# ia.enso.4nkweb.com — reverse proxy to LAN host (Ollama + AnythingLLM).
#
# Prerequisites on the proxy host:
# - TLS certificate for ia.enso.4nkweb.com (e.g. certbot).
# - In the main nginx `http { }` block, include the Bearer map (see http-maps/ia-enso-ollama-bearer.map.conf.example).
#
# Upstream backend: replaced at deploy time (default 192.168.1.164). Manual install: replace __IA_ENSO_BACKEND_IP__.

upstream ia_enso_ollama {
    server __IA_ENSO_BACKEND_IP__:11434;
    keepalive 8;
}

upstream ia_enso_anythingllm {
    server __IA_ENSO_BACKEND_IP__:3001;
    keepalive 8;
}

server {
    listen 80;
    server_name ia.enso.4nkweb.com;

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

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

server {
    listen 443 ssl http2;
    server_name ia.enso.4nkweb.com;

    ssl_certificate     /etc/letsencrypt/live/ia.enso.4nkweb.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/ia.enso.4nkweb.com/privkey.pem;

    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

    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;

    client_max_body_size 100M;

    # Ollama OpenAI-compatible API: require Authorization: Bearer <shared secret> (see map file).
    location /ollama/ {
        if ($ia_enso_ollama_authorized = 0) {
            return 401;
        }

        proxy_pass http://ia_enso_ollama/;
        proxy_http_version 1.1;
        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_set_header Connection "";

        # Ollama does not need the client Bearer; avoids passing the gate secret downstream.
        proxy_set_header Authorization "";

        proxy_buffering off;
        proxy_read_timeout 3600s;
        proxy_send_timeout 3600s;
    }

    # AnythingLLM UI + API (application login). Subpath stripped when forwarding.
    location /anythingllm/ {
        proxy_pass http://ia_enso_anythingllm/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $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_set_header X-Forwarded-Prefix /anythingllm;
        proxy_read_timeout 3600s;
        proxy_send_timeout 3600s;
    }

    location = /anythingllm {
        return 301 https://$host/anythingllm/;
    }
}