import type { SidebarSession } from "@/components/sidebar-session-row";
import type { ChartLibraryRecord, ChatSession } from "@/lib/home-types";
import { sessionChartLabel } from "@/lib/home-profile";
import { shanghaiDateTimeLabel } from "@/lib/session-shanghai-clock";

export function sessionSidebarTitle(session: ChatSession) {
  return session.title?.trim() || "新对话";
}

export function sessionSidebarSubtitle(
  session: ChatSession,
  library: readonly ChartLibraryRecord[] = [],
): string {
  const clock = Number.isFinite(session.updatedAt) ? shanghaiDateTimeLabel(new Date(session.updatedAt)) : "";
  const parts: string[] = [];
  if (clock) parts.push(clock);
  if (session.chartProfileRole && session.chartProfileRole !== "self" && session.chartProfileId) {
    parts.push(sessionChartLabel(session, library));
  }
  return parts.join(" · ");
}

export function toSidebarSessionRow(
  session: ChatSession,
  library: readonly ChartLibraryRecord[] = [],
): SidebarSession {
  return {
    id: session.id,
    title: sessionSidebarTitle(session),
    subtitle: sessionSidebarSubtitle(session, library) || null,
    pinned: session.pinned,
    updatedAt: session.updatedAt,
  };
}