"""Decision labels for queue items from the singlepass bundle thresholds.

Rule (shared by build_gold_queue.py and rescore_singlepass.py so every
queue files the same vocabulary):

    keep        score >= per-origin best-F1 threshold (thresholds.json)
    drop        score <= DROP_FLOOR  (confident reject, repo 0.05 edge)
    confusion   everything between — the human-review zone (was "mid")
    unscored    score missing (out-of-grid span / not yet rescored)

Per-origin table (published singlepass bundle, best-F1):

    fcv_pads_east_africa 0.5 · general_prwp 0.4 · jad_paddy_docs 0.1
    jdc_operational 0.6 · refugee_pads 0.5 · reliefweb 0.4
    fallback: global_best 0.5
"""

import json
from pathlib import Path

DROP_FLOOR = 0.05

_THR: dict | None = None


def load_thresholds() -> dict:
    """Published singlepass thresholds; mirror of the bundle's thresholds.json."""
    global _THR
    if _THR is None:
        p = (Path(__file__).resolve().parent.parent / "outputs"
             / "gliner-datause-catchall-infer-probe" / "thresholds.json")
        _THR = json.loads(p.read_text()) if p.exists() else {}
    return _THR


def decide(score, origin, thresholds: dict | None = None) -> str:
    if score is None:
        return "unscored"
    t = thresholds if thresholds is not None else load_thresholds()
    thr = (t.get("per_origin") or {}).get(origin, {}).get("thr")
    if thr is None:
        thr = (t.get("global_best") or {}).get("thr", 0.5)
    if score >= thr:
        return "keep"
    if score <= DROP_FLOOR:
        return "drop"
    return "confusion"