export type DispatchPlanUiTarget = {
  projectId: string;
  threadDisplayName: string;
};

export type DispatchPlanUiPayload = {
  planId: string;
  status?: string;
  summary?: string;
  targets?: DispatchPlanUiTarget[];
};

export function latestPendingDispatchPlan(plans: DispatchPlanUiPayload[] | null | undefined) {
  return (plans ?? []).find((plan) => plan.status === "pending_user_confirmation") ?? null;
}

export function summarizeDispatchPlan(plan: DispatchPlanUiPayload | null | undefined) {
  if (!plan) {
    return "主 Agent 暂未生成推荐线程。";
  }
  const summary = plan.summary?.trim() || "主 Agent 已生成推荐线程。";
  const titles = (plan.targets ?? [])
    .map((target) => target.threadDisplayName?.trim() || "")
    .filter(Boolean);
  if (!titles.length) {
    return summary;
  }
  return `${summary}\n推荐线程：${titles.join("、")}`;
}

export function extractApprovedTargetProjectIds(plan: DispatchPlanUiPayload | null | undefined) {
  return (plan?.targets ?? [])
    .map((target) => target.projectId?.trim() || "")
    .filter(Boolean);
}