#!/bin/bash
set -e

if [ "$EUID" -ne 0 ]; then
    echo " Veuillez exécuter ce script en tant que root."
    exit 1
fi

read -p " Entrez l'adresse IP statique à assigner (ex: 192.168.77.42): " STATIC_IP
NETMASK="255.255.255.0"
GATEWAY="192.168.77.254"
DNS_SERVERS=$(grep -m1 ^nameserver /etc/resolv.conf | awk '{print $2}')
[ -z "$DNS_SERVERS" ] && DNS_SERVERS="1.1.1.1 8.8.8.8"

IFACE=$(ip -o -4 route show to default | awk '{print $5}')
if [ -z "$IFACE" ]; then
    echo " Impossible de détecter l'interface réseau."
    exit 1
fi
echo " Interface détectée : $IFACE"

mkdir -p /etc/systemd/network
cat > /etc/systemd/network/20-static.network <<EOF
[Match]
Name=$IFACE

[Network]
Address=$STATIC_IP/24
Gateway=$GATEWAY
DNS=$DNS_SERVERS
EOF

systemctl disable --now networking || true
systemctl enable systemd-networkd
systemctl restart systemd-networkd

echo " IP statique configurée sur $IFACE : $STATIC_IP"

echo " Installation de Docker..."
apt update && apt install -y ca-certificates curl gnupg lsb-release
install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | \
    gpg --dearmor -o /etc/apt/keyrings/docker.gpg
chmod a+r /etc/apt/keyrings/docker.gpg
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
  https://download.docker.com/linux/debian \
  $(lsb_release -cs) stable" | \
  tee /etc/apt/sources.list.d/docker.list > /dev/null
apt update
apt install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
systemctl enable docker
systemctl start docker
CURRENT_USER=$(logname)
usermod -aG docker "$CURRENT_USER"

echo " Installation des outils système..."
apt install -y btop git curl vim bat duf eza

BASHRC="/home/$CURRENT_USER/.bashrc"
echo " Configuration des alias et du prompt dans $BASHRC..."

cat >> "$BASHRC" <<'EOT'

#  Aliases personnalisés
alias ll="eza -l"
alias la="eza -A"
alias dufhide="duf --hide special"
alias bat="batcat"

#  Prompt coloré minimal
PS1='\[\e[1;32m\]\u@\h:\[\e[0;36m\]\w\[\e[0m\]\$ '
EOT

chown "$CURRENT_USER:$CURRENT_USER" "$BASHRC"

echo ""
echo " Réseau statique OK, Docker installé, outils ajoutés"
echo " Déconnexion + reconnexion recommandée."
read -p " Redémarrer maintenant ? (o/N): " confirm
if [[ "$confirm" =~ ^[oO]$ ]]; then
    reboot
fi