require_relative "test_helper"
require "maptool/gpx"

class GpxTest < Minitest::Test
  def test_kinds_detects_waypoints_and_tracks
    assert_equal %w[waypoint track], Maptool::Gpx.kinds(fixture_path("sample.gpx"))
  end

  def test_to_geojson_produces_a_waypoint_point_feature
    geojson = Maptool::Gpx.to_geojson(fixture_path("sample.gpx"))
    waypoint = geojson["features"].find { |f| f["properties"]["kind"] == "waypoint" }

    assert_equal "Point", waypoint["geometry"]["type"]
    assert_equal [17.2, 48.1, 200.0], waypoint["geometry"]["coordinates"]
    assert_equal "Start", waypoint["properties"]["name"]
    assert_includes waypoint["properties"]["description"], "example.com"
  end

  def test_to_geojson_produces_a_track_multilinestring_with_stats
    geojson = Maptool::Gpx.to_geojson(fixture_path("sample.gpx"))
    track = geojson["features"].find { |f| f["properties"]["kind"] == "track" }

    assert_equal "MultiLineString", track["geometry"]["type"]
    assert_equal 3, track["geometry"]["coordinates"][0].size
    assert_equal "Morning Loop", track["properties"]["name"]
    assert_equal "running", track["properties"]["activity_type"]
    assert_operator track["properties"]["distance_meters"], :>, 0
    assert_equal 50.0, track["properties"]["elevation_gain_meters"], "200->250 is the only gain, 250->230 descent not subtracted"
    assert_equal 1200, track["properties"]["duration_secs"]
  end

  def test_track_profile_carries_extension_fields_and_tolerates_points_without_them
    geojson = Maptool::Gpx.to_geojson(fixture_path("sample.gpx"))
    profile = geojson["features"].find { |f| f["properties"]["kind"] == "track" }["properties"]["profile"]

    assert_equal 3, profile.size
    assert_equal 140, profile[0]["heart_rate_bpm"]
    assert_equal 84, profile[1]["cadence_rpm"]
    assert_nil profile[2]["heart_rate_bpm"], "third point has no <extensions>"
    assert_equal 0.0, profile[0]["distance_meters"]
    assert_equal [17.2, 48.1], [profile[0]["lon"], profile[0]["lat"]]
  end

  def test_waypoint_captures_category_and_color_from_poi_extensions
    geojson = Maptool::Gpx.to_geojson(fixture_path("sample_poi.gpx"))
    free_spot = geojson["features"].find { |f| f["properties"]["name"] == "Free spot" }

    assert_equal "Free motorhome area", free_spot["properties"]["category"]
    assert_equal "#2E7D32", free_spot["properties"]["color"]
    assert_equal "tourism_camp_site", free_spot["properties"]["icon"]
  end

  # Regression test for a real bug: a p4n2gpx export's <extensions> carries
  # both an <osmand:icon> (a category key this app can render) and a
  # <locus:icon> (a Locus-app drawable path) side by side. REXML strips
  # namespace prefixes from Element#name, so both elements report the same
  # local name "icon" — matching on that alone picked whichever happened to
  # come last in the file (locus, since it followed osmand), leaving every
  # waypoint's icon set to a meaningless drawable path that never matched
  # any category. Must match by namespace URI instead.
  def test_waypoint_icon_ignores_non_osmand_extensions_with_the_same_local_name
    geojson = Maptool::Gpx.to_geojson(fixture_path("sample_poi.gpx"))
    export = geojson["features"].find { |f| f["properties"]["name"] == "p4n2gpx export" }

    assert_equal "amenity_parking", export["properties"]["icon"]
  end

  def test_waypoint_without_category_or_color_leaves_them_nil
    geojson = Maptool::Gpx.to_geojson(fixture_path("sample_poi.gpx"))
    plain = geojson["features"].find { |f| f["properties"]["name"] == "Plain waypoint" }

    assert_nil plain["properties"]["category"]
    assert_nil plain["properties"]["color"]
    assert_nil plain["properties"]["icon"]
  end

  def test_kinds_detects_routes
    assert_equal ["route"], Maptool::Gpx.kinds(fixture_path("sample_route.gpx"))
  end

  def test_to_geojson_produces_a_route_multilinestring
    geojson = Maptool::Gpx.to_geojson(fixture_path("sample_route.gpx"))
    route = geojson["features"].find { |f| f["properties"]["kind"] == "route" }

    assert_equal "MultiLineString", route["geometry"]["type"]
    assert_equal 2, route["geometry"]["coordinates"][0].size
    assert_equal "Planned Loop", route["properties"]["name"]
    assert_nil route["properties"]["activity_type"], "<rte> has no GPX equivalent of <trk><type>"
    assert_operator route["properties"]["distance_meters"], :>, 0
  end

  # Regression test for a real bug: point_extensions originally used the
  # "extensions//*" XPath (REXML's `//` descendant axis), which cost
  # milliseconds *per call* regardless of subtree size — fine on this
  # suite's small fixtures, ~30s on a real 8000-point file. This fixture is
  # smaller than that (keeping the suite fast) but big enough that an
  # O(n^2) reintroduction would make itself obvious well under the bound.
  def test_parsing_many_points_with_extensions_stays_fast
    points = Array.new(2000) do |i|
      <<~TRKPT
        <trkpt lat="48.1" lon="17.2"><ele>200</ele><time>2026-01-01T09:00:#{format("%02d", i % 60)}Z</time>
          <extensions><gpxtpx:TrackPointExtension xmlns:gpxtpx="urn"><gpxtpx:hr>140</gpxtpx:hr></gpxtpx:TrackPointExtension></extensions>
        </trkpt>
      TRKPT
    end.join
    path = File.join(Dir.mktmpdir, "big.gpx")
    File.write(path, "<gpx><trk><trkseg>#{points}</trkseg></trk></gpx>")

    started = Time.now
    geojson = Maptool::Gpx.to_geojson(path)
    elapsed = Time.now - started

    assert_equal 2000, geojson["features"][0]["geometry"]["coordinates"][0].size
    assert_operator elapsed, :<, 5, "took #{elapsed}s for 2000 points — was O(n^2) via an XPath descendant search once, see comment above"
  end

  def test_invalid_xml_raises_parse_error
    path = File.join(Dir.mktmpdir, "bad.gpx")
    File.write(path, "<gpx><trk unclosed>")

    assert_raises(Maptool::Gpx::ParseError) { Maptool::Gpx.to_geojson(path) }
  end

  def test_non_gpx_root_raises_parse_error
    path = File.join(Dir.mktmpdir, "notgpx.gpx")
    File.write(path, "<html></html>")

    assert_raises(Maptool::Gpx::ParseError) { Maptool::Gpx.to_geojson(path) }
  end
end