import Specifications from './type'
import configDependency from '../core/Config'
/// <reference path="../complex/type.ts">

declare module 'Dispatcher' {
   namespace Specifications {
      namespace NumberSpecifications {
         export const add = (a: number, b: number) => a + b
         export const unaryMinus = (a: number) => -a
         export const subtract = (a: number, b: number) => a - b
         export const multiply = (a: number, b: number) => a * b
         export const divide = (a: number, b: number) => a / b
         export const sqrt =
            (dep: configDependency
                  & ImplementationDependency<'complex', [number,number]>) => {
                if (dep.config.predictable || !dep.complex) {
                   return (a: number) => isNaN(n) ? NaN : Math.sqrt(n)
                }
                return (a: number) => {
                   if (isNaN(n)) return NaN
                   if (n >= 0) return Math.sqrt(n)
                   return dep.complex(0, Math.sqrt(unaryMinus(n)))
                }
             }
      }
   }
}

export {Specifications}