# datapack_creator.gd
class_name DatapackCreator
extends RefCounted

const BASE_DATAPACKS_PATH = "user://datapacks/"
const METADATA_FILENAME = "config.szpack"
const DATAPACK_RESOURCE_FILENAME = "datapack.res"
const ASSETS_SUBDIR = "assets"

const SINGLE_FILE_SAVE_FLAGS = ResourceSaver.FLAG_COMPRESS | ResourceSaver.FLAG_CHANGE_PATH 

var _pack_base_path: String = ""


func save_datapack(datapack: DatapackModel, pack_name: String) -> bool:
	var full_pack_name = pack_name.validate_node_name()
	if full_pack_name.is_empty():
		push_error("DatapackCreator: Invalid pack_name provided.")
		return false
		
	_pack_base_path = BASE_DATAPACKS_PATH + full_pack_name + "/"
	
	var assets_path = _pack_base_path + ASSETS_SUBDIR
	
	var success_dirs = true
	success_dirs = success_dirs and _make_dir_recursive_safe(_pack_base_path)
	success_dirs = success_dirs and _make_dir_recursive_safe(assets_path)
	
	if not success_dirs:
		push_error("DatapackCreator: Failed to create necessary directories.")
		return false

	var main_resource_path = _pack_base_path + DATAPACK_RESOURCE_FILENAME
	
	var error = ResourceSaver.save(datapack, main_resource_path, SINGLE_FILE_SAVE_FLAGS)
	
	if error != OK:
		push_error("DatapackCreator: Failed to save datapack resource at path '%s'. Error: %s" % [main_resource_path, error])
		return false
		
	if not _write_metadata_file(datapack, _pack_base_path + METADATA_FILENAME):
		return false

	print("Datapack saved successfully to: %s" % _pack_base_path)
	return true


func _make_dir_recursive_safe(path: String) -> bool:
	var error = DirAccess.make_dir_recursive_absolute(path)
	if error != OK and error != ERR_ALREADY_EXISTS: 
		push_error("DirAccess: Failed to create directory: %s (Error: %s)" % [path, error])
		return false
	return true


func _write_metadata_file(datapack: DatapackModel, path: String) -> bool:
	var config = ConfigFile.new()
	var section = "Datapack"
	
	config.set_value(section, "guid", datapack.guid.to_string())
	config.set_value(section, "name", datapack.name)
	config.set_value(section, "version", datapack.version)
	config.set_value(section, "entry_point", DATAPACK_RESOURCE_FILENAME)
	
	var error = config.save(path)
	if error != OK:
		push_error("DatapackCreator: Failed to save metadata file at path '%s'. Error: %s" % [path, error])
		return false
		
	return true