import { writeFileSync } from 'node:fs';
import { spawnSync } from 'node:child_process';

import { parseFetchurl } from './lib';


/* Constants */
const FLAKE = process.env.FLAKE;

const genVueText = (
    version: string,
    hash: string,
    url: string,
) => `# This file was autogenerated. DO NOT EDIT!
{
  version = "${version}";
  url = "${url}";
  hash = "${hash}";
}
`;

export const updateVuetorrent = () => {
    const FILE = `${FLAKE}/configurations/nos/modules/qbittorrent/vuetorrent.nix`;

    const OLD_VERSION = JSON.parse(spawnSync('nix',
        ['eval', '-f', FILE, '--json'],
        { shell: true }).stdout.toString()).version;

    const VERSION = JSON.parse(spawnSync('curl',
        ['-s', 'https://api.github.com/repos/VueTorrent/VueTorrent/releases/latest'],
        { shell: true }).stdout.toString()).tag_name.replace('v', '');

    const URL = `https://github.com/VueTorrent/VueTorrent/releases/download/v${VERSION}/vuetorrent.zip`;
    const HASH = parseFetchurl(URL);

    const fileText = genVueText(VERSION, HASH, URL);

    writeFileSync(FILE, fileText);

    return OLD_VERSION !== VERSION ? `Vuetorrent: ${OLD_VERSION} -> ${VERSION}` : '';
};

export const updateCustomPackage = (pkg: string) => spawnSync(
    `nix run ${FLAKE}#${pkg}.update`,
    [],
    { shell: true },
).stderr.toString();

export const runNixUpdate = (attr: string, options: string[] = []) => spawnSync(
    'nix-update',
    ['--flake', attr, ...options],
    { shell: true, cwd: FLAKE },
).stderr.toString();