# Design System Server (DSS) - Nginx Configuration
# Version: 0.8.0
#
# Installation:
#   sudo cp infra/nginx/dss.conf /etc/nginx/sites-available/
#   sudo ln -s /etc/nginx/sites-available/dss.conf /etc/nginx/sites-enabled/
#   sudo nginx -t
#   sudo systemctl reload nginx

# Upstream backend
upstream dss_backend {
    server 127.0.0.1:3456;
    keepalive 32;
}

# HTTP server (redirects to HTTPS after SSL setup)
server {
    listen 80;
    listen [::]:80;
    server_name your-domain.com;  # CHANGE THIS

    # ACME challenge for Let's Encrypt
    location /.well-known/acme-challenge/ {
        root /var/www/html;
    }

    # Redirect to HTTPS (uncomment after SSL setup)
    # location / {
    #     return 301 https://$server_name$request_uri;
    # }

    # Proxy to DSS (comment out after SSL setup)
    location / {
        proxy_pass http://dss_backend;
        proxy_http_version 1.1;

        # Headers
        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;

        # WebSocket/SSE support
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # Timeouts
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;

        # Buffering
        proxy_buffering off;
        proxy_request_buffering off;
    }

    # Health check endpoint (no auth, no logging)
    location /health {
        proxy_pass http://dss_backend/health;
        access_log off;
    }
}

# HTTPS server (uncomment after running certbot)
# server {
#     listen 443 ssl http2;
#     listen [::]:443 ssl http2;
#     server_name your-domain.com;  # CHANGE THIS
#
#     # SSL certificates (managed by certbot)
#     ssl_certificate /etc/letsencrypt/live/your-domain.com/fullchain.pem;
#     ssl_certificate_key /etc/letsencrypt/live/your-domain.com/privkey.pem;
#
#     # SSL configuration
#     ssl_protocols TLSv1.2 TLSv1.3;
#     ssl_ciphers HIGH:!aNULL:!MD5;
#     ssl_prefer_server_ciphers on;
#     ssl_session_cache shared:SSL:10m;
#     ssl_session_timeout 10m;
#
#     # Security headers
#     add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
#     add_header X-Frame-Options "SAMEORIGIN" always;
#     add_header X-Content-Type-Options "nosniff" always;
#     add_header X-XSS-Protection "1; mode=block" always;
#
#     # Logging
#     access_log /var/log/nginx/dss-access.log;
#     error_log /var/log/nginx/dss-error.log;
#
#     # Max upload size
#     client_max_body_size 10M;
#
#     # Proxy to DSS backend
#     location / {
#         proxy_pass http://dss_backend;
#         proxy_http_version 1.1;
#
#         # Headers
#         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;
#
#         # WebSocket/SSE support
#         proxy_set_header Upgrade $http_upgrade;
#         proxy_set_header Connection "upgrade";
#
#         # Timeouts
#         proxy_connect_timeout 60s;
#         proxy_send_timeout 60s;
#         proxy_read_timeout 60s;
#
#         # Buffering
#         proxy_buffering off;
#         proxy_request_buffering off;
#     }
#
#     # Health check endpoint
#     location /health {
#         proxy_pass http://dss_backend/health;
#         access_log off;
#     }
#
#     # Static files caching
#     location /admin-ui {
#         proxy_pass http://dss_backend/admin-ui;
#         expires 7d;
#         add_header Cache-Control "public, immutable";
#     }
# }