#!/usr/bin/env bash
set -Eeuo pipefail
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=common.sh
source "$SCRIPT_DIR/common.sh"
cd "$PROJECT_ROOT"

INSTALL=0
WATCH=0

usage() {
  cat <<'TXT'
Build the embedded Web UI CSS with the local Tailwind CLI.

Usage:
  ./scripts/build-web.sh
  ./scripts/build-web.sh --install   install npm dev dependencies first
  ./scripts/build-web.sh --watch     rebuild CSS while editing web files

The controller never loads Tailwind or any CSS from a CDN. web/styles.css is
committed and embedded into the Rust binary, so Node.js is not required at runtime.
TXT
}

while [[ $# -gt 0 ]]; do
  case "$1" in
    --install) INSTALL=1; shift ;;
    --watch) WATCH=1; shift ;;
    -h|--help) usage; exit 0 ;;
    *) echo "Unknown argument: $1" >&2; usage; exit 2 ;;
  esac
done

if [[ "$INSTALL" -eq 1 ]]; then
  command -v npm >/dev/null 2>&1 || fail "npm is required for --install. Install Node.js/npm first."
  say "Installing local Tailwind build dependency"
  npm install --no-audit --no-fund
fi

TAILWIND="$PROJECT_ROOT/node_modules/.bin/tailwindcss"
if [[ ! -x "$TAILWIND" ]]; then
  fail "Local Tailwind CLI is missing. Run: ./scripts/build-web.sh --install"
fi

if [[ "$WATCH" -eq 1 ]]; then
  say "Watching the Web UI with local Tailwind"
  exec "$TAILWIND" -c ./tailwind.config.js -i ./web/tailwind.input.css -o ./web/styles.css --watch
fi

say "Building the Web UI with local Tailwind"
"$TAILWIND" -c ./tailwind.config.js -i ./web/tailwind.input.css -o ./web/styles.css --minify
say "Generated web/styles.css"