events {
    worker_connections 1024;
}

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

    # Logging
    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;

    # Performance
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 10M;

    # Gzip compression
    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 servers
    upstream ydn_app {
        server ydn-app:8080;
    }

    upstream dolibarr {
        server ydn-dolibarr:80;
    }

    # Security headers
    add_header X-Frame-Options DENY always;
    add_header X-Content-Type-Options nosniff always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: https:; font-src 'self' data:; connect-src 'self' https://api.stripe.com https://js.stripe.com; frame-src https://js.stripe.com https://hooks.stripe.com;" always;

    server {
        listen 80;
        server_name localhost;

        # Redirect HTTP to HTTPS in production
        # return 301 https://$server_name$request_uri;

        # Security
        server_tokens off;

        # Main application
        location / {
            proxy_pass http://ydn_app;
            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;
            
            # Timeouts
            proxy_connect_timeout 30s;
            proxy_send_timeout 30s;
            proxy_read_timeout 30s;
        }

        # API with rate limiting
        location /api/ {
            limit_req zone=api burst=20 nodelay;
            
            proxy_pass http://ydn_app;
            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;
        }

        # Login endpoint with stricter rate limiting
        location /api/v1/login {
            limit_req zone=login burst=5 nodelay;
            
            proxy_pass http://ydn_app;
            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;
        }

        # Static files
        location /static/ {
            alias /usr/share/nginx/html/static/;
            expires 1y;
            add_header Cache-Control "public, immutable";
            add_header X-Content-Type-Options nosniff;
        }

        # Stripe webhooks
        location /api/v1/webhooks/stripe {
            proxy_pass http://ydn_app;
            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;
            
            # Allow larger payloads for webhooks
            client_max_body_size 1M;
        }

        # Dolibarr
        location /dolibarr/ {
            proxy_pass http://dolibarr/;
            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;
            
            # PHP specific settings
            proxy_buffers 8 16k;
            proxy_buffer_size 32k;
        }

        # Health check
        location /health {
            proxy_pass http://ydn_app;
            access_log off;
        }

        # Deny access to sensitive files
        location ~ /\. {
            deny all;
        }

        location ~ \.(conf|log|sql|env)$ {
            deny all;
        }
    }
}