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package cyclops.instances.data.tuple;

import com.oath.cyclops.hkt.DataWitness.tuple1;
import com.oath.cyclops.hkt.Higher;
import cyclops.control.Either;
import cyclops.control.Identity;
import cyclops.control.Maybe;
import cyclops.control.Option;
import cyclops.data.tuple.Tuple1;
import cyclops.function.Monoid;
import cyclops.arrow.Cokleisli;
import cyclops.typeclasses.InstanceDefinitions;
import cyclops.arrow.Kleisli;
import cyclops.typeclasses.Pure;
import cyclops.typeclasses.comonad.Comonad;
import cyclops.typeclasses.comonad.ComonadByPure;
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.data.tuple.Tuple1.narrowK;

public class Tuple1Instances {
  public static  Identity toIdentity(Tuple1 t1){
    return Identity.of(t1._1());
  }
  public static InstanceDefinitions definitions(){
    return new InstanceDefinitions() {
      @Override
      public  Functor functor() {
        return Tuple1Instances.functor();
      }

      @Override
      public  Pure unit() {
        return Tuple1Instances.unit();
      }

      @Override
      public  Applicative applicative() {
        return Tuple1Instances.applicative();
      }

      @Override
      public  Monad monad() {
        return Tuple1Instances.monad();
      }

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

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

      @Override
      public  MonadRec monadRec() {
        return Tuple1Instances.monadRec();
      }

      @Override
      public  Option> monadPlus(MonoidK m) {
        return Option.none();
      }

      @Override
      public  Traverse traverse() {
        return Tuple1Instances.traverse();
      }

      @Override
      public  Foldable foldable() {
        return Tuple1Instances.foldable();
      }

      @Override
      public  Option> comonad() {
        return Option.some(Tuple1Instances.comonad());
      }

      @Override
      public  Option> unfoldable() {
        return Option.none();
      }
    };
  }
    private final static Tuple1Typeclasses INSTANCE = new Tuple1Typeclasses();

    @AllArgsConstructor
    public static class Tuple1Typeclasses  implements Monad,
                                                        MonadRec,
                                                        TraverseByTraverse,
                                                        Foldable,
                                                        Comonad{

        @Override
        public  T foldRight(Monoid monoid, Higher ds) {
            return monoid.apply(narrowK(ds)._1(),monoid.zero());
        }



        @Override
        public  T foldLeft(Monoid monoid, Higher ds) {
            return monoid.apply(monoid.zero(),narrowK(ds)._1());
        }



        @Override
        public  Higher flatMap(Function> fn, Higher ds) {
            return Tuple1.narrowK(ds).flatMap(t-> Tuple1.narrowK(fn.apply(t)));
        }

        @Override
        public  Higher> traverseA(Applicative applicative, Function> fn, Higher ds) {
            Tuple1 tuple1 = Tuple1.narrowK(ds);
            return applicative.map(Tuple1::of, fn.apply(tuple1._1()));
        }

        @Override
        public  R foldMap(Monoid mb, Function fn, Higher ds) {
            Tuple1  opt  = Tuple1.narrowK(ds).map(fn);
            return foldLeft(mb,opt);
        }

        @Override
        public  Higher ap(Higher> fn, Higher apply) {
            return Tuple1.narrowK(apply).zip(Tuple1.narrowK(fn), (a, b)->b.apply(a));
        }

        @Override
        public  Higher unit(T value) {
            return Tuple1.of(value);
        }

        @Override
        public  Higher map(Function fn, Higher ds) {
            return Tuple1.narrowK(ds).map(fn);
        }

        @Override
        public  Higher tailRec(T initial, Function>> fn) {
            return Tuple1.tailRec(initial,t-> Tuple1.narrowK(fn.apply(t)));
        }

        @Override
        public  Higher> nest(Higher ds) {
            return Tuple1.of(ds);
        }

        @Override
        public  Higher coflatMap(Function, R> mapper, Higher ds) {
            return Tuple1.of(mapper.apply(ds));
        }

        @Override
        public  T extract(Higher ds) {
            return Tuple1.narrowK(ds)._1();
        }
    }
    public static Functor functor(){
        return INSTANCE;
    }

    public static  Pure unit(){
        return INSTANCE;
    }

    public static  Applicative applicative(){
        return INSTANCE;
    }

    public static  Monad monad(){
        return INSTANCE;
    }
    public static  Comonad comonad(){
        return INSTANCE;
    }
    public static  MonadRec monadRec(){

        return INSTANCE;
    }


    public static  Traverse traverse(){
        return INSTANCE;
    }


    public static  Foldable foldable(){
        return INSTANCE;
    }


  public static   Kleisli,T> kindKleisli(){
    return Kleisli.of(Tuple1Instances.monad(), Tuple1Instances::widen);
  }
  public static  Higher widen(Tuple1 narrow) {
    return narrow;
  }
  public static   Cokleisli> kindCokleisli(){
    return Cokleisli.of(Tuple1::narrowK);
  }
}