"""Guard against the fastapi Lambda's unzipped package exceeding AWS's
262144000 byte (250 MiB) limit.

dev deployed with `InvalidParameterValueException: Unzipped size must be
smaller than 262144000 bytes` for several weeks (2026-06-15 to 2026-07-03)
before anyone noticed, because the failure only ever surfaced deep inside
`terraform apply` on a push to dev/prod — well after a PR to main had merged.
This runs the same check as part of the PR-gated test suite so a regression
(e.g. a large fixture or dependency landing outside the Lambda's zip_excludes)
fails the PR instead of the dev deploy.

Runs the real `check_lambda_zip_size.py` script as a subprocess (not an
in-process import) so this exercises exactly what a human or CI would run
locally: `python3 backend/app/requirements/check_lambda_zip_size.py`.
"""
from __future__ import annotations

import subprocess
import sys
from pathlib import Path

REPO_ROOT = Path(__file__).resolve().parents[1]
CHECK_SCRIPT = REPO_ROOT / "backend/app/requirements/check_lambda_zip_size.py"


def test_fastapi_lambda_unzipped_size_within_aws_limit() -> None:
    result = subprocess.run(
        [sys.executable, str(CHECK_SCRIPT)],
        cwd=REPO_ROOT,
        capture_output=True,
        text=True,
    )
    print(result.stdout)
    assert result.returncode == 0, (
        "fastapi Lambda's projected unzipped size exceeds (or is dangerously "
        "close to) AWS's 250 MiB limit — see output above. If this is a real "
        "new dependency/fixture, either trim it or extend `zip_excludes` in "
        "deployment/terraform/modules/lambda_with_api_gateway/variables.tf "
        "(only if it's not needed by the Lambda at runtime).\n"
        + result.stdout
        + result.stderr
    )