extends SceneTree

var failures: Array[String] = []


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


func _run() -> void:
	_test_core_pack()
	_test_deterministic_enumeration_and_dependencies()
	_test_duplicate_ids_fail_without_overrides()
	_test_unknown_references_categories_and_handlers()
	_finish()


func _test_core_pack() -> void:
	var catalog := ContentCatalog.create_core()
	_check(catalog.is_valid(), "Core pack should validate: %s" % [catalog.get_errors()])
	_check(
		(
			_action_ids(catalog.get_actions())
			== [
				&"defend",
				&"deposit_food",
				&"deposit_wood",
				&"eat",
				&"feed_animal",
				&"gather_food",
				&"gather_wood",
				&"patrol",
				&"rest",
				&"sleep",
				&"study",
				&"wander",
				&"withdraw_food",
			]
		),
		"Core actions should enumerate by stable ID"
	)
	_check(
		(
			_profession_ids(catalog.get_professions())
			== [&"farmer", &"guard", &"scholar", &"wanderer", &"woodcutter"]
		),
		"Core professions should enumerate by stable ID"
	)
	_check(
		(
			_item_ids(catalog.get_items())
			== [&"food", &"herb", &"item_claw", &"item_sword", &"regional_trade_goods", &"wood"]
		),
		"Core items should include local and regional resources in stable-ID order"
	)
	_check(
		_enemy_ids(catalog.get_enemies()) == [&"enemy_boar", &"enemy_raider", &"enemy_wolf"],
		"Core enemies should enumerate by stable ID"
	)
	_check(
		_animal_ids(catalog.get_animals()) == [&"domestic_goat", &"domestic_sheep"],
		"Core animals should enumerate through the same content pack"
	)
	var food := catalog.get_item(SimulationIds.RESOURCE_FOOD)
	var wood := catalog.get_item(SimulationIds.RESOURCE_WOOD)
	var sword := catalog.get_item(SimulationIds.ITEM_SWORD)
	var claw := catalog.get_item(SimulationIds.ITEM_CLAW)
	_check(food != null and food.is_resource(), "Food should be a resource item")
	_check(wood != null and wood.is_resource(), "Wood should be a resource item")
	_check(
		sword != null and sword.is_weapon() and is_equal_approx(sword.damage, 24.0),
		"Sword should preserve its weapon contract"
	)
	_check(
		claw != null and claw.is_weapon() and is_equal_approx(claw.reach, 1.2),
		"Claw should preserve its weapon contract"
	)
	var wolf := catalog.get_enemy(&"enemy_wolf")
	var boar := catalog.get_enemy(&"enemy_boar")
	_check(
		wolf != null and wolf.weapon_id == SimulationIds.ITEM_CLAW,
		"Enemy references should resolve against catalog items"
	)
	_check(
		boar != null and boar.behavior_profile_id == wolf.behavior_profile_id,
		"New enemy types should be able to reuse an existing behavior profile"
	)


func _test_deterministic_enumeration_and_dependencies() -> void:
	var core := load(ContentCatalog.CORE_PACK_PATH) as SimulationContentPack
	var addon := _pack(&"addon", "Addon")
	addon.required_pack_ids = [&"core"]
	addon.required_handler_ids = [&"test_handler"]
	addon.items = [_resource_item(&"amber", "Amber")]
	var packs: Array[SimulationContentPack] = [addon, core]
	var catalog := ContentCatalog.new()
	var handlers: Array[StringName] = [&"test_handler"]
	var errors := catalog.rebuild(packs, handlers)
	_check(errors.is_empty(), "Known pack and handler dependencies should validate: %s" % [errors])
	_check(
		_pack_ids(catalog.get_packs()) == [&"addon", &"core"],
		"Pack enumeration should not depend on input order"
	)
	_check(
		(
			_item_ids(catalog.get_items())
			== [
				&"amber",
				&"food",
				&"herb",
				&"item_claw",
				&"item_sword",
				&"regional_trade_goods",
				&"wood",
			]
		),
		"Merged item enumeration should be globally stable-ID sorted"
	)
	var returned_items := catalog.get_items()
	returned_items.clear()
	_check(
		catalog.get_items().size() == 7,
		"Callers should not be able to mutate the catalog's ordered arrays"
	)


