# SSL Configuration (use this after obtaining certificates)
# Rename to default.conf after SSL setup

server {
    listen 80;
    server_name ${DOMAIN};
    
    # Certbot challenge
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    
    # Redirect all HTTP to HTTPS
    location / {
        return 301 https://$server_name$request_uri;
    }
}

server {
    listen 443 ssl http2;
    server_name ${DOMAIN};

    # SSL certificates (mounted from certbot)
    ssl_certificate /etc/letsencrypt/live/${DOMAIN}/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/${DOMAIN}/privkey.pem;
    
    # SSL configuration
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;
    ssl_session_tickets off;

    # HSTS (enable after confirming HTTPS works)
    # add_header Strict-Transport-Security "max-age=63072000" always;

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

    # Proxy all requests to the Next.js app
    location / {
        proxy_pass http://app:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        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_cache_bypass $http_upgrade;
        proxy_read_timeout 86400;
    }

    # Static files caching
    location /_next/static {
        proxy_pass http://app:3000;
        proxy_cache_valid 200 365d;
        add_header Cache-Control "public, immutable";
    }

    # API rate limiting
    location /api/ {
        limit_req zone=api burst=20 nodelay;
        limit_conn addr 10;
        
        proxy_pass http://app:3000;
        proxy_http_version 1.1;
        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;
    }

    # Auth endpoints - stricter rate limiting
    location /api/auth/ {
        limit_req zone=auth burst=5 nodelay;
        limit_conn addr 5;
        
        proxy_pass http://app:3000;
        proxy_http_version 1.1;
        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;
    }
}