"""
KS2 attainment data re-importer.

Triggers a full re-import of the KS2 CSV data by calling the backend's
admin endpoint. The backend owns the migration logic and CSV column mappings;
this module is a thin trigger so the re-import can be orchestrated via Kestra
like all other data sources.

The CSV files must already be present in the data volume under
  /data/{year}/england_ks2final.csv
(populated at deploy time from the repo's data/ directory).
"""
import time
import requests
from config import BACKEND_URL, ADMIN_API_KEY

HEADERS = {"X-API-Key": ADMIN_API_KEY}
POLL_INTERVAL = 30   # seconds between status checks
MAX_WAIT = 7200      # 2 hours


def download():
    """No download step — CSVs are shipped with the repo."""
    print("KS2 CSVs are bundled in the data volume; no download needed.")
    return {"skipped": True}


def load():
    """Trigger full KS2 re-import and poll until complete."""
    start_url = f"{BACKEND_URL}/api/admin/reimport-ks2?geocode=true"
    status_url = f"{BACKEND_URL}/api/admin/reimport-ks2/status"

    print(f"POST {start_url}")
    resp = requests.post(start_url, headers=HEADERS, timeout=30)
    resp.raise_for_status()
    print(f"Started: {resp.json()}")

    print(f"Polling {status_url} every {POLL_INTERVAL}s (max {MAX_WAIT // 60} min)...")
    elapsed = 0
    while elapsed < MAX_WAIT:
        time.sleep(POLL_INTERVAL)
        elapsed += POLL_INTERVAL

        sr = requests.get(status_url, headers=HEADERS, timeout=15)
        sr.raise_for_status()
        state = sr.json()
        print(f"  [{elapsed // 60}m] {state}")

        if state.get("done"):
            print("Re-import complete.")
            return state
        if not state.get("running"):
            raise RuntimeError(f"Re-import stopped unexpectedly: {state}")

    raise TimeoutError(f"KS2 re-import did not complete within {MAX_WAIT // 60} minutes")


if __name__ == "__main__":
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument("--action", choices=["download", "load", "all"], default="all")
    args = parser.parse_args()
    if args.action in ("download", "all"):
        download()
    if args.action in ("load", "all"):
        load()