"""Map module names to challenge types and back.

The frontend uses ``module`` to route a row to the right editor.
We keep two parallel maps and a single function for clarity.
"""

from .constants import WEB_EXPLOIT_MODULES


def challenge_type_for_module(module: str) -> str:
    """Return challenge type for a module name.

    Supports canonical challenge types AND topic names. New challenge
    types are wired by extending this function — no caller change required.
    """
    # Canonical challenge types
    if module in ("web-exploitation", "steganography"):
        return module
    # Topic names that map to web-exploitation
    if module in WEB_EXPLOIT_MODULES:
        return "web-exploitation"
    return "crypto"