@tool
extends EditorImportPlugin

const result_codes = preload("../config/result_codes.gd")

var config = preload("../config/config.gd").new()
var _aseprite_file_exporter = preload("../aseprite/file_exporter.gd").new()
var _sf_creator = preload("../creators/sprite_frames/sprite_frames_creator.gd").new()
var file_system: EditorFileSystem = EditorInterface.get_resource_filesystem()

func _get_importer_name():
	# ideally this should be called aseprite_wizard.plugin.spriteframes
	# but I'm keeping it like this to avoid unnecessary breaking changes
	return "aseprite_wizard.plugin"


func _get_visible_name():
	return "Aseprite SpriteFrames"


func _get_recognized_extensions():
	return ["aseprite", "ase"]


func _get_save_extension():
	return "res"


func _get_resource_type():
	return "SpriteFrames"


func _get_preset_count():
	return 1


func _get_preset_name(i):
	return "Default"


func _get_priority():
	return 2.0 if config.get_default_importer() == config.IMPORTER_SPRITEFRAMES_NAME else 1.0


func _get_import_order():
	return 1


func _get_import_options(_path, _i):
	return [
		{"name": "split_layers",           "default_value": false},
		{"name": "exclude_layers_pattern", "default_value": config.get_default_exclusion_pattern()},
		{"name": "only_visible_layers",    "default_value": false},
		{
			"name": "sheet_type",
			"default_value": "Packed",
			"property_hint": PROPERTY_HINT_ENUM,
			"hint_string": get_sheet_type_hint_string()
		},
	]


func _get_option_visibility(path, option, options):
	return true


static func get_sheet_type_hint_string() -> String:
	var hint_string := "Packed"
	for number in [2, 4, 8, 16, 32]:
		hint_string += ",%s columns" % number
	hint_string += ",Strip"
	return hint_string


func _import(source_file, save_path, options, platform_variants, gen_files):
	var absolute_source_file = ProjectSettings.globalize_path(source_file)
	var absolute_save_path = ProjectSettings.globalize_path(save_path)

	var source_path = source_file.get_base_dir()
	var source_basename = source_file.substr(source_path.length()+1, -1)
	source_basename = source_basename.substr(0, source_basename.rfind('.'))

	var export_mode = _sf_creator.LAYERS_EXPORT_MODE if options['split_layers'] else _sf_creator.FILE_EXPORT_MODE

	var aseprite_opts = {
		"export_mode": export_mode,
		"exception_pattern": options['exclude_layers_pattern'],
		"only_visible_layers": options['only_visible_layers'],
		"output_filename": '' if export_mode == _sf_creator.FILE_EXPORT_MODE else '%s_' % source_basename,
		"column_count" : int(options['sheet_type']) if options['sheet_type'] != "Strip" else 128,
		"output_folder": source_path,
	}

	var source_files = _aseprite_file_exporter.generate_aseprite_files(absolute_source_file, aseprite_opts)
	if not source_files.is_ok:
		printerr("ERROR - Could not import aseprite file: %s" % result_codes.get_error_message(source_files.code))
		return FAILED


	var should_trigger_scan = false

	for sf in source_files.content:
		if sf.is_first_import:
			file_system.update_file(sf.sprite_sheet)
			append_import_external_resource(sf.sprite_sheet)
		else:
			should_trigger_scan = true

	if should_trigger_scan:
		file_system.scan()

	var resources = _sf_creator.create_resources(source_files.content)

	if not resources.is_ok:
		printerr("ERROR - Could not import aseprite file: %s" % result_codes.get_error_message(resources.code))
		return FAILED

	if export_mode == _sf_creator.LAYERS_EXPORT_MODE:
		# each layer is saved as one resource using base file name to prevent collisions
		# the first layer will be saved in the default resource path to prevent
		# godot from keeping re-importing it
		for resource in resources.content:
			var resource_path = "%s.res" % resource.data_file.get_basename();
			var exit_code = ResourceSaver.save(resource.resource, resource_path)
			resource.resource.take_over_path(resource_path)

			if exit_code != OK:
				printerr("ERROR - Could not persist aseprite file: %s" % result_codes.get_error_message(exit_code))
				return FAILED

	var resource = resources.content[0]
	var resource_path = "%s.res" % save_path
	var exit_code = ResourceSaver.save(resource.resource, resource_path)
	resource.resource.take_over_path(resource_path)

	if config.should_remove_source_files():
		_remove_source_files(source_files.content)

	if exit_code != OK:
		printerr("ERROR - Could not persist aseprite file: %s" % result_codes.get_error_message(exit_code))
		return FAILED

	return OK


func _remove_source_files(source_files: Array):
	for s in source_files:
		DirAccess.remove_absolute(s.data_file)

	file_system.call_deferred("scan")