#!/bin/bash
set -e
CHROOT_USER=torus
CHROOT_GROUP=torus
INSTALL_DIR=/opt/torus
HOME_DIR=/home/torus
SOCK_PATH=$HOME_DIR/torus.sock
DATA_PATH=$HOME_DIR/torus.dat
PID_PATH=/var/run/torus.pid
if [ "$EUID" -ne 0 ]; then 
    exit 1
fi
if ! id "$CHROOT_USER" &>/dev/null; then
    useradd -r -m -s /bin/bash "$CHROOT_USER"
fi
passwd -d "$CHROOT_USER" 2>/dev/null || usermod -p "" "$CHROOT_USER"
mkdir -p "$INSTALL_DIR"
mkdir -p "$HOME_DIR"
mkdir -p /var/www/ascii.town
cp -f client server image merge meta "$INSTALL_DIR/"
chmod +x "$INSTALL_DIR"/*
if [ -f default8x16.psfu ]; then
    mkdir -p "$HOME_DIR/usr/share/torus"
    cp -f default8x16.psfu "$HOME_DIR/usr/share/torus/"
fi
if [ -f explore.html ] && [ -f index.html ]; then
    cp -f explore.html index.html /var/www/ascii.town/
    chown -R "$CHROOT_USER:$CHROOT_GROUP" /var/www/ascii.town
fi
chown -R "$CHROOT_USER:$CHROOT_GROUP" "$HOME_DIR"
chown -R "$CHROOT_USER:$CHROOT_GROUP" "$INSTALL_DIR"
cat > /etc/systemd/system/torus.service << EOF
[Unit]
Description=Torus ASCII Art Server
After=network.target

[Service]
Type=forking
User=$CHROOT_USER
Group=$CHROOT_GROUP
ExecStart=$INSTALL_DIR/server -d $DATA_PATH -p $PID_PATH -s $SOCK_PATH
Restart=always
RestartSec=10
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target
EOF

if ! grep -q "Match User $CHROOT_USER" /etc/ssh/sshd_config; then
    cat >> /etc/ssh/sshd_config << EOF

Match User $CHROOT_USER
	PasswordAuthentication yes
	PermitEmptyPasswords yes
	ForceCommand $INSTALL_DIR/client -s $SOCK_PATH
	DisableForwarding yes
	MaxSessions 1
EOF
fi

echo "--------------------------------"
echo "passwd -d $CHROOT_USER"
echo "systemctl restart sshd"
echo "systemctl enable --now torus"
echo "systemctl status torus"