import hashlib
import importlib.util
import json
from pathlib import Path

MODEL = Path(__file__).resolve().parent
ROOT = Path('/data/digital-drosophila')
EXP = ROOT/'experiments/phase4af-author-fullgraph'
AD = ROOT/'experiments/phase4ad-author-semantics'
AE_MODEL = ROOT/'models/male-cns-lif/author-runtime-lab-v1'
AE_EXP = ROOT/'experiments/phase4ae-author-runtime'
CFG = json.loads((MODEL/'config.json').read_text(encoding='utf-8'))

def digest(path):
    h = hashlib.sha256()
    with Path(path).open('rb') as f:
        for b in iter(lambda: f.read(8<<20), b''): h.update(b)
    return h.hexdigest()

def save(path, value):
    path = Path(path); path.parent.mkdir(parents=True, exist_ok=True)
    with path.open('x', encoding='utf-8') as f:
        json.dump(value, f, indent=2, ensure_ascii=False, allow_nan=False); f.write('\n')

def sources():
    return {p.name: digest(p) for p in sorted(MODEL.iterdir())
            if p.is_file() and p.name not in ('manifest.json', 'checksums.sha256')}

def check():
    p = json.loads((EXP/'protocol/preregistered.json').read_text())
    assert sources() == p['sources'], 'Source changed after preregistration'
    for row in p['inputs']:
        assert digest(ROOT/row['path']) == row['sha256'], row['path']
    for row in json.loads((EXP/'protocol/graph-case-hashes.json').read_text()):
        assert digest(EXP/row['path']) == row['sha256'], row['path']
    return p

def integrity():
    spec = importlib.util.spec_from_file_location('previous_ae_context', AE_MODEL/'context.py')
    previous = importlib.util.module_from_spec(spec); spec.loader.exec_module(previous)
    result = previous.integrity()
    import sys
    sys.path.insert(0, str(ROOT/'models/male-cns-lif/terminal-scope-diagnostic-v1'))
    from diagnostic import manifest_check
    for p in (AE_MODEL, AE_EXP):
        result[str(p.relative_to(ROOT))] = manifest_check(p, digest)
    assert all(r['pass'] for r in result.values())
    return result

def output_bytes():
    return sum(p.stat().st_size for p in EXP.rglob('*') if p.is_file())

def budget_check():
    assert output_bytes() < CFG['new_output_budget_bytes'], 'New output budget exceeded'