#!/usr/bin/env python3
"""Auto-update poller — this is what makes 'push' updates work.

Runs headless alongside the other watchers (launched by start-all.ps1). Every few
minutes it asks the public repo for the latest commit; when it changes (i.e. new
watcher code was published from Rocky), it pulls the update and restarts the
watchers automatically — within ~3 minutes, no logon/daily wait. Publishing new
code IS the push.

It updates the data watchers but not itself; its own code refreshes on the next
logon/daily update.py run (which restarts everything cleanly).
"""
import glob
import json
import os
import sys
import time
import urllib.request

HERE = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, HERE)
import update as u                       # update_code(), restart_mining_watchers()

BRANCH_API = ("https://git.armoredarmadillo.com/api/v1/repos/"
              "brockdarnold/eve-watcher/branches/main")
MARKER = os.path.join(HERE, ".update_sha")
POLL = 180                              # seconds between checks (~3 min)


def latest_sha():
    req = urllib.request.Request(BRANCH_API, headers={"User-Agent": "eve-watcher-updater"})
    return json.load(urllib.request.urlopen(req, timeout=20))["commit"]["id"]


def read_marker():
    try:
        return open(MARKER).read().strip()
    except Exception:
        return ""


def write_marker(s):
    try:
        with open(MARKER, "w") as f:
            f.write(s)
    except Exception:
        pass


def main():
    print("[autoupdate] poller started")
    if not read_marker():               # seed so we don't update on the very first tick
        try:
            write_marker(latest_sha())
        except Exception:
            pass
    while True:
        time.sleep(POLL)
        try:
            sha = latest_sha()
        except Exception as e:
            print(f"[autoupdate] sha check failed: {e}")
            continue
        if not sha or sha == read_marker():
            continue
        print(f"[autoupdate] new version {sha[:7]} published — updating...")
        try:
            u.update_code()                                  # git or zip
            u.restart_mining_watchers()                      # onto the new code
            write_marker(sha)
            print("[autoupdate] updated + restarted watchers.")
        except Exception as e:
            print(f"[autoupdate] update failed: {e}")


if __name__ == "__main__":
    main()