# Derived from https://github.com/jegor377/godot-gdgifexporter

@tool
extends EditorImportPlugin


func _can_import_threaded():
	return false


func _get_priority():
	return 100


func _get_import_order():
	# 数字越小越提前
	return ResourceImporter.IMPORT_ORDER_DEFAULT - 100


func _get_importer_name():
	return "gif.animated.texture.plugin"


func _get_visible_name():
	return "Sprite Frames (Thread Safe)"


func _get_recognized_extensions():
	return ["gif"]


func _get_save_extension():
	return "tres"


func _get_resource_type():
	return "SpriteFrames"


func _get_preset_count():
	return 0


func _get_preset_name(i):
	return ""


func _get_import_options(_path, _i):
	return []


func _get_option_visibility(path: String, option_name: StringName, options: Dictionary) -> bool:
	return false


# 防止同时加载多个文件时卡死
static var MUTEX = Mutex.new()


func _import(source_file, save_path, options, platform_variants, gen_files):
	if GifManager == null:
		printerr("GifManager is not available!")
		return FAILED
	var file = FileAccess.open(source_file, FileAccess.READ)
	var buffer = file.get_buffer(file.get_length())
	file.close()
	MUTEX.lock()
	var frames = GifManager.sprite_frames_from_buffer(buffer, 0, 30)
	var filename = save_path + "." + _get_save_extension()
	var code = ResourceSaver.save(frames, filename)
	# await get_tree().create_timer(0.1).timeout
	MUTEX.unlock()
	print_debug("Imported GIF frames: ", frames.get_frame_count("gif"), " from ", source_file)
	return code