export const RUN_ENTRY_TYPE = "ultrapi-run";

/** Just enough of Pi's theme to colour a line, without depending on the TUI package. */
export type Paint = (color: string, text: string) => string;

const PLAIN: Paint = (_color, text) => text;

function text(value: unknown): string | undefined {
  return typeof value === "string" && value.trim() ? value : undefined;
}

/**
 * One line for a dispatch that has already been appended to the session.
 *
 * These entries have been recorded at every dispatch since the beginning and rendered as nothing at
 * all, because no renderer was registered for the type. The transcript therefore showed a tool call
 * and then a silence where the run began.
 */
export function runEntryLine(data: unknown, paint: Paint = PLAIN): string | undefined {
  if (!data || typeof data !== "object") return undefined;
  const entry = data as Record<string, unknown>;
  const runId = text(entry.runId);
  if (!runId) return undefined;
  const status = text(entry.status);
  const colour = status === "blocked" ? "error" : status === "direct" ? "accent" : "success";
  const recovered = text(entry.recoveredFromRunId);
  const parts = [
    paint("muted", "UltraPi"),
    paint(colour, `${text(entry.topology) ?? "run"}${status ? `/${status}` : ""}`),
    paint("muted", runId.slice(0, 8)),
    ...(recovered ? [paint("muted", `recovered from ${recovered.slice(0, 8)}`)] : []),
    ...(text(entry.piAgentsRunId) ? [paint("muted", "delegated")] : []),
  ];
  return parts.join(" · ");
}