func _test_duplicate_ids_fail_without_overrides() -> void:
	var first := _pack(&"first", "First")
	first.items = [_resource_item(&"shared_item", "First value")]
	var second := _pack(&"second", "Second")
	second.items = [_resource_item(&"shared_item", "Second value")]
	var packs: Array[SimulationContentPack] = [second, first]
	var catalog := ContentCatalog.new()
	var errors := catalog.rebuild(packs)
	_check(_has_error(errors, "Duplicate item_id 'shared_item'"), "Duplicate item IDs should fail")
	_check(
		(
			not catalog.is_valid()
			and catalog.get_item(&"shared_item") == null
			and catalog.get_items().is_empty()
		),
		"An invalid build should publish neither duplicate value nor partial content"
	)

	var duplicate_pack := _pack(&"first", "Duplicate pack")
	var duplicate_packs: Array[SimulationContentPack] = [first, duplicate_pack]
	errors = catalog.rebuild(duplicate_packs)
	_check(_has_error(errors, "Duplicate pack_id 'first'"), "Duplicate pack IDs should fail")

	first = _pack(&"first", "First")
	second = _pack(&"second", "Second")
	first.animals = [_animal(&"shared_animal", &"feed_animal")]
	second.animals = [_animal(&"shared_animal", &"feed_animal")]
	var duplicate_animal_packs: Array[SimulationContentPack] = [second, first]
	errors = catalog.rebuild(duplicate_animal_packs)
	_check(
		_has_error(errors, "Duplicate animal_definition_id 'shared_animal'"),
		"Duplicate animal definitions should fail without an override"
	)


func _test_unknown_references_categories_and_handlers() -> void:
	var broken := _pack(&"broken", "Broken")
	broken.required_pack_ids = [&"missing_pack"]
	broken.required_handler_ids = [&"missing_handler"]
	var invalid_item := _resource_item(&"strange_item", "Strange")
	invalid_item.category = &"unknown_category"
	var ordinary_resource := _resource_item(&"ordinary_resource", "Ordinary resource")
	var missing_profession := _action(&"missing_profession")
	missing_profession.preferred_profession_id = &"unknown_profession"
	var missing_action := _action(&"missing_action")
	missing_action.target_type = SimulationIds.TARGET_RESOURCE
	missing_action.resource_action_id = &"unknown_resource_action"
	var missing_cost_item := _action(&"missing_cost")
	missing_cost_item.completion_cost_resource_id = &"unknown_cost_item"
	missing_cost_item.completion_cost_amount = 1.0
	missing_cost_item.selection_policy_id = &"unknown_selection"
	missing_cost_item.target_policy_id = &"unknown_targeting"
	missing_cost_item.completion_handler_id = &"unknown_completion"
	var invalid_effect := ActionEffect.new()
	invalid_effect.effect_id = &"broken_transfer"
	invalid_effect.effect_kind = ActionEffect.KIND_INVENTORY_TRANSFER
	missing_cost_item.effects = [invalid_effect]
	var weapon_item := _weapon_item(&"test_weapon", "Test weapon")
	var weapon_cost := _action(&"weapon_cost")
	weapon_cost.completion_cost_resource_id = weapon_item.item_id
	weapon_cost.completion_cost_amount = 1.0
	var missing_weapon := _enemy(&"missing_weapon_enemy", &"unknown_weapon")
	var non_weapon := _enemy(&"non_weapon_enemy", ordinary_resource.item_id)
	var missing_animal_action := _animal(&"unsupported_animal", &"unknown_animal_action")
	broken.items = [invalid_item, ordinary_resource, weapon_item]
	broken.actions = [missing_profession, missing_action, missing_cost_item, weapon_cost]
	broken.enemies = [missing_weapon, non_weapon]
	broken.animals = [missing_animal_action]
	var packs: Array[SimulationContentPack] = [broken]
	var known_handlers: Array[StringName] = [&"known_handler"]
	var catalog := ContentCatalog.new()
	var errors := catalog.rebuild(packs, known_handlers)
	for expected in [
		"unknown required pack 'missing_pack'",
		"unknown required handler 'missing_handler'",
		"category 'unknown_category' is invalid",
		"unknown profession 'unknown_profession'",
		"unknown resource action 'unknown_resource_action'",
		"unknown completion cost item 'unknown_cost_item'",
		"unknown selection policy 'unknown_selection'",
		"unknown target policy 'unknown_targeting'",
		"unknown completion handler 'unknown_completion'",
		"needs an item and positive amount",
		"needs source/destination roles",
		"non-resource completion cost item 'test_weapon'",
		"unknown weapon 'unknown_weapon'",
		"non-weapon item 'ordinary_resource'",
		"Animal 'unsupported_animal' references unknown action 'unknown_animal_action'",
	]:
		_check(_has_error(errors, expected), "Catalog should report %s: %s" % [expected, errors])
	_check(not catalog.is_valid(), "Unknown references should invalidate the complete catalog")


