extends SceneTree

var failures: Array[String] = []

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

func _run() -> void:
	var manager: Node = load("res://simulation/SimulationManager.gd").new()
	manager.debug_logs = false
	root.add_child(manager)
	manager.set_process(false)

	var pantry: StorageStateRecord = manager.get_pantry()
	pantry.withdraw(SimulationIds.RESOURCE_FOOD, 1000.0)
	manager._sync_village_food()
	var resource := ResourceStateRecord.from_dictionary({
		"schema_version": ResourceStateRecord.SCHEMA_VERSION,
		"node_id": "food_loop_bush",
		"action_id": String(SimulationIds.ACTION_GATHER_FOOD),
		"resource_id": String(SimulationIds.RESOURCE_FOOD),
		"amount_remaining": 10.0,
		"yield_per_action": 2.0,
		"reserved_by": -1,
		"enabled": true,
		"can_npcs_use": true,
		"can_player_use": true
	})
	manager.resource_states[resource.get_node_id()] = resource

	var npc: SimNPC = manager.npcs[0]
	npc.hunger = 20.0
	npc.energy = 100.0
	npc.set_task(SimulationIds.ACTION_GATHER_FOOD, 1.0)
	npc.target_id = resource.get_node_id()
	resource.reserve(npc.id)
	npc.start_working()
	manager.simulate_tick()

	_check(
		is_equal_approx(resource.get_amount_remaining(), 8.0)
		and is_equal_approx(
			npc.get_inventory_amount(SimulationIds.RESOURCE_FOOD),
			2.0
		),
		"Gathering should move food from the source into NPC inventory"
	)
	_check(
		is_equal_approx(pantry.get_amount(SimulationIds.RESOURCE_FOOD), 0.0),
		"Gathering should not teleport food into storage"
	)

	manager.simulate_tick()
	_check(
		npc.current_task == SimulationIds.ACTION_DEPOSIT_FOOD,
		"Carried food should select the deposit action"
	)
	manager.notify_npc_arrived(npc.id)
	manager.simulate_tick()
	_check(
		is_equal_approx(pantry.get_amount(SimulationIds.RESOURCE_FOOD), 2.0)
		and is_equal_approx(
			npc.get_inventory_amount(SimulationIds.RESOURCE_FOOD),
			0.0
		),
		"Deposit should transfer carried food into the pantry"
	)

	npc.hunger = 80.0
	manager.simulate_tick()
	_check(
		npc.current_task == SimulationIds.ACTION_WITHDRAW_FOOD,
		"Hungry NPC should retrieve food from storage"
	)
	manager.notify_npc_arrived(npc.id)
	manager.simulate_tick()
	_check(
		is_equal_approx(pantry.get_amount(SimulationIds.RESOURCE_FOOD), 1.0)
		and is_equal_approx(
			npc.get_inventory_amount(SimulationIds.RESOURCE_FOOD),
			1.0
		),
		"Withdraw should transfer pantry food into NPC inventory"
	)

	manager.simulate_tick()
	_check(
		npc.current_task == SimulationIds.ACTION_EAT,
		"NPC carrying food should select eat"
	)
	manager.notify_npc_arrived(npc.id)
	var hunger_before_eating := npc.hunger
	manager.simulate_tick()
	manager.simulate_tick()
	_check(
		npc.hunger < hunger_before_eating
		and is_equal_approx(
			npc.get_inventory_amount(SimulationIds.RESOURCE_FOOD),
			0.0
		),
		"Eating should consume carried food and reduce hunger"
	)

	var conserved_food := (
		resource.get_amount_remaining()
		+ pantry.get_amount(SimulationIds.RESOURCE_FOOD)
		+ npc.get_inventory_amount(SimulationIds.RESOURCE_FOOD)
	)
	_check(
		is_equal_approx(conserved_food, 9.0),
		"Exactly one food unit should leave the world when eaten"
	)
	_check_economic_event_chain(manager)

	var restored: Node = load("res://simulation/SimulationManager.gd").new()
	restored.debug_logs = false
	root.add_child(restored)
	restored.set_process(false)
	_check(
		restored.restore_state_from_json(manager.serialize_state()),
		"Economic events should restore with the simulation"
	)
	_check(
		restored.economic_events.size() == manager.economic_events.size()
		and restored.next_event_id == manager.next_event_id,
		"Economic event history and its next ID should round-trip"
	)

	if failures.is_empty():
		print("[TEST] Food storage loop passed")
		quit(0)
		return
	for failure in failures:
		push_error("[TEST] " + failure)
	quit(1)

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

func _check_economic_event_chain(manager: Node) -> void:
	var expected_types: Array[StringName] = [
		SimulationIds.EVENT_RESOURCE_EXTRACTED,
		SimulationIds.EVENT_STORAGE_DEPOSITED,
		SimulationIds.EVENT_STORAGE_WITHDRAWN,
		SimulationIds.EVENT_ITEM_CONSUMED
	]
	_check(
		manager.economic_events.size() == expected_types.size(),
		"Food transfer loop should emit one structured event per transfer"
	)
	if manager.economic_events.size() != expected_types.size():
		return
	for index in expected_types.size():
		var event: EconomicEventRecord = manager.economic_events[index]
		_check(
			int(event.data["event_id"]) == index
			and StringName(event.data["event_type"]) == expected_types[index]
			and StringName(event.data["item_id"])
				== SimulationIds.RESOURCE_FOOD,
			"Economic event order, identity, and item should be deterministic"
		)
	_check(
		is_equal_approx(
			float(manager.economic_events[0].data["amount"]),
			2.0
		)
		and is_equal_approx(
			float(manager.economic_events[1].data["amount"]),
			2.0
		)
		and is_equal_approx(
			float(manager.economic_events[2].data["amount"]),
			1.0
		)
		and is_equal_approx(
			float(manager.economic_events[3].data["amount"]),
			1.0
		),
		"Economic events should record exact transferred quantities"
	)