var isObject = require('./isObject'),

isSymbol = require('./isSymbol');

/** Used as references for various `Number` constants. */ var NAN = 0 / 0;

/** Used to match leading and trailing whitespace. */ var reTrim = /^s+|s+$/g;

/** Used to detect bad signed hexadecimal string values. */ var reIsBadHex = /^[-]0x[0-9a-f]$/i;

/** Used to detect binary string values. */ var reIsBinary = /^0b+$/i;

/** Used to detect octal string values. */ var reIsOctal = /^0o+$/i;

/** Built-in method references without a dependency on `root`. */ var freeParseInt = parseInt;

/**

* Converts `value` to a number.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to process.
* @returns {number} Returns the number.
* @example
*
* _.toNumber(3.2);
* // => 3.2
*
* _.toNumber(Number.MIN_VALUE);
* // => 5e-324
*
* _.toNumber(Infinity);
* // => Infinity
*
* _.toNumber('3.2');
* // => 3.2
*/

function toNumber(value) {

if (typeof value == 'number') {
  return value;
}
if (isSymbol(value)) {
  return NAN;
}
if (isObject(value)) {
  var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
  value = isObject(other) ? (other + '') : other;
}
if (typeof value != 'string') {
  return value === 0 ? value : +value;
}
value = value.replace(reTrim, '');
var isBinary = reIsBinary.test(value);
return (isBinary || reIsOctal.test(value))
  ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
  : (reIsBadHex.test(value) ? NAN : +value);

}

module.exports = toNumber;