#!/usr/bin/env python3
"""Create a minimal valid FAISS HNSW32 + IndexIDMap2 fixture for the test harness.

Used by the `tile-init` init service in docker-compose.test.jetson.yml.
Writes three files to /var/lib/gps-denied/tiles/ via the shared
`tests.e2e.replay._faiss_seed.seed_empty_faiss_index` helper (AZ-964):

  descriptor.index          — empty HNSW32 dim=512 binary
  descriptor.index.sha256   — sha256 sidecar (matches FaissDescriptorIndex._load)
  descriptor.index.meta.json — metadata (descriptor_dim, hnsw_params.metric, ...)

Running this twice is idempotent (overwrites the previous fixture).
"""

from __future__ import annotations

import sys
from pathlib import Path

# Make the repo root importable so `tests.e2e.replay._faiss_seed` resolves
# when this script runs in the `tile-init` compose service (which mounts
# the repo at /opt/project but doesn't add it to PYTHONPATH).
_REPO_ROOT = Path(__file__).resolve().parent.parent
if str(_REPO_ROOT) not in sys.path:
    sys.path.insert(0, str(_REPO_ROOT))

from tests.e2e.replay._faiss_seed import seed_empty_faiss_index  # noqa: E402


def main() -> int:
    idx_path = seed_empty_faiss_index(Path("/var/lib/gps-denied/tiles"))
    sha256_path = idx_path.parent / (idx_path.name + ".sha256")
    sha256 = sha256_path.read_text(encoding="ascii").strip()
    print(
        f"[tile-init] OK: empty HNSW32 index at {idx_path}  "
        f"sha256={sha256[:16]}..."
    )
    return 0


if __name__ == "__main__":
    sys.exit(main())