upstream harbor_backend {
    # server harbor-nginx:8080; # Harbor is in its own network
    server 10.0.0.250:3200; 

    # Keep up to 32 idle connections per worker
    keepalive 16;

    # Maximum time a connection can be idle
    keepalive_timeout 60s;

    # Maximum requests per keepalive connection
    keepalive_requests 100;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name harbor.novicelab.io;

    # SSL
    ssl_certificate /etc/letsencrypt/live/novicelab.io/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/novicelab.io/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/novicelab.io/chain.pem;

    # Security Headers
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" 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;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Content-Security-Policy "default-src 'self' https: data: 'unsafe-inline' 'unsafe-eval';" always;
    add_header Permissions-Policy        "interest-cohort=()" always;

    # Logging
    access_log /var/log/nginx/harbor.novicelab.io_access.log json_combined;
    error_log /var/log/nginx/harbor.novicelab.io_error.log debug;

    # set $harbor_backend 10.0.0.251:3200; 
    # set $harbor_backend harbor-nginx:8080; 

    client_max_body_size 0;

    # Disable absolute redirects which often cause 301 loops
    absolute_redirect off;

    # Docker registry specific headers
    chunked_transfer_encoding on;

    location / {
        proxy_pass http://harbor_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-Scheme $scheme;
        proxy_set_header X-Forwarded-Proto  $scheme; #https;
        proxy_set_header X-Forwarded-Host   $http_host;
        proxy_set_header X-Forwarded-Port   $server_port;

        # WebSocket support for real-time updates
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        client_max_body_size 0;

        # Timeouts
        proxy_connect_timeout 300;
        proxy_send_timeout 300;
        proxy_read_timeout 300;
        send_timeout 300;

        proxy_set_header Authorization $http_authorization;
        proxy_pass_header Authorization;

        # Performance optimizations
        proxy_request_buffering off;

        proxy_buffering off;
        proxy_set_header Referer $http_referer;
        proxy_redirect off;

        proxy_set_header Cookie $http_cookie;


        # Optional: Increase buffers for large tokens/cookies
        proxy_busy_buffers_size   512k;
        proxy_buffers   4 512k;
        proxy_buffer_size   256k;
    }

    location /v2/ {
        # Do not allow Nginx to add/remove trailing slashes here
        proxy_pass http://harbor_backend;
        
        proxy_set_header Host $http_host; # Important for Registry
        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_set_header X-Forwarded-Host  $host;
        proxy_set_header X-Forwarded-Port  $server_port;
        
        # Increase body size for image uploads
        client_max_body_size 0; 
    }
}