import type { SubagentRunRecord } from "../../agents/subagent-registry.js";
import { truncateUtf16Safe } from "../../utils.js";

export function formatDurationShort(valueMs?: number) {
  if (!valueMs || !Number.isFinite(valueMs) || valueMs <= 0) {
    return "n/a";
  }
  const totalSeconds = Math.round(valueMs / 1000);
  const hours = Math.floor(totalSeconds / 3600);
  const minutes = Math.floor((totalSeconds % 3600) / 60);
  const seconds = totalSeconds % 60;
  if (hours > 0) {
    return `${hours}h${minutes}m`;
  }
  if (minutes > 0) {
    return `${minutes}m${seconds}s`;
  }
  return `${seconds}s`;
}

export function formatAgeShort(valueMs?: number) {
  if (!valueMs || !Number.isFinite(valueMs) || valueMs <= 0) {
    return "n/a";
  }
  const minutes = Math.round(valueMs / 60_000);
  if (minutes < 1) {
    return "just now";
  }
  if (minutes < 60) {
    return `${minutes}m ago`;
  }
  const hours = Math.round(minutes / 60);
  if (hours < 48) {
    return `${hours}h ago`;
  }
  const days = Math.round(hours / 24);
  return `${days}d ago`;
}

export function resolveSubagentLabel(entry: SubagentRunRecord, fallback = "subagent") {
  const raw = entry.label?.trim() || entry.task?.trim() || "";
  return raw || fallback;
}

export function formatRunLabel(entry: SubagentRunRecord, options?: { maxLength?: number }) {
  const raw = resolveSubagentLabel(entry);
  const maxLength = options?.maxLength ?? 72;
  if (!Number.isFinite(maxLength) || maxLength <= 0) {
    return raw;
  }
  return raw.length > maxLength ? `${truncateUtf16Safe(raw, maxLength).trimEnd()}…` : raw;
}

export function formatRunStatus(entry: SubagentRunRecord) {
  if (!entry.endedAt) {
    return "running";
  }
  const status = entry.outcome?.status ?? "done";
  return status === "ok" ? "done" : status;
}

export function sortSubagentRuns(runs: SubagentRunRecord[]) {
  return [...runs].toSorted((a, b) => {
    const aTime = a.startedAt ?? a.createdAt ?? 0;
    const bTime = b.startedAt ?? b.createdAt ?? 0;
    return bTime - aTime;
  });
}