package com.hypixel.hytale.math.vector;

import com.hypixel.hytale.codec.Codec;
import com.hypixel.hytale.codec.KeyedCodec;
import com.hypixel.hytale.codec.builder.BuilderCodec;
import com.hypixel.hytale.codec.validation.Validators;
import com.hypixel.hytale.math.Axis;
import com.hypixel.hytale.math.util.MathUtil;
import com.hypixel.hytale.math.util.TrigMathUtil;
import java.util.Objects;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class Transform {
   @Nonnull
   public static final BuilderCodec<Transform> CODEC = BuilderCodec.builder(Transform.class, Transform::new)
      .appendInherited(
         new KeyedCodec<>("X", Codec.DOUBLE), (o, i) -> o.getPosition().x = i, o -> o.getPosition().x, (o, p) -> o.getPosition().x = p.getPosition().x
      )
      .addValidator(Validators.nonNull())
      .add()
      .<Double>appendInherited(
         new KeyedCodec<>("Y", Codec.DOUBLE), (o, i) -> o.getPosition().y = i, o -> o.getPosition().y, (o, p) -> o.getPosition().y = p.getPosition().y
      )
      .addValidator(Validators.nonNull())
      .add()
      .<Double>appendInherited(
         new KeyedCodec<>("Z", Codec.DOUBLE), (o, i) -> o.getPosition().z = i, o -> o.getPosition().z, (o, p) -> o.getPosition().z = p.getPosition().z
      )
      .addValidator(Validators.nonNull())
      .add()
      .appendInherited(
         new KeyedCodec<>("Pitch", Codec.FLOAT),
         (o, i) -> o.getRotation().x = i,
         o -> Float.isNaN(o.getRotation().x) ? null : o.getRotation().x,
         (o, p) -> o.getRotation().x = p.getRotation().x
      )
      .add()
      .appendInherited(
         new KeyedCodec<>("Yaw", Codec.FLOAT),
         (o, i) -> o.getRotation().y = i,
         o -> Float.isNaN(o.getRotation().y) ? null : o.getRotation().y,
         (o, p) -> o.getRotation().y = p.getRotation().y
      )
      .add()
      .appendInherited(
         new KeyedCodec<>("Roll", Codec.FLOAT),
         (o, i) -> o.getRotation().z = i,
         o -> Float.isNaN(o.getRotation().z) ? null : o.getRotation().z,
         (o, p) -> o.getRotation().z = p.getRotation().z
      )
      .add()
      .build();
   @Nonnull
   public static final BuilderCodec<Transform> CODEC_DEGREES = BuilderCodec.builder(Transform.class, Transform::new)
      .appendInherited(
         new KeyedCodec<>("X", Codec.DOUBLE), (o, i) -> o.getPosition().x = i, o -> o.getPosition().x, (o, p) -> o.getPosition().x = p.getPosition().x
      )
      .addValidator(Validators.nonNull())
      .add()
      .<Double>appendInherited(
         new KeyedCodec<>("Y", Codec.DOUBLE), (o, i) -> o.getPosition().y = i, o -> o.getPosition().y, (o, p) -> o.getPosition().y = p.getPosition().y
      )
      .addValidator(Validators.nonNull())
      .add()
      .<Double>appendInherited(
         new KeyedCodec<>("Z", Codec.DOUBLE), (o, i) -> o.getPosition().z = i, o -> o.getPosition().z, (o, p) -> o.getPosition().z = p.getPosition().z
      )
      .addValidator(Validators.nonNull())
      .add()
      .appendInherited(
         new KeyedCodec<>("Pitch", Codec.FLOAT),
         (o, i) -> o.getRotation().x = (float)Math.toRadians(i.floatValue()),
         o -> Float.isNaN(o.getRotation().x) ? null : (float)Math.toDegrees(o.getRotation().x),
         (o, p) -> o.getRotation().x = p.getRotation().x
      )
      .add()
      .appendInherited(
         new KeyedCodec<>("Yaw", Codec.FLOAT),
         (o, i) -> o.getRotation().y = (float)Math.toRadians(i.floatValue()),
         o -> Float.isNaN(o.getRotation().y) ? null : (float)Math.toDegrees(o.getRotation().y),
         (o, p) -> o.getRotation().y = p.getRotation().y
      )
      .add()
      .appendInherited(
         new KeyedCodec<>("Roll", Codec.FLOAT),
         (o, i) -> o.getRotation().z = (float)Math.toRadians(i.floatValue()),
         o -> Float.isNaN(o.getRotation().z) ? null : (float)Math.toDegrees(o.getRotation().z),
         (o, p) -> o.getRotation().z = p.getRotation().z
      )
      .add()
      .build();
   @Nonnull
   protected Vector3d position;
   @Nonnull
   protected Vector3f rotation;
   public static final int X_IS_RELATIVE = 1;
   public static final int Y_IS_RELATIVE = 2;
   public static final int Z_IS_RELATIVE = 4;
   public static final int YAW_IS_RELATIVE = 8;
   public static final int PITCH_IS_RELATIVE = 16;
   public static final int ROLL_IS_RELATIVE = 32;
   public static final int RELATIVE_TO_BLOCK = 64;

   public Transform() {
      this(new Vector3d(), new Vector3f(Float.NaN, Float.NaN, Float.NaN));
   }

   public Transform(@Nonnull Vector3i position) {
      this(new Vector3d(position), new Vector3f(Float.NaN, Float.NaN, Float.NaN));
   }

   public Transform(@Nonnull Vector3d position) {
      this(new Vector3d(position), new Vector3f(Float.NaN, Float.NaN, Float.NaN));
   }

   public Transform(double x, double y, double z) {
      this(new Vector3d(x, y, z), new Vector3f(Float.NaN, Float.NaN, Float.NaN));
   }

   public Transform(double x, double y, double z, float pitch, float yaw, float roll) {
      this(new Vector3d(x, y, z), new Vector3f(pitch, yaw, roll));
   }

   public Transform(@Nonnull Vector3d position, @Nonnull Vector3f rotation) {
      this.position = position;
      this.rotation = rotation;
   }

   public void assign(@Nonnull Transform transform) {
      this.position.assign(transform.getPosition());
      this.rotation.assign(transform.getRotation());
   }

