angarg12 / nucleogenesis

/*jslint node: true */

'use strict';

let jsonfile = require('jsonfile');

let resources = jsonfile.readFileSync('build/data/resources.json');

let elements = jsonfile.readFileSync('build/data/elements.json');

let numberToElement = {};

for (let element in elements) {

  numberToElement[elements[element].number] = element;

  let isotopes = elements[element].isotopes;

  for (let isotope in isotopes) {

    if (isotopes[isotope].ratio === 0) {

      if (!isDecayProduct(isotope) && !isFusionProduct(isotope)) {

        throw new Error(isotope, 'cannot be obtained.');

      }

    }

  }

}

function isFusionProduct(isotope) {

  let number = parseInt(isotope, 10);

  let element = isotope.replace(number, '');

  let elementNumber = elements[element].number;

  for (let i = 1; i < elementNumber; i++) {

    let elem1 = numberToElement[i];

    let elem2 = numberToElement[elementNumber - i];

    for (let iso1 in elements[elem1].isotopes) {

      for (let iso2 in elements[elem2].isotopes) {

        let num1 = parseInt(iso1, 10);

        let num2 = parseInt(iso2, 10);

        if (num1 + num2 === number) {

          return true;

        }

      }

    }

  }

  return false;

}