@dataclass_json
@dataclasses.dataclass
class SnapshotMetadata:
    archive_time: str = ''
    archive_user: str = ''
    block_cnt_new: int = 0
    block_cnt_total: int = 0
    block_list: list = dataclasses.field(default_factory = lambda: [])
    close_time: str = ''
    close_user: str = ''
    create_time: str = ''
    create_user: str = ''
    field_snapshot_type: str = 'pd'
    new_block_list: list = dataclasses.field(default_factory = lambda: [])
    opened: bool = 1
    snapshot_block_types: list = dataclasses.field(default_factory = lambda: ['dft_inserted', 'lif_inserted', 'post_dfm'])
    snapshot_desc: str = "This is a default snapshot description, please change it with <snapshot config set snapshot_desc>"
    snapshot_parent: str = ''
    snapshot_target: list = dataclasses.field(default_factory = lambda: ['pd', 'top'])
    snapshot_type: str = 'pd'
    update_time: str = ''
    update_user: str = ''
    views: list = dataclasses.field(default_factory = lambda: ['db', 'lef', 'def', 'netlist', 'spef', 'gds'])
    views_mandatory: list = dataclasses.field(default_factory = lambda: ['db'])

@dataclass_json
@dataclasses.dataclass
class View:
    name: str = ''
    path: str = ''
    view_metadata: dict = dataclasses.field(default_factory = lambda: {
        'owner': '',
        'pnr_rev': '',
        'pnr_rev_id': 0,
        'view_revision': 0})

@dataclass_json
@dataclasses.dataclass
class Block:
    name: str = ''
    block_type: str = ''
    views: List[View] = dataclasses.field(default_factory = lambda: [])

@dataclass_json
@dataclasses.dataclass
class SnapshotData:
    '''Class for storing & manipulating snapshot data with constructor
    and methods (ex: eq method) created automatically'''

    name: str = ''
    snapshot_blocks: List[Block] = dataclasses.field(default_factory = lambda: [])
    snapshot_metadata: SnapshotMetadata = SnapshotMetadata()

    def create_dict(self):
        dict_object = dataclasses.asdict(self)
        new_dict = {}
        new_dict['snapshot'] = dict_object
        return new_dict

    def write_to_file(self, snap_name, type):
        snapshot_path = _get_global_snapshot_path(snap_name, type)

        # check if the parent of the file exists; if not, it will be created
        if not os.path.exists(os.path.dirname(os.path.abspath(snapshot_path))):
            try:
                os.mkdir(os.path.dirname(os.path.abspath(snapshot_path)))
            except:
                print('Error: Could not create the parent directory of the snapshot. \
Please enter a valid path to the parent directory.')
                sys.exit()
        # write the data to file
        with open(snapshot_path, 'w+') as snap_data_file:
            yaml.dump(self.create_dict(), snap_data_file, default_flow_style=False)
        print('Snapshot created/updated at %s' % snapshot_path)


    @classmethod
    def load_dict_from_file(cls, path):
        with open(path, 'r') as file:
            snapshot_dict = yaml.load(file, Loader=yaml.FullLoader)['snapshot']
            #print(snapshot_dict)
        # return SnapshotData(**snapshot_dict)
        return cls.from_dict(snapshot_dict)