#!/usr/bin/env node

// Usage: ./run-cpu.js -f code.asm [--debug] [--step] [--pretty]

const fs = require('fs');
const computer = require('./cpu.js');
const assembler = require('./assembler.js');
const { logRunningHeader } = require('./logging.js');


// Load file...

let filename = null;
process.argv.forEach((arg, index) => {
  if (arg === '-f' && process.argv.length > (index -1)) {
    filename = process.argv[index + 1];
  }
});

if (!filename) {
  console.error('Filename required');
  console.error('eg: run-cpu.js -f code.asm');
  process.exit()
}

const inputFile_str = fs.readFileSync(filename, 'utf8');


// Check optional arguments...

let debug = false;
let singleStep = false;
let prettyPrint = false;
process.argv.forEach((arg) => { if (arg === '--debug')  { debug = true } });
process.argv.forEach((arg) => { if (arg === '--step')   { singleStep = true } });
process.argv.forEach((arg) => { if (arg === '--pretty') { prettyPrint = true } });

let speed = null;
process.argv.forEach((arg, index) => {
  if (arg === '--speed' && process.argv.length > (index -1)) {
    speed = parseInt(process.argv[index + 1]);
  }
});


let assemblerOutput = assembler.assemble(inputFile_str);
logRunningHeader();
computer.runProgram(
  assemblerOutput.machineCode,
  assemblerOutput.debugInfo,
  debug,
  singleStep,
  prettyPrint,
  speed
);