gamedev-the-steward/tests/animal_feeding_vertical_slice_test.gd

extends SceneTree

var failures: Array[String] = []


func _initialize() -> void:
	call_deferred("_run")


func _run() -> void:
	var main_scene: Node = load("res://main.tscn").instantiate()
	root.add_child(main_scene)
	await process_frame
	var manager: Node = main_scene.get_node("SimulationManager")
	manager.set_process(false)
	for _frame in 3:
		await physics_frame

	var goat := main_scene.get_node("JajceWorld/WorldObjects/Animals/Dunja") as AnimalNode
	var player := main_scene.get_node("Player") as Node3D
	var pantry_node := StorageNode.get_by_id(SimulationIds.STORAGE_VILLAGE_PANTRY) as StorageNode
	var pantry: StorageStateRecord = manager.get_pantry()
	var state: AnimalStateRecord = manager.animal_care.get_state(SimulationIds.ANIMAL_DUNJA)
	_check(goat != null, "Jajce should load Dunja's named presentation")
	_check(
		AnimalNode.get_all().size() == 2 and ResourceNode.get_all().size() == 18,
		"Named goats should remain AnimalNodes without changing the finite-resource count"
	)
	_check(
		not goat.is_in_group("resource_nodes") and ResourceNode.get_by_id(goat.animal_id) == null,
		"Dunja must not masquerade as a ResourceNode",
	)
	_check(
		(
			goat.animal_id == SimulationIds.ANIMAL_DUNJA
			and goat.display_name == "Dunja"
			and goat.species_id == SimulationIds.SPECIES_GOAT
			and state != null
			and goat.state == state
		),
		"The loaded presentation should bind the stable named-goat identity"
	)
	if state == null:
		_finish()
		return

	var authored_position := state.get_position()
	_check(
		goat.global_position.is_equal_approx(authored_position),
		"Animal state should own the loaded presentation position"
	)
	state.set_position(authored_position + Vector3(0.25, 0.0, 0.0))
	_check(
		goat.global_position.is_equal_approx(state.get_position()),
		"A simulation position change should move the bound goat presentation"
	)
	state.set_position(authored_position)

	for index in range(1, manager.npcs.size()):
		_park_npc(manager.npcs[index])
	var caretaker: SimNPC = manager.npcs[0]
	manager.release_npc_reservation(caretaker.id)
	caretaker.inventory.clear()
	caretaker.hunger = 20.0
	caretaker.energy = 90.0
	caretaker.current_task = SimulationIds.ACTION_IDLE
	caretaker.task_state = SimNPC.TASK_STATE_IDLE
	caretaker.task_complete = true
	caretaker.target_id = &""
	caretaker.has_travel_target = false
	state.set_hunger(72.0)
	var pantry_before_npc := pantry.get_amount(SimulationIds.RESOURCE_FOOD)

	manager.simulate_tick()
	_check(
		caretaker.current_task == SimulationIds.ACTION_FEED_ANIMAL,
		"An available villager should autonomously choose to feed hungry Dunja"
	)
	if caretaker.target_id.is_empty():
		manager.resolve_npc_target(caretaker.id, caretaker.position)
	_check(
		(
			caretaker.target_id == SimulationIds.ANIMAL_DUNJA
			and state.get_reserved_by() == caretaker.id
			and pantry_node != null
			and caretaker.travel_target_position.is_equal_approx(
				pantry_node.get_interaction_position()
			)
		),
		"Animal target resolution should retain Dunja's exact claim while routing to the pantry"
	)
	manager.notify_npc_arrived(caretaker.id)
	_check(
		(
			is_equal_approx(caretaker.get_inventory_amount(SimulationIds.RESOURCE_FOOD), 1.0)
			and caretaker.target_id == SimulationIds.ANIMAL_DUNJA
			and state.get_reserved_by() == caretaker.id
			and caretaker.task_state == SimNPC.TASK_STATE_TRAVELING
			and caretaker.travel_target_position.is_equal_approx(goat.get_interaction_position())
		),
		"Pantry arrival should carry one real food toward the same reserved Dunja",
	)
	manager.notify_npc_arrived(caretaker.id)
	manager.simulate_tick()
	var hunger_before_completion := state.get_hunger()
	manager.simulate_tick()

