"""launcher.exe: checks for a newer LedgerBot build, installs it, then starts LedgerBot.exe."""
import json
import subprocess
import sys
import urllib.request
import zipfile
from pathlib import Path

from app import VERSION

UPDATE_URL = "https://updates.example.test/ledgerbot/latest.json"
BASE = Path(sys.executable).parent


def latest():
    try:
        with urllib.request.urlopen(UPDATE_URL, timeout=10) as r:
            return json.load(r)
    except Exception:
        return None  # offline, or the server's certificate is not trusted: run the current build


def main():
    info = latest()
    if info and info["version"] != VERSION:
        zip_path = BASE / "update.zip"
        urllib.request.urlretrieve(info["zip_url"], zip_path)
        with zipfile.ZipFile(zip_path) as z:
            z.extractall(BASE)
    subprocess.Popen([str(BASE / "LedgerBot.exe"), *sys.argv[1:]])


if __name__ == "__main__":
    main()