#!/usr/bin/env python3
"""Download the Rejseplanen GTFS feed for the Copenhagen area.

STATUS: BLOCKED. Rejseplanen (journey planner) does not currently expose a
public GTFS download. This script documents the intended flow and exits
non-zero with guidance.

When a feed URL becomes available, set it here and the script will download
and unzip into data/raw/gtfs/.
"""
import sys
import urllib.request
import zipfile
from pathlib import Path

from _common import GTFS_RAW

# Fill in once access is granted. Likely candidates:
#   - Rejseplanen / DOT open-data portal
#   - a static GTFS zip provided on request
GTFS_URL = None  # e.g. "https://.../rejseplanen.zip"


def main():
    if not GTFS_URL:
        print(
            "download_gtfs: BLOCKED — no GTFS feed URL configured.\n"
            "Set GTFS_URL in this script once Rejseplanen grants access, then re-run.\n"
            "The OSM-only pipeline (build_area -> download_osm -> prepare -> render)\n"
            "is fully functional without GTFS; GTFS only enriches colours/stops.",
            file=sys.stderr,
        )
        sys.exit(2)
    GTFS_RAW.mkdir(parents=True, exist_ok=True)
    zip_path = GTFS_RAW / "feed.zip"
    print(f"downloading {GTFS_URL} -> {zip_path} ...", flush=True)
    urllib.request.urlretrieve(GTFS_URL, zip_path)
    with zipfile.ZipFile(zip_path) as z:
        z.extractall(GTFS_RAW)
    zip_path.unlink(missing_ok=True)
    print(f"extracted GTFS txt files into {GTFS_RAW}")


if __name__ == "__main__":
    main()