#!/bin/sh
# Re-render every diagram in diagrams/*.mmd to a committed SVG beside it, then
# rebuild index.html so the viewer carries the new pictures.
#
# mermaid-cli drives a real browser through puppeteer. It downloads its own
# chrome-headless-shell by default, which fails behind a proxy and wastes
# 150 MB; PUPPETEER_EXECUTABLE_PATH points it at the system chromium instead.
# --no-sandbox is required because that chromium is not the one puppeteer
# provisioned and has no sandbox helper of its own here.
#
#   sh docs/architecture/render.sh
#
# Run it from anywhere. A parse error in one file leaves the others alone and
# prints FAIL with the mermaid error, which is the only way this repo has to
# syntax-check a .mmd.
set -eu

here=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
dia="$here/diagrams"
cfg=$(mktemp)
trap 'rm -f "$cfg"' EXIT
printf '{"args":["--no-sandbox","--disable-gpu"]}' > "$cfg"

: "${PUPPETEER_EXECUTABLE_PATH:=$(command -v chromium || command -v chromium-browser || command -v google-chrome-stable || true)}"
if [ -z "$PUPPETEER_EXECUTABLE_PATH" ]; then
  echo "render.sh: no chromium found. Install one, or set PUPPETEER_EXECUTABLE_PATH." >&2
  exit 1
fi
export PUPPETEER_EXECUTABLE_PATH

for f in "$dia"/*.mmd; do
  n=$(basename "$f" .mmd)
  err=$(mktemp)
  if npx --yes @mermaid-js/mermaid-cli@11 -p "$cfg" -t dark -b '#0e1116' \
        -i "$f" -o "$dia/$n.svg" >/dev/null 2>"$err" && [ -s "$dia/$n.svg" ]; then
    echo "OK   $n"
  else
    echo "FAIL $n"
    grep -m1 -A3 'Parse error' "$err" || tail -3 "$err"
  fi
  rm -f "$err"
done

python3 "$here/build_viewer.py"

# The only check the viewer has. A TypeError in a renderer shows as a blank
# panel, not as an error, so run every view against a DOM stub before shipping.
if command -v node >/dev/null 2>&1; then
  node "$here/check_viewer.js" || exit 1
else
  echo "SKIP check_viewer.js: no node"
fi