# Main Nginx configuration
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 4096;
    use epoll;
    multi_accept on;
}

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

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

    access_log /var/log/nginx/access.log main;

    # Basic settings
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    server_tokens off;

    # Buffer sizes
    client_body_buffer_size 128k;
    client_max_body_size 10m;
    client_header_buffer_size 1k;
    large_client_header_buffers 4 4k;

    # Timeouts
    client_body_timeout 12;
    client_header_timeout 12;
    send_timeout 10;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied expired no-cache no-store private auth;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/x-javascript
        application/xml+rss
        application/json
        application/javascript
        application/xml
        image/svg+xml;

    # Rate limiting zones
    limit_req_zone $binary_remote_addr zone=api:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=payment:10m rate=5r/s;
    limit_req_zone $binary_remote_addr zone=login:10m rate=1r/s;

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