#!/usr/bin/env python3

import base64
import json
import os
import sys


def main():
    raw_json = os.environ.get("OPTIONS_B64_JSON", "[]").strip()

    try:
        options_b64 = json.loads(raw_json)
    except json.JSONDecodeError as exc:
        print(f"FEHLER: OPTIONS_B64_JSON ist kein gültiges JSON: {exc}", file=sys.stderr)
        sys.exit(1)

    options = []

    for raw in options_b64:
        if not raw:
            continue

        raw = str(raw).strip()
        if not raw:
            continue

        try:
            decoded = base64.b64decode(raw).decode("utf-8")
            options.extend(json.loads(decoded))
        except Exception as exc:
            print(f"WARNUNG: Ein Host-Ergebnis konnte nicht gelesen werden: {exc}", file=sys.stderr)

    options = sorted(set(options))

    with open("select_options.json", "w", encoding="utf-8") as f:
        json.dump(options, f, indent=2, ensure_ascii=False)

    print("==========================================")
    print("Dropdown-Liste gebaut")
    print(f"Dropdown-Optionen: {len(options)}")
    print("==========================================")

    print("")
    print("Dropdown-Liste:")
    print(json.dumps(options, indent=2, ensure_ascii=False))


if __name__ == "__main__":
    main()