'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

module.exports = function http_build_query(formdata, numericPrefix, argSeparator) {
  // eslint-disable-line camelcase
  //  discuss at: http://locutus.io/php/http_build_query/
  // original by: Kevin van Zonneveld (http://kvz.io)
  // improved by: Legaev Andrey
  // improved by: Michael White (http://getsprink.com)
  // improved by: Kevin van Zonneveld (http://kvz.io)
  // improved by: Brett Zamir (http://brett-zamir.me)
  //  revised by: stag019
  //    input by: Dreamer
  // bugfixed by: Brett Zamir (http://brett-zamir.me)
  // bugfixed by: MIO_KODUKI (http://mio-koduki.blogspot.com/)
  //      note 1: If the value is null, key and value are skipped in the
  //      note 1: http_build_query of PHP while in locutus they are not.
  //   example 1: http_build_query({foo: 'bar', php: 'hypertext processor', baz: 'boom', cow: 'milk'}, '', '&')
  //   returns 1: 'foo=bar&php=hypertext+processor&baz=boom&cow=milk'
  //   example 2: http_build_query({'php': 'hypertext processor', 0: 'foo', 1: 'bar', 2: 'baz', 3: 'boom', 'cow': 'milk'}, 'myvar_')
  //   returns 2: 'myvar_0=foo&myvar_1=bar&myvar_2=baz&myvar_3=boom&php=hypertext+processor&cow=milk'

  var urlencode = require('../url/urlencode');

  var value;
  var key;
  var tmp = [];

  var _httpBuildQueryHelper = function _httpBuildQueryHelper(key, val, argSeparator) {
    var k;
    var tmp = [];
    if (val === true) {
      val = '1';
    } else if (val === false) {
      val = '0';
    }
    if (val !== null) {
      if ((typeof val === 'undefined' ? 'undefined' : _typeof(val)) === 'object') {
        for (k in val) {
          if (val[k] !== null) {
            tmp.push(_httpBuildQueryHelper(key + '[' + k + ']', val[k], argSeparator));
          }
        }
        return tmp.join(argSeparator);
      } else if (typeof val !== 'function') {
        return urlencode(key) + '=' + urlencode(val);
      } else {
        throw new Error('There was an error processing for http_build_query().');
      }
    } else {
      return '';
    }
  };

  if (!argSeparator) {
    argSeparator = '&';
  }
  for (key in formdata) {
    value = formdata[key];
    if (numericPrefix && !isNaN(key)) {
      key = String(numericPrefix) + key;
    }
    var query = _httpBuildQueryHelper(key, value, argSeparator);
    if (query !== '') {
      tmp.push(query);
    }
  }

  return tmp.join(argSeparator);
};
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