#!/usr/bin/env bash
# Sync the built static site to the live root in an order that avoids deploy-race
# blank screens AND post-deploy slow loads. rsync isn't atomic, so a naïve
# `rsync --delete` can briefly serve a NEW index.html that points at chunks not
# synced yet (→ failed load), or delete old chunks an in-flight client still
# needs. And even once synced, a new shell can point at chunks that aren't warm
# at the CDN edge yet, so the unlucky first visitor fetches them cold from the
# (residential) origin — the post-deploy slow-load window. So the order is:
#   1. new hashed chunks first, and DON'T prune old ones (grace window)
#   2. WARM those chunks at the edge BEFORE the shell goes live, so a new shell
#      never references cold chunks
#   3. other static assets (version.json, icons…), pruning removed files
#   4. the shell HTML — only once its chunks exist AND are warm
#   5. the service worker last — a returning client adopts it only after the rest
#   6. warm the shell + key routes after publish
# Old immutable chunks are pruned after a grace window to bound disk growth.
# NOTE: warming runs from this host, so it primes the Cloudflare POP nearest the
# origin (great for local/nearby users + our own post-deploy testing); a distant
# POP still cold-fills once on its first hit — inherent to a residential origin.
set -euo pipefail
src="$1"; site="$2"
base="https://upbeatbytes.com"

# Warm a newline-separated list of paths (on stdin) through the public domain.
# Best-effort: a warm miss must never fail the deploy.
warm() { xargs -P 8 -I{} curl -fsS -o /dev/null --max-time 20 "$base{}" 2>/dev/null || true; }

# 1. New hashed chunks first (old ones kept — 14-day grace for in-flight clients).
rsync -a "$src/_app/immutable/" "$site/_app/immutable/"

# 2. Warm the chunks BEFORE publishing the shell, so the new shell never points
#    at chunks still cold at the edge (the post-deploy slow-load cause).
echo "  warming new chunks (before publish)…"
find "$site/_app/immutable" -type f \( -name '*.js' -o -name '*.css' \) -printf '/_app/immutable/%P\n' | warm

# 3. Other static assets (prune removed files), then 4. the shell, then 5. the SW.
rsync -a --delete \
  --exclude='_app/immutable/***' --exclude='index.html' --exclude='service-worker.js' \
  "$src/" "$site/"
rsync -a "$src/index.html" "$site/index.html"
rsync -a "$src/service-worker.js" "$site/service-worker.js"

# 6. Warm the shell + key routes + remaining static now that they're published
#    (primes CF↔origin even where no-cache; caches the cacheable shell/routes).
echo "  warming shell + routes (after publish)…"
printf '%s\n' / /play /account /admin /service-worker.js /_app/version.json \
  /manifest.webmanifest /words-5.json /words-6.json /logo.svg /favicon.svg \
  /icon-192.png /icon-512.png /fonts/inter-latin-wght-normal.woff2 | warm

# Bound disk growth: prune immutable chunks older than the grace window.
find "$site/_app/immutable" -type f -mtime +14 -delete 2>/dev/null || true
