"""Approval handling — maps Matrix reactions to pipeline approvals."""

import logging

logger = logging.getLogger(__name__)

# Reaction emoji to response mapping
APPROVAL_REACTIONS = {
    "\U0001f44d": "approve",       # thumbs up
    "\U0001f44e": "decline",       # thumbs down
    "\u2705": "approve",           # check mark
    "\u274c": "decline",           # cross mark
}


def reaction_to_response(reaction_key: str) -> str | None:
    """Map a reaction emoji to an approval response."""
    # Strip variation selectors (U+FE0E, U+FE0F) — Element often appends these
    cleaned = reaction_key.replace("\ufe0f", "").replace("\ufe0e", "")
    return APPROVAL_REACTIONS.get(cleaned) or APPROVAL_REACTIONS.get(reaction_key)