import { readdirSync, statSync, unlinkSync, truncateSync } from "fs";
import { resolve } from "path";

const LOG_DIR = resolve(import.meta.dirname || new URL(".", import.meta.url).pathname, "..", "logs");
const MAX_AGE_DAYS = 7;
const MAX_SIZE_BYTES = 10 * 1024 * 1024; // 10MB

function cleanup() {
  console.log(`[cleanup-logs] Scanning ${LOG_DIR}...`);
  let files;
  try {
    files = readdirSync(LOG_DIR);
  } catch {
    console.log("[cleanup-logs] Log directory not found, skipping.");
    return;
  }

  const now = Date.now();
  const maxAge = MAX_AGE_DAYS * 24 * 60 * 60 * 1000;
  let deleted = 0;
  let truncated = 0;

  for (const file of files) {
    if (!file.endsWith(".log")) continue;
    const filePath = resolve(LOG_DIR, file);
    try {
      const stat = statSync(filePath);
      const age = now - stat.mtimeMs;

      if (age > maxAge && file !== "cron.log") {
        unlinkSync(filePath);
        deleted++;
        console.log(`  🗑️  Deleted ${file} (age: ${(age / 86400000).toFixed(1)}d)`);
      } else if (stat.size > MAX_SIZE_BYTES) {
        truncateSync(filePath, MAX_SIZE_BYTES / 2);
        truncated++;
        console.log(`  ✂️  Truncated ${file} (${(stat.size / 1024 / 1024).toFixed(1)}MB → ${(MAX_SIZE_BYTES / 2 / 1024 / 1024).toFixed(1)}MB)`);
      }
    } catch (e) {
      console.warn(`  ⚠️  Error processing ${file}: ${e.message}`);
    }
  }

  console.log(`[cleanup-logs] Done. Deleted: ${deleted}, Truncated: ${truncated}`);
}

cleanup();