import dcc.config
import os


class List(dcc.config.ListerBase):
    def get_parser(self, prog_name):
        parser = super().get_parser(prog_name)
        parser.add_argument("target")
        parser.add_argument("--wad")
        return parser

    def take_action(self, parsed_args):
        match parsed_args.target:
            case "pwads":
                return (
                    ("pwads",), sorted(
                        (x.name,) for x in os.scandir(self.pwads) if x.is_dir()
                    )
                )
            case "iwads":
                return (
                    ("iwads",), sorted(
                        (x.name,) for x in
                        os.scandir(self.iwads) if x.is_file()
                    )
                )
            case "demos":
                return (
                    ("demos",), sorted(
                        (x.name,) for x in
                        os.scandir(self.demos.joinpath(parsed_args.wad))
                        if x.name.endswith(".lmp")
                    )
                )
            case "videos":
                return (
                    ("videos",), sorted(
                        (x.name,) for x in
                        os.scandir(self.fabricate.joinpath(parsed_args.wad))
                        if x.name.endswith(".mp4")
                    )
                )
            case _:
                raise Exception(f"unknown target {parsed_args.target}")