import log4js from "logger";
import fs from "node:fs";
import path from "node:path";

const logger = log4js.getLogger("SCHEDULER");

const LOG_DIR = path.resolve(process.cwd(), "logs");

export default async function cleanupLogs(payload?: Record<string, unknown>) {
  const days = (payload?.days as number) ?? 30;
  const cutoff = Date.now() - days * 24 * 60 * 60 * 1000;

  let deletedCount = 0;

  try {
    if (!fs.existsSync(LOG_DIR)) {
      logger.info("Log cleanup: log dir does not exist, skipping");
      return { success: true, message: "Log dir not found", deleted: 0 };
    }

    const files = fs.readdirSync(LOG_DIR);
    for (const file of files) {
      if (!file.endsWith(".log") && !file.endsWith(".log.gz")) continue;

      const filePath = path.join(LOG_DIR, file);
      try {
        const stat = fs.statSync(filePath);
        if (stat.mtimeMs < cutoff) {
          fs.unlinkSync(filePath);
          deletedCount++;
        }
      } catch {
        // 单个文件删除失败不中断整体清理
      }
    }

    logger.info("Log cleanup: removed %d files older than %d days", deletedCount, days);
    return { success: true, message: `Cleaned ${deletedCount} log files older than ${days} days`, deleted: deletedCount };
  } catch (err) {
    logger.error("Log cleanup failed: %s", err instanceof Error ? err.message : String(err));
    return { success: false, message: "Log cleanup failed", deleted: 0 };
  }
}