const fs = require('fs');
const path = require('path');
const { arrayToString } = require('./util');

const FONT_CHARACTER_FIRST = 33;
const FONT_DATA_POSITION = 4;

const getCodeFrom = l => {
  const cc = l.charCodeAt(0)
  if(l == '\n' || l == ' ') return cc;
  return cc - FONT_CHARACTER_FIRST + FONT_DATA_POSITION
}

const string2gb = (string, name, dirOut) => {
  const letters = [];
  for(let i = 0; i < string.length; i++) {
    letters.push(getCodeFrom(string[i]));
  }

  let outH = '#include "libs.h"\n\n';
  outH += `#define STR_${name}_LENGTH ${string.length}\n`;
  outH += `extern const uint8_t STR_${name}_DATA[];`;

  let outC = `#include "${name}.h"\n\n`;
  outC += `const uint8_t STR_${name}_DATA[] = {\n` + arrayToString(letters) + `\n};`;

  const fileH = path.join(dirOut, `${name}.h`);
  const fileC = path.join(dirOut, `${name}.c`);
  
  fs.writeFileSync(fileH, outH);
  fs.writeFileSync(fileC, outC);
  return { fileH, fileC };
}

module.exports = {
  string2gb
};