// Pure helpers that look up role metadata from a list of roles.
// Taking the role list as a parameter (instead of reading a Vue ref)
// keeps these dependency-free and unit-testable.

import type { Role } from "../../config/roles";

// Material Icon names use lowercase letters and underscores only.
// Custom roles may have stored an emoji or other freeform value in
// the icon field; fall back to a generic icon in that case so we
// don't render the literal text inside a Material Icons span.
const MATERIAL_ICON_RE = /^[a-z_]+$/;

// `smart_toy` (robot glyph) is used for both fallback cases —
// "role not found" and "role icon isn't a valid Material Icon name".
// Reserved specifically to avoid collision with `star`, which is the
// PinToggle glyph for collection shortcuts; using `star` here would
// make an unknown role look identical to a pinned collection (#1684).
const FALLBACK_ICON = "smart_toy";

export function roleIcon(roles: Role[], roleId: string): string {
  const icon = roles.find((role) => role.id === roleId)?.icon ?? FALLBACK_ICON;
  return MATERIAL_ICON_RE.test(icon) ? icon : FALLBACK_ICON;
}

export function roleName(roles: Role[], roleId: string): string {
  return roles.find((role) => role.id === roleId)?.name ?? roleId;
}