export interface Foldable<F extends TypeLambda> extends TypeClass<F> {
  readonly reduce: {
    <A, B>(b: B, f: (b: B, a: A) => B): <R, O, E>(self: Kind<F, R, O, E, A>) => B
    <R, O, E, A, B>(self: Kind<F, R, O, E, A>, b: B, f: (b: B, a: A) => B): B
  }
}

export declare const combineMap: <F extends TypeLambda>(
  F: Foldable<F>
) => <M>(M: Monoid<M>) => {
  <A>(f: (a: A) => M): <R, O, E>(self: Kind<F, R, O, E, A>) => M
  <R, O, E, A>(self: Kind<F, R, O, E, A>, f: (a: A) => M): M
}

export declare const coproductMapKind: <F extends TypeLambda>(
  F: Foldable<F>
) => <G extends TypeLambda>(
  G: Coproduct<G>
) => {
  <A, R, O, E, B>(f: (a: A) => Kind<G, R, O, E, B>): <FR, FO, FE>(self: Kind<F, FR, FO, FE, A>) => Kind<G, R, O, E, B>
  <FR, FO, FE, A, R, O, E, B>(self: Kind<F, FR, FO, FE, A>, f: (a: A) => Kind<G, R, O, E, B>): Kind<G, R, O, E, B>
}

export declare const reduceComposition: <F extends TypeLambda, G extends TypeLambda>(
  F: Foldable<F>,
  G: Foldable<G>
) => <FR, FO, FE, GR, GO, GE, A, B>(self: Kind<F, FR, FO, FE, Kind<G, GR, GO, GE, A>>, b: B, f: (b: B, a: A) => B) => B

export declare const reduceKind: <F extends TypeLambda>(
  F: Foldable<F>
) => <G extends TypeLambda>(
  G: Monad<G>
) => {
  <B, A, R, O, E>(
    b: B,
    f: (b: B, a: A) => Kind<G, R, O, E, B>
  ): <FR, FO, FE>(self: Kind<F, FR, FO, FE, A>) => Kind<G, R, O, E, B>
  <FR, FO, FE, A, B, R, O, E>(
    self: Kind<F, FR, FO, FE, A>,
    b: B,
    f: (b: B, a: A) => Kind<G, R, O, E, B>
  ): Kind<G, R, O, E, B>
}

export declare const toArray: <F extends TypeLambda>(
  F: Foldable<F>
) => <R, O, E, A>(self: Kind<F, R, O, E, A>) => Array<A>

export declare const toArrayMap: <F extends TypeLambda>(
  F: Foldable<F>
) => {
  <A, B>(f: (a: A) => B): <R, O, E>(self: Kind<F, R, O, E, A>) => Array<B>
  <R, O, E, A, B>(self: Kind<F, R, O, E, A>, f: (a: A) => B): Array<B>
}