#!/usr/bin/env bash
# Build a single-file Mermaid + ELK layout bundle (IIFE setting window.mermaid with the ELK layout loaders
# registered) for scripts/build_atlas_html.py and scripts/render_check.py.
# Usage: build_mermaid_bundle.sh [elk-output.js] [dagre-output.js]
# The optional second bundle omits the ELK plugin and is suitable for fallback
# renderer comparison in render_check.py.
set -euo pipefail
OUT="$(realpath -m "${1:-mermaid-elk.bundle.js}")"
DAGRE_OUT=""
if [[ -n "${2:-}" ]]; then
  DAGRE_OUT="$(realpath -m "$2")"
fi
WORK="$(mktemp -d)"
cd "$WORK"
npm init -y >/dev/null
npm install --silent mermaid @mermaid-js/layout-elk esbuild
cat > entry.js <<'EOF'
import mermaid from 'mermaid';
import elkLayouts from '@mermaid-js/layout-elk';
mermaid.registerLayoutLoaders(elkLayouts);
window.mermaid = mermaid;
EOF
node node_modules/esbuild/install.js >/dev/null 2>&1 || true   # some npm configs block postinstall; fetch the binary explicitly
./node_modules/.bin/esbuild entry.js --bundle --format=iife --minify --outfile="$OUT"
echo "mermaid $(node -p "require('mermaid/package.json').version") + layout-elk $(node -p "require('@mermaid-js/layout-elk/package.json').version") -> $OUT"
if [[ -n "$DAGRE_OUT" ]]; then
cat > entry-dagre.js <<'EOF'
import mermaid from 'mermaid';
window.mermaid = mermaid;
EOF
./node_modules/.bin/esbuild entry-dagre.js --bundle --format=iife --minify --outfile="$DAGRE_OUT"
echo "mermaid $(node -p "require('mermaid/package.json').version") dagre fallback -> $DAGRE_OUT"
fi