# HTTP-only Konfiguration (SSL/HTTPS noch nicht eingerichtet)
# Sobald ein TLS-Zertifikat vorhanden ist:
#   1. Listen-Block auf 443 ssl http2 erweitern
#   2. ssl_certificate / ssl_certificate_key einkommentieren
#   3. HSTS-Header hinzufügen
#   4. HTTP->HTTPS-Redirect aktivieren

server {
    listen 80;
    server_name _;

    client_max_body_size 20M;

    # API Backend
    location /api/ {
        proxy_pass         http://127.0.0.1:8000;
        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;
        proxy_read_timeout 60s;

        # Security Headers
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';" always;
    }

    # FastAPI Docs (nur in dev aktiv)
    location /docs {
        proxy_pass http://127.0.0.1:8000/docs;

        # Security Headers
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';" always;
    }

    location /openapi.json {
        proxy_pass http://127.0.0.1:8000/openapi.json;

        # Security Headers
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';" always;
    }

    # React Frontend (statische Dateien)
    # HINWEIS: nginx-Regel: add_header in einem location-Block ueberschreibt
    # alle add_header-Direktiven des parent server-Blocks. Daher Security-Header
    # in jede location wiederholen.
    location / {
        root   /opt/timemaster/frontend/dist;
        index  index.html;
        try_files $uri $uri/ /index.html;
        expires 1d;

        add_header Cache-Control "public, must-revalidate";
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';" always;
    }

    # Uploads / Static Files
    location /static/ {
        alias /opt/timemaster/backend/static/;
        expires 7d;

        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "DENY" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;
        add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none';" always;
    }
}