#!/bin/bash
#
# Veridian Edge Agent Installer
# For Raspberry Pi / Ubuntu
#

set -e

INSTALL_DIR="/opt/veridian-edge"
SERVICE_NAME="veridian-edge"
CURRENT_USER="${SUDO_USER:-$USER}"

echo "🌱 Veridian Edge Agent Installer"
echo "================================"
echo ""

# Check if running as root
if [ "$EUID" -ne 0 ]; then
    echo "⚠️  Please run with sudo: sudo ./install.sh"
    exit 1
fi

# Check for Bun
if ! command -v bun &> /dev/null; then
    echo "📦 Installing Bun..."
    curl -fsSL https://bun.sh/install | bash
    export BUN_INSTALL="/home/$CURRENT_USER/.bun"
    export PATH="$BUN_INSTALL/bin:$PATH"
fi

echo "✅ Bun installed: $(bun --version)"

# Create install directory
echo "📁 Creating $INSTALL_DIR..."
mkdir -p "$INSTALL_DIR"
chown "$CURRENT_USER:$CURRENT_USER" "$INSTALL_DIR"

# Copy files (assume running from repo root)
echo "📋 Copying files..."
if [ -f "package.json" ]; then
    cp -r ./* "$INSTALL_DIR/"
else
    echo "❌ Error: Run this script from the veridian-edge repository root"
    exit 1
fi

# Install dependencies
echo "📦 Installing dependencies..."
cd "$INSTALL_DIR"
sudo -u "$CURRENT_USER" bun install

# Create config if not exists
if [ ! -f "$INSTALL_DIR/config.json" ]; then
    echo "📝 Creating config.json from template..."
    cp "$INSTALL_DIR/config.example.json" "$INSTALL_DIR/config.json"
    echo ""
    echo "⚠️  IMPORTANT: Edit $INSTALL_DIR/config.json with your credentials!"
    echo ""
fi

# Create data directory
mkdir -p "/home/$CURRENT_USER/.local/share/veridian-edge"
chown "$CURRENT_USER:$CURRENT_USER" "/home/$CURRENT_USER/.local/share/veridian-edge"

# Create systemd service
echo "🔧 Creating systemd service..."
BUN_PATH="/home/$CURRENT_USER/.bun/bin/bun"
cat > "/etc/systemd/system/$SERVICE_NAME.service" <<EOF
[Unit]
Description=Veridian SensorPush Edge Agent
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=$CURRENT_USER
WorkingDirectory=$INSTALL_DIR
ExecStart=$BUN_PATH run src/index.ts
Restart=always
RestartSec=10
WatchdogSec=120
StandardOutput=journal
StandardError=journal
Environment=HOME=/home/$CURRENT_USER

[Install]
WantedBy=multi-user.target
EOF

# Enable and start service
echo "🚀 Enabling and starting service..."
systemctl daemon-reload
systemctl enable "$SERVICE_NAME"

echo ""
echo "================================"
echo "✅ Installation complete!"
echo ""
echo "Next steps:"
echo "  1. Edit config: sudo nano $INSTALL_DIR/config.json"
echo "  2. Start service: sudo systemctl start $SERVICE_NAME"
echo "  3. Check status: sudo systemctl status $SERVICE_NAME"
echo "  4. View logs: journalctl -u $SERVICE_NAME -f"
echo ""
echo "Health check: curl http://localhost:3030/health"
echo "================================"