require_relative "test_helper"
require "maptool/track_stats"

class TrackStatsTest < Minitest::Test
  def test_computes_distance_and_elevation_gain_ignoring_descents
    # A right-angle path (equirectangular approximation is accurate enough
    # at this scale to just assert "nonzero, roughly plausible") with a
    # climb-then-descend elevation profile, so both distance and
    # elevation-gain have a real value to check against.
    points = [
      [17.0, 48.0, 100],
      [17.001, 48.0, 150], # +50m gain
      [17.001, 48.001, 120], # descent — not subtracted
    ]
    times = [Time.utc(2026, 1, 1, 0, 0, 0), nil, Time.utc(2026, 1, 1, 0, 10, 0)]

    stats = Maptool::TrackStats.compute(points, times: times)

    assert_operator stats["distance_meters"], :>, 100
    assert_equal 50.0, stats["elevation_gain_meters"]
    assert_equal 600, stats["duration_secs"]
    assert_equal 3, stats["point_count"]
  end

  def test_nil_elevation_gain_and_duration_when_data_is_missing
    stats = Maptool::TrackStats.compute([[17.0, 48.0], [17.0, 48.0]], times: [])
    assert_nil stats["elevation_gain_meters"]
    assert_nil stats["duration_secs"]
  end

  def test_single_point_has_zero_distance
    stats = Maptool::TrackStats.compute([[17.0, 48.0]])
    assert_equal 0.0, stats["distance_meters"]
  end
end