user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
  worker_connections 1024;
  use epoll;
  multi_accept on;
}

http {
  include /etc/nginx/mime.types;
  default_type application/octet-stream;

  # Logging
  log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                  '$status $body_bytes_sent "$http_referer" '
                  '"$http_user_agent" "$http_x_forwarded_for"';
  access_log /var/log/nginx/access.log main;

  # Performance
  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 65;
  gzip on;
  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_types text/plain text/css text/xml application/json application/javascript
             application/rss+xml application/atom+xml image/svg+xml;

  # Security headers
  add_header X-Frame-Options "SAMEORIGIN" always;
  add_header X-Content-Type-Options "nosniff" always;
  add_header X-XSS-Protection "1; mode=block" always;
  add_header Referrer-Policy "strict-origin-when-cross-origin" always;
  add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;

  # Redirect HTTP → HTTPS
  server {
    listen 80;
    server_name biztaghavi.com www.biztaghavi.com;

    location /.well-known/acme-challenge/ {
      root /var/www/certbot;
    }

    location / {
      return 301 https://$host$request_uri;
    }
  }

  # Main HTTPS server
  server {
    listen 443 ssl http2;
    server_name biztaghavi.com www.biztaghavi.com;

    ssl_certificate /etc/letsencrypt/live/biztaghavi.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/biztaghavi.com/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;

    # Redirect www → non-www
    if ($host = www.biztaghavi.com) {
      return 301 https://biztaghavi.com$request_uri;
    }

    # Static assets — immutable cache
    location /_next/static/ {
      proxy_pass http://next-app:3000;
      proxy_cache_valid 200 365d;
      add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # Next.js image optimization
    location /_next/image {
      proxy_pass http://next-app:3000;
      proxy_cache_valid 200 7d;
      add_header Cache-Control "public, max-age=604800";
    }

    # Main proxy
    location / {
      proxy_pass http://next-app:3000;
      proxy_http_version 1.1;
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection 'upgrade';
      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;
      proxy_cache_bypass $http_upgrade;
      proxy_read_timeout 60s;
    }
  }
}