events {
    worker_connections 1024;
}

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

    # Configuración de logs
    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;
    error_log /var/log/nginx/error.log warn;

    # Configuración básica
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    # Compresión
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    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/atom+xml
        image/svg+xml;

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

    # Upstream para OpenVidu Meet
    upstream openvidu-backend {
        server openvidu-meet:6080;
        keepalive 32;
    }

    # Servidor principal - Solo HTTP puerto 80
    # EasyPanel/Traefik maneja SSL y subdominios
    server {
        listen 80;
        server_name _;
        
        # Headers para proxy (EasyPanel/Traefik)
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host $host;

        # Timeouts
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
        proxy_buffering off;

        # WebSocket support
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # API endpoints con rate limiting
        location /api/ {
            limit_req zone=api burst=20 nodelay;
            proxy_pass http://openvidu-backend;
        }

        # Login endpoint con rate limiting estricto
        location /api/auth/login {
            limit_req zone=login burst=5 nodelay;
            proxy_pass http://openvidu-backend;
        }

        # WebSocket para LiveKit
        location /ws {
            proxy_pass http://openvidu-backend;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_cache_bypass $http_upgrade;
        }

        # Archivos estáticos con cache
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            proxy_pass http://openvidu-backend;
            expires 1y;
            add_header Cache-Control "public, immutable";
        }

        # Todas las demás rutas
        location / {
            proxy_pass http://openvidu-backend;
        }

        # Health check para EasyPanel
        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # Security headers básicos
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;

        # Ocultar versión de nginx
        server_tokens off;
    }
}