export function resolveWorkspaceOrder(definitions, savedOrder) {
  const defaults = Array.from(definitions || []);
  const byId = new Map(defaults.map((definition) => [definition.id, definition]));
  const resolved = [];
  const seen = new Set();

  if (Array.isArray(savedOrder)) {
    savedOrder.forEach((workspaceId) => {
      if (seen.has(workspaceId) || !byId.has(workspaceId)) return;
      seen.add(workspaceId);
      resolved.push(byId.get(workspaceId));
    });
  }

  defaults.forEach((definition) => {
    if (seen.has(definition.id)) return;
    seen.add(definition.id);
    resolved.push(definition);
  });
  return resolved;
}

export function moveWorkspaceOrder(workspaceIds, index, offset) {
  if (!Array.isArray(workspaceIds) || !Number.isInteger(index) || !Number.isInteger(offset)) {
    return null;
  }
  const target = index + offset;
  if (index < 0 || index >= workspaceIds.length || target < 0 || target >= workspaceIds.length) {
    return null;
  }
  const moved = [...workspaceIds];
  [moved[index], moved[target]] = [moved[target], moved[index]];
  return moved;
}