// @flow
import type { TimingFunction } from '../types/timingFunction'

/* eslint-disable key-spacing */
const functionsMap = {
  easeInBack: 'cubic-bezier(0.600, -0.280, 0.735, 0.045)',
  easeInCirc: 'cubic-bezier(0.600,  0.040, 0.980, 0.335)',
  easeInCubic: 'cubic-bezier(0.550,  0.055, 0.675, 0.190)',
  easeInExpo: 'cubic-bezier(0.950,  0.050, 0.795, 0.035)',
  easeInQuad: 'cubic-bezier(0.550,  0.085, 0.680, 0.530)',
  easeInQuart: 'cubic-bezier(0.895,  0.030, 0.685, 0.220)',
  easeInQuint: 'cubic-bezier(0.755,  0.050, 0.855, 0.060)',
  easeInSine: 'cubic-bezier(0.470,  0.000, 0.745, 0.715)',

  easeOutBack: 'cubic-bezier(0.175,  0.885, 0.320, 1.275)',
  easeOutCubic: 'cubic-bezier(0.215,  0.610, 0.355, 1.000)',
  easeOutCirc: 'cubic-bezier(0.075,  0.820, 0.165, 1.000)',
  easeOutExpo: 'cubic-bezier(0.190,  1.000, 0.220, 1.000)',
  easeOutQuad: 'cubic-bezier(0.250,  0.460, 0.450, 0.940)',
  easeOutQuart: 'cubic-bezier(0.165,  0.840, 0.440, 1.000)',
  easeOutQuint: 'cubic-bezier(0.230,  1.000, 0.320, 1.000)',
  easeOutSine: 'cubic-bezier(0.390,  0.575, 0.565, 1.000)',

  easeInOutBack: 'cubic-bezier(0.680, -0.550, 0.265, 1.550)',
  easeInOutCirc: 'cubic-bezier(0.785,  0.135, 0.150, 0.860)',
  easeInOutCubic: 'cubic-bezier(0.645,  0.045, 0.355, 1.000)',
  easeInOutExpo: 'cubic-bezier(1.000,  0.000, 0.000, 1.000)',
  easeInOutQuad: 'cubic-bezier(0.455,  0.030, 0.515, 0.955)',
  easeInOutQuart: 'cubic-bezier(0.770,  0.000, 0.175, 1.000)',
  easeInOutQuint: 'cubic-bezier(0.860,  0.000, 0.070, 1.000)',
  easeInOutSine: 'cubic-bezier(0.445,  0.050, 0.550, 0.950)',
}
/* eslint-enable key-spacing */

function getTimingFunction(functionName: string): string {
  return functionsMap[functionName]
}

/**
 * String to represent common easing functions as demonstrated here: (github.com/jaukia/easie).
 *
 * @deprecated - This will be deprecated in v5 in favor of `easeIn`, `easeOut`, `easeInOut`.
 *
 * @example
 * // Styles as object usage
 * const styles = {
 *   'transitionTimingFunction': timingFunctions('easeInQuad')
 * }
 *
 * // styled-components usage
 *  const div = styled.div`
 *   transitionTimingFunction: ${timingFunctions('easeInQuad')};
 * `
 *
 * // CSS as JS Output
 *
 * 'div': {
 *   'transitionTimingFunction': 'cubic-bezier(0.550,  0.085, 0.680, 0.530)',
 * }
 */

export default function timingFunctions(timingFunction: TimingFunction): string {
  return getTimingFunction(timingFunction)
}