# Rate limiting zones — included inside http{} block
limit_req_zone $binary_remote_addr zone=auth_limit:10m rate=5r/m;
limit_req_zone $binary_remote_addr zone=tv_limit:10m rate=10r/m;

server {
    listen 80;
    server_tokens off;
    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;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self' ws: wss:; font-src 'self' data:;" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

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

    # Rate-limited auth endpoints (checked before the generic /api/ block)
    location ~ ^/api/(auth/(login|register)|admin/login)$ {
        limit_req zone=auth_limit burst=3 nodelay;
        limit_req_status 429;
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    # Rate-limited TV dashboard endpoint (public, token-based)
    location ~ ^/api/dashboard/ {
        limit_req zone=tv_limit burst=5 nodelay;
        limit_req_status 429;
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    # API proxy → FastAPI backend
    location /api/ {
        proxy_pass http://backend:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    # WebSocket proxy → FastAPI backend
    location /ws/ {
        limit_req zone=tv_limit burst=5 nodelay;
        limit_req_status 429;
        proxy_pass http://backend:8000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_read_timeout 3600s;
    }

    # Vue Router — all other paths serve index.html (SPA fallback)
    location / {
        try_files $uri $uri/ /index.html;
    }
}