map $http_upgrade $piik_connection_upgrade {
    default upgrade;
    '' close;
}

limit_req_zone $binary_remote_addr zone=piik_site_access:10m rate=5r/m;

server {
    listen 80;
    listen [::]:80;
    server_name share.example.com;

    location ^~ /.well-known/acme-challenge/ {
        root /var/www/letsencrypt;
        default_type text/plain;
    }

    location / {
        return 301 https://share.example.com$request_uri;
    }
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name share.example.com;

    ssl_certificate /etc/letsencrypt/live/share.example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/share.example.com/privkey.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    access_log /var/log/nginx/piik.access.log;
    error_log /var/log/nginx/piik.error.log warn;

    add_header Strict-Transport-Security "max-age=31536000" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer" always;
    add_header X-Frame-Options "DENY" always;
    add_header Permissions-Policy "camera=(self), microphone=(self), geolocation=()" always;

    # Media uses /signal. Reject credential-bearing RTC query endpoints without
    # persisting their query strings, including requests from already-open pages.
    location ~ ^/rtc(?:/|$) {
        access_log off;
        error_log /dev/null crit;
        return 404;
    }

    location = /api/site-access {
        limit_req zone=piik_site_access burst=5 nodelay;
        limit_req_status 429;
        proxy_pass http://127.0.0.1:8787;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Proto https;
        proxy_buffering off;
    }

    location / {
        proxy_pass http://127.0.0.1:8787;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $piik_connection_upgrade;
        proxy_read_timeout 5h;
        proxy_send_timeout 5h;
        proxy_buffering off;
    }
}