:base_callsign]

    routing_callsign =
      if is_binary(original_sender) and original_sender != "" do
        original_sender |> String.trim() |> String.upcase()
      end

    %{
      payload: payload,
      routing_callsign: routing_callsign,
      has_weather: enriched[:has_weather] == true
    }
  end

  # Compute has_weather from any populated weather field (replaces DB trigger)
  defp set_has_weather(attrs) do
    has_weather? =
      Enum.any?(Aprsme.EncodingUtils.weather_fields(), fn field ->
        not is_nil(Map.get(attrs, field))
      end)

    Map.put(attrs, :has_weather, has_weather?)
  end

  # Helper function to remove fields that exist in parser output but not in database schema
  defp remove_non_schema_fields(attrs) do
    # Use whitelist approach - only keep fields that are in our schema
    Aprsme.PacketFieldWhitelist.filter_fields(attrs)
  end

  defp valid_packet?(nil), do: false
  defp valid_packet?(%{sender: sender}) when is_binary(sender) and byte_size(sender) > 0, do: true
  defp valid_packet?(_), do: false

  # Detect if packet is an item or object and set appropriate fields
  defp detect_item_or_object(attrs) do
    cond do
      object_packet?(attrs) -> apply_object_fields(attrs)
      item_packet?(attrs) -> apply_item_fields(attrs)
      true -> attrs
    end
  end

  defp object_packet?(attrs) do
    info_field = get_in(attrs, [:data, "information_field"])

    attrs[:data_type] == "object" or attrs["data_type"] == "object" or
      (is_binary(info_field) and String.starts_with?(info_field, ";"))
  end

  defp item_packet?(attrs) do
    Map.has_key?(attrs, :itemname) or Map.has_key?(attrs, "itemname")
  end

  defp apply_object_fields(attrs) do
    info_field = get_in(attrs, [:data, "information_field"])

    object_name =
      extract_object_name(attrs) ||
        extract_object_name_from_info_field(info_field)

    attrs
    |> Map.put(:object_name, object_name)
    |> Map.put(:is_object, true)
    |> Map.delete(:itemname)
    |> Map.delete("itemname")
  end

  defp apply_item_fields(attrs) do
    item_name = Map.get(attrs, :itemname) || Map.get(attrs, "itemname")

    attrs
    |> Map.put(:item_name, item_name)
    |> Map.put(:is_item, true)
    |> Map.delete(:itemname)
    |> Map.delete("itemname")
  end

  defp extract_object_name(attrs) do
    case attrs[:data_extended] do
      %{name: name} when is_binary(name) -> name
      %{"name" => name} when is_binary(name) -> name
      _ -> nil
    end
  end

  defp extract_object_name_from_info_field(nil), do: nil

  defp extract_object_name_from_info_field(info_field) do
    # Object format: ;OBJECTNAM*DDHHMMz... or ;OBJECTNAM_DDHHMMz... (killed)
    # Object names are 9 printable ASCII characters followed by * (alive) or _ (killed)
    case Regex.run(~r/^;(.{9})[*_]/, info_field) do
      [_, name] -> String.trim(name)
      _ -> nil
    end
  end

  # Convert field names that don't match our schema
  defp convert_field_names(attrs) do
    attrs
    |> then(fn a ->
      # Convert aprs_messaging? to aprs_messaging
      case Map.get(a, :aprs_messaging?) || Map.get(a, "aprs_messaging?") do
        nil ->
          a

        value ->
          a
          |> Map.put(:aprs_messaging, value)
          |> Map.delete(:aprs_messaging?)
          |> Map.delete("aprs_messaging?")
      end
    end)
    |> then(fn a ->
      # Convert timestamp from integer to string if needed
      case Map.get(a, :timestamp) do
        timestamp when is_integer(timestamp) ->
          Map.put(a, :timestamp, Integer.to_string(timestamp))

        _ ->
          a
      end
    end)
  end

  # Convert latitude/longitude to lat/lon if present at top level
  defp convert_coordinate_field_names(attrs) do
    attrs
    |> then(fn a ->
      case Map.get(a, :latitude) do
        nil -> a
        lat -> a |> Map.put(:lat, lat) |> Map.delete(:latitude)
      end
    end)
    |> then(fn a ->
      case Map.get(a, :longitude) do
        nil -> a
        lon -> a |> Map.put(:lon, lon) |> Map.delete(:longitude)
      end
    end)
  end

  # Helper functions copied from Packets module for consistency
  defp normalize_packet_attrs(attrs) do
    attrs
    |> Map.put_new(:base_callsign, attrs[:sender])
    |> Map.put_new(:data_type, "unknown")
    |> Map.put_new(:destination, "")
    |> Map.put_new(:path, "")
    |> Map.put_new(:ssid, "")
    |> Map.put_new(:data_extended, %{})
  end

  defp set_received_at(attrs) do
    received_at = attrs[:received_at] || DateTime.utc_now()
    Map.put(attrs, :received_at, received_at)
  end

  defp patch_lat_lon_from_data_extended(attrs) do
    case attrs[:data_extended] do
      %{latitude: lat, longitude: lon} when not is_nil(lat) and not is_nil(lon) ->
        attrs
        |> Map.put(:lat, lat)
        |> Map.put(:lon, lon)
        |> Map.put(:has_position, true)

