//
// Copyright 2021 DXOS.org
//

import fs from 'fs';
const chalk = require('chalk');
import { exec, spawn } from 'child_process';

export const sorter = (p: string) => ({ [p]: a }: any, { [p]: b }: any) => a < b ? -1 : a > b ? 1 : 0;

export const printKeyValue = (key: string, value: string, color = 'grey', pad = 12) => {
  const left = key ? `- ${key}:` : ''
  console.log(`${(left).padEnd(pad - 1, ' ')} ${chalk[color](value)}`);
}

export const deleteFile = (file: string) => {
  fs.existsSync(file) && fs.unlinkSync(file);
}

export const writeFile = (file: string, text: string) => {
  fs.writeFileSync(file, text);
}

// TODO(burdon): Change to spawn for streaming results.
// https://stackoverflow.com/questions/10232192/exec-display-stdout-live
export const asyncExec = async (cmd: string, verbose?: boolean) => {
  return new Promise<string>((resolve, reject) => {
    exec(cmd, (error, stdout, stderr) => {
      if (error) {
        if (verbose) {
          console.error(stderr);
        }

        reject(error);
      } else {
        resolve(stdout.trim());
      }
    });
  });
};

// TODO(burdon): See spawn.ts
export const asyncSpawn = async (cmd: string, args: any[], logger = console.log) => {
  return new Promise<number>((resolve, reject) => {
    const child = spawn(cmd, args);
    child.stdout.on('data', (data) => {
      logger(data.toString());
    });

    child.stderr.on('data', (data) => {
      console.error(data.toString());
      reject(data);
    });

    child.on('exit', (code: number) => {
      resolve(code);
    });
  });
}