defmodule Aprsme.Packets do
  @moduledoc """
  The Packets context.
  """

  @behaviour Aprsme.PacketsBehaviour

  import Ecto.Query, warn: false

  alias Aprs.Types.MicE
  alias Aprsme.BadPacket
  alias Aprsme.Packet
  alias Aprsme.Packets.PreparedQueries
  alias Aprsme.Packets.QueryBuilder
  alias Aprsme.Repo

  require Logger

  @doc """
  Stores a packet in the database.

  ## Parameters
    * `packet_data` - Map containing packet data to be stored
  """
  @spec store_packet(map()) :: {:ok, struct()} | {:error, :validation_error | :storage_exception}
  def store_packet(packet_data) do
    require Logger

    with {:ok, sanitized_data} <- sanitize_packet_data(packet_data),
         {:ok, packet_attrs} <- build_packet_attrs(sanitized_data),
         {:ok, packet} <- insert_packet(packet_attrs, packet_data) do
      {:ok, packet}
    else
      {:error, {:validation_error, message}} ->
        Logger.error("Failed to store packet for #{inspect(packet_data[:sender])}: #{message}")
        store_bad_packet(packet_data, %{message: message, type: "ValidationError"})
        {:error, :validation_error}

      {:error, {:storage_exception, exception}} ->
        Logger.error("Storage exception for #{inspect(packet_data[:sender])}: #{inspect(exception)}")
        store_bad_packet(packet_data, %{message: inspect(exception), type: "StorageException"})
        {:error, :storage_exception}

      {:error, reason} = error ->
        Logger.error("Failed to store packet for #{inspect(packet_data[:sender])}: #{inspect(reason)}")
        store_bad_packet(packet_data, reason)
        error
    end
  end

  # Pattern matching for sanitization
  defp sanitize_packet_data(packet_data) do
    {:ok, Aprsme.EncodingUtils.sanitize_packet(packet_data)}
  rescue
    error -> {:error, {:sanitization_failed, error}}
  end

  # Build packet attributes with pipeline
  defp build_packet_attrs(sanitized_data) do
    raw_packet = get_raw_packet(sanitized_data)

    attrs =
      sanitized_data
      |> Packet.extract_additional_data(raw_packet)
      |> normalize_packet_attrs()
      |> set_received_at()
      |> patch_lat_lon_from_data_extended()
      |> apply_position_data()
      |> normalize_ssid()
      |> apply_device_identifier(sanitized_data)

    {:ok, attrs}
  rescue
    error -> {:error, {:build_attrs_failed, error}}
  end

  # Pattern matching for raw packet extraction
  defp get_raw_packet(%{raw_packet: raw}) when is_binary(raw), do: raw
  defp get_raw_packet(%{"raw_packet" => raw}) when is_binary(raw), do: raw
  defp get_raw_packet(_), do: ""

  # Apply position data using pattern matching
  defp apply_position_data(attrs) do
    case extract_position(attrs) do
      {nil, nil} -> attrs
      {lat, lon} -> set_lat_lon(attrs, lat, lon)
    end
  end

  # Apply device identifier with pattern matching
  defp apply_device_identifier(attrs, original_data) do
    case Aprsme.DeviceParser.extract_device_identifier(original_data) do
      nil ->
        # Fallback to destination
        Map.put(attrs, :device_identifier, Map.get(attrs, :destination))

      device_id ->
        Map.put(attrs, :device_identifier, get_canonical_device_identifier(device_id))
    end
  end

  defp normalize_packet_attrs(packet_data) do
    case_result =
      case packet_data do
        %Packet{} = packet ->
          packet
          |> Map.from_struct()
          |> Map.delete(:__meta__)

        %{} ->
          packet_data
      end

    case_result
    |> Aprsme.EncodingUtils.sanitize_packet()
    |> normalize_data_type()
  end

  defp normalize_data_type(attrs) do
    Aprsme.EncodingUtils.normalize_data_type(attrs)
  end

  defp set_received_at(attrs) do
    current_time = DateTime.truncate(DateTime.utc_now(), :microsecond)
    Map.put(attrs, :received_at, current_time)
  end

