#!/usr/bin/env -S npx ts-node

/*
 * Checks for the presence of a webapp, inspects its version and sets the
 * version metadata of the package to match.
 */

import { promises as fs } from "fs";
import * as asar from "asar";
import * as childProcess from "child_process";

export async function versionFromAsar(): Promise<string> {
    try {
        await fs.stat('webapp.asar');
    } catch (e) {
        throw new Error("No 'webapp.asar' found. Run 'yarn run fetch'");
    }

    return asar.extractFile('webapp.asar', 'version').toString().trim();
}

export async function setPackageVersion(ver: string): Promise<void> {
    // set version in package.json: electron-builder will use this to populate
    // all the various version fields
    await new Promise<void>((resolve, reject) => {
        childProcess.execFile(process.platform === 'win32' ? 'yarn.cmd' : 'yarn', [
            'version',
            '-s',
            '--no-git-tag-version', // This also means "don't commit to git" as it turns out
            '--new-version',
            ver,
        ], (err) => {
            if (err) {
                reject(err);
            } else {
                resolve();
            }
        });
    });
}

async function main(args: string[]): Promise<number> {
    let version = args[0];

    if (version === undefined) version = await versionFromAsar();

    await setPackageVersion(version);
    return 0;
}

if (require.main === module) {
    main(process.argv.slice(2)).then((ret) => {
        process.exit(ret);
    }).catch(e => {
        console.error(e);
        process.exit(1);
    });
}