"""Construct and verify a fictional export package. No customer system is accessed."""
import csv,hashlib,io,json,zipfile
from pathlib import Path
p=Path(__file__).parent
payload={'records.csv':b'record_id,title,attachment_path\nr1,Example note,files/note.txt\nr2,Second example,\n','files/note.txt':b'Fictional attachment for the export handoff example.\n'}
manifest=dict(format='dreamtsoft-editorial-example-v1',fictional=True,export_id='example-export-1',tenant='example-workspace',cutoff='illustrative snapshot A',encoding='UTF-8',delimiter=',',records=2,attachments=1,excluded=['credentials','billing records','audit log'],files=[dict(path=k,bytes=len(v),sha256=hashlib.sha256(v).hexdigest()) for k,v in payload.items()])
def verify(m,files):
    expected={f['path'] for f in m['files']}
    if set(files)!=expected:return 'file inventory mismatch'
    for f in m['files']:
        raw=files[f['path']]
        if len(raw)!=f['bytes'] or hashlib.sha256(raw).hexdigest()!=f['sha256']:return 'payload mismatch'
    records=list(csv.DictReader(io.StringIO(files['records.csv'].decode('utf-8'),newline='')))
    if len(records)!=m['records']:return 'record count mismatch'
    if len(files)-1!=m['attachments']:return 'attachment count mismatch'
    if len({r['record_id'] for r in records})!=len(records):return 'duplicate record identity'
    if any(r['attachment_path'] and r['attachment_path'] not in files for r in records):return 'missing attachment reference'
    return 'valid fixture'
assert verify(manifest,payload)=='valid fixture'
missing=dict(payload);del missing['files/note.txt']
changed=dict(payload);changed['files/note.txt']+=b'changed'
checks=dict(scope='fictional package fixture only',complete=verify(manifest,payload),missing_attachment=verify(manifest,missing),changed_payload=verify(manifest,changed))
assert checks['missing_attachment']=='file inventory mismatch' and checks['changed_payload']=='payload mismatch'
(p/'example-manifest.json').write_text(json.dumps(manifest,indent=2)+'\n')
with zipfile.ZipFile(p/'example-export.zip','w',compression=zipfile.ZIP_DEFLATED) as z:
    for name,data in {**payload,'manifest.json':(p/'example-manifest.json').read_bytes()}.items():
        info=zipfile.ZipInfo(name,date_time=(2026,9,5,0,0,0));info.compress_type=zipfile.ZIP_DEFLATED;z.writestr(info,data)
(p/'package-checks.json').write_text(json.dumps(checks,indent=2)+'\n')
print(json.dumps(checks,indent=2))