#!/usr/bin/env bash
# Wrapper that activates local venv then executes embedded Python

DIR=$(dirname "$(readlink -f "$0")")
VENV=/opt/navka-relay/venv
PY="$VENV/bin/python"

if [[ ! -x $PY ]]; then
  echo "❌  venv missing: run install-navka-relay.sh first." >&2
  exit 1
fi

# shellcheck disable=SC2091
exec $PY - <<'PYCODE'
import os, socket, selectors, signal, sys
from evdev import InputDevice, ecodes

# --------- config via env ----------
DEV   = os.getenv("NAVKA_KBD", "/dev/input/event4")
IP    = os.getenv("NAVKA_IP",  "192.168.42.253")
PORT  = int(os.getenv("NAVKA_PORT", "4000"))
# -----------------------------------

# full HID tables (letters, numbers, F1-F12, arrows, etc.)
HID = {**{getattr(ecodes,f"KEY_F{i}"):i+53 for i in range(1,13)}}
for ev,h in {
  **{k:4+i for i,k in enumerate(range(ecodes.KEY_A,ecodes.KEY_Z+1))},
  **{k:30+i for i,k in enumerate(range(ecodes.KEY_1,ecodes.KEY_0+1))},
  ecodes.KEY_ENTER:40, ecodes.KEY_ESC:41, ecodes.KEY_BACKSPACE:42,
  ecodes.KEY_TAB:43,  ecodes.KEY_SPACE:44, ecodes.KEY_MINUS:45,
  ecodes.KEY_EQUAL:46, ecodes.KEY_LEFTBRACE:47, ecodes.KEY_RIGHTBRACE:48,
  ecodes.KEY_BACKSLASH:49, ecodes.KEY_SEMICOLON:51, ecodes.KEY_APOSTROPHE:52,
  ecodes.KEY_GRAVE:53, ecodes.KEY_COMMA:54, ecodes.KEY_DOT:55,
  ecodes.KEY_SLASH:56, ecodes.KEY_RIGHT:79, ecodes.KEY_LEFT:80,
  ecodes.KEY_DOWN:81,  ecodes.KEY_UP:82
}.items(): HID.setdefault(ev, h)

MOD = { ecodes.KEY_LEFTCTRL:1, ecodes.KEY_LEFTSHIFT:2, ecodes.KEY_LEFTALT:4,
        ecodes.KEY_LEFTMETA:8, ecodes.KEY_RIGHTCTRL:16, ecodes.KEY_RIGHTSHIFT:32,
        ecodes.KEY_RIGHTALT:64, ecodes.KEY_RIGHTMETA:128 }

try:
    dev = InputDevice(DEV)
except FileNotFoundError:
    sys.exit(f"Input device {DEV} not found")

dev.grab()
sock = socket.create_connection((IP,PORT), timeout=5)
sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)

mods, keys = 0, []

def send():
    sock.sendall(bytes([mods,0]+keys[:6]+[0]*(6-len(keys))))

def quit_handler(sig, frame):     # graceful Ctrl-C
    dev.ungrab(); sock.close(); sys.exit(0)

signal.signal(signal.SIGINT, quit_handler)

for ev in dev.read_loop():
    if ev.type != ecodes.EV_KEY: continue
    pressed = ev.value == 1
    if ev.code in MOD:
        mods = mods | MOD[ev.code] if pressed else mods & ~MOD[ev.code]
    elif ev.code in HID:
        h = HID[ev.code]
        if pressed and h not in keys: keys.insert(0,h)
        elif not pressed and h in keys: keys.remove(h)
    else:
        continue
    send()
PYCODE