import json
import os
from argparse import Namespace, _SubParsersAction

from mdrsclient.api import FileApi
from mdrsclient.commands.base import BaseCommand
from mdrsclient.exceptions import IllegalArgumentException


class FileMetadataCommand(BaseCommand):
    @classmethod
    def register(cls, parsers: _SubParsersAction) -> None:
        command = cls()
        file_metadata_parser = parsers.add_parser("file-metadata", help="get the file metadata")
        file_metadata_parser.add_argument("-p", "--password", help="password to use when open locked folder")
        file_metadata_parser.add_argument("remote_path", help="remote file path (remote:/lab/path/file)")
        file_metadata_parser.set_defaults(func=command.file_metadata)

    def file_metadata(self, args: Namespace) -> None:
        (remote, laboratory_name, r_path) = self._parse_remote_host_with_path(args.remote_path)
        r_path = r_path.rstrip("/")
        r_dirname = os.path.dirname(r_path)
        r_basename = os.path.basename(r_path)
        connection = self._create_connection(remote)
        laboratory = self._find_laboratory(connection, laboratory_name)
        folder = self._find_folder(connection, laboratory, r_dirname, args.password)
        file = folder.find_file(r_basename)
        if file is None:
            raise IllegalArgumentException(f"File `{r_basename}` not found.")
        file_api = FileApi(connection)
        metadata = file_api.metadata(file)
        print(json.dumps(metadata, ensure_ascii=False))