  # Pattern matching with guards for cleaner code
  defp patch_lat_lon_from_data_extended(%{data_extended: %{} = ext} = attrs) do
    ext_map = normalize_to_map(ext)

    with lat when not is_nil(lat) <- extract_lat_from_ext_map(ext_map),
         lon when not is_nil(lon) <- extract_lon_from_ext_map(ext_map),
         {:ok, lat_decimal} <- to_decimal_safe(lat),
         {:ok, lon_decimal} <- to_decimal_safe(lon) do
      attrs
      |> Map.put(:lat, lat_decimal)
      |> Map.put(:lon, lon_decimal)
    else
      _ -> attrs
    end
  end

  defp patch_lat_lon_from_data_extended(attrs), do: attrs

  # Helper to normalize struct or map
  defp normalize_to_map(%{__struct__: _} = struct), do: Map.from_struct(struct)
  defp normalize_to_map(map) when is_map(map), do: map

  # Safe decimal conversion with pattern matching
  defp to_decimal_safe(nil), do: {:error, :nil_value}

  defp to_decimal_safe(value) do
    case to_decimal(value) do
      nil -> {:error, :conversion_failed}
      decimal -> {:ok, decimal}
    end
  end

  # Pattern matching for coordinate extraction
  defp extract_lat_from_ext_map(ext_map) do
    extract_coordinate(ext_map, :latitude)
  end

  defp extract_lon_from_ext_map(ext_map) do
    extract_coordinate(ext_map, :longitude)
  end

  # Unified coordinate extraction with pattern matching
  defp extract_coordinate(%{} = map, coord_type) when coord_type in [:latitude, :longitude] do
    coord_string = Atom.to_string(coord_type)

    find_coordinate_value(map, coord_type) || find_coordinate_value(map, coord_string)
  end

  defp extract_coordinate(_, _), do: nil

  # Pattern matching for direct coordinate access
  defp find_coordinate_value(%{latitude: lat}, :latitude) when not is_nil(lat), do: lat
  defp find_coordinate_value(%{longitude: lon}, :longitude) when not is_nil(lon), do: lon
  defp find_coordinate_value(%{"latitude" => lat}, "latitude") when not is_nil(lat), do: lat
  defp find_coordinate_value(%{"longitude" => lon}, "longitude") when not is_nil(lon), do: lon

  # Pattern matching for nested position access
  defp find_coordinate_value(%{position: %{latitude: lat}}, :latitude) when not is_nil(lat), do: lat
  defp find_coordinate_value(%{position: %{longitude: lon}}, :longitude) when not is_nil(lon), do: lon
  defp find_coordinate_value(%{position: %{"latitude" => lat}}, :latitude) when not is_nil(lat), do: lat
  defp find_coordinate_value(%{position: %{"longitude" => lon}}, :longitude) when not is_nil(lon), do: lon
  defp find_coordinate_value(%{"position" => %{latitude: lat}}, "latitude") when not is_nil(lat), do: lat
  defp find_coordinate_value(%{"position" => %{longitude: lon}}, "longitude") when not is_nil(lon), do: lon
  defp find_coordinate_value(%{"position" => %{"latitude" => lat}}, "latitude") when not is_nil(lat), do: lat
  defp find_coordinate_value(%{"position" => %{"longitude" => lon}}, "longitude") when not is_nil(lon), do: lon

  defp find_coordinate_value(_, _), do: nil

  defp set_lat_lon(attrs, lat, lon) do
    # Optimize: avoid creating anonymous function on each call
    attrs
    |> Map.put(:lat, round_coordinate(lat))
    |> Map.put(:lon, round_coordinate(lon))
  end

  # Moved out as a separate function to avoid recreating on each call
  defp round_coordinate(nil), do: nil
  defp round_coordinate(%Decimal{} = d), do: Decimal.round(d, 6)
  defp round_coordinate(n) when is_float(n), do: Float.round(n, 6)
  defp round_coordinate(n) when is_integer(n), do: n * 1.0

  defp round_coordinate(n) when is_binary(n) do
    case Float.parse(n) do
      {f, _} -> Float.round(f, 6)
      :error -> nil
    end
  end

  defp round_coordinate(_), do: nil

  # Pattern matching for SSID normalization
  defp normalize_ssid(%{ssid: nil} = attrs), do: attrs
  defp normalize_ssid(%{ssid: ssid} = attrs) when is_binary(ssid), do: attrs
  defp normalize_ssid(%{ssid: ssid} = attrs), do: Map.put(attrs, :ssid, to_string(ssid))
  defp normalize_ssid(attrs), do: attrs

