import { exec } from "child_process";
import { promisify } from "util";

const execAsync = promisify(exec);

async function checkBinary(binary) {
  try {
    const { stdout } = await execAsync(`which ${binary}`);
    const location = stdout.trim();
    return { name: binary, ok: Boolean(location), location: location || null };
  } catch (err) {
    return { name: binary, ok: false, error: err.message };
  }
}

export async function buildHealthReport({ ffmpegPath = "ffmpeg", ffprobePath = "ffprobe", tmdbKey, tvdbKey, fanartKey }) {
  const binaries = await Promise.all([
    checkBinary(ffmpegPath),
    checkBinary(ffprobePath)
  ]);

  return {
    binaries,
    apis: {
      tmdb: { configured: Boolean(tmdbKey) },
      tvdb: { configured: Boolean(tvdbKey) },
      fanart: { configured: Boolean(fanartKey) }
    },
    timestamp: new Date().toISOString()
  };
}

export function healthRouter(getReport) {
  return (req, res) => {
    const report = typeof getReport === "function" ? getReport() : null;
    res.json(report || { status: "unknown" });
  };
}