#!/usr/bin/env bash
set -Eeuo pipefail

APP_ROOT="/opt/cloudpure-web"
SOURCE_DIR="$APP_ROOT/source"
RELEASES_DIR="$APP_ROOT/releases"
CURRENT_LINK="/opt/web/dist"
LOCK_FILE="$APP_ROOT/build.lock"
REASON="${1:-manual}"
export CHROME_PATH="${CHROME_PATH:-/snap/bin/chromium}"

mkdir -p "$RELEASES_DIR"
exec 9>"$LOCK_FILE"
if ! flock -n 9; then
  echo "build already running; skip reason=$REASON"
  exit 0
fi

BUILD_ID="$(date +%Y%m%d%H%M%S)"
BUILD_DIR="$RELEASES_DIR/$BUILD_ID"
LOG_FILE="$APP_ROOT/build-$BUILD_ID.log"

{
  echo "build started: id=$BUILD_ID reason=$REASON"
  cd "$SOURCE_DIR"
  npm ci --no-audit --no-fund
  npm run build
  test -f dist/sitemap.xml
  test -f dist/news/index.html
  mv dist "$BUILD_DIR"
  ln -sfn "$BUILD_DIR" "$CURRENT_LINK"
  nginx -t
  systemctl reload nginx
  find "$RELEASES_DIR" -mindepth 1 -maxdepth 1 -type d -printf '%T@ %p\n' \
    | sort -nr | tail -n +4 | cut -d' ' -f2- | xargs -r rm -rf
  echo "build completed: id=$BUILD_ID"
} 2>&1 | tee "$LOG_FILE"