#!/bin/bash
# Surveille la connexion WiFi et la rétablit si elle tombe.
# Conçu pour Surface Pro (wlan0) — lancé par cron ou systemd timer.

IFACE="wlan0"
GATEWAY=$(ip route show default dev "$IFACE" 2>/dev/null | awk '{print $3}' | head -1)
LOG_TAG="wifi-watchdog"

if [ -z "$GATEWAY" ]; then
    logger -t "$LOG_TAG" "Pas de gateway sur $IFACE, tentative reconnexion..."
    nmcli device connect "$IFACE" 2>&1 | logger -t "$LOG_TAG"
    sleep 5
    GATEWAY=$(ip route show default dev "$IFACE" 2>/dev/null | awk '{print $3}' | head -1)
fi

if [ -n "$GATEWAY" ]; then
    if ! ping -c 2 -W 3 -I "$IFACE" "$GATEWAY" > /dev/null 2>&1; then
        logger -t "$LOG_TAG" "Ping gateway $GATEWAY echoue, reconnexion WiFi..."
        nmcli device disconnect "$IFACE" 2>&1 | logger -t "$LOG_TAG"
        sleep 2
        nmcli device connect "$IFACE" 2>&1 | logger -t "$LOG_TAG"
        sleep 5
        if ! ping -c 2 -W 3 -I "$IFACE" "$GATEWAY" > /dev/null 2>&1; then
            logger -t "$LOG_TAG" "Toujours pas de connexion, restart NetworkManager..."
            systemctl restart NetworkManager
        fi
    fi
fi