"""Validate the offline code-to-evidence crosswalk. No network or truth/availability test.
Usage: python condition-evidence-check.py.txt [condition-evidence.json]
If comparison-conditions.json is present, also verify its exact bytes and rows.
"""
import hashlib,json,sys
from pathlib import Path
from uuid import UUID
p=Path(sys.argv[1]) if len(sys.argv)>1 else Path(__file__).with_name('condition-evidence.json')
d=json.loads(p.read_text(encoding='utf-8'))
assert d['format']=='search-korea-condition-evidence-v1'
by={f['code']:f for f in d['facts']}
assert len(by)==len(d['facts']),'duplicate fact code'
used={code for cell in d['cells'] for code in cell['factCodes']}
assert used==set(by),'unresolved or unused fact code'
assert len({(c['service'],c['criterion']) for c in d['cells']})==len(d['cells']),'duplicate comparison cell'
sources=set()
for f in by.values():
 UUID(f['id']);assert isinstance(f['version'],int) and f['version']>0
 assert f['statement'].strip() and f['sources']
 for s in f['sources']:
  UUID(s['id']);assert isinstance(s['version'],int) and s['version']>0
  assert s['url'].startswith('https://') and s['locators'] and all(v.strip() for v in s['locators'])
  sources.add(s['id'])
actual={'cells':len(d['cells']),'factCodes':len(by),'sources':len(sources)}
assert actual==d['expected'],(actual,d['expected'])
comparison=p.with_name('comparison-conditions.json')
if comparison.exists():
 assert hashlib.sha256(comparison.read_bytes()).hexdigest()==d['comparisonFileSha256'],'comparison bytes differ'
 assert json.loads(comparison.read_text(encoding='utf-8'))==d['cells'],'comparison rows differ'
print(json.dumps({'status':'crosswalk-complete','counts':actual,'comparisonFileChecked':comparison.exists(),'scope':'structural provenance validation; not live service verification'},ensure_ascii=False,indent=2))