#!/bin/bash
# Connect wlan0 to a client WiFi network, replacing the local hotspot.
# Called by launcher.php (wifi_connect action) with: $1=SSID  $2=PASSWORD
# All output is appended to logs/wifi_connect.log by the caller's redirect,
# but we also write timestamped lines here to make the log self-contained.

WIFI_LOG="/var/www/nebuleair_pro_4g/logs/wifi_connect.log"
DB="/var/www/nebuleair_pro_4g/sqlite/sensors.db"

log_wc() {
    local ts
    ts=$(date '+%Y-%m-%d %H:%M:%S')
    echo "[$ts] [connexion.sh] $*"
}

log_wc "================================================================"
log_wc "=== connexion.sh started ==="
log_wc "PID=$$ user=$(whoami)"
log_wc "SSID='$1' (len=${#1})"
log_wc "PASS=[HIDDEN] (len=${#2})"

if [ -z "$1" ]; then
    log_wc "ERROR: empty SSID, aborting"
    exit 1
fi
if [ -z "$2" ]; then
    log_wc "ERROR: empty PASSWORD, aborting"
    exit 1
fi

# Get deviceName for the hotspot fallback SSID (with busy timeout against lock)
DEVICE_NAME=$(sqlite3 -cmd ".timeout 5000" "$DB" "SELECT value FROM config_table WHERE key='deviceName'")
log_wc "deviceName from DB: '$DEVICE_NAME'"

# Fallback SSID derived from RPi serial if DB read failed or value is empty
if [ -z "$DEVICE_NAME" ]; then
    serial_number=$(cat /proc/cpuinfo | grep Serial | awk '{print substr($3, length($3) - 7)}')
    DEVICE_NAME="nebuleair-pro-$serial_number"
    log_wc "WARN: deviceName empty in DB, fallback to '$DEVICE_NAME'"
fi

# Snapshot NM state BEFORE we touch anything (helps debug)
log_wc "--- NetworkManager state BEFORE ---"
log_wc "wlan0 state: $(nmcli -g GENERAL.STATE device show wlan0 2>&1)"
log_wc "wlan0 connection: $(nmcli -g GENERAL.CONNECTION device show wlan0 2>&1)"
log_wc "active connections:"
nmcli -t -f NAME,TYPE,DEVICE connection show --active 2>&1 | while read -r line; do log_wc "  $line"; done

# Find and bring down any active wireless connection on wlan0 (the hotspot)
ACTIVE_HOTSPOT=$(nmcli -t -f NAME,TYPE,DEVICE connection show --active | grep ':802-11-wireless:wlan0' | cut -d: -f1)
if [ -n "$ACTIVE_HOTSPOT" ]; then
    log_wc "Disabling active wireless connection on wlan0: '$ACTIVE_HOTSPOT'"
    DOWN_OUT=$(sudo nmcli connection down "$ACTIVE_HOTSPOT" 2>&1)
    DOWN_RC=$?
    log_wc "nmcli connection down rc=$DOWN_RC out: $DOWN_OUT"
else
    log_wc "No active wireless connection on wlan0 (nothing to bring down)"
fi

log_wc "Sleeping 5s to let NM release wlan0..."
sleep 5

log_wc "--- Attempting nmcli wifi connect ---"
log_wc "Command: sudo nmcli device wifi connect '$1' password [HIDDEN]"
NMCLI_OUT=$(sudo nmcli device wifi connect "$1" password "$2" 2>&1)
NMCLI_RC=$?
log_wc "nmcli exit code: $NMCLI_RC"
log_wc "nmcli output: $NMCLI_OUT"

# Snapshot NM state AFTER attempt
log_wc "--- NetworkManager state AFTER ---"
log_wc "wlan0 state: $(nmcli -g GENERAL.STATE device show wlan0 2>&1)"
log_wc "wlan0 connection: $(nmcli -g GENERAL.CONNECTION device show wlan0 2>&1)"

if [ $NMCLI_RC -eq 0 ]; then
    log_wc "SUCCESS: connected to '$1'"
    sqlite3 -cmd ".timeout 5000" "$DB" "UPDATE config_table SET value='connected' WHERE key='WIFI_status'"
    log_wc "DB updated: WIFI_status = connected"
else
    log_wc "FAILURE: connection to '$1' failed (rc=$NMCLI_RC), restarting hotspot..."

    # Recreate hotspot with deviceName (or fallback) as SSID
    HS_OUT=$(sudo nmcli device wifi hotspot ifname wlan0 ssid "$DEVICE_NAME" password nebuleaircfg 2>&1)
    HS_RC=$?
    log_wc "nmcli hotspot rc=$HS_RC out: $HS_OUT"

    sqlite3 -cmd ".timeout 5000" "$DB" "UPDATE config_table SET value='hotspot' WHERE key='WIFI_status'"
    log_wc "DB updated: WIFI_status = hotspot"
    log_wc "Hotspot restarted with SSID: '$DEVICE_NAME'"
fi

log_wc "=== connexion.sh end ==="