#!/usr/bin/env node

// Input file must contain a binary string with no spaces, linebreaks, etc.

const fs = require('fs');
const filename = process.argv[2];
const inputFile_str = fs.readFileSync(filename, 'utf8');

const create_square_wave_string = (s) => {
  s = s.replace(/1/g, '▀');
  return s = s.replace(/0/g, '▄');
}

const number_hex_string = (quantity) => {
  let output = '';
  let current_digit = 0;
  for (let i = 0; i < quantity; i++) {
    current_digit = i % 8;
    output = output + current_digit;
  }
  return output;
}

const binary_string_to_bus_strings = (input) => {
  let output = ['','','','','','','',''];
  let input_bytes = input.match(/.{1,8}/g);

  input_bytes.forEach( (byte) => {
    let byte_array = byte.split('');
    for (let i = 0; i < 8; i++) {
      output[i] = output[i] + byte_array[i];
    }
  });


  // Print output
  let nums = number_hex_string(output[0].length);
  let spaced_nums = nums.match(/.{1,8}/g).join('  ');
  console.log();
  console.log(spaced_nums);

  output.forEach( (s) => {
    let spaced = s.match(/.{1,8}/g).join('  ');
    console.log(create_square_wave_string(spaced));
    console.log();
  });
  console.log(spaced_nums);
  console.log();
}

binary_string_to_bus_strings(inputFile_str);