# load_module snippets for installed modules
include /etc/nginx/modules-enabled/*.conf;
# a very silly syntax rendering bug needs this */

daemon off;

user app;
worker_processes auto;
worker_cpu_affinity auto;
pid /run/nginx.pid;

env YT_POT_BGUTIL_BASE_URL;

events {
    worker_connections 1024;
}

http {

    # Basic settings
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 300;
    types_hash_max_size 2048;
    server_tokens off;
    server_names_hash_bucket_size 64;
    server_name_in_redirect off;
    client_body_in_file_only clean;
    client_body_buffer_size 32K;
    client_max_body_size 100M;
    send_timeout 300s;
    large_client_header_buffers 4 8k;

    # Mime type handling
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Default security headers
    add_header X-Frame-Options SAMEORIGIN;
    add_header X-Content-Type-Options nosniff;
    add_header X-XSS-Protection "1; mode=block";

    # Logging
    log_format host '$remote_addr - $remote_user [$time_local] "[$host] $request" $status $bytes_sent "$http_referer" "$http_user_agent" "$gzip_ratio"';
    access_log /dev/stdout;
    error_log stderr;

    # GZIP
    gzip on;
    gzip_disable "msie6";
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    # Caching proxy requests
    proxy_cache_lock on;
    proxy_cache_use_stale updating;
    # temporary files in shared memory
    proxy_temp_path /dev/shm/nginx-tmp 1;
    # change this to /config/cache/nginx for a persistent cache
    proxy_cache_path /dev/shm/nginx-cache levels=1:2:2 keys_zone=gunicorn:4m inactive=48h max_size=256m min_free=16m;

    # X-Forwarded-Host (pass-through, or set)
    map $http_x_forwarded_host $x_forwarded_host {
        default $http_x_forwarded_host;
        ""      $http_host;
    }

    # X-Forwarded-Proto (pass-through, or set)
    map $http_x_forwarded_proto $x_forwarded_proto {
        default $http_x_forwarded_proto;
        ""      $scheme;
    }

    # Set the default port based on X-Forwarded-Proto
    map $x_forwarded_proto $default_http_port {
        default 80;
        "https" 443;
    }
 
    # Extract the remote port from the HTTP Host header.
    # Uses default_http_port from above,
    #     when no port was found in the header.
    map $http_host $x_remote_port {
        default                 $default_http_port;
        "~^[^\:]+:(?<p>\d+)$"   $p;
    }

    # X-Forwarded-Port (pass-through, or set)
    map $http_x_forwarded_port $x_forwarded_port {
        default $http_x_forwarded_port;
        ""      $x_remote_port;
    }

    # Site
    server {

        # Ports
        listen 4848;
        listen [::]:4848;

        # Web root
        root /docs;
        index index.html;

        # Proxy
        proxy_buffers 32 4k;
        proxy_set_header Connection "";

        # Server domain name
        server_name _;

        # Authentication and proxying
        location / {
            proxy_pass http://127.0.0.1:8080;
            proxy_set_header Host localhost:$proxy_port;
            proxy_set_header X-Forwarded-Host $x_forwarded_host;
            proxy_set_header X-Forwarded-Port $x_forwarded_port;
            proxy_set_header X-Forwarded-Proto $x_forwarded_proto;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_redirect off;

            # this read timeout should be lower than gunicorn's timeout
            proxy_read_timeout 89s;
            proxy_connect_timeout 10s;

            # cache long running web requests
            proxy_cache gunicorn;
            proxy_cache_lock_timeout 88s;
        }

        # File dwnload and streaming
        location /media-data/ {
            internal;
            alias /downloads/;
        }
    }

    # Proof-of-Origin Token Server
    include /etc/nginx/token_server.conf;

}