extends TestCase
## Starts the real main scene with its own storage folder and runs a few
## frames.


func _start_main(directory: String) -> Node:
	var main: Node = load("res://main.tscn").instantiate()
	main.storage_dir = directory
	tree.root.add_child(main)
	return main


func _stop_main(main: Node) -> void:
	tree.root.remove_child(main)
	main.free()


func test_a_new_game_starts_and_the_player_joins() -> void:
	var directory := TestFiles.temporary_dir("main")
	var main := _start_main(directory)
	for frame in 5:
		await tree.process_frame
	var session: GwSession = main.session
	check(session != null and session.is_running(), "a session runs")
	check(not session.is_broken(), "the simulation is healthy")
	check_eq(session.local_player(), 0, "the local player has joined")
	check_eq(main.avatar.position, GridMotion.tile_center(session.spawn_point()), "the figure stands on the spawn")
	check_eq(main.hud.stone_text(), tr("STONE_COUNT") % 0, "the HUD shows the stones")
	_stop_main(main)
	TestFiles.remove_dir(directory)


func test_a_saved_game_is_continued_on_the_next_start() -> void:
	var directory := TestFiles.temporary_dir("continue")
	var first := _start_main(directory)
	await tree.process_frame
	var tick_at_save: int = first.session.tick()
	check(first.save_game(), "the game was saved")
	_stop_main(first)

	var second := _start_main(directory)
	await tree.process_frame
	check(second.session.tick() > tick_at_save, "the saved world continues")
	check_eq(second.session.local_player(), 0, "the same player rejoins")
	_stop_main(second)
	TestFiles.remove_dir(directory)


func test_closing_the_window_saves_the_game_and_records_the_session() -> void:
	var directory := TestFiles.temporary_dir("close")
	var main := _start_main(directory)
	await tree.process_frame
	main.notification(Node.NOTIFICATION_WM_CLOSE_REQUEST)
	var store := SaveStore.new(directory)
	check(store.has_save(), "the game was saved")
	check_eq(store.recordings().size(), 1, "the session was recorded")
	_stop_main(main)
	TestFiles.remove_dir(directory)


func test_the_game_is_saved_automatically_every_two_minutes() -> void:
	var directory := TestFiles.temporary_dir("autosave")
	var main := _start_main(directory)
	var store := SaveStore.new(directory)
	check(not store.has_save(), "there is no save at the start")
	# No frames are awaited, so only these ticks run.
	while main.session.tick() < main.AUTOSAVE_TICKS - 1:
		main._run_tick()
	check(not store.has_save(), "still no save one tick before the interval ends")
	main._run_tick()
	check(store.has_save(), "saved when the interval ends")
	_stop_main(main)
	TestFiles.remove_dir(directory)


func test_an_unusable_save_is_set_aside_and_a_new_world_starts() -> void:
	var directory := TestFiles.temporary_dir("broken")
	var store := SaveStore.new(directory)
	store.write_save(PackedByteArray([1, 2, 3]))
	var main := _start_main(directory)
	await tree.process_frame
	check(main.session.is_running(), "a new world runs")
	check(main.session.tick() <= 5, "it is new, tick %d" % main.session.tick())
	check(FileAccess.file_exists(directory.path_join(SaveStore.SAVE_FILE + ".broken")), "the unusable save is kept aside")
	check_eq(main.hud.message(), tr("LOAD_FAILED"), "the player is told")
	_stop_main(main)
	TestFiles.remove_dir(directory)


func test_an_unusable_save_that_cannot_be_set_aside_is_never_overwritten() -> void:
	var directory := TestFiles.temporary_dir("stuck")
	var store := SaveStore.new(directory)
	store.write_save(PackedByteArray([1, 2, 3]))
	# A folder under the set-aside name keeps the unusable save from moving.
	DirAccess.make_dir_absolute(directory.path_join(SaveStore.SAVE_FILE + ".broken"))
	var main := _start_main(directory)
	await tree.process_frame
	check(main.session.is_running(), "a new world runs")
	check(not main.save_game(), "saving is refused")
	check_eq(store.read_save(), PackedByteArray([1, 2, 3]), "the unusable save is untouched")
	check_eq(main.hud.message(), tr("LOAD_FAILED"), "the player is told")
	_stop_main(main)
	TestFiles.remove_dir(directory)