#!/bin/bash
# RustDesk-Client unter Linux installieren und an remote.mhi-solutions.de binden.
# Aufruf als root:  bash rustdesk-install.sh [Passwort]
set -euo pipefail
ID_SERVER="remote.mhi-solutions.de"
KEY="+3Yr93wo45yw9gmAW6CDwNZ8YyZacjv1kYSfOudMBEA="
CONFIG_STRING="==Qfi0TQFJUTkV3TmNVWrFjdqNWYalXW4olT3R0Q2cVQtdWO3lXN082dzkjcZNzKiojI5V2aiwiIiojIpBXYiwiIlRmLz52bpRXds92ctkGat5SZ09WblJnI6ISehxWZyJCLiUGZuMnbvlGd1x2bz1Sao1mLlR3btVmciojI0N3boJye"
PASSWORD="${1:-$(tr -dc 'A-Za-z0-9' </dev/urandom | head -c 14)}"

[ "$(id -u)" -eq 0 ] || { echo "Bitte als root ausführen."; exit 1; }
. /etc/os-release
ARCH=$(uname -m); [ "$ARCH" = "x86_64" ] || { echo "Nur x86_64 vorgesehen (hier: $ARCH)."; exit 1; }
API="https://api.github.com/repos/rustdesk/rustdesk/releases/latest"
TMP=$(mktemp -d)
case "$ID" in
  debian|ubuntu|linuxmint|pop)
    URL=$(curl -fsSL "$API" | grep -oE 'https://[^"]+rustdesk-[0-9.]+-x86_64\.deb' | head -1)
    curl -fsSL "$URL" -o "$TMP/rustdesk.deb"
    DEBIAN_FRONTEND=noninteractive apt-get install -y "$TMP/rustdesk.deb" ;;
  fedora|rhel|centos|rocky|almalinux)
    URL=$(curl -fsSL "$API" | grep -oE 'https://[^"]+rustdesk-[0-9.]+-0\.x86_64\.rpm' | head -1)
    curl -fsSL "$URL" -o "$TMP/rustdesk.rpm"
    dnf install -y "$TMP/rustdesk.rpm" ;;
  opensuse*|sles)
    URL=$(curl -fsSL "$API" | grep -oE 'https://[^"]+rustdesk-[0-9.]+-0\.x86_64-suse\.rpm' | head -1)
    curl -fsSL "$URL" -o "$TMP/rustdesk.rpm"
    zypper --non-interactive install --allow-unsigned-rpm "$TMP/rustdesk.rpm" ;;
  *) echo "Distribution $ID nicht vorgesehen."; exit 1 ;;
esac
rm -rf "$TMP"

systemctl enable --now rustdesk >/dev/null 2>&1 || true
sleep 3
rustdesk --config "$CONFIG_STRING" || true
# Sicherheitsnetz: Serverdaten direkt in die Root-Konfiguration schreiben
CFG=/root/.config/rustdesk
mkdir -p "$CFG"
if ! grep -qs "$ID_SERVER" "$CFG/RustDesk2.toml"; then
cat > "$CFG/RustDesk2.toml" <<TOML
rendezvous_server = '$ID_SERVER:21116'
nat_type = 1
serial = 0

[options]
custom-rendezvous-server = '$ID_SERVER'
relay-server = '$ID_SERVER'
key = '$KEY'
TOML
fi
rustdesk --password "$PASSWORD" || true
systemctl restart rustdesk
sleep 2
RID=$(rustdesk --get-id 2>/dev/null || grep -oP "^id = '\K[^']+" "$CFG/RustDesk.toml" 2>/dev/null || echo "?")
echo
echo "RustDesk bereit"
echo "  Rechner : $(hostname)"
echo "  ID      : $RID"
echo "  Passwort: $PASSWORD"
echo "  Server  : $ID_SERVER"