"""Lightweight checksum-specific upload gate; no model import in uploader."""
import json
from pathlib import Path
import sqlite3

ROOT=Path(__file__).resolve().parents[1]
STATE=ROOT/'experiments/minor-safety'
MINOR_GROUPS={'baby','preschool','younger_schoolchild','older_schoolchild','younger_teen','older_teen'}

def approved_shard(source_connection,name):
    if not (STATE/'request.json').exists():return True
    rows=list(source_connection.execute("SELECT id,metadata FROM images WHERE shard=?",(name,)))
    selected=[(r['id'],json.loads(r['metadata'])['image_sha256']) for r in rows
        if json.loads(r['metadata'])['age_group'] in MINOR_GROUPS]
    if not selected:return True
    if any('safety_regeneration_attempt' in json.loads(r['metadata']) for r in rows) and not (STATE/'repair-quality-gate-passed.json').exists():return False
    if not (STATE/'scores.sqlite').exists():return False
    policy=json.loads((STATE/'policy.json').read_text())['policy_sha256']
    if any(json.loads(r['metadata']).get('safety_regeneration_policy_sha256')==policy for r in rows):
        if not (STATE/f'repair-quality-gate-{policy}.json').exists():return False
    c=sqlite3.connect(STATE/'scores.sqlite')
    try:
        for ident,digest in selected:
            row=c.execute('SELECT decision FROM scores WHERE id=? AND image_sha256=? AND policy_sha256=?',(ident,digest,policy)).fetchone()
            if row is None or row[0]!='pass':return False
        return True
    finally:c.close()