   @Nonnull
   public Vector3d getPosition() {
      return this.position;
   }

   public void setPosition(@Nonnull Vector3d position) {
      this.position = position;
   }

   @Nonnull
   public Vector3f getRotation() {
      return this.rotation;
   }

   public void setRotation(@Nonnull Vector3f rotation) {
      this.rotation = rotation;
   }

   @Nonnull
   public Vector3d getDirection() {
      return getDirection(this.rotation.getPitch(), this.rotation.getYaw());
   }

   @Nonnull
   public static Vector3d getDirection(float pitch, float yaw) {
      if (Float.isNaN(pitch)) {
         throw new IllegalStateException("Pitch can't be NaN");
      } else if (Float.isNaN(yaw)) {
         throw new IllegalStateException("Yaw can't be NaN");
      } else {
         double len = TrigMathUtil.cos(pitch);
         double x = len * -TrigMathUtil.sin(yaw);
         double y = TrigMathUtil.sin(pitch);
         double z = len * -TrigMathUtil.cos(yaw);
         return new Vector3d(x, y, z);
      }
   }

   @Nonnull
   public Vector3i getAxisDirection() {
      return this.getAxisDirection(this.rotation.getPitch(), this.rotation.getYaw());
   }

   @Nonnull
   public Vector3i getAxisDirection(float pitch, float yaw) {
      if (Float.isNaN(pitch)) {
         throw new IllegalStateException("Pitch can't be NaN");
      } else if (Float.isNaN(yaw)) {
         throw new IllegalStateException("Yaw can't be NaN");
      } else {
         float len = TrigMathUtil.cos(pitch);
         float x = len * -TrigMathUtil.sin(yaw);
         float y = TrigMathUtil.sin(pitch);
         float z = len * -TrigMathUtil.cos(yaw);
         return new Vector3i(MathUtil.fastRound(x), MathUtil.fastRound(y), MathUtil.fastRound(z));
      }
   }

   @Nonnull
   public Axis getAxis() {
      Vector3i axisDirection = this.getAxisDirection();
      if (axisDirection.getX() != 0) {
         return Axis.X;
      } else {
         return axisDirection.getY() != 0 ? Axis.Y : Axis.Z;
      }
   }

   @Nonnull
   public Transform clone() {
      return new Transform(this.position.clone(), this.rotation.clone());
   }

   @Override
   public boolean equals(@Nullable Object o) {
      if (this == o) {
         return true;
      } else if (o != null && this.getClass() == o.getClass()) {
         Transform transform = (Transform)o;
         return !Objects.equals(this.position, transform.position) ? false : Objects.equals(this.rotation, transform.rotation);
      } else {
         return false;
      }
   }

   @Override
   public int hashCode() {
      int result = this.position.hashCode();
      return 31 * result + this.rotation.hashCode();
   }

   @Nonnull
   @Override
   public String toString() {
      return "Transform{position=" + this.position + ", rotation=" + this.rotation + "}";
   }

   public static void applyMaskedRelativeTransform(
      @Nonnull Transform transform, byte relativeMask, @Nonnull Vector3d sourcePosition, @Nonnull Vector3f sourceRotation, @Nonnull Vector3i blockPosition
   ) {
      if (relativeMask != 0) {
         if ((relativeMask & 64) != 0) {
            if ((relativeMask & 1) != 0) {
               transform.getPosition().setX(transform.getPosition().getX() + blockPosition.getX());
            }

            if ((relativeMask & 2) != 0) {
               transform.getPosition().setY(transform.getPosition().getY() + blockPosition.getY());
            }

            if ((relativeMask & 4) != 0) {
               transform.getPosition().setZ(transform.getPosition().getZ() + blockPosition.getZ());
            }
         } else {
            if ((relativeMask & 1) != 0) {
               transform.getPosition().setX(transform.getPosition().getX() + sourcePosition.getX());
            }

            if ((relativeMask & 2) != 0) {
               transform.getPosition().setY(transform.getPosition().getY() + sourcePosition.getY());
            }

            if ((relativeMask & 4) != 0) {
               transform.getPosition().setZ(transform.getPosition().getZ() + sourcePosition.getZ());
            }
         }

         if ((relativeMask & 8) != 0) {
            transform.getRotation().setYaw(transform.getRotation().getYaw() + sourceRotation.getYaw());
         }

         if ((relativeMask & 16) != 0) {
            transform.getRotation().setPitch(transform.getRotation().getPitch() + sourceRotation.getPitch());
         }

         if ((relativeMask & 32) != 0) {
            transform.getRotation().setRoll(transform.getRotation().getRoll() + sourceRotation.getRoll());
         }
      }
   }
}