'use strict';

/* eslint no-invalid-this: 1 */

var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible '; var slice = Array.prototype.slice; var toStr = Object.prototype.toString; var funcType = '[object Function]';

module.exports = function bind(that) {

var target = this;
if (typeof target !== 'function' || toStr.call(target) !== funcType) {
    throw new TypeError(ERROR_MESSAGE + target);
}
var args = slice.call(arguments, 1);

var bound;
var binder = function () {
    if (this instanceof bound) {
        var result = target.apply(
            this,
            args.concat(slice.call(arguments))
        );
        if (Object(result) === result) {
            return result;
        }
        return this;
    } else {
        return target.apply(
            that,
            args.concat(slice.call(arguments))
        );
    }
};

var boundLength = Math.max(0, target.length - args.length);
var boundArgs = [];
for (var i = 0; i < boundLength; i++) {
    boundArgs.push('$' + i);
}

bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);

if (target.prototype) {
    var Empty = function Empty() {};
    Empty.prototype = target.prototype;
    bound.prototype = new Empty();
    Empty.prototype = null;
}

return bound;

};