"""Independent packaging audit and adversarial tests; never imports the packager."""
import sys,json,hashlib,copy,importlib.util
from pathlib import Path
from collections import Counter
import pyarrow.parquet as pq

ROOT=Path(__file__).resolve().parents[1]
spec=importlib.util.spec_from_file_location('contract',ROOT/'validator'/'validate.py')
v=importlib.util.module_from_spec(spec);spec.loader.exec_module(v)
def audit():
    rows=v.readrows(ROOT/'dataset.jsonl'); originals=v.originals(ROOT)
    vendor=ROOT/'validator'/'vendor';sys.path.insert(0,str(vendor))
    nav=v.module(vendor/'nav_check.py','nav_check');physics=v.module(vendor/'physics.py','physics');horizon=v.module(vendor/'horizon.py','horizon')
    nested=json.loads((ROOT/'serialization.json').read_text('utf8'))['nested_json_columns']
    restored=[]
    for split in ['train','validation','test','holdout']:
        raw=pq.read_table(ROOT/'data'/f'{split}.parquet').to_pylist()
        for r in raw:
            assert r['split']==split
            for k in nested:r[k]=v.strict(r[k])
        restored+=raw
    assert Counter(v.encoded(r) for r in rows)==Counter(v.encoded(r) for r in restored),'Parquet changed/omitted/duplicated rows'
    mutations=[]
    for domain in ['navigation','multi_agent','counterfactual','planning']:
        r=next(r for r in rows if r['domain']==domain and r['recovery_available'])
        s=originals[(r['provenance']['source_dataset'],r['provenance']['source_record_id'])]
        v.agent(r,s,nav,physics,horizon)
        for field,value in [('success',False),('recovery_action',None),('recovery_sequence',[]),('final_state',{}),('failure_type','fabricated'),('goal',{}),('action_history',[]),('cost_or_steps',{'cost':-99,'steps':-99}),('initial_state',{}),('failure_state',{})]:
            bad=copy.deepcopy(r);bad[field]=value
            try:v.agent(bad,s,nav,physics,horizon)
            except Exception as e:mutations.append({'domain':domain,'field':field,'rejected':True,'reason':str(e)})
            else:raise AssertionError(f'Mutation survived: {domain}/{field}')
    return {'status':'PASS','lossless_parquet_rows':len(restored),'controlled_corruptions':len(mutations),'rejected_corruptions':len(mutations),'tests':mutations,'scope':'Lossless serialization and deliberate trajectory corruptions across every domain; full source/oracle audit is validator/validate.py.'}
if __name__=='__main__':
    report=audit();(ROOT/'package_validation.json').write_text(json.dumps(report,indent=2)+'\n',encoding='utf8');print(json.dumps({k:v for k,v in report.items() if k!='tests'}))