#!/bin/bash
# First-time setup for excalidraw-png-export skill.
# Installs playwright and chromium headless into a dedicated directory.

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
EXPORT_DIR="$SCRIPT_DIR/.export-runtime"

if [ -d "$EXPORT_DIR/node_modules/playwright" ]; then
  echo "Runtime already installed at $EXPORT_DIR"
  exit 0
fi

echo "Installing excalidraw-png-export runtime..."
mkdir -p "$EXPORT_DIR"
cd "$EXPORT_DIR"

# Initialize package.json with ESM support
cat > package.json << 'PACKAGEEOF'
{
  "name": "excalidraw-export-runtime",
  "version": "1.0.0",
  "type": "module",
  "private": true
}
PACKAGEEOF

npm install playwright 2>&1
npx playwright install chromium 2>&1

# canvas provides accurate text measurement for convert.mjs.
# Requires Cairo native library: brew install pkg-config cairo pango libpng jpeg giflib librsvg
# Falls back to heuristic sizing if unavailable.
npm install canvas 2>&1 || echo "WARN: canvas install failed (missing Cairo?). Heuristic text sizing will be used."

echo "Setup complete. Runtime installed at $EXPORT_DIR"