import {Pipe, Compose, S, T} from 'hotscript'

export type CamelCase<Str> = Pipe<Str, [
  // try replacing this
  S.Replace<'([A-Z]_?[a-z])|([a-z]_?[A-Z])', '&1-&2'>,
  // with:
  // S.Replace<'_', '-'>,
  S.Split<'-'>,
  T.Map<Compose<[S.Capitalize, S.Lowercase]>>,
  T.Join<''>,
  S.Uncapitalize
]>


type res1 = CamelCase<'ONE_two-three'>;
//   ^?
type test1 = Expect<Equal<res1, 'oneTwoThree'>>;
type res2 = CamelCase<'one_TWO-three'>;
//   ^?
type test2 = Expect<Equal<res2, 'oneTwoThree'>>;
type res3 = CamelCase<'one_two-THREE'>;
//   ^?
type test3 = Expect<Equal<res3, 'oneTwoThree'>>;
type res4 = CamelCase<'ONE_TWO-THREE'>;
//   ^?
type test4 = Expect<Equal<res4, 'oneTwoThree'>>;
type res5 = CamelCase<"alreadyInCamelCase">
//   ^?
type test5 = Expect<Equal<res5, 'alreadyInCamelCase'>>;




export type Equal<X, Y> = (<T>() => T extends X ? 1 : 2) extends <
    T,
>() => T extends Y ? 1 : 2
    ? true
    : false;

export type Expect<T extends true> = T;