# Production Nginx Configuration for FibDash
# Single backend server serving both API and static files

upstream fibdash_backend {
    server 127.0.0.1:5000;
    keepalive 32;
}

server {
    listen 80;
    server_name fibdash.local fibdash.growheads.de your-domain.com;
    
    # Security headers
    add_header X-Frame-Options DENY;
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";
    add_header Referrer-Policy "strict-origin-when-cross-origin";
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' https://accounts.google.com https://apis.google.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https://accounts.google.com;";
    
    # Enable gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;
    
    # Static assets with long-term caching
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        proxy_pass http://fibdash_backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # Cache static assets for 1 year
        expires 1y;
        add_header Cache-Control "public, immutable";
        
        # Optional: serve from nginx cache
        proxy_cache_valid 200 1y;
        proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
    }
    
    # API routes
    location /api/ {
        proxy_pass http://fibdash_backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # API responses shouldn't be cached
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        add_header Expires "0";
        
        # Increase proxy timeouts for API calls
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }
    
    # Health check
    location /health {
        access_log off;
        proxy_pass http://fibdash_backend;
        proxy_set_header Host $host;
    }
    
    # All other requests (React app)
    location / {
        proxy_pass http://fibdash_backend;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # Cache HTML for a short time
        expires 1h;
        add_header Cache-Control "public, must-revalidate";
    }
    
    # Error pages
    error_page 404 /404.html;
    error_page 500 502 503 504 /50x.html;
    
    # Logging
    access_log /var/log/nginx/fibdash_prod_access.log;
    error_log /var/log/nginx/fibdash_prod_error.log warn;
}

# Optional: HTTPS redirect
# server {
#     listen 80;
#     server_name your-domain.com;
#     return 301 https://$server_name$request_uri;
# }

# Optional: HTTPS configuration
# server {
#     listen 443 ssl http2;
#     server_name your-domain.com;
#     
#     ssl_certificate /path/to/your/certificate.crt;
#     ssl_certificate_key /path/to/your/private.key;
#     ssl_protocols TLSv1.2 TLSv1.3;
#     ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384;
#     ssl_prefer_server_ciphers off;
#     
#     # ... rest of configuration same as above
# }