import dcc.config
import io
import json
import pathlib
import urllib.request
import zipfile


class Fetch(dcc.config.Base):
    def get_parser(self, prog_name):
        parser = super().get_parser(prog_name)
        parser.add_argument("id_or_name")
        return parser

    def take_action(self, parsed_args):
        idgames_id = parsed_args.id_or_name
        if not parsed_args.id_or_name.isdigit():
            idgames_id = self.search_idgames(parsed_args.id_or_name)

        with urllib.request.urlopen(
            "https://www.doomworld.com/idgames/api/" +
            "api.php?action=get&id={}&out=json".format(idgames_id)
        ) as response:
            reply = json.loads(response.read())
            rpath = "/".join([
                self.fetch_mirror,
                reply["content"]["dir"],
                reply["content"]["filename"]
            ])
            wad = reply["content"]["filename"][0:-4]

            with urllib.request.urlopen(rpath) as response:
                z = zipfile.ZipFile(io.BytesIO(response.read()))
                z.extractall(path=self.pwads.joinpath(wad))

    # TODO: explicit error handling.  Let users choose when >1 result.
    def search_idgames(self, wad):
        with urllib.request.urlopen(
            "https://www.doomworld.com/idgames/api/" +
            "api.php?action=search&query={}&out=json".format(wad)
        ) as response:
            reply = json.loads(response.read())
            files = reply["content"]["file"]
            if type(files) is dict:  # One result.
                return files["id"]
            else:  # More than one.  Zero will raise an error.
                return files[0]["id"]