#!/bin/sh

# To run from Internet: 
#     sudo sh -c "$(curl -s http://apps.control2net.com/apt/install-conectric-gateway)"
# Doc: https://github.com/Conectric/node-gateway

echo "Check Node.js"
nodejs=$(nodejs --version 2>&1 | grep v)
if [ -z "$nodejs" ]; then
    echo "Install Node.js first. Instructions:"
    echo "    sudo su"
    echo "    curl -sL https://deb.nodesource.com/setup_10.x | bash -"
    echo "    apt-get install -y nodejs"
    exit 0
fi

DIRECTORY="/home/pi/node-gateway"
if [ ! -d "$DIRECTORY" ]; then
    echo "Install Conectric gateway from Internet..."
    cd /home/pi
    sudo -u pi git clone https://github.com/Conectric/node-gateway.git
    cd node-gateway
    sudo -u pi npm install
    echo "Update @goiot/goiot package..."
    sudo -u pi npm update @goiot/goiot
else
    echo "..."
fi

FILE="/etc/systemd/system/node-gateway.service"
if [ ! -f "$FILE" ]; then
    echo "Setup service..."
    cd /etc/systemd/system
    sudo touch node-gateway.service
    echo "[Unit]" >> node-gateway.service
    echo "Description=Node Gateway Service" >> node-gateway.service
    echo "After=rc-local.service" >> node-gateway.service
    echo "" >> node-gateway.service
    echo "[Service]" >> node-gateway.service
    echo "WorkingDirectory=/home/pi/node-gateway" >> node-gateway.service
    echo "ExecStart=/usr/bin/npm start" >> node-gateway.service
    echo "Restart=on-failure" >> node-gateway.service
    echo "" >> node-gateway.service
    echo "[Install]" >> node-gateway.service
    echo "WantedBy=multi-user.target" >> node-gateway.service
    sudo systemctl daemon-reload
fi
echo "Finished."
echo "Use these commands to control the service:"
echo "    sudo systemctl status node-gateway.service   (show service status)"
echo "    sudo systemctl start node-gateway.service    (start the service)"
echo "    sudo systemctl stop node-gateway.service     (stop the service)"
echo "    sudo systemctl restart node-gateway.service  (restart the service)"
echo "    sudo systemctl enable node-gateway.service   (service starts after reboot)"
echo "    sudo systemctl disable node-gateway.service  (service does not start after reboot)"
echo "    journalctl -f -u node-gateway.service        (show real-time log)"