  defp insert_packet(attrs, _packet_data) do
    # Ensure data_extended is properly sanitized before insertion
    attrs =
      if attrs[:data_extended] do
        sanitized_extended = Aprsme.EncodingUtils.sanitize_data_extended(attrs[:data_extended])
        # Double-check all values are sanitized
        # Only do additional sanitization for plain maps, not structs
        sanitized_extended =
          if is_struct(sanitized_extended) do
            sanitized_extended
          else
            Enum.reduce(sanitized_extended, %{}, fn {k, v}, acc ->
              sanitized_value = if is_binary(v), do: Aprsme.EncodingUtils.sanitize_string(v), else: v
              Map.put(acc, k, sanitized_value)
            end)
          end

        Map.put(attrs, :data_extended, sanitized_extended)
      else
        attrs
      end

    # Debug log to see what we're trying to insert
    if attrs[:data_extended] do
      require Logger

      Logger.debug("Final data_extended before insert: #{inspect(attrs[:data_extended], binaries: :as_binaries)}")
    end

    case %Packet{} |> Packet.changeset(attrs) |> Repo.insert() do
      {:ok, packet} ->
        # Invalidate cache for this packet's callsign
        if Map.has_key?(attrs, :sender) do
          # Cache invalidation removed - no longer using CachedQueries
        end

        {:ok, packet}

      {:error, changeset} ->
        error_message =
          Enum.map_join(changeset.errors, ", ", fn {field, {msg, _}} -> "#{field}: #{msg}" end)

        {:error, {:validation_error, error_message}}
    end
  rescue
    exception ->
      {:error, {:storage_exception, exception}}
  end

  @doc """
  Stores a bad packet in the database.

  ## Parameters
    * `packet_data` - The original packet data that failed to parse
    * `error` - The error that occurred during parsing
  """
  @spec store_bad_packet(map() | String.t(), any()) ::
          {:ok, struct()} | {:error, Ecto.Changeset.t()}
  def store_bad_packet(packet_data, error) when is_binary(packet_data) do
    error_type =
      case error do
        %{type: type} -> type
        %{__struct__: struct} -> struct |> to_string() |> String.replace("Elixir.", "")
        _ -> "UnknownError"
      end

    error_message =
      case error do
        %{message: message} -> message
        %{__struct__: _} -> Exception.message(error)
        _ -> inspect(error)
      end

    %BadPacket{}
    |> BadPacket.changeset(%{
      raw_packet: Aprsme.EncodingUtils.sanitize_string(packet_data),
      error_message: error_message,
      error_type: error_type,
      attempted_at: DateTime.utc_now()
    })
    |> Repo.insert()
  end

  def store_bad_packet(packet_data, error) when is_map(packet_data) do
    error_type =
      case error do
        %{type: type} -> type
        %{__struct__: struct} -> struct |> to_string() |> String.replace("Elixir.", "")
        _ -> "UnknownError"
      end

    error_message =
      case error do
        %{message: message} -> message
        %{__struct__: _} -> Exception.message(error)
        _ -> inspect(error)
      end

    %BadPacket{}
    |> BadPacket.changeset(%{
      raw_packet: packet_data[:raw_packet] || packet_data["raw_packet"] || inspect(packet_data),
      error_message: error_message,
      error_type: error_type,
      attempted_at: DateTime.utc_now()
    })
    |> Repo.insert()
  end

  # Extracts position data from packet, checking various possible locations
  defp extract_position(packet_data) do
    # Check for lat/lon at top level
    if not is_nil(packet_data[:lat]) and not is_nil(packet_data[:lon]) do
      {to_float(packet_data.lat), 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
    {to_float(data_extended[:latitude]), to_float(data_extended[:longitude])}
  end

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

  defp extract_position_from_data_extended_case(data_extended) do
    case data_extended do
      %{__struct__: MicE} = mic_e ->
        extract_position_from_mic_e_struct(mic_e)

      %{__struct__: Aprs.Types.ParseError} ->
        # ParseError structs don't contain position data and don't implement Access behavior
        {nil, nil}

