export type PlatformRecommendRuntimeRequestKind =
  | 'none'
  | 'background'
  | 'runtime-guest';

export type PlatformPuzzleRuntimeAuthMode = 'default' | 'isolated';

export type PlatformRecommendRuntimeAuthPlan = {
  requestKind: PlatformRecommendRuntimeRequestKind;
  puzzleRuntimeAuthMode: PlatformPuzzleRuntimeAuthMode;
};

export type PlatformRecommendRuntimeAuthInput = {
  embedded?: boolean;
  allowRuntimeGuestAuth?: boolean;
  authUserId?: string | null;
  hasStoredAccessToken?: boolean;
};

function hasAccountAuth(input: {
  authUserId?: string | null;
  hasStoredAccessToken?: boolean;
}) {
  return Boolean(input.authUserId?.trim() || input.hasStoredAccessToken);
}

export function shouldUsePlatformRecommendRuntimeGuestAuth(
  input: Pick<
    PlatformRecommendRuntimeAuthInput,
    'allowRuntimeGuestAuth' | 'authUserId' | 'hasStoredAccessToken'
  >,
) {
  return Boolean(input.allowRuntimeGuestAuth) && !hasAccountAuth(input);
}

export function resolvePlatformRecommendRuntimeAuthPlan(
  input: PlatformRecommendRuntimeAuthInput,
): PlatformRecommendRuntimeAuthPlan {
  const embedded = Boolean(input.embedded);
  const allowRuntimeGuestAuth = input.allowRuntimeGuestAuth ?? embedded;
  const useRuntimeGuestAuth = shouldUsePlatformRecommendRuntimeGuestAuth({
    allowRuntimeGuestAuth,
    authUserId: input.authUserId,
    hasStoredAccessToken: input.hasStoredAccessToken,
  });

  if (useRuntimeGuestAuth) {
    return {
      requestKind: 'runtime-guest',
      puzzleRuntimeAuthMode: 'isolated',
    };
  }

  return {
    requestKind: embedded ? 'background' : 'none',
    puzzleRuntimeAuthMode: 'default',
  };
}