import grabDBDir from "../utils/grab-db-dir";
import fs from "fs";
import grabSortedBackups from "./grab-sorted-backups";
import { AppData } from "../data/app-data";
import path from "path";
import _ from "lodash";
export default function trimBackups({ config }) {
    const { backup_dir } = grabDBDir({ config });
    // Only consider files written by `backup` (`{db_name}-{timestamp}.sql`)
    const backupNamePattern = new RegExp(`^${_.escapeRegExp(config.db_name)}-\\d+\\.sql$`);
    const backups = grabSortedBackups({ config }).filter((name) => backupNamePattern.test(name) &&
        fs.statSync(path.join(backup_dir, name)).isFile());
    const max_backups = config.max_backups || AppData["MaxBackups"];
    for (let i = 0; i < backups.length; i++) {
        const backup_name = backups[i];
        if (!backup_name)
            continue;
        if (i > max_backups - 1) {
            const backup_file_to_unlink = path.join(backup_dir, backup_name);
            fs.unlinkSync(backup_file_to_unlink);
        }
    }
}