user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    keepalive_timeout 65;
    keepalive_requests 100000;

    variables_hash_max_size 2048;
    server_names_hash_bucket_size 128;
    server_tokens off;

    resolver 8.8.8.8 valid=30s ipv6=off;
    resolver_timeout 11s;

    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                        '$status $body_bytes_sent "$http_referer" '
                        '"$http_user_agent" "$http_x_forwarded_for"';

    # JSON format — preferred for log aggregators (ELK, Loki, Datadog, etc.)
    log_format  json_log escape=json
        '{'
            '"time":"$time_iso8601",'
            '"remote_addr":"$remote_addr",'
            '"method":"$request_method",'
            '"uri":"$request_uri",'
            '"status":$status,'
            '"bytes_sent":$body_bytes_sent,'
            '"request_time":$request_time,'
            '"upstream_response_time":"$upstream_response_time",'
            '"referer":"$http_referer",'
            '"user_agent":"$http_user_agent",'
            '"x_forwarded_for":"$http_x_forwarded_for",'
            '"host":"$host"'
        '}';


    access_log  /var/log/nginx/access.log json_log;
    error_log   /var/log/nginx/error.log;
    
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    types_hash_max_size 2048;

    # Important for MinIO
    client_max_body_size 0;
    proxy_buffering off;
    proxy_request_buffering off;

    # Increase the buffer for the request line and headers
    client_header_buffer_size 16k;
    large_client_header_buffers 4 32k;

    # If using Nginx as a proxy to the Harbor core/registry
    proxy_buffer_size 16k;
    proxy_buffers 4 32k;
    proxy_busy_buffers_size 64k;

    proxy_connect_timeout 300;
    proxy_send_timeout 300;
    proxy_read_timeout 300;

    # Add extra headers
    add_header X-Frame-Options DENY;
    add_header Content-Security-Policy "frame-ancestors 'none'";

    # SSL Settings
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;


    # Gzip Settings
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml text/javascript application/json application/javascript application/xml+rss application/rss+xml font/truetype font/opentype application/vnd.ms-fontobject image/svg+xml;


    # Include all server configurations
    include /etc/nginx/conf.d/*.conf;
}

# Existing http {} block stays as-is...

# TCP stream proxy for SMTP ports
# stream {

#     upstream mailserver_smtp {
#         server mailserver:25;   # docker-mailserver container name
#     }

#     upstream mailserver_submission {
#         server mailserver:587;
#     }

#     # Port 25 — inbound MTA-to-MTA (if you ever receive external mail)
#     server {
#         listen 25;
#         proxy_pass mailserver_smtp;
#         proxy_timeout 1m;
#         proxy_connect_timeout 10s;
#     }

#     # Port 587 — STARTTLS submission (for mail clients or apps)
#     server {
#         listen 587;
#         proxy_pass mailserver_submission;
#         proxy_timeout 1m;
#         proxy_connect_timeout 10s;
#     }
# }