#!/usr/bin/env python3
"""Verify CSV output is valid.

Exit-safe since 2026-10-27 (Q63's STRIPPED_ASSERT class, found by
volt's Q65 census pass at `c64e39d`): every check below was an `assert`, so
`python3 -O` -- which compiles asserts away -- printed PASS and exited 0
against a wrong CSV. `assert` is not a failure path; `_check` raises.
The subject and the messages are unchanged; the only difference is that a
failing check now survives -O.
"""

import csv
import json
import sys


def _check(cond, message):
    if not cond:
        print("FAIL: " + message, file=sys.stderr)
        raise SystemExit(1)


# Verify CSV is valid
with open('/root/.hermes/wizard-outputs/spark/output.csv', 'r') as f:
    reader = csv.DictReader(f)
    rows = list(reader)

_check(len(rows) == 2, f"Expected 2 rows, got {len(rows)}")
_check('name' in rows[0], "Missing 'name' column")
_check(rows[0]['name'] == 'Alice Smith', f"Wrong name: {rows[0]['name']}")

# Verify the JSON source was correctly processed
with open('/root/.hermes/wizard-outputs/spark/sample_data.json', 'r') as f:
    source = json.load(f)

_check(len(source) == 2, "Source JSON should have 2 records")

print("PASS: CSV is valid with correct data structure")
print(f"Records: {len(rows)}")
print(f"Columns: {sorted(rows[0].keys())}")