var isArray = require('./array-helper').isArray;

module.exports = {

  copyOptions: function (options) {
    var key, copy = {};
    for (key in options) {
      if (options.hasOwnProperty(key)) {
        copy[key] = options[key];
      }
    }
    return copy;
  },

  ensureFlagExists: function (item, options) {
    if (!(item in options) || typeof options[item] !== 'boolean') {
      options[item] = false;
    }
  },

  ensureSpacesExists: function (options) {
    if (!('spaces' in options) || (typeof options.spaces !== 'number' && typeof options.spaces !== 'string')) {
      options.spaces = 0;
    }
  },

  ensureAlwaysArrayExists: function (options) {
    if (!('alwaysArray' in options) || (typeof options.alwaysArray !== 'boolean' && !isArray(options.alwaysArray))) {
      options.alwaysArray = false;
    }
  },

  ensureKeyExists: function (key, options) {
    if (!(key + 'Key' in options) || typeof options[key + 'Key'] !== 'string') {
      options[key + 'Key'] = options.compact ? '_' + key : key;
    }
  },

  checkFnExists: function (key, options) {
    return key + 'Fn' in options;
  }

};