#!/bin/bash

set -e

echo "==================================="
echo "Webshop Scraper Installation Script"
echo "==================================="
echo ""

# Check if running as root
if [ "$EUID" -ne 0 ]; then
    echo "Error: Please run as root (use sudo)"
    exit 1
fi

# Get the actual user who ran sudo
ACTUAL_USER=${SUDO_USER:-$USER}
ACTUAL_HOME=$(eval echo ~$ACTUAL_USER)

# Installation directory
INSTALL_DIR="/opt/webshop-scraper"
SERVICE_NAME="webshop-scraper"

echo "Installation directory: $INSTALL_DIR"
echo "Service name: $SERVICE_NAME"
echo ""

# Prompt for API key
echo "Please enter the API key for authentication:"
read -s API_KEY
echo ""

if [ -z "$API_KEY" ]; then
    echo "Error: API key cannot be empty"
    exit 1
fi

# Prompt for port (optional)
echo "Enter the HTTP port (default: 3000):"
read PORT
PORT=${PORT:-3000}

# Prompt for max concurrent jobs (optional)
echo "Enter the maximum number of concurrent jobs (default: 3):"
read MAX_CONCURRENT_JOBS
MAX_CONCURRENT_JOBS=${MAX_CONCURRENT_JOBS:-3}

echo ""
echo "Configuration:"
echo "  Port: $PORT"
echo "  Max Concurrent Jobs: $MAX_CONCURRENT_JOBS"
echo ""

# Create installation directory
echo "Creating installation directory..."
mkdir -p "$INSTALL_DIR"

# Get the script directory (where install.sh is located)
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(dirname "$SCRIPT_DIR")"

# Check if Node.js is installed
if ! command -v node &> /dev/null; then
    echo "Error: Node.js is not installed. Please install Node.js first."
    exit 1
fi

# Check if npm is installed
if ! command -v npm &> /dev/null; then
    echo "Error: npm is not installed. Please install npm first."
    exit 1
fi

# Build application in the source directory first
echo "Building application..."
cd "$PROJECT_DIR"

# Install all dependencies (including dev dependencies for build)
echo "Installing build dependencies..."
npm install

# Build the application
echo "Compiling TypeScript and building web assets..."
npm run build

# Check if build was successful
if [ ! -f "$PROJECT_DIR/dist/index.js" ]; then
    echo "Error: Build failed - dist/index.js not found"
    exit 1
fi

# Copy application files
echo "Copying application files..."
cp -r package.json "$INSTALL_DIR/"
cp -r dist "$INSTALL_DIR/"

# Change to installation directory
cd "$INSTALL_DIR"

# Install only production dependencies
echo "Installing production dependencies..."
npm install --production

# Create environment file
echo "Creating environment file..."
cat > "$INSTALL_DIR/.env" <<EOF
API_KEY=$API_KEY
PORT=$PORT
MAX_CONCURRENT_JOBS=$MAX_CONCURRENT_JOBS
EOF

# Set permissions
chmod 600 "$INSTALL_DIR/.env"
chown -R $ACTUAL_USER:$ACTUAL_USER "$INSTALL_DIR"

# Create systemd service file
echo "Creating systemd service..."
cat > "/etc/systemd/system/$SERVICE_NAME.service" <<EOF
[Unit]
Description=Webshop Scraper Service
After=network.target

[Service]
Type=simple
User=$ACTUAL_USER
WorkingDirectory=$INSTALL_DIR
EnvironmentFile=$INSTALL_DIR/.env
ExecStart=/usr/bin/node $INSTALL_DIR/dist/index.js
Restart=on-failure
RestartSec=10

# Logging
StandardOutput=journal
StandardError=journal
SyslogIdentifier=$SERVICE_NAME

# Security
NoNewPrivileges=true
PrivateTmp=true

[Install]
WantedBy=multi-user.target
EOF

# Reload systemd
echo "Reloading systemd..."
systemctl daemon-reload

# Enable service
echo "Enabling service..."
systemctl enable "$SERVICE_NAME"

# Start service
echo "Starting service..."
systemctl start "$SERVICE_NAME"

# Check status
echo ""
echo "==================================="
echo "Installation completed successfully!"
echo "==================================="
echo ""
echo "Service status:"
systemctl status "$SERVICE_NAME" --no-pager || true
echo ""
echo "Useful commands:"
echo "  Start service:   sudo systemctl start $SERVICE_NAME"
echo "  Stop service:    sudo systemctl stop $SERVICE_NAME"
echo "  Restart service: sudo systemctl restart $SERVICE_NAME"
echo "  View logs:       sudo journalctl -u $SERVICE_NAME -f"
echo "  Check status:    sudo systemctl status $SERVICE_NAME"
echo ""
echo "API is available at: http://localhost:$PORT"
echo "Health check: http://localhost:$PORT/health"
echo ""