# Nginx configuration for Bridge DApp Frontend (Admin Panel)
# Note: This is DIFFERENT from mim4u.org (which uses VMID 7810)
# Deploy to: /etc/nginx/sites-available/bridge-dapp
# Symlink to: /etc/nginx/sites-enabled/bridge-dapp

server {
    listen 80;
    listen [::]:80;
    server_name cross-all.defi-oracle.io;

    root /var/www/html/bridge-dapp;
    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;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/json application/javascript;

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

    # SPA routing - serve index.html for all routes
    location / {
        try_files $uri $uri/ /index.html;
        
        # Security headers from _headers file
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://cdn.ethers.io https://cdn.jsdelivr.net https://unpkg.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: https:; connect-src 'self' https: http://192.168.11.250:8545 ws://192.168.11.250:8546 wss:; frame-ancestors 'self';" always;
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    }

    # API proxy (if needed)
    location /api/ {
        proxy_pass http://192.168.11.250:8545;
        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;
    }

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

    # Error pages
    error_page 404 /index.html;
    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root /usr/share/nginx/html;
    }

    # Logging
    access_log /var/log/nginx/frontend-dapp-access.log;
    error_log /var/log/nginx/frontend-dapp-error.log;
}
