# ──────────────────────────────────────────────
# Nūr — Muslim Companion · Nginx SPA Config
# Target: moslem02.falahos.my (Cloudflare proxied)
# ──────────────────────────────────────────────

upstream backend_prayer {
    # Placeholder for future API upstream (e.g. aladhan.com proxy)
    keepalive 32;
}

server {
    listen 80;
    listen [::]:80;
    server_name moslem02.falahos.my;

    # ── Cloudflare real-ip ─────────────────────
    # Cloudflare sends visitor IP via CF-Connecting-IP header.
    # Uncomment and populate with current CF IP ranges:
    # https://www.cloudflare.com/ips-v4  /  ips-v6
    # real_ip_header CF-Connecting-IP;
    # real_ip_recursive on;
    # set_real_ip_from 173.245.48.0/20;
    # set_real_ip_from 103.21.244.0/22;
    # … (keep current by syncing from cloudflare.com/ips-v4)

    # ── Static root ────────────────────────────
    root /var/www/nur-muslim-companion;
    index index.html;
    error_page 404 =200 /index.html;

    # ── Gzip ───────────────────────────────────
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 5;
    gzip_min_length 512;
    gzip_types
        text/html
        text/plain
        text/css
        text/javascript
        application/javascript
        application/json
        application/manifest+json
        image/svg+xml
        image/x-icon
        font/woff2;

    # ── Security headers ───────────────────────
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "0" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    # HSTS — only enable once TLS is confirmed working via Cloudflare
    # add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;

    # ── SPA fallback ───────────────────────────
    # All routes serve index.html; actual 404s are impossible.
    # index.html is NOT cached so updates reach clients immediately.
    location / {
        try_files $uri $uri/ /index.html;

        # index.html: no-cache (must always fetch fresh version)
        add_header Cache-Control "no-cache, must-revalidate" always;
    }

    # ── Hashed static assets (immutable) ───────
    # Vite emits content-hashed filenames: assets/index-abc123.js
    # These can be cached forever on CDN and browsers alike.
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable, max-age=31536000" always;
        access_log off;
    }

    # ── Favicon ────────────────────────────────
    location = /favicon.svg {
        expires 7d;
        add_header Cache-Control "public, max-age=604800" always;
        access_log off;
    }

    # ── PWA manifest ───────────────────────────
    location = /manifest.webmanifest {
        expires 1d;
        add_header Cache-Control "public, max-age=86400" always;
        add_header Content-Type "application/manifest+json";
    }

    # ── Service Worker ─────────────────────────
    # Service-worker script must NOT be cached and must be served
    # from its own scope (root). Cloudflare bypasses cache for sw.js.
    location /sw.js {
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Service-Worker-Allowed "/";
        expires off;
        access_log off;
    }

    # ── PWA app shell (workbox precached) ──────
    # workbox-*.js, worker-*.js are versioned hashed files:
    location ~* \.(js|css|woff2)$ {
        expires 1y;
        add_header Cache-Control "public, immutable, max-age=31536000" always;
    }

    # ── Icon files ─────────────────────────────
    location ~* \.(png|ico)$ {
        expires 1y;
        add_header Cache-Control "public, immutable, max-age=31536000" always;
        access_log off;
    }

    # ── Deny hidden files ──────────────────────
    location ~ /\. {
        deny all;
        access_log off;
        log_not_found off;
    }

    # ── Deny node_modules & src ────────────────
    location ~ ^/(node_modules|src)/ {
        deny all;
        access_log off;
    }
}