import { execFile } from "node:child_process";
import { promisify } from "node:util";
const execute = promisify(execFile);
export async function probeVideoMetadata(url: string) {
  if (!/^https?:\/\//i.test(url)) throw new Error("视频链接不可用");
  const { stdout } = await execute(
    "ffprobe",
    [
      "-v",
      "error",
      "-select_streams",
      "v:0",
      "-show_entries",
      "stream=width,height,duration:format=duration",
      "-of",
      "json",
      url,
    ],
    { timeout: 20_000, maxBuffer: 1024 * 1024 },
  );
  const data = JSON.parse(stdout);
  const video = data.streams?.[0];
  const duration = Number(data.format?.duration || video?.duration);
  const width = Number(video?.width),
    height = Number(video?.height);
  if (![duration, width, height].every((value) => Number.isFinite(value) && value > 0))
    throw new Error("无法读取实际视频尺寸和时长");
  return { duration, width, height };
}