      _ ->
        extract_position_from_mic_e(data_extended)
    end
  end

  defp extract_position_from_mic_e_struct(%{__struct__: MicE} = mic_e) do
    # Use Access behavior for MicE struct which implements it
    lat = mic_e[:latitude]
    lon = mic_e[:longitude]

    if is_number(lat) and is_number(lon) do
      {lat, lon}
    else
      {nil, nil}
    end
  end

  defp extract_position_from_mic_e(%{
         lat_degrees: lat_deg,
         lat_minutes: lat_min,
         lat_direction: lat_dir,
         lon_degrees: lon_deg,
         lon_minutes: lon_min,
         lon_direction: lon_dir
       })
       when is_number(lat_deg) and is_number(lat_min) and is_number(lon_deg) and is_number(lon_min) do
    lat = apply_direction(lat_deg + lat_min / 60.0, lat_dir, :south)
    lon = apply_direction(lon_deg + lon_min / 60.0, lon_dir, :west)
    {lat, lon}
  end

  defp extract_position_from_mic_e(_data_extended), do: {nil, nil}

  defp apply_direction(value, direction, negative_direction) when direction == negative_direction, do: -value
  defp apply_direction(value, _direction, _negative_direction), do: value

  # Pattern matching for canonical device identifier lookup
  defp get_canonical_device_identifier(device_identifier) when is_binary(device_identifier) do
    case Aprsme.DeviceIdentification.lookup_device_by_identifier(device_identifier) do
      %{identifier: canonical_id} when is_binary(canonical_id) -> canonical_id
      _ -> device_identifier
    end
  end

  defp get_canonical_device_identifier(device_identifier), do: to_string(device_identifier)

  @doc """
  Gets packets for replay.

  ## Parameters
    * `opts` - Map of options for filtering and pagination:
      * `:lat` - Latitude for center point filtering
      * `:lon` - Longitude for center point filtering
      * `:radius` - Radius in kilometers for filtering
      * `:callsign` - Filter by callsign
      * `:region` - Filter by region
      * `:start_time` - Start time for replay (DateTime)
      * `:end_time` - End time for replay (DateTime)
      * `:limit` - Maximum number of packets to return
      * `:page` - Page number for pagination
  """
  @impl true
  def get_packets_for_replay(opts \\ %{}) do
    limit = Map.get(opts, :limit, 1000)
    bounds = Map.get(opts, :bounds)

    query =
      from(p in Packet)
      |> QueryBuilder.with_position()
      |> QueryBuilder.with_time_range(opts)
      |> QueryBuilder.maybe_filter_region(opts)
      |> maybe_filter_by_callsign(opts)
      |> maybe_filter_by_bounds(bounds)
      |> QueryBuilder.chronological()
      |> QueryBuilder.paginate(limit)
      |> QueryBuilder.with_coordinates()

    Repo.all(query)
  end

  defp maybe_filter_by_callsign(query, %{callsign: callsign}) when not is_nil(callsign) do
    QueryBuilder.for_callsign(query, callsign)
  end

  defp maybe_filter_by_callsign(query, _), do: query

  defp maybe_filter_by_bounds(query, bounds) when is_list(bounds) and length(bounds) == 4 do
    QueryBuilder.within_bounds(query, bounds)
  end

  defp maybe_filter_by_bounds(query, _), do: query

  @doc """
  Gets historical packet count for a map area.
  """
  @impl true
  @spec get_historical_packet_count(map()) :: non_neg_integer()
  def get_historical_packet_count(opts \\ %{}) do
    bounds = Map.get(opts, :bounds)

    query =
      from(p in Packet)
      |> QueryBuilder.with_position()
      |> QueryBuilder.with_time_range(opts)
      |> QueryBuilder.maybe_filter_region(opts)
      |> maybe_filter_by_callsign(opts)
      |> maybe_filter_by_bounds(bounds)
      |> select(count())

    case Repo.one(query) do
      nil -> 0
      count when is_integer(count) -> count
      _ -> 0
    end
  rescue
    _ -> 0
  end

  @doc """
  Gets recent packets for initial map load.
  This uses an efficient query pattern for the most common use case.
  """
  @impl true
  @spec get_recent_packets(map()) :: [struct()]
  def get_recent_packets(opts \\ %{}) do
    require Logger

