/* Indonesian number formatting shared by the calculator and admin pages. */
(function (root) {
  'use strict';
  var nf0 = new Intl.NumberFormat('id-ID', { maximumFractionDigits: 0 });
  var nf2 = new Intl.NumberFormat('id-ID', { minimumFractionDigits: 2, maximumFractionDigits: 2 });
  var nfp = new Intl.NumberFormat('id-ID', { minimumFractionDigits: 0, maximumFractionDigits: 4 });

  var F = {
    /** 1234567.8 -> "Rp1.234.568" */
    rp: function (x) {
      var v = Math.round(Number(x) || 0);
      return (v < 0 ? '−Rp' : 'Rp') + nf0.format(Math.abs(v));
    },
    /** 0.027 -> "2,70%" */
    pct: function (x) { return nf2.format((Number(x) || 0) * 100) + '%'; },
    /** 0.0075 -> "0,75" (for inputs) */
    pctInput: function (x) { return nfp.format((Number(x) || 0) * 100); },
    num: function (x) { return nf0.format(Math.round(Number(x) || 0)); },
    /** "55.000.000" -> 55000000 */
    parseIdr: function (s) {
      var d = String(s == null ? '' : s).replace(/[^0-9]/g, '');
      return d === '' ? null : Number(d);
    },
    /** "0,75" / "0.75" -> 0.0075; "" -> null; invalid -> NaN */
    parsePct: function (s) {
      var t = String(s == null ? '' : s).replace(/[\s%]/g, '').replace(',', '.');
      if (t === '') return null;
      if (!/^-?\d+(\.\d+)?$/.test(t)) return NaN;
      return Math.round(parseFloat(t) * 1e6) / 1e8;
    },
    /** 50000000 -> "50 jt", 2e9 -> "2 M" */
    short: function (x) {
      var v = Number(x) || 0;
      if (v >= 1e12) return nfp.format(v / 1e12) + ' T';
      if (v >= 1e9) return nfp.format(v / 1e9) + ' M';
      if (v >= 1e6) return nfp.format(v / 1e6) + ' jt';
      return nf0.format(v);
    },
    /** Keeps the caret position stable while re-formatting a thousands-separated input. */
    liveFormatIdr: function (input) {
      var before = input.value;
      var caret = input.selectionStart == null ? before.length : input.selectionStart;
      var digitsBefore = before.slice(0, caret).replace(/[^0-9]/g, '').length;
      var n = F.parseIdr(before);
      var after = n === null ? '' : nf0.format(n);
      input.value = after;
      var pos = 0, seen = 0;
      while (pos < after.length && seen < digitsBefore) { if (/[0-9]/.test(after[pos])) seen++; pos++; }
      try { input.setSelectionRange(pos, pos); } catch (e) { /* not focusable */ }
      return n;
    }
  };
  root.SerubiFormat = F;
})(window);