# Osprey nginx site — installed to /etc/nginx/sites-available/osprey

# Rate limiting for login endpoint (SEC-L9): 5 requests/min per IP, burst 10.
limit_req_zone $binary_remote_addr zone=login:10m rate=5r/m;

# HTTP -> HTTPS redirect
server {
    listen 80;
    server_name _;
    return 301 https://$host$request_uri;
}

# HTTPS server
server {
    listen 443 ssl http2;
    server_name _;
    server_tokens off;

    ssl_certificate     /etc/osprey/certs/osprey.crt;
    ssl_certificate_key /etc/osprey/certs/osprey.key;
    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:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305;
    ssl_prefer_server_ciphers on;

    # Security headers
    add_header X-Content-Type-Options nosniff always;
    add_header X-Frame-Options DENY always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" 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' wss:; font-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'" always;

    # Gzip compression — reduces transfer size for text-based assets.
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_min_length 256;
    gzip_comp_level 4;
    gzip_types text/plain text/css application/javascript application/json text/xml application/xml image/svg+xml;

    client_max_body_size 20m;

    root /usr/share/osprey/web;
    index index.html;

    # Login rate limiting (SEC-L9).
    location = /api/v1/auth/login {
        limit_req zone=login burst=10 nodelay;
        limit_req_status 429;
        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;
    }

    # Database restore — streaming upload, no size limit.
    location = /api/v1/admin/restore/database {
        client_max_body_size 0;
        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_request_buffering off;
        proxy_read_timeout 3600s;
    }

    # API proxy — forward to local osprey-api service.
    location /api/ {
        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;

        # WebSocket support.
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_read_timeout 86400s;
    }

    # Hashed assets — cache forever (Vite puts content hash in filename).
    # Repeat security headers since add_header in a location block replaces parent headers.
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        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 Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self' wss:; font-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'" always;
    }

    # index.html — never cache (ensures new builds are picked up immediately).
    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        add_header Expires "0";
        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 Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self' wss:; font-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'" always;
    }

    # SPA fallback — serve index.html for all routes.
    location / {
        try_files $uri $uri/ /index.html;
    }
}
