/**
 * Simple `pipe` implementation
 */
// prettier-ignore
export const pipe: {
  <T, R>(
    f1: (request: T) => R
  ): (source: T) => R
  <T, T1, R>(
    f1: (request: T) => T1,
    f2: (request: T1) => R
  ): (source: T) => R
  <T, T1, T2, R>(
    f1: (request: T) => T1,
    f2: (request: T1) => T2,
    f3: (request: T2) => R
  ): (source: T) => R
  <T, T1, T2, T3, R>(
    f1: (request: T) => T1,
    f2: (request: T1) => T2,
    f3: (request: T2) => T3,
    f4: (request: T3) => R
  ): (source: T) => R
  <T, T1, T2, T3, T4, R>(
    f1: (request: T) => T1,
    f2: (request: T1) => T2,
    f3: (request: T2) => T3,
    f4: (request: T3) => T4,
    f5: (request: T4) => R
  ): (source: T) => R
  <T, T1, T2, T3, T4, T5, R>(
    f1: (request: T) => T1,
    f2: (request: T1) => T2,
    f3: (request: T2) => T3,
    f4: (request: T3) => T4,
    f5: (request: T4) => T5,
    f6: (request: T5) => R
  ): (source: T) => R
} = <T>(...fns: ((request: T) => T)[]) => (source: T): T =>
  fns.reduce((request, fn) => fn(request), source)