class_name SimulationContentPack
extends Resource

@export var pack_id: StringName
@export var display_name: String
@export var required_pack_ids: Array[StringName] = []
@export var required_handler_ids: Array[StringName] = []
@export var actions: Array[ActionDefinition] = []
@export var professions: Array[ProfessionDefinition] = []
@export var capability_tags: Array[CapabilityTagDefinition] = []
@export var items: Array[ItemDefinition] = []
@export var resources: Array[ResourceDefinition] = []
@export var storages: Array[StorageDefinition] = []
@export var enemies: Array[EnemyDefinition] = []
@export var animals: Array[AnimalDefinition] = []


func validate() -> Array[String]:
	var errors: Array[String] = []
	if pack_id.is_empty():
		errors.append("pack_id is empty")
	if display_name.is_empty():
		errors.append("display_name is empty for pack '%s'" % pack_id)
	_validate_dependency_ids(required_pack_ids, "required pack", errors)
	_validate_dependency_ids(required_handler_ids, "required handler", errors)
	if pack_id in required_pack_ids:
		errors.append("pack '%s' cannot require itself" % pack_id)
	_validate_actions(errors)
	_validate_professions(errors)
	_validate_capability_tags(errors)
	_validate_items(errors)
	_validate_resources(errors)
	_validate_storages(errors)
	_validate_enemies(errors)
	_validate_animals(errors)
	return errors


func _validate_actions(errors: Array[String]) -> void:
	for definition in actions:
		if definition == null:
			errors.append("actions contains a null definition")
			continue
		for error in definition.validate():
			errors.append("ActionDefinition: " + error)


func _validate_professions(errors: Array[String]) -> void:
	for definition in professions:
		if definition == null:
			errors.append("professions contains a null definition")
			continue
		for error in definition.validate():
			errors.append("ProfessionDefinition: " + error)


func _validate_items(errors: Array[String]) -> void:
	for definition in items:
		if definition == null:
			errors.append("items contains a null definition")
			continue
		for error in definition.validate():
			errors.append("ItemDefinition: " + error)


func _validate_capability_tags(errors: Array[String]) -> void:
	for definition in capability_tags:
		if definition == null:
			errors.append("capability_tags contains a null definition")
			continue
		for error in definition.validate():
			errors.append("CapabilityTagDefinition: " + error)


func _validate_resources(errors: Array[String]) -> void:
	for definition in resources:
		if definition == null:
			errors.append("resources contains a null definition")
			continue
		for error in definition.validate():
			errors.append("ResourceDefinition: " + error)


func _validate_storages(errors: Array[String]) -> void:
	for definition in storages:
		if definition == null:
			errors.append("storages contains a null definition")
			continue
		for error in definition.validate():
			errors.append("StorageDefinition: " + error)


func _validate_enemies(errors: Array[String]) -> void:
	for definition in enemies:
		if definition == null:
			errors.append("enemies contains a null definition")
			continue
		for error in definition.validate():
			errors.append("EnemyDefinition: " + error)


func _validate_animals(errors: Array[String]) -> void:
	for definition in animals:
		if definition == null:
			errors.append("animals contains a null definition")
			continue
		for error in definition.validate():
			errors.append("AnimalDefinition: " + error)


static func _validate_dependency_ids(
	ids: Array[StringName], label: String, errors: Array[String]
) -> void:
	var seen := {}
	for dependency_id in ids:
		if dependency_id.is_empty():
			errors.append("%s ID is empty" % label)
			continue
		if seen.has(dependency_id):
			errors.append("duplicate %s '%s'" % [label, dependency_id])
			continue
		seen[dependency_id] = true