/*
 * NOTICE OF LICENSE
 *
 * This product is licensed for one customer to use on one installation (test stores and multishop included).
 * Site developer has the right to modify this module to suit their needs, but can not redistribute the module in
 * whole or in part. Any other use of this module constitutes a violation of the user agreement.
 *
 * DISCLAIMER
 *
 * NO WARRANTIES OF DATA SAFETY OR MODULE SECURITY
 * ARE EXPRESSED OR IMPLIED. USE THIS MODULE IN ACCORDANCE
 * WITH YOUR MERCHANT AGREEMENT, KNOWING THAT VIOLATIONS OF
 * PCI COMPLIANCY OR A DATA BREACH CAN COST THOUSANDS OF DOLLARS
 * IN FINES AND DAMAGE A STORES REPUTATION. USE AT YOUR OWN RISK.
 *
 * @author    idnovate.com <info@idnovate.com>
 * @copyright 2022 idnovate.com
 * @license   See above
 */

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.registerHelper("fold", "markdown", function(cm, start) {
  var maxDepth = 100;

  function isHeader(lineNo) {
    var tokentype = cm.getTokenTypeAt(CodeMirror.Pos(lineNo, 0));
    return tokentype && /\bheader\b/.test(tokentype);
  }

  function headerLevel(lineNo, line, nextLine) {
    var match = line && line.match(/^#+/);
    if (match && isHeader(lineNo)) return match[0].length;
    match = nextLine && nextLine.match(/^[=\-]+\s*$/);
    if (match && isHeader(lineNo + 1)) return nextLine[0] == "=" ? 1 : 2;
    return maxDepth;
  }

  var firstLine = cm.getLine(start.line), nextLine = cm.getLine(start.line + 1);
  var level = headerLevel(start.line, firstLine, nextLine);
  if (level === maxDepth) return undefined;

  var lastLineNo = cm.lastLine();
  var end = start.line, nextNextLine = cm.getLine(end + 2);
  while (end < lastLineNo) {
    if (headerLevel(end + 1, nextLine, nextNextLine) <= level) break;
    ++end;
    nextLine = nextNextLine;
    nextNextLine = cm.getLine(end + 2);
  }

  return {
    from: CodeMirror.Pos(start.line, firstLine.length),
    to: CodeMirror.Pos(end, cm.getLine(end).length)
  };
});

});