## T-1182 tests: StepCanvasLegend — smoke coverage (PR #203 review, Hoshe
## note). Not the retired atlas_window_legend.gd's own richer suite (that
## file never had a dedicated test — its coverage lived entirely inside
## AtlasWindowViewer's own suites, now retired); this pins the panel's basic
## lifecycle/content contract directly.
class_name TestStepCanvasLegend
extends GdUnitTestSuite

const LegendScript := preload("res://ui/implant/apps/atlas/step_canvas/step_canvas_legend.gd")


func test_legend_starts_hidden_before_refresh() -> void:
	var v: StepCanvasViewer = auto_free(StepCanvasViewer.new())
	add_child(v)
	var legend = LegendScript.new(v)
	auto_free(legend)
	assert_bool(legend.visible).is_false()


func test_refresh_makes_the_legend_visible_and_populates_content() -> void:
	var v: StepCanvasViewer = auto_free(StepCanvasViewer.new())
	add_child(v)
	v.enter({"body_id": "GJ380c", "body_radius_km": 6238.4}, {})
	var legend = LegendScript.new(v)
	add_child(legend)
	legend.refresh()
	assert_bool(legend.visible).is_true()
	assert_int(legend.get_implant_children().size()).override_failure_message(
		"refresh() must populate at least the always-on morphology/glaciation sections"
	).is_greater(0)


## refresh() is a no-op (does not crash) when the legend has no viewer —
## defensive guard against a construction-order mistake.
func test_refresh_without_a_viewer_does_not_crash() -> void:
	var legend = LegendScript.new(null)
	auto_free(legend)
	legend.refresh()
	assert_bool(legend.visible).is_false()


## Toggling a gen_* overlay on changes the legend's content (the active
## toggle section appears) without crashing — the same "no active toggle by
## default, one section per active toggle" contract the retired
## atlas_window_legend.gd's own refresh() doc described.
func test_refresh_reflects_the_active_overlay_toggle() -> void:
	var v: StepCanvasViewer = auto_free(StepCanvasViewer.new())
	add_child(v)
	v.enter({"body_id": "GJ380c", "body_radius_km": 6238.4}, {})
	var legend = LegendScript.new(v)
	add_child(legend)
	legend.refresh()
	var rows_before: int = legend.get_implant_children().size()

	v.set_overlay_visible("gen_dw_temp", true)
	legend.refresh()
	var rows_after: int = legend.get_implant_children().size()

	assert_int(rows_after).override_failure_message(
		"activating a toggle overlay must add its own legend section"
	).is_greater(rows_before)


func test_reposition_sets_a_fixed_panel_margin_position() -> void:
	var v: StepCanvasViewer = auto_free(StepCanvasViewer.new())
	add_child(v)
	var legend = LegendScript.new(v)
	auto_free(legend)
	legend.reposition()
	assert_that(legend.position).is_equal(Vector2(LegendScript.PANEL_MARGIN, 60.0))