// Which fixture world the mock network serves. One scenario = one route, so every branch of the
// data layer opens in isolation and gets its own screenshot and its own accessibility pass
// (FRONTEND_PLAN.md rule 10).
//
// The list lives here rather than in `mock/` because the router needs it too, and the router may
// not see fixtures. It disappears together with the mock, and nothing outside the mock reads the
// VALUE of a scenario — only its name, as a route.

export const scenarios = [
  'showcase',
  'scale',
  'empty',
  'intake',
  'loading',
  'error',
  'offline',
  'partial',
] as const;

export type Scenario = (typeof scenarios)[number];

export const defaultScenario: Scenario = 'showcase';

/** The scenario is read from the path at start-up, before the router exists. */
export function scenarioOf(pathname: string): Scenario {
  const name = pathname.replace(/^\/+|\/+$/g, '');
  return (scenarios as readonly string[]).includes(name) ? (name as Scenario) : defaultScenario;
}