func _pack(pack_id: StringName, display_name: String) -> SimulationContentPack:
	var pack := SimulationContentPack.new()
	pack.pack_id = pack_id
	pack.display_name = display_name
	return pack


func _resource_item(item_id: StringName, display_name: String) -> ItemDefinition:
	var item := ItemDefinition.new()
	item.item_id = item_id
	item.display_name = display_name
	item.category = ItemDefinition.CATEGORY_RESOURCE
	return item


func _weapon_item(item_id: StringName, display_name: String) -> ItemDefinition:
	var item := ItemDefinition.new()
	item.item_id = item_id
	item.display_name = display_name
	item.category = ItemDefinition.CATEGORY_WEAPON
	item.equip_slot = SimulationIds.EQUIP_SLOT_HAND
	item.damage = 1.0
	item.reach = 1.0
	item.attack_cooldown = 1.0
	return item


func _action(action_id: StringName) -> ActionDefinition:
	var action := ActionDefinition.new()
	action.action_id = action_id
	action.display_name = String(action_id).capitalize()
	action.target_type = SimulationIds.TARGET_ACTIVITY
	return action


func _enemy(enemy_id: StringName, weapon_id: StringName) -> EnemyDefinition:
	var enemy := EnemyDefinition.new()
	enemy.enemy_id = enemy_id
	enemy.display_name = String(enemy_id).capitalize()
	enemy.kind = SimulationIds.COMBATANT_KIND_RAIDER
	enemy.weapon_id = weapon_id
	return enemy


func _animal(animal_definition_id: StringName, action_id: StringName) -> AnimalDefinition:
	var animal := AnimalDefinition.new()
	animal.animal_definition_id = animal_definition_id
	animal.species_id = &"test_species"
	animal.display_name = String(animal_definition_id).capitalize()
	animal.supported_action_ids = [action_id]
	animal.presentation_cue_id = PresentationCueIds.ANIMAL_DOMESTIC_GOAT
	return animal


func _pack_ids(packs: Array[SimulationContentPack]) -> Array[StringName]:
	var ids: Array[StringName] = []
	for pack in packs:
		ids.append(pack.pack_id)
	return ids


func _action_ids(actions: Array[ActionDefinition]) -> Array[StringName]:
	var ids: Array[StringName] = []
	for action in actions:
		ids.append(action.action_id)
	return ids


func _profession_ids(professions: Array[ProfessionDefinition]) -> Array[StringName]:
	var ids: Array[StringName] = []
	for profession in professions:
		ids.append(profession.profession_id)
	return ids


func _item_ids(items: Array[ItemDefinition]) -> Array[StringName]:
	var ids: Array[StringName] = []
	for item in items:
		ids.append(item.item_id)
	return ids


func _enemy_ids(enemies: Array[EnemyDefinition]) -> Array[StringName]:
	var ids: Array[StringName] = []
	for enemy in enemies:
		ids.append(enemy.enemy_id)
	return ids


func _animal_ids(animals: Array[AnimalDefinition]) -> Array[StringName]:
	var ids: Array[StringName] = []
	for animal in animals:
		ids.append(animal.animal_definition_id)
	return ids


func _has_error(errors: Array[String], fragment: String) -> bool:
	for error in errors:
		if fragment in error:
			return true
	return false


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


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