extends SceneTree

var failures: Array[String] = []


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


func _run() -> void:
	var manager := _create_manager(913)
	manager.set_process(false)
	var pantry: StorageStateRecord = manager.get_pantry()
	pantry.withdraw(SimulationIds.RESOURCE_FOOD, pantry.get_amount(SimulationIds.RESOURCE_FOOD))
	pantry.deposit(SimulationIds.RESOURCE_FOOD, 2.0)
	manager.economy.sync_resource(SimulationIds.RESOURCE_FOOD)

	var berry := ResourceNode.new()
	berry.name = "CitizenBerry"
	berry.node_id = &"citizen_berry"
	berry.action_id = SimulationIds.ACTION_GATHER_FOOD
	berry.resource_id = SimulationIds.RESOURCE_FOOD
	berry.initial_amount = 2.0
	berry.yield_per_action = 1.0
	berry.debug_label_enabled = false
	var interaction_point := Marker3D.new()
	interaction_point.name = "InteractionPoint"
	interaction_point.position = Vector3.ZERO
	berry.add_child(interaction_point)
	root.add_child(berry)
	await process_frame
	_check(
		manager.register_resource_node(berry),
		"Player citizen test should bind a real finite ResourceNode"
	)

	var initial_hunger: float = manager.get_player_state().get_hunger()
	manager.simulate_tick()
	_check(
		is_equal_approx(manager.get_player_state().get_hunger(), initial_hunger + 0.125),
		"Player hunger should advance deterministically on each simulation tick"
	)
	_check(
		is_equal_approx(manager.get_player_state().get_energy(), 100.0 - 0.0625),
		"Player energy should drain by an exact binary fraction each tick"
	)

	_check(
		is_equal_approx(manager.harvest_resource_node(berry), 1.0),
		"The player should carry the first finite yield"
	)
	_check(
		is_equal_approx(manager.harvest_resource_node(berry), 1.0),
		"The player should carry the second finite yield"
	)
	_check(
		is_equal_approx(
			manager.get_player_state().get_inventory_amount(SimulationIds.RESOURCE_FOOD), 2.0
		),
		"Carried player food should be conserved across harvests"
	)

	var food_before: float = manager.get_player_state().get_hunger()
	_check(manager.eat_player_food(), "The player should eat carried food")
	_check(
		(
			is_equal_approx(manager.get_player_state().get_hunger(), maxf(food_before - 55.0, 0.0))
			and is_equal_approx(
				manager.get_player_state().get_inventory_amount(SimulationIds.RESOURCE_FOOD), 1.0
			)
		),
		"Eating carried food should ease hunger and consume exactly one unit"
	)
	_check(
		is_equal_approx(manager.deposit_player_inventory(SimulationIds.RESOURCE_FOOD), 1.0),
		"The player should deposit the remaining carried food"
	)
	_check(
		(
			is_equal_approx(
				manager.get_player_state().get_inventory_amount(SimulationIds.RESOURCE_FOOD), 0.0
			)
			and is_equal_approx(pantry.get_amount(SimulationIds.RESOURCE_FOOD), 3.0)
		),
		"Deposit should move carried food into the pantry without creating or destroying it"
	)

	var food_before_pantry: float = pantry.get_amount(SimulationIds.RESOURCE_FOOD)
	var hunger_before: float = manager.get_player_state().get_hunger()
	_check(manager.eat_player_food(), "The player should eat from the pantry when carrying nothing")
	_check(
		(
			is_equal_approx(
				pantry.get_amount(SimulationIds.RESOURCE_FOOD), food_before_pantry - 1.0
			)
			and is_equal_approx(
				manager.get_player_state().get_hunger(), maxf(hunger_before - 55.0, 0.0)
			)
		),
		"Pantry eating should consume one village food and ease player hunger"
	)

	manager.simulate_tick()
	var mid_hunger: float = manager.get_player_state().get_hunger()
	var saved_json: String = manager.serialize_state()
	var restored := _create_manager(914)
	_check(
		restored.restore_state_from_json(saved_json),
		"Player state should survive schema-v13 save and restore"
	)
	_check(
		(
			restored.get_state_checksum() == manager.get_state_checksum()
			and is_equal_approx(restored.get_player_state().get_hunger(), mid_hunger)
		),
		"Restore should preserve the deterministic player needs and checksum"
	)
	restored.free()

	var v12_data: Dictionary = manager.create_state_record().to_dictionary()
	v12_data["schema_version"] = SimulationStateRecord.PLAYER_NEEDS_SCHEMA_VERSION
	v12_data.erase("player")
	var migrated := SimulationStateRecord.from_dictionary(v12_data)
	_check(
		(
			migrated != null
			and migrated.player != null
			and is_equal_approx(migrated.player.get_hunger(), 40.0)
			and is_equal_approx(migrated.player.get_energy(), 100.0)
			and migrated.player.get_carried_total() == 0.0
		),
		"World schema v12 should migrate to v13 with a fresh default player record"
	)

	berry.queue_free()
	manager.free()
	_finish()


func _create_manager(seed_value: int = 913) -> Node:
	var manager: Node = load("res://simulation/SimulationManager.gd").new()
	manager.simulation_seed = seed_value
	manager.debug_logs = false
	var home_positions: Array[Vector3] = [
		Vector3(0.0, 0.0, 0.0),
		Vector3(2.0, 0.0, 0.0),
		Vector3(10.0, 0.0, 0.0),
		Vector3(12.0, 0.0, 0.0),
		Vector3(30.0, 0.0, 30.0),
		Vector3(40.0, 0.0, 40.0),
	]
	manager.home_positions = home_positions
	root.add_child(manager)
	manager.set_process(false)
	return manager


func _finish() -> void:
	if failures.is_empty():
		print("[TEST] Player citizen loop passed: needs -> carry -> eat -> deposit")
		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)