"use strict";

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }

function _iterableToArrayLimit(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

const forOwn = require("../loop/each/forOwn");

const isPairs = require("../is/arrayOfPairs");

const isNil = require("../is/nullOrUndefined");

const isMap = require("../is/map");

const isObj = require("../is/obj");

const newMap = require("../construct/map");

const toPairs = require("./toPairs"); // Array => Map


const fromPairsToMap = function fromPairsToMap(x) {
  const map = newMap();
  forOwn(x, pair => {
    const _pair = _slicedToArray(pair, 2),
          key = _pair[0],
          value = _pair[1];

    map.set(key, value);
  });
  return map;
}; // Nil => empty(Map)
// Map => identity(Map) // can also clone map this way too, an entity for Map
// Pairs => Map
// Array => Map
// Obj => Array => Map

/**
 * @since 5.0.0-beta.9
 * @memberOf cast
 *
 * @param  {*} x anything => Map
 * @return {Map}
 *
 * @example
 *   isMap(toMap({eh: true}))    //=> true
 *   toMap({eh: true}).has('eh') //=> true
 */


const toMap = function toMap(x) {
  // if (isNil(x)) return newMap()
  if (isMap(x)) return x;else if (isPairs(x)) return fromPairsToMap(x);else if (isObj(x)) return fromPairsToMap(toPairs(x));else return newMap();
};

module.exports = toMap;