#!/usr/bin/env bash
# ============================================================================
# prerender-static.sh — build aac.transaction.science as a self-contained
# static site.
#
# AAC ships as a static CSR-hydrate SPA, but it's a Leptos SSR app: the
# index.html the browser loads is the SSR server's *rendered* output (it carries
# the hydration island markers and the pre-rendered board). A plain
# `cargo leptos build` never emits that index.html, and it doesn't copy the
# PWA assets that live in `static/` (only the `public/` assets-dir). This script
# closes both gaps so the result in `target/site/` is everything prod needs:
#
#   build  -> target/site/{pkg/, icons/}            (cargo-leptos)
#   bundle -> target/site/{manifest.json, sw.js}    (from static/)
#   render -> target/site/index.html                (capture SSR `/`)
#
# Output: a self-contained `target/site/` ready to rsync to prod. Idempotent.
# ============================================================================
set -euo pipefail
cd "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

PORT="${AAC_PRERENDER_PORT:-39207}"
SITE="target/site"

echo "▸ cargo leptos build --release"
cargo leptos build --release

echo "▸ bundling PWA assets from static/ into $SITE"
cp crates/aac-web/static/manifest.json "$SITE/manifest.json"
cp crates/aac-web/static/sw.js          "$SITE/sw.js"

echo "▸ starting SSR server on 127.0.0.1:$PORT to prerender /"
LEPTOS_OUTPUT_NAME=aac-web \
LEPTOS_SITE_ROOT="$SITE" \
LEPTOS_SITE_PKG_DIR=pkg \
LEPTOS_SITE_ADDR="127.0.0.1:$PORT" \
LEPTOS_ENV=PROD \
  target/release/aac-web > /tmp/aac-prerender-ssr.log 2>&1 &
SRV=$!
trap 'kill "$SRV" 2>/dev/null || true' EXIT

# Wait for the listener (up to ~30s).
ready=false
for _ in $(seq 1 120); do
  if curl -sf "http://127.0.0.1:$PORT/" -o /dev/null 2>/dev/null; then ready=true; break; fi
  sleep 0.25
done
if ! $ready; then
  echo "✗ SSR server did not come up; log:" >&2; tail -5 /tmp/aac-prerender-ssr.log >&2; exit 1
fi

echo "▸ capturing rendered / -> $SITE/index.html"
curl -sf "http://127.0.0.1:$PORT/" -o "$SITE/index.html"

kill "$SRV" 2>/dev/null || true
trap - EXIT

# Sanity-check the capture is the hydrating SSR shell, not an error page.
test -s "$SITE/index.html"
grep -q 'mod.hydrate' "$SITE/index.html" || { echo "✗ captured index.html is not the hydrating shell" >&2; exit 1; }
grep -q '<title>AAC' "$SITE/index.html" || { echo "✗ captured index.html missing expected title" >&2; exit 1; }

echo "✓ self-contained dist ready at $SITE/"
ls -1 "$SITE"