    Logger.debug("Packets.get_recent_packets called with opts: #{inspect(opts)}")

    # Use hours_back from opts if provided, otherwise default to 24 hours
    hours_back = Map.get(opts, :hours_back, 24)
    time_ago = DateTime.add(DateTime.utc_now(), -hours_back * 3600, :second)
    limit = Map.get(opts, :limit, 200)
    offset = Map.get(opts, :offset, 0)

    # Build base query with time filter
    # Only filter by position if not tracking a specific callsign
    # Also normalize callsign to handle edge cases
    callsign = opts[:callsign]
    normalized_callsign = if is_binary(callsign), do: String.trim(callsign), else: ""

    base_query =
      if normalized_callsign == "" do
        # For general map view, only show packets with positions
        from(p in Packet,
          where: p.has_position == true,
          where: p.received_at >= ^time_ago
        )
      else
        # When tracking a callsign, show all their packets regardless of position
        from(p in Packet,
          where: p.received_at >= ^time_ago
        )
      end

    # Apply spatial and other filters BEFORE limiting
    # This ensures we get the most recent packets within the specified bounds
    bounds = Map.get(opts, :bounds)

    query =
      base_query
      |> QueryBuilder.maybe_filter_region(opts)
      |> maybe_filter_by_callsign(opts)
      |> maybe_filter_by_bounds(bounds)
      |> order_by(desc: :received_at)
      |> limit(^limit)
      |> offset(^offset)
      |> QueryBuilder.with_coordinates()

    result = Repo.all(query)
    Logger.debug("Packets.get_recent_packets returning #{length(result)} packets")
    result
  end

  @doc """
  Gets the closest stations to a given point.
  Uses PostGIS spatial indexes for efficient querying.
  Returns only the most recent packet per callsign, ordered by distance.
  """
  @impl true
  @spec get_nearby_stations(float(), float(), String.t() | nil, map()) :: [struct()]
  def get_nearby_stations(lat, lon, exclude_callsign \\ nil, opts \\ %{}) do
    # Use KNN (K-nearest neighbors) query for better performance
    results = PreparedQueries.get_nearby_stations_knn(lat, lon, exclude_callsign, opts)

    # Convert results back to Packet structs if needed
    Enum.map(results, fn result ->
      # If result is already a Packet struct, return it
      if is_struct(result, Packet) do
        result
      else
        # Otherwise, create a minimal Packet struct from the map
        %Packet{
          sender: result.callsign,
          base_callsign: result.base_callsign,
          lat: result.lat,
          lon: result.lon,
          received_at: result.received_at,
          symbol_table_id: result.symbol_table_id,
          symbol_code: result.symbol_code,
          comment: result.comment
        }
      end
    end)
  end

  @doc """
  Gets weather packets for a specific callsign within a time range.
  This is optimized for weather queries by filtering at the database level.
  """
  @impl true
  @spec get_weather_packets(String.t(), DateTime.t(), DateTime.t(), map()) :: [struct()]
  def get_weather_packets(callsign, start_time, end_time, opts \\ %{}) do
    opts =
      Map.merge(opts, %{
        callsign: callsign,
        start_time: start_time,
        end_time: end_time,
        limit: Map.get(opts, :limit, 500)
      })

    opts
    |> QueryBuilder.weather_packets()
    |> QueryBuilder.with_coordinates()
    |> Repo.all()
  end

  # Filter for weather packets at the database level

  @doc """
  Retrieves a continuous stream of stored packets for replay in chronological order.

  This function returns a Stream that can be used to process packets in chronological
  order, preserving the timing between packets.

  ## Parameters
    * `opts` - The same options as `get_packets_for_replay/1`
      * `:playback_speed` - Speed multiplier (1.0 = real-time, 2.0 = 2x speed, etc.)

