extends GdUnitTestSuite
## The inspiration list on its own: it shows every soundtrack from the server and
## scrolls by itself.

const SOUNDTRACKS: Array[String] = ["Chrono Trigger", "Final Fantasy VI", "Secret of Mana"]

var _snapshot: AutoloadSnapshot
var _server: FakeHttpTransport
var _runner: GdUnitSceneRunner
var _list: InspirationList


func before_test() -> void:
	_snapshot = AutoloadSnapshot.take([Settings])
	Settings.inspiration_list_speed = 0
	_server = FakeHttpTransport.new().install()
	_server.respond_json("/music/all", SOUNDTRACKS)
	_runner = scene_runner("res://quiz/InspirationList.tscn")
	_list = _runner.scene()


func after_test() -> void:
	await await_idle_frame()
	_server.uninstall()
	_snapshot.restore()


func _rows() -> Array[Node]:
	return _list.get_node("VBoxContainer").get_children()


func _texts() -> Array:
	return _rows().map(func(row: ListRow) -> String: return row.text)


func test_load_soundtracks_shows_every_soundtrack_in_order() -> void:
	_list.load_soundtracks()

	assert_array(_texts()).contains_exactly(SOUNDTRACKS)
	assert_array(_list.soundtracks).contains_exactly(SOUNDTRACKS)


func test_rows_alternate_backgrounds() -> void:
	_list.load_soundtracks()

	var rows: Array[Node] = _rows()
	assert_that((rows[0] as ListRow).get_theme_stylebox("panel")) \
			.is_not_equal((rows[1] as ListRow).get_theme_stylebox("panel"))
	assert_that((rows[0] as ListRow).get_theme_stylebox("panel")) \
			.is_equal((rows[2] as ListRow).get_theme_stylebox("panel"))


func test_loading_again_replaces_the_rows() -> void:
	_list.load_soundtracks()
	_server.respond_json("/music/all", ["Terranigma"])

	_list.load_soundtracks()

	assert_array(_texts()).contains_exactly(["Terranigma"])


func test_failed_load_keeps_the_rows() -> void:
	_list.load_soundtracks()
	_server.respond_bytes("/music/all", PackedByteArray(), 500)

	_list.load_soundtracks()

	assert_array(_texts()).contains_exactly(SOUNDTRACKS)


func _long_list() -> Array[String]:
	var names: Array[String] = []
	for i: int in 40:
		names.append("Soundtrack %d" % i)
	return names


func test_scrolls_down_by_itself() -> void:
	_list.show_soundtracks(_long_list())
	Settings.inspiration_list_speed = 5

	await _runner.simulate_frames(30, 16)

	assert_int(_list.scroll_vertical).is_greater(0)


func test_does_not_scroll_at_speed_zero() -> void:
	_list.show_soundtracks(_long_list())

	await _runner.simulate_frames(30, 16)

	assert_int(_list.scroll_vertical).is_equal(0)