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package cyclops.instances.control;

import com.oath.cyclops.hkt.DataWitness.lazyEither3;
import com.oath.cyclops.hkt.Higher;
import cyclops.arrow.Cokleisli;
import cyclops.arrow.Kleisli;
import cyclops.control.Either;
import cyclops.control.LazyEither3;
import cyclops.control.Maybe;
import cyclops.control.Option;
import cyclops.function.Monoid;
import cyclops.hkt.Active;
import cyclops.hkt.Nested;
import cyclops.typeclasses.*;
import cyclops.typeclasses.comonad.Comonad;
import cyclops.typeclasses.foldable.Foldable;
import cyclops.typeclasses.foldable.Unfoldable;
import cyclops.arrow.MonoidK;
import cyclops.typeclasses.functor.Functor;
import cyclops.typeclasses.monad.*;
import lombok.AllArgsConstructor;

import java.util.function.Function;

import static cyclops.control.LazyEither3.narrowK;

public  interface LazyEither3Instances {
  public static   Kleisli, LT2>,LazyEither3,T> kindKleisli(){
    return Kleisli.of(LazyEither3Instances.monad(), LazyEither3::widen);
  }

  public static   Cokleisli,LT2>,T,LazyEither3> kindCokleisli(){
    return Cokleisli.of(LazyEither3::narrowK);
  }
  public static  Active, LT2>,RT> allTypeclasses(LazyEither3 l3){
    return Active.of(l3, LazyEither3Instances.definitions());
  }
  public static   Nested, LT2>,W2,R> mapM(LazyEither3 l3, Function> fn, InstanceDefinitions defs){
    return Nested.of(l3.map(fn), LazyEither3Instances.definitions(), defs);
  }
  public static  InstanceDefinitions, L2>> definitions() {
    return new InstanceDefinitions, L2>> () {


      @Override
      public  Functor, L2>> functor() {
        return LazyEither3Instances.functor();
      }

      @Override
      public  Pure, L2>> unit() {
        return LazyEither3Instances.unit();
      }

      @Override
      public  Applicative, L2>> applicative() {
        return LazyEither3Instances.applicative();
      }

      @Override
      public  Monad, L2>> monad() {
        return LazyEither3Instances.monad();
      }

      @Override
      public  Option, L2>>> monadZero() {
        return Option.none();
      }

      @Override
      public  Option, L2>>> monadPlus() {
        return Option.none();
      }

      @Override
      public  MonadRec, L2>> monadRec() {
        return LazyEither3Instances.monadRec();
      }

      @Override
      public  Option, L2>>> monadPlus(MonoidK, L2>> m) {
        return Maybe.nothing();
      }

      @Override
      public  Traverse, L2>> traverse() {
        return LazyEither3Instances.traverse();
      }

      @Override
      public  Foldable, L2>> foldable() {
        return LazyEither3Instances.foldable();
      }

      @Override
      public  Option, L2>>> comonad() {
        return Option.none();
      }

      @Override
      public  Option, L2>>> unfoldable() {
        return Option.none();
      }
    };

  }
     final static LazyEither3Typeclasses INSTANCE = new LazyEither3Typeclasses<>();
    public static   LazyEither3Typeclasses getInstance(){
        return INSTANCE;
    }

    @AllArgsConstructor
    public static class LazyEither3Typeclasses  implements Monad, L2>>,
                                                                     MonadRec, L2>>,
                                                                     Traverse, L2>>,
                                                                     Foldable, L2>>{

        @Override
        public  T foldRight(Monoid monoid, Higher, L2>, T> ds) {
            return narrowK(ds).fold(monoid);
        }

        @Override
        public  T foldLeft(Monoid monoid, Higher, L2>, T> ds) {
            return narrowK(ds).fold(monoid);
        }
        @Override
        public  R foldMap(Monoid mb, Function fn, Higher, L2>, T> nestedA) {
            return foldLeft(mb,narrowK(nestedA).map(fn));
        }

        @Override
        public  Higher, L2>, R> flatMap(Function, L2>, R>> fn, Higher, L2>, T> ds) {
            return narrowK(ds).flatMap(fn.andThen(m->narrowK(m)));
        }

        @Override
        public  Higher, L2>, R>> traverseA(Applicative applicative, Function> fn, Higher, L2>, T> ds) {
            LazyEither3 maybe = narrowK(ds);
            return maybe.fold(left->  applicative.unit(LazyEither3.left1(left)),
                middle->applicative.unit(LazyEither3.left2(middle)),
                right->applicative.map(m-> LazyEither3.right(m), fn.apply(right)));
        }

        @Override
        public  Higher, L2>, T>> sequenceA(Applicative applicative, Higher, L2>, Higher> ds) {
            return null;
        }

        @Override
        public  Higher, L2>, R> ap(Higher, L2>, ? extends Function> fn, Higher, L2>, T> apply) {
            return  narrowK(fn).flatMap(x -> narrowK(apply).map(x));
        }

        @Override
        public  Higher, L2>, T> unit(T value) {
            return LazyEither3.right(value);
        }

        @Override
        public  Higher, L2>, R> map(Function fn, Higher, L2>, T> ds) {
            return null;
        }

        @Override
        public  Higher, L2>, R> tailRec(T initial, Function, L2>, ? extends Either>> fn) {
            return narrowK(fn.apply(initial)).flatMap( eval ->
                eval.fold(s->narrowK(tailRec(s,fn)), p-> LazyEither3.right(p)));
        }
    }
    public static  Functor, L2>> functor() {
    return new Functor, L2>>() {

      @Override
      public  Higher, L2>, R> map(Function fn, Higher, L2>, T> ds) {
        return narrowK(ds).map(fn);
      }
    };
  }
  public static  Pure, L2>> unit() {
    return INSTANCE;
  }
  public static  Applicative, L2>> applicative() {
    return INSTANCE;
  }
  public static  Monad, L2>> monad() {
    return INSTANCE;
  }
  public static  MonadRec, L2>> monadRec(){
    return INSTANCE;
  }

  public static   Traverse, L2>> traverse() {
    return INSTANCE;
  }
  public static  Foldable, L2>> foldable() {
    return INSTANCE;
  }


}