import baseCreate from './baseCreate.js'
import isObject from '../isObject.js'

/**
 * Creates a function that produces an instance of `Ctor` regardless of
 * whether it was invoked as part of a `new` expression or by `call` or `apply`.
 *
 * @private
 * @param {Function} Ctor The constructor to wrap.
 * @returns {Function} Returns the new wrapped function.
 */
function createCtor(Ctor) {
  return function(...args) {
    // Use a `switch` statement to work with class constructors. See
    // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
    // for more details.
    switch (args.length) {
      case 0: return new Ctor
      case 1: return new Ctor(args[0])
      case 2: return new Ctor(args[0], args[1])
      case 3: return new Ctor(args[0], args[1], args[2])
      case 4: return new Ctor(args[0], args[1], args[2], args[3])
      case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4])
      case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5])
      case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6])
    }
    const thisBinding = baseCreate(Ctor.prototype)
    const result = Ctor.apply(thisBinding, args)

    // Mimic the constructor's `return` behavior.
    // See https://es5.github.io/#x13.2.2 for more details.
    return isObject(result) ? result : thisBinding
  }
}

export default createCtor