import { execSync, type ExecSyncOptions } from "child_process";
import path from "path";
import s3UploadFile from "../utils/s3-upload";

const BACKUP_NAME = `.backup`;
const BACKUP_DIR = `/root/backups`;
const BACKUP_FILE_NAME = "backup.tar.xz";
const BACKUP_DIR_BACKUP = path.join(BACKUP_DIR, BACKUP_NAME);
const DOCKER_VOLUMES_DIR = "/var/lib/docker/volumes";
const DOCKER_VOLUMES_BACKUP_DIR = path.join(
    BACKUP_DIR_BACKUP,
    `docker`,
    `volumes`,
);
const BACKUP_FILE_TAR = path.join(BACKUP_DIR, BACKUP_FILE_NAME);
const RSYNC_IGNORE_FILE = `/root/.coderank/server/rsync-ignore.txt`;
const R2_FOLDER = `archives/servers`;
const R2_FILE_NAME = `${process.env.CODERANK_HOST_DOMAIN}.tar.xz`;

const execOpts: ExecSyncOptions = {
    stdio: ["inherit", "inherit", "ignore"],
};

execSync(`rm -rf ${path.join(BACKUP_DIR, BACKUP_FILE_NAME)}`, execOpts);
execSync(`mkdir -p ${DOCKER_VOLUMES_BACKUP_DIR}`, execOpts);

let syncDockerVolsCmd = `rsync -avz --delete --exclude-from="${RSYNC_IGNORE_FILE}"`;
syncDockerVolsCmd += ` ${DOCKER_VOLUMES_DIR}/ ${DOCKER_VOLUMES_BACKUP_DIR}/`;

execSync(syncDockerVolsCmd, execOpts);

execSync(`tar -czvf ${BACKUP_FILE_TAR} ${BACKUP_NAME}`, {
    ...execOpts,
    cwd: BACKUP_DIR,
});

await s3UploadFile({
    fileName: R2_FILE_NAME,
    filePath: BACKUP_FILE_TAR,
    folder: R2_FOLDER,
});