	_check(
		is_equal_approx(
			state.get_hunger(),
			(
				hunger_before_completion
				+ AnimalStateRecord.HUNGER_PER_TICK
				- AnimalStateRecord.HUNGER_RELIEF
			)
		),
		"NPC feeding should apply the exact simulation-owned hunger relief"
	)
	_check(
		is_equal_approx(pantry.get_amount(SimulationIds.RESOURCE_FOOD), pantry_before_npc - 1.0),
		"NPC feeding should withdraw exactly one real pantry food"
	)
	_check(
		state.get_last_fed_tick() == manager.tick_count and state.get_reserved_by() == -1,
		"Completed feeding should retain its deterministic tick and release the claim"
	)
	var npc_feed_event := _latest_feed_event(manager)
	_check(
		(
			npc_feed_event != null
			and int(npc_feed_event.data["actor_id"]) == caretaker.id
			and (
				StringName(npc_feed_event.data["source_id"])
				== SimulationIds.npc_inventory_id(caretaker.id)
			)
			and (StringName(npc_feed_event.data["destination_id"]) == SimulationIds.ANIMAL_DUNJA)
			and StringName(npc_feed_event.data["item_id"]) == SimulationIds.RESOURCE_FOOD
			and is_equal_approx(float(npc_feed_event.data["amount"]), 1.0)
			and npc_feed_event.get_world_position().is_equal_approx(state.get_position())
		),
		"NPC feeding should record one exact carried-inventory-to-animal transfer fact"
	)
	_check(
		(
			not goat.get_node("Visual/HungerCueRoot").visible
			and goat.get_node("Visual/FedResponseRoot").visible
		),
		"Real feeding should clear the stable hunger cue and play one cozy response"
	)

	var npc_feed_json: String = manager.serialize_state()
	var npc_feed_checksum: String = manager.get_state_checksum()
	var saved_hunger := state.get_hunger()
	var saved_fed_tick := state.get_last_fed_tick()
	_check(
		manager.restore_state_from_json(npc_feed_json),
		"NPC-fed animal state should pass the complete schema and restore"
	)
	state = manager.animal_care.get_state(SimulationIds.ANIMAL_DUNJA)
	pantry = manager.get_pantry()
	_check(
		(
			goat.state == state
			and state.get_position().is_equal_approx(authored_position)
			and is_equal_approx(state.get_hunger(), saved_hunger)
			and state.get_last_fed_tick() == saved_fed_tick
			and manager.get_state_checksum() == npc_feed_checksum
		),
		"Animal position, hunger, feed tick, and checksum should round-trip deterministically"
	)
	_check(
		not goat.get_node("Visual/FedResponseRoot").visible,
		"Restore should rebuild stable animal cues without replaying transient praise"
	)

	state.set_hunger(72.0)
	var pantry_before_player := pantry.get_amount(SimulationIds.RESOURCE_FOOD)
	player.global_position = goat.get_interaction_position()
	player.call("try_interact")
	var player_feed_event := _latest_feed_event(manager)
	_check(
		(
			is_equal_approx(
				pantry.get_amount(SimulationIds.RESOURCE_FOOD), pantry_before_player - 1.0
			)
			and is_equal_approx(state.get_hunger(), 72.0 - AnimalStateRecord.HUNGER_RELIEF)
			and player_feed_event != null
			and int(player_feed_event.data["actor_id"]) == -1
			and (StringName(player_feed_event.data["destination_id"]) == SimulationIds.ANIMAL_DUNJA)
		),
		"The player should use the same exact one-food animal mutation"
	)
	var player_feed_json: String = manager.serialize_state()
	_check(
		manager.restore_state_from_json(player_feed_json),
		"Player-fed animal history should restore through the same schema"
	)
	state = manager.animal_care.get_state(SimulationIds.ANIMAL_DUNJA)
	pantry = manager.get_pantry()
	_check(
		not goat.get_node("Visual/FedResponseRoot").visible,
		"Player feed feedback should also remain transient across restore"
	)

	state.set_hunger(72.0)
	pantry.withdraw(SimulationIds.RESOURCE_FOOD, pantry.get_amount(SimulationIds.RESOURCE_FOOD))
	manager.economy.sync_resource(SimulationIds.RESOURCE_FOOD)
	var events_before_failed_feed: int = manager.economic_events.size()
	player.global_position = goat.get_interaction_position()
	player.call("try_interact")
	_check(
		(
			is_equal_approx(state.get_hunger(), 72.0)
			and is_equal_approx(pantry.get_amount(SimulationIds.RESOURCE_FOOD), 0.0)
			and manager.economic_events.size() == events_before_failed_feed
		),
		"An empty pantry should block feeding without inventing food or animal relief"
	)

	_finish()


func _park_npc(npc: SimNPC) -> void:
	npc.set_task(SimulationIds.ACTION_WANDER, 1000.0)
	npc.start_working()


func _latest_feed_event(manager: Node) -> EconomicEventRecord:
	for index in range(manager.economic_events.size() - 1, -1, -1):
		var event := manager.economic_events[index] as EconomicEventRecord
		if StringName(event.data["event_type"]) == SimulationIds.EVENT_ANIMAL_FED:
			return event
	return null


func _check(condition: bool, message: String) -> void:
	if not condition:
		failures.append(message)


func _finish() -> void:
	if failures.is_empty():
		print("[TEST] Animal feeding vertical slice passed")
		quit(0)
		return
	for failure in failures:
		push_error("[TEST] " + failure)
	quit(1)