# BetterFrame Angie/nginx config — routes admin, kiosk-api, ws, node-red.
#
# Place in /etc/angie/conf.d/betterframe.conf or /etc/nginx/conf.d/betterframe.conf
# Run on the Pi alongside the server. TLS termination here; backend services
# bind to 0.0.0.0 but firewall should restrict to localhost in production.

# Upstreams (BSB services)
upstream betterframe_admin    { server 127.0.0.1:18080; keepalive 16; }
upstream betterframe_api      { server 127.0.0.1:18081; keepalive 16; }
upstream betterframe_ws       { server 127.0.0.1:18082; }
upstream betterframe_nodered  { server 127.0.0.1:1880;  keepalive 8; }

# Rate limiting for public endpoints
limit_req_zone $binary_remote_addr zone=bf_public:10m rate=30r/s;

server {
    listen 80;
    listen [::]:80;
    server_name betterframe.local _;

    # In production: redirect to HTTPS
    # return 301 https://$host$request_uri;

    # For now: serve plain HTTP
    client_max_body_size 16M;

    # ---- Admin UI + admin API (session-authenticated) ----
    location /admin/ {
        proxy_pass http://betterframe_admin;
        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_http_version 1.1;
        proxy_set_header Connection "";
    }

    location = /admin { return 301 /admin/; }
    location /setup  { proxy_pass http://betterframe_admin; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; }
    location /auth/  { proxy_pass http://betterframe_admin; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; }
    location /static/ { proxy_pass http://betterframe_admin; }

    # ---- Kiosk REST API (Bearer kiosk-key) ----
    location /api/kiosk/ {
        proxy_pass http://betterframe_api;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
    }

    location /api/pair/ {
        # Rate-limit pairing initiate to deter brute force
        limit_req zone=bf_public burst=10 nodelay;
        proxy_pass http://betterframe_api;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    # ---- Admin API (session-authenticated) ----
    location /api/admin/ {
        proxy_pass http://betterframe_admin;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    # ---- Live kiosk WebSocket channel ----
    location /ws/kiosk {
        proxy_pass http://betterframe_ws;
        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_read_timeout 86400s; # long-lived
        proxy_send_timeout 86400s;
    }

    # ---- Node-RED dashboard (admin-only) ----
    location /nrdp/ {
        # auth_request /api/admin/_check; # enable when auth-check endpoint ready
        rewrite ^/nrdp/(.*) /$1 break;
        proxy_pass http://betterframe_nodered;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    # ---- Node-RED HTTP-in (public, rate-limited) ----
    location /in/public/ {
        limit_req zone=bf_public burst=20 nodelay;
        rewrite ^/in/public/(.*) /public/$1 break;
        proxy_pass http://betterframe_nodered;
    }

    # ---- Node-RED HTTP-in (kiosk-gated) ----
    location /in/kiosk/ {
        # Bearer kiosk-key validated by Node-RED flow
        rewrite ^/in/kiosk/(.*) /kiosk/$1 break;
        proxy_pass http://betterframe_nodered;
    }

    # ---- Health/readiness/version (public) ----
    location ~ ^/(healthz|readyz|version)$ {
        proxy_pass http://betterframe_admin;
    }

    # ---- Root redirect ----
    location = / {
        proxy_pass http://betterframe_admin;
    }
}