  ## Returns
    * Stream of packets with timing information
  """
  @impl true
  def stream_packets_for_replay(opts \\ %{}) do
    packets = get_packets_for_replay(opts)
    playback_speed = Map.get(opts, :playback_speed, 1.0)

    # Return a stream that emits packets with their original timing
    Stream.unfold({packets, nil}, fn
      {[], _} ->
        nil

      {[packet | rest], nil} ->
        {{0, packet}, {rest, packet}}

      {[next | rest], prev} ->
        # Calculate delay between packets in milliseconds, then convert to seconds
        delay_ms = DateTime.diff(next.received_at, prev.received_at, :millisecond)
        adjusted_delay = delay_ms / (playback_speed * 1000)
        {{adjusted_delay, next}, {rest, next}}
    end)
  end

  @doc """
  Gets the total count of stored packets in the database.
  Uses the efficient packet_counters table with triggers for O(1) performance.
  """
  @spec get_total_packet_count() :: non_neg_integer()
  def get_total_packet_count do
    # Use the PostgreSQL function for instant count retrieval
    case Repo.query("SELECT get_packet_count()", []) do
      {:ok, %{rows: [[count]]}} when is_integer(count) ->
        count

      {:ok, %{rows: [[nil]]}} ->
        # Fallback to actual count if counter is not initialized
        Repo.one(from p in Packet, select: count(p.id)) || 0

      {:error, _} ->
        # Try the faster counter table directly as a fallback
        query = """
        SELECT count FROM packet_counters 
        WHERE counter_type = 'total_packets'
        LIMIT 1
        """

        case Repo.query(query, []) do
          {:ok, %{rows: [[count]]}} -> count
          _ -> 0
        end
    end
  rescue
    DBConnection.ConnectionError ->
      require Logger

      Logger.warning("Database connection error in get_total_packet_count, returning 0")
      0

    error ->
      require Logger

      Logger.error("Error getting total packet count: #{inspect(error)}")
      0
  end

  @doc """
  Gets the timestamp of the oldest stored packet in the database.
  Returns nil if no packets exist.
  """
  @spec get_oldest_packet_timestamp() :: DateTime.t() | nil
  def get_oldest_packet_timestamp do
    Repo.one(
      from p in Packet,
        select: min(p.received_at)
    )
  rescue
    _ -> nil
  end

  @doc """
  Configure packet retention policy.

  Packets are retained based on these rules:
  - Default retention is 365 days (1 year) (configurable via :packet_retention_days)
  - Returns the number of packets deleted
  """
  @impl true
  def clean_old_packets do
    retention_days = Application.get_env(:aprsme, :packet_retention_days, 365)
    cutoff_time = DateTime.add(DateTime.utc_now(), -retention_days * 86_400, :second)

    {deleted_count, _} = Repo.delete_all(from(p in Packet, where: p.received_at < ^cutoff_time))

    deleted_count
  end

  @doc """
  Clean packets older than a specific number of days.

  This function allows for more granular cleanup operations by specifying
  the exact age threshold for packet deletion.

  ## Parameters
  - `days` - Number of days to keep (packets older than this will be deleted)

  ## Returns
  - Number of packets deleted
  """
  @impl true
  @spec clean_packets_older_than(pos_integer()) :: {:ok, non_neg_integer()} | {:error, any()}
  def clean_packets_older_than(days) when is_integer(days) and days > 0 do
    cutoff_time = DateTime.add(DateTime.utc_now(), -days * 86_400, :second)

    {deleted_count, _} = Repo.delete_all(from(p in Packet, where: p.received_at < ^cutoff_time))

    {:ok, deleted_count}
  end

  # Helper to convert various types to float
  defp to_float(value), do: Aprsme.EncodingUtils.to_float(value)

  # Helper to convert various types to Decimal
  defp to_decimal(value), do: Aprsme.EncodingUtils.to_decimal(value)

  # Get packets from last hour only - used to initialize the map
  @spec get_last_hour_packets() :: [struct()]
  def get_last_hour_packets do
    %{hours_back: 1, limit: 500}
    |> QueryBuilder.recent_position_packets()
    |> QueryBuilder.chronological()
    |> Repo.all()
  rescue
    error ->
      Logger.error("Failed to get last hour packets: #{inspect(error)}")
      []
  end

  # @doc """
  # Spatial query functions for efficient location-based searches using PostGIS
  # """

  # Temporarily commented out PostGIS functions until PostGIS is properly configured

  # @doc """
  # Find packets within a given radius (in meters) of a point.
  # Uses PostGIS spatial indexes for efficient querying.
  # """
  # def find_packets_within_radius(lat, lon, radius_meters, opts \\ %{}) do
  #   point = %Geo.Point{coordinates: {lon, lat}, srid: 4326}

