# Nginx Production конфигурация

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

# Оптимизация производительности
worker_rlimit_nofile 8192;

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

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

    # Формат логов
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    
    log_format detailed '$remote_addr - $remote_user [$time_local] '
                       '"$request" $status $body_bytes_sent '
                       '"$http_referer" "$http_user_agent" '
                       'rt=$request_time uct="$upstream_connect_time" '
                       'uht="$upstream_header_time" urt="$upstream_response_time"';

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

    # Базовые настройки
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 100M;
    server_tokens off;

    # Gzip сжатие
    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;
    gzip_disable "msie6";

    # Безопасность
    # Отключаем X-Frame-Options для работы Telegram Login Widget (управляем через CSP)
    # add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;
    # CSP для Telegram Login Widget - разрешаем локальный API и Telegram iframe
    add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'; frame-src 'self' https://oauth.telegram.org https://*.telegram.org http://localhost:* http://127.0.0.1:*; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://telegram.org https://*.telegram.org; connect-src 'self' http://localhost:* http://127.0.0.1:* ws://localhost:* ws://127.0.0.1:* wss://localhost:* wss://127.0.0.1:* https://api.telegram.org https://*.telegram.org" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

    # Rate limiting
    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=100r/m;
    limit_req_zone $binary_remote_addr zone=login_limit:10m rate=5r/m;
    limit_conn_zone $binary_remote_addr zone=conn_limit:10m;

    # Кэширование
    proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=api_cache:10m 
                     max_size=1g inactive=60m use_temp_path=off;

    # Upstream серверы
    upstream backend {
        least_conn;
        server web:8000 max_fails=3 fail_timeout=30s;
        keepalive 32;
    }

    upstream frontend {
        least_conn;
        server frontend:3000 max_fails=3 fail_timeout=30s;
        keepalive 32;
    }

    # Включение конфигураций сайтов
    include /etc/nginx/conf.d/*.conf;
}