#!/usr/bin/env bash
# provision-wifi.sh — join a Uno Q board to the workshop WiFi over adb and persist
# it. NetworkManager saves the connection profile, so the board auto-reconnects on
# every boot. The board reaches the cloud brain (api.anthropic.com) NAT'd out
# through this WiFi, so every workshop board needs it.
#
# The venue network is baked in as the default (override with WIFI_SSID/WIFI_PASS).
#
# Usage:
#   ./provision-wifi.sh                 # first attached board
#   ./provision-wifi.sh <adb-serial>    # a specific board
#   # every attached board at once:
#   for s in $(adb devices | awk 'NR>1 && $2=="device"{print $1}'); do ./provision-wifi.sh "$s"; done
set -uo pipefail

# ── workshop WiFi (FabLab Torino) — override per venue with WIFI_SSID / WIFI_PASS ──
WIFI_SSID="${WIFI_SSID:-Fablab_Torino}"
WIFI_PASS="${WIFI_PASS:-Fablab.Torino!}"

S="${1:-$(adb devices 2>/dev/null | awk '/\tdevice$/{print $1; exit}')}"
[ -n "$S" ] || { echo "provision-wifi: no board attached over USB" >&2; exit 1; }

echo "==> [$S] joining WiFi '$WIFI_SSID'"
# Idempotent: if a saved profile already exists, just bring it up; otherwise scan
# and create it (a persistent NetworkManager profile that auto-reconnects on boot).
adb -s "$S" shell "nmcli radio wifi on >/dev/null 2>&1; sleep 1
if nmcli -t -f NAME connection show 2>/dev/null | grep -qx '$WIFI_SSID'; then
  nmcli connection up '$WIFI_SSID'
else
  nmcli device wifi rescan >/dev/null 2>&1; sleep 4
  nmcli device wifi connect '$WIFI_SSID' password '$WIFI_PASS'
fi" 2>&1 | sed 's/^/  /'

# verify link + that the cloud is reachable through it
adb -s "$S" shell 'ip -brief addr show wlan0 2>/dev/null | sed "s/^/  wlan0: /"'
if adb -s "$S" shell 'getent hosts api.anthropic.com >/dev/null 2>&1'; then
  echo "  cloud DNS: resolves ✓ — board can reach the agent brain"
else
  echo "  cloud DNS: FAILS — check WiFi coverage / credentials" >&2
  exit 1
fi