  #   base_query =
  #     Packet
  #     |> where([p], not is_nil(p.location))
  #     |> where([p], st_dwithin_in_meters(p.location, ^point, ^radius_meters))
  #     |> order_by([p], st_distance(p.location, ^point))

  #   base_query
  #   |> apply_common_filters(opts)
  #   |> maybe_limit(opts)
  #   |> Repo.all()
  # end

  # Additional PostGIS functions commented out for now...

  # Helper functions for spatial queries - commented out for now

  # defp apply_common_filters(query, opts) do
  #   query
  #   |> filter_by_time_range(opts)
  #   |> filter_by_callsign(opts)
  #   |> filter_by_data_type(opts)
  # end

  # defp filter_by_time_range(query, %{start_time: start_time, end_time: end_time}) do
  #   from p in query,
  #     where: p.received_at >= ^start_time and p.received_at <= ^end_time
  # end

  # defp filter_by_time_range(query, %{start_time: start_time}) do
  #   from p in query, where: p.received_at >= ^start_time
  # end

  # defp filter_by_time_range(query, %{end_time: end_time}) do
  #   from p in query, where: p.received_at <= ^end_time
  # end

  # defp filter_by_time_range(query, %{hours_back: hours}) do
  #   cutoff_time = DateTime.utc_now() |> DateTime.add(-hours, :hour)
  #   from p in query, where: p.received_at >= ^cutoff_time
  # end

  # defp filter_by_time_range(query, _), do: query

  # defp filter_by_data_type(query, %{data_type: data_type}) do
  #   from p in query, where: p.data_type == ^data_type
  # end

  # defp filter_by_data_type(query, _), do: query

  # defp maybe_limit(query, %{limit: limit}) when is_integer(limit) and limit > 0 do
  #   from p in query, limit: ^limit
  # end

  # defp maybe_limit(query, _), do: query

  # Calculate clustering distance based on zoom level
  # Higher zoom levels need smaller clustering distances
  # defp calculate_cluster_distance(zoom_level) when zoom_level >= 15, do: 100    # 100m
  # defp calculate_cluster_distance(zoom_level) when zoom_level >= 12, do: 500    # 500m
  # defp calculate_cluster_distance(zoom_level) when zoom_level >= 9, do: 2000    # 2km
  # defp calculate_cluster_distance(zoom_level) when zoom_level >= 6, do: 10000   # 10km
  # defp calculate_cluster_distance(_), do: 50000                                 # 50km

  @doc """
  Gets the most recent packet for a callsign regardless of type or age.
  This is used for API endpoints that need the latest packet from a source.
  """
  @spec get_latest_packet_for_callsign(String.t()) :: struct() | nil
  def get_latest_packet_for_callsign(callsign) when is_binary(callsign) do
    # Use prepared statement for better performance
    PreparedQueries.get_latest_packet_for_callsign(callsign)
  end

  @doc """
  Gets the most recent weather packet for a callsign.
  Looks for any packet containing weather data fields.
  """
  @spec get_latest_weather_packet(String.t()) :: struct() | nil
  def get_latest_weather_packet(callsign) when is_binary(callsign) do
    # Use proper index with short time window first
    case get_latest_weather_in_window(callsign, 24) do
      nil -> get_latest_weather_in_window(callsign, 168)
      packet -> packet
    end
  end

  @doc """
  Check if a callsign has any weather packets.
  """
  def has_weather_packets?(callsign) when is_binary(callsign) do
    # Use prepared statement for better performance
    PreparedQueries.has_weather_packets?(callsign)
  end

  defp get_latest_weather_in_window(callsign, hours) do
    import Ecto.Query

    since = DateTime.add(DateTime.utc_now(), -hours * 3600, :second)

    query =
      from p in Packet,
        where: p.sender == ^callsign,
        where: p.received_at > ^since,
        where:
          not is_nil(p.temperature) or not is_nil(p.humidity) or not is_nil(p.pressure) or
            not is_nil(p.wind_speed) or not is_nil(p.wind_direction) or not is_nil(p.rain_1h),
        order_by: [desc: p.received_at],
        limit: 1

    Repo.one(query)
  end
end