# HTTP server block - redirect to HTTPS
server {
    listen 80;
    server_name vhtv-stiftung.de www.vhtv-stiftung.de;

    # Redirect all HTTP traffic to HTTPS
    return 301 https://$server_name$request_uri;
}

# HTTPS server block
server {
    listen 443 ssl http2;
    server_name vhtv-stiftung.de www.vhtv-stiftung.de;

    # SSL Certificate Configuration
    ssl_certificate /etc/letsencrypt/live/vhtv-stiftung.de/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/vhtv-stiftung.de/privkey.pem;

    # SSL Security Settings
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

    # HSTS (HTTP Strict Transport Security)
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

    # Enhanced Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;
    add_header Content-Security-Policy "default-src 'self' https: data: blob: 'unsafe-inline'" always;

    # Static files
    location /static/ {
        alias /opt/stiftung/app/static/;
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    location /media/ {
        alias /opt/stiftung/app/media/;
        expires 1y;
        add_header Cache-Control "public";
    }

    # Django application
    location / {
        proxy_pass http://127.0.0.1:8081;
        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 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;

        # Buffer settings
        proxy_buffering on;
        proxy_buffer_size 128k;
        proxy_buffers 4 256k;
        proxy_busy_buffers_size 256k;
    }

    # Paperless-ngx document management
    location /paperless/ {
        proxy_pass http://127.0.0.1:8080/;
        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_set_header X-Script-Name /paperless;

        # Large file uploads for documents
        client_max_body_size 100M;
        proxy_read_timeout 300s;
        proxy_connect_timeout 300s;
        proxy_send_timeout 300s;
    }

    # GrampsWeb Ahnenforschung
    # GrampsWeb SPA has <base href="/"> hardcoded — sub_filter rewrites it
    # so asset URLs resolve under /ahnenforschung/ instead of /
    location /ahnenforschung/ {
        proxy_pass http://127.0.0.1:8090/;
        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_set_header X-Script-Name /ahnenforschung;

        # Rewrite <base href="/"> to <base href="/ahnenforschung/">
        # so the SPA loads JS/CSS from the correct subpath
        proxy_set_header Accept-Encoding "";
        sub_filter '<base href="/">' '<base href="/ahnenforschung/">';
        sub_filter_once on;
        sub_filter_types text/html;

        # WebSocket support
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        proxy_read_timeout 300s;
        proxy_connect_timeout 60s;
        proxy_send_timeout 300s;
    }

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

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

    location ~ ^/(\.env|docker-compose|Dockerfile) {
        deny all;
    }
}