#!/bin/sh
# Embed web/ into .gen/web_assets.inc as C byte arrays (the same trick the
# Makefile uses for src/models_builtin.json). POSIX sh on purpose: the musl
# and busybox build environments have no bash.  Usage:
#   sh scripts/embed_web.sh [out.inc] [web-dir]
set -eu
ROOT="$(cd "$(dirname "$0")/.." && pwd)"
OUT="${1:-$ROOT/.gen/web_assets.inc}"
DIR="${2:-$ROOT/web}"

FILES="index.html app.js style.css favicon.svg"

mkdir -p "$(dirname "$OUT")"
{
  echo "/* Generated by scripts/embed_web.sh from web/ - do not edit. */"
  for f in $FILES; do
    [ -f "$DIR/$f" ] || continue
    var="wui_asset_$(echo "$f" | tr -c 'a-zA-Z0-9' '_')"
    echo "static const unsigned char ${var}[] = {"
    od -An -v -tx1 "$DIR/$f" | sed 's/\([0-9a-f][0-9a-f]\)/0x\1,/g'
    echo "0x00};"
  done
  echo "static const wui_asset_t wui_assets[] = {"
  for f in $FILES; do
    [ -f "$DIR/$f" ] || continue
    var="wui_asset_$(echo "$f" | tr -c 'a-zA-Z0-9' '_')"
    case "$f" in
      *.html) ctype="text/html; charset=utf-8" ;;
      *.js)   ctype="text/javascript; charset=utf-8" ;;
      *.css)  ctype="text/css; charset=utf-8" ;;
      *.svg)  ctype="image/svg+xml" ;;
      *)      ctype="application/octet-stream" ;;
    esac
    echo "  {\"$f\", \"$ctype\", ${var}, sizeof(${var}) - 1},"
  done
  echo "};"
  echo "static const int wui_asset_count = (int)(sizeof(wui_assets) / sizeof(wui_assets[0]));"
} > "$OUT.tmp"
mv "$OUT.tmp" "$OUT"
echo "embedded $(wc -c < "$OUT") bytes of C into $OUT"