"""Threshold-based routing of video-level confidence to MATCH / REVIEW / SKIP."""

import logging

logger = logging.getLogger(__name__)

MATCH  = "MATCH"
REVIEW = "REVIEW"
SKIP   = "SKIP"


def route(
    confidence: float,
    t_high: float = 0.75,
    t_low: float = 0.45,
) -> str:
    """Return the routing decision for a video-level confidence score."""
    if confidence >= t_high:
        decision = MATCH
    elif confidence >= t_low:
        decision = REVIEW
    else:
        decision = SKIP

    logger.debug("route: C=%.4f t_high=%.2f t_low=%.2f → %s", confidence, t_high, t_low, decision)
    return decision