# Nginx Configuration for Laravel with PHP-FPM
# Optimized for high concurrency (1000+ concurrent users)

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

# Events module - handles connection processing
events {
    # Maximum number of simultaneous connections per worker
    # 1024 connections per worker * auto workers = handles high concurrency
    worker_connections 1024;

    # Use epoll on Linux for better performance with high concurrency
    use epoll;

    # Allow multiple connections to be accepted by a single worker process
    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" '
                    'rt=$request_time uct="$upstream_connect_time" '
                    'uht="$upstream_header_time" urt="$upstream_response_time"';

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

    # Performance optimizations
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 50M;

    # Gzip compression
    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";

    # Buffer sizes for handling large requests
    client_body_buffer_size 128k;
    client_header_buffer_size 1k;
    large_client_header_buffers 4 16k;

    # Upstream PHP-FPM configuration
    upstream php-fpm {
        server 127.0.0.1:9000;
        # Keep connections open for better performance
        keepalive 32;
    }

    server {
        listen 80;
        server_name _;
        root /var/www/public;
        index index.php index.html index.htm;

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

        # Laravel locations
        location / {
            try_files $uri $uri/ /index.php?$query_string;
        }

        # PHP-FPM configuration
        location ~ \.php$ {
            fastcgi_pass php-fpm;
            fastcgi_index index.php;
            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
            include fastcgi_params;

            # FastCGI buffers for handling large responses
            fastcgi_buffer_size 128k;
            fastcgi_buffers 256 16k;
            fastcgi_busy_buffers_size 256k;
            fastcgi_temp_file_write_size 256k;
            fastcgi_read_timeout 300;

            # Keep connections open
            fastcgi_keep_conn on;
        }

        # Deny access to hidden files
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }

        # Deny access to sensitive files
        location ~ /\.(?!well-known).* {
            deny all;
        }

        # Static file caching
        location ~* \.(jpg|jpeg|png|gif|ico|css|js|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
            access_log off;
        }
    }
}