const fs = require('fs');
const path = require('path');

const TEMP_DIR = path.join(__dirname, '..', '..', 'temp');
const MAX_AGE_MS = 7 * 24 * 60 * 60 * 1000; // 7 days

/**
 * Deletes files in the temp directory that are older than 7 days.
 * Returns a summary: { deleted, errors }.
 */
function cleanupTempFiles() {
  try {
    if (!fs.existsSync(TEMP_DIR)) return { deleted: 0, errors: 0 };

    const files = fs.readdirSync(TEMP_DIR);
    const cutoff = Date.now() - MAX_AGE_MS;
    let deleted = 0;
    let errors = 0;

    for (const file of files) {
      try {
        const filePath = path.join(TEMP_DIR, file);
        const stat = fs.statSync(filePath);
        if (stat.isFile() && stat.mtimeMs < cutoff) {
          fs.unlinkSync(filePath);
          deleted++;
        }
      } catch {
        errors++;
      }
    }

    return { deleted, errors };
  } catch {
    return { deleted: 0, errors: 1 };
  }
}

module.exports = { cleanupTempFiles };