reset-deps.zsh

reset-deps() {
  echo "🔎 Detecting package manager..."

  pkg_manager=""

  # Step 1: Detect from package.json
  if [ -f package.json ]; then
    pkg_manager=$(jq -r '.packageManager // empty' package.json 2>/dev/null | cut -d@ -f1)
    if [ -n "$pkg_manager" ]; then
      echo "📦 Detected package manager from package.json → $pkg_manager"
    fi
  fi

  # Step 2: Fallback to lockfile detection
  if [ -z "$pkg_manager" ]; then
    if [ -f pnpm-lock.yaml ] || [ -f pnpm-workspace.yaml ]; then
      pkg_manager="pnpm"
      echo "📦 Detected package manager from lockfile → pnpm"
    elif [ -f yarn.lock ]; then
      pkg_manager="yarn"
      echo "📦 Detected package manager from lockfile → yarn"
    elif [ -f package-lock.json ]; then
      pkg_manager="npm"
      echo "📦 Detected package manager from lockfile → npm"
    else
      pkg_manager="npm"
      echo "⚠️ No lockfile or packageManager detected. Defaulting to npm."
    fi
  fi

  # Step 3: Collect node_modules dirs
  echo "🔍 Scanning for node_modules directories..."
  node_modules_dirs=()
  while IFS= read -r dir; do
    node_modules_dirs+=("$dir")
  done < <(find . -type d -name node_modules -prune)

  # Step 4: Collect lockfiles
  lockfiles_to_delete=()
  for file in pnpm-lock.yaml yarn.lock package-lock.json; do
    if [ -f "$file" ]; then
      lockfiles_to_delete+=("$file")
    fi
  done

  # Step 5: Preview actual deletions
  echo ""
  if [ "${#node_modules_dirs[@]}" -gt 0 ]; then
    echo "📁 The following node_modules directories will be deleted:"
    for dir in "${node_modules_dirs[@]}"; do echo "  - $dir"; done
  else
    echo "📁 No node_modules directories found."
  fi

  echo ""
  if [ "${#lockfiles_to_delete[@]}" -gt 0 ]; then
    echo "🧾 The following lockfiles will be deleted:"
    for file in "${lockfiles_to_delete[@]}"; do echo "  - $file"; done
  else
    echo "🧾 No lockfiles found."
  fi

  echo ""
  echo "⚠️  This operation will permanently delete the above directories and files."
  echo "Are you sure you want to continue? [y/N] "
  read confirm
  case "$confirm" in
    [yY][eE][sS]|[yY])
      echo "✅ Proceeding with dependency reset..."
      ;;
    *)
      echo "❌ Aborted by user."
      return 0
      ;;
  esac

  # Step 6: Delete node_modules
  if [ "${#node_modules_dirs[@]}" -gt 0 ]; then
    echo "🗑️  Deleting node_modules directories..."
    printf '%s\n' "${node_modules_dirs[@]}" | xargs rm -rf
    echo "✅ node_modules directories deleted."
  fi

  # Step 7: Delete lockfiles
  if [ "${#lockfiles_to_delete[@]}" -gt 0 ]; then
    echo "🗑️  Deleting lockfiles..."
    rm -f "${lockfiles_to_delete[@]}"
    echo "✅ Lockfiles deleted."
  fi

  # Step 8: Reinstall dependencies
  echo "🚀 Installing dependencies with $pkg_manager..."
  case "$pkg_manager" in
    pnpm)
      if pnpm install; then echo "✅ pnpm install succeeded."; else echo "❌ pnpm install failed."; return 1; fi
      ;;
    yarn)
      if yarn install; then echo "✅ yarn install succeeded."; else echo "❌ yarn install failed."; return 1; fi
      ;;
    npm)
      if npm install; then echo "✅ npm install succeeded."; else echo "❌ npm install failed."; return 1; fi
      ;;
    *)
      echo "❌ Unknown package manager '$pkg_manager'. Aborting."
      return 1
      ;;
  esac

  echo "🎉 Dependency tree has been fully reset and reinstalled."
}