import obspython as obs
import subprocess
import os
from datetime import datetime

OVERLAY_SCRIPT = "/home/bashy/projects/HudFX_LNX/hudfx.py"
PYTHON_BIN = "/usr/bin/python3"
FLATPAK_SPAWN = "/usr/bin/flatpak-spawn"
LOG_FILE = "/home/bashy/projects/HudFX_LNX/hudfx.log"

process = None


def ts():
    return datetime.now().strftime("%Y-%m-%d %H:%M:%S")


def is_flatpak():
    return bool(os.environ.get("FLATPAK_ID")) or os.path.exists("/run/host/etc")


def build_cmd():
    if is_flatpak():
        return [FLATPAK_SPAWN, "--host", PYTHON_BIN, OVERLAY_SCRIPT]
    return [PYTHON_BIN, OVERLAY_SCRIPT]


def script_description():
    return "Starts HudFX overlay when OBS loads and stops it when OBS closes."


def script_load(settings):
    obs.obs_frontend_add_event_callback(on_event)
    mode = "Flatpak" if is_flatpak() else "native"
    print(f"[HudFX] {ts()} Script loaded (OBS mode: {mode})")


def on_event(event):
    if event == obs.OBS_FRONTEND_EVENT_FINISHED_LOADING:
        _start()
    elif event == obs.OBS_FRONTEND_EVENT_EXIT:
        _stop()


def script_unload():
    _stop()


def _start():
    global process
    if process is None or process.poll() is not None:
        try:
            log = open(LOG_FILE, "a")
            cmd = build_cmd()
            process = subprocess.Popen(cmd, env=os.environ.copy(), stdout=log, stderr=log)
            print(f"[HudFX] {ts()} Overlay started (pid {process.pid})")
            print(f"[HudFX] {ts()} Log: {LOG_FILE}")
        except Exception as e:
            print(f"[HudFX] {ts()} Failed to start overlay: {e}")


def _stop():
    global process
    if process and process.poll() is None:
        process.terminate()
        print(f"[HudFX] {ts()} Overlay stopped")
        process = None