"""Base parser class for subcommands."""
from abc import ABC, abstractmethod
import argparse


class SubcommandParser(ABC):
    """Base class for subcommand parsers.

    Each subcommand parser defines:
    - name: Subcommand name (e.g., 'scrape')
    - help: Short help text
    - description: Long description (optional, defaults to help)
    - add_arguments(): Method to add command-specific arguments
    """

    @property
    @abstractmethod
    def name(self) -> str:
        """Subcommand name (e.g., 'scrape', 'github', 'package')."""
        pass

    @property
    @abstractmethod
    def help(self) -> str:
        """Short help text shown in command list."""
        pass

    @property
    def description(self) -> str:
        """Long description (defaults to help text)."""
        return self.help

    @abstractmethod
    def add_arguments(self, parser: argparse.ArgumentParser) -> None:
        """Add subcommand-specific arguments to parser.

        Args:
            parser: ArgumentParser for this subcommand
        """
        pass

    def create_parser(self, subparsers) -> argparse.ArgumentParser:
        """Create and configure subcommand parser.

        Args:
            subparsers: Subparsers object from main parser

        Returns:
            Configured ArgumentParser for this subcommand
        """
        parser = subparsers.add_parser(
            self.name,
            help=self.help,
            description=self.description
        )
        self.add_arguments(parser)
        return parser