apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-cdn-config
  namespace: veza-production
data:
  nginx-cdn.conf: |
    # CDN-optimized nginx configuration
    # This configuration is designed to work with CDN providers
    
    server {
        listen 80;
        server_name _;
        root /usr/share/nginx/html;
        index index.html;

        # 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;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;

        # CDN-specific headers
        add_header X-CDN-Cache-Status $upstream_cache_status always;
        add_header Vary "Accept-Encoding" always;

        # Gzip compression
        gzip on;
        gzip_vary on;
        gzip_min_length 1024;
        gzip_comp_level 6;
        gzip_types 
            text/plain 
            text/css 
            text/xml 
            text/javascript 
            application/javascript 
            application/xml+rss 
            application/json 
            application/x-font-ttf 
            application/vnd.ms-fontobject 
            font/opentype 
            image/svg+xml 
            image/x-icon
            application/wasm;

        # Brotli compression (if available)
        # brotli on;
        # brotli_comp_level 6;
        # brotli_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

        # Cache static assets with long expiration for CDN
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|webp|avif|woff|woff2|ttf|eot|otf)$ {
            expires 1y;
            add_header Cache-Control "public, immutable, max-age=31536000";
            add_header X-Content-Type-Options "nosniff" always;
            access_log off;
            
            # CORS headers for CDN
            add_header Access-Control-Allow-Origin "*" always;
            add_header Access-Control-Allow-Methods "GET, HEAD, OPTIONS" always;
            add_header Access-Control-Max-Age "86400" always;
        }

        # Audio files - optimized for streaming
        location ~* \.(mp3|m4a|ogg|wav|flac|aac|opus|webm)$ {
            expires 30d;
            add_header Cache-Control "public, max-age=2592000";
            add_header Accept-Ranges bytes;
            add_header Content-Type "audio/mpeg" always;
            
            # CORS for audio files
            add_header Access-Control-Allow-Origin "*" always;
            add_header Access-Control-Allow-Methods "GET, HEAD, OPTIONS, RANGE" always;
            add_header Access-Control-Allow-Headers "Range, Content-Type" always;
            add_header Access-Control-Max-Age "86400" always;
            
            # Enable range requests for audio streaming
            if ($request_method = 'OPTIONS') {
                add_header Access-Control-Allow-Origin "*";
                add_header Access-Control-Allow-Methods "GET, HEAD, OPTIONS, RANGE";
                add_header Access-Control-Allow-Headers "Range, Content-Type";
                add_header Access-Control-Max-Age "86400";
                add_header Content-Length 0;
                return 204;
            }
        }

        # HLS streaming files
        location ~* \.(m3u8|ts)$ {
            expires 1h;
            add_header Cache-Control "public, max-age=3600";
            add_header Content-Type "application/vnd.apple.mpegurl" always;
            add_header Accept-Ranges bytes;
            
            # CORS for HLS
            add_header Access-Control-Allow-Origin "*" always;
            add_header Access-Control-Allow-Methods "GET, HEAD, OPTIONS, RANGE" always;
            add_header Access-Control-Allow-Headers "Range, Content-Type" always;
        }

        # Video files
        location ~* \.(mp4|webm|ogv|mov)$ {
            expires 7d;
            add_header Cache-Control "public, max-age=604800";
            add_header Accept-Ranges bytes;
            
            # CORS for video
            add_header Access-Control-Allow-Origin "*" always;
            add_header Access-Control-Allow-Methods "GET, HEAD, OPTIONS, RANGE" always;
        }

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

        # SPA routing - serve index.html for all routes
        location / {
            try_files $uri $uri/ /index.html;
            add_header Cache-Control "no-cache, no-store, must-revalidate";
            add_header Pragma "no-cache";
            add_header Expires "0";
        }

        # Don't cache index.html
        location = /index.html {
            add_header Cache-Control "no-cache, no-store, must-revalidate";
            add_header Pragma "no-cache";
            add_header Expires "0";
        }

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