defmodule Microwaveprop.Buildings.IndexTest do
  use ExUnit.Case, async: false

  alias Microwaveprop.Buildings.Index

  setup do
    Index.clear()
    :ok
  end

  test "max_height_near/3 returns 0 when no buildings have been indexed" do
    assert Index.max_height_near(32.8, -97.0, 100) == 0.0
  end

  test "insert_records/1 then max_height_near/3 returns the tallest nearby height" do
    Index.insert_records([
      %{centroid_lat: 32.8000, centroid_lon: -97.0000, max_radius_m: 10.0, height_m: 8.0},
      %{centroid_lat: 32.8001, centroid_lon: -97.0001, max_radius_m: 10.0, height_m: 25.0},
      # Far away — should not be considered.
      %{centroid_lat: 33.0, centroid_lon: -97.5, max_radius_m: 10.0, height_m: 100.0}
    ])

    assert Index.max_height_near(32.8000, -97.0000, 50) == 25.0
  end

  test "max_height_near/3 returns 0 when buildings are outside the radius" do
    Index.insert_records([
      %{centroid_lat: 32.8500, centroid_lon: -97.0500, max_radius_m: 10.0, height_m: 50.0}
    ])

    assert Index.max_height_near(32.8000, -97.0000, 100) == 0.0
  end

  test "records_near/3 returns matching records" do
    Index.insert_records([
      %{centroid_lat: 32.8000, centroid_lon: -97.0000, max_radius_m: 10.0, height_m: 8.0},
      %{centroid_lat: 32.8001, centroid_lon: -97.0001, max_radius_m: 10.0, height_m: 25.0}
    ])

    records = Index.records_near(32.8000, -97.0000, 50)
    assert length(records) == 2
    heights = records |> Enum.map(& &1.height_m) |> Enum.sort()
    assert heights == [8.0, 25.0]
  end

  test "records_near/3 returns empty list outside radius" do
    Index.insert_records([
      %{centroid_lat: 33.0, centroid_lon: -97.5, max_radius_m: 10.0, height_m: 50.0}
    ])

    assert Index.records_near(32.8, -97.0, 100) == []
  end

  test "mark_loaded/1 and loaded?/1 track loaded quadkeys" do
    refute Index.loaded?("023112330")
    Index.mark_loaded("023112330")
    assert Index.loaded?("023112330")
  end

  test "insert_records/1 handles empty list" do
    Index.insert_records([])
    assert Index.max_height_near(32.8, -97.0, 100) == 0.0
  end
end