      _ ->
        attrs
    end
  end

  defp extract_position(packet_data) do
    if not is_nil(packet_data[:lat]) and not is_nil(packet_data[:lon]) do
      {Aprsme.EncodingUtils.to_float(packet_data.lat), Aprsme.EncodingUtils.to_float(packet_data.lon)}
    else
      extract_position_from_data_extended(packet_data[:data_extended])
    end
  end

  defp extract_position_from_data_extended(nil), do: {nil, nil}

  defp extract_position_from_data_extended(data_extended) when is_map(data_extended) do
    if has_standard_position?(data_extended) do
      extract_standard_position(data_extended)
    else
      extract_position_from_data_extended_case(data_extended)
    end
  end

  defp extract_position_from_data_extended(_), do: {nil, nil}

  defp has_standard_position?(data_extended) when is_map(data_extended) and not is_struct(data_extended) do
    not is_nil(data_extended[:latitude]) and not is_nil(data_extended[:longitude])
  end

  defp has_standard_position?(_), do: false

  defp extract_standard_position(data_extended) when is_map(data_extended) and not is_struct(data_extended) do
    {Aprsme.EncodingUtils.to_float(data_extended[:latitude]), Aprsme.EncodingUtils.to_float(data_extended[:longitude])}
  end

  defp extract_standard_position(_), do: {nil, nil}

  defp extract_position_from_data_extended_case(data_extended) do
    lat = extract_lat_from_ext_map(data_extended)
    lon = extract_lon_from_ext_map(data_extended)
    {Aprsme.EncodingUtils.to_float(lat), Aprsme.EncodingUtils.to_float(lon)}
  end

  defp extract_lat_from_ext_map(ext_map) do
    ext_map[:latitude] || ext_map["latitude"] ||
      (Map.has_key?(ext_map, :position) &&
         (ext_map[:position][:latitude] || ext_map[:position]["latitude"])) ||
      (Map.has_key?(ext_map, "position") &&
         (ext_map["position"][:latitude] || ext_map["position"]["latitude"]))
  end

  defp extract_lon_from_ext_map(ext_map) do
    ext_map[:longitude] || ext_map["longitude"] ||
      (Map.has_key?(ext_map, :position) &&
         (ext_map[:position][:longitude] || ext_map[:position]["longitude"])) ||
      (Map.has_key?(ext_map, "position") &&
         (ext_map["position"][:longitude] || ext_map["position"]["longitude"]))
  end

  # extract_position already ran to_float; lat/lon are floats or nil here.
  # Round and store whatever we have; range validation happens in
  # create_location_geometry/1 where it controls Geo.Point construction.
  defp set_lat_lon(attrs, lat, lon) do
    attrs
    |> Map.put(:lat, round_coord(lat))
    |> Map.put(:lon, round_coord(lon))
    |> Map.put(:has_position, is_float(lat) and is_float(lon))
  end

  defp round_coord(n) when is_float(n), do: Float.round(n, 6)
  defp round_coord(_), do: nil

  # Build the PostGIS point only for in-range coordinates.
  # Must run AFTER sanitize_packet_strings so the struct survives intact.
  defp create_location_geometry(%{lat: lat, lon: lon} = attrs)
       when is_float(lat) and is_float(lon) and lat >= -90.0 and lat <= 90.0 and lon >= -180.0 and lon <= 180.0 do
    Map.put(attrs, :location, %Geo.Point{coordinates: {lon, lat}, srid: 4326})
  end

  defp create_location_geometry(attrs), do: attrs

  defp normalize_ssid(attrs) do
    case Map.get(attrs, :ssid) do
      nil -> attrs
      ssid -> Map.put(attrs, :ssid, to_string(ssid))
    end
  end

  defp sanitize_packet_strings(value), do: Aprsme.EncodingUtils.sanitize_packet_strings(value)

  defp normalize_data_type(attrs), do: Aprsme.EncodingUtils.normalize_data_type(attrs)

  defp truncate_datetimes_to_second(%DateTime{} = dt), do: DateTime.truncate(dt, :second)
  defp truncate_datetimes_to_second({:ok, %DateTime{} = dt}), do: DateTime.truncate(dt, :second)
  defp truncate_datetimes_to_second({:error, _reason}), do: nil

  defp truncate_datetimes_to_second(term) when is_map(term) and not is_struct(term) do
    Map.new(term, fn {k, v} -> {k, truncate_datetimes_to_second(v)} end)
  end

  defp truncate_datetimes_to_second(list) when is_list(list), do: Enum.map(list, &truncate_datetimes_to_second/1)
  defp truncate_datetimes_to_second(other), do: other

  defp normalize_numeric_types(attrs) do
    # Convert integer values to floats for float fields
    float_fields = [
      :temperature,
      :humidity,
      :wind_speed,
      :wind_gust,
      :pressure,
      :rain_1h,
      :rain_24h,
      :rain_since_midnight,
      :snow,
      :speed,
      :altitude
    ]

    Enum.reduce(float_fields, attrs, fn field, acc ->
      case Map.get(acc, field) do
        value when is_integer(value) -> Map.put(acc, field, value * 1.0)
        _ -> acc
      end
    end)
  end
end