package com.hypixel.hytale.builtin.hytalegenerator.props.directionality;

import com.hypixel.hytale.builtin.hytalegenerator.framework.math.SeedGenerator;
import com.hypixel.hytale.builtin.hytalegenerator.patterns.Pattern;
import com.hypixel.hytale.builtin.hytalegenerator.scanners.Scanner;
import com.hypixel.hytale.math.util.FastRandom;
import com.hypixel.hytale.math.vector.Vector3i;
import com.hypixel.hytale.server.core.prefab.PrefabRotation;
import java.util.Collections;
import java.util.List;
import javax.annotation.Nonnull;

public class RandomDirectionality extends Directionality {
   @Nonnull
   private final List<PrefabRotation> rotations;
   @Nonnull
   private final Pattern pattern;
   @Nonnull
   private final SeedGenerator seedGenerator;

   public RandomDirectionality(@Nonnull Pattern pattern, int seed) {
      this.pattern = pattern;
      this.seedGenerator = new SeedGenerator(seed);
      this.rotations = Collections.unmodifiableList(
         List.of(PrefabRotation.ROTATION_0, PrefabRotation.ROTATION_90, PrefabRotation.ROTATION_180, PrefabRotation.ROTATION_270)
      );
   }

   @Nonnull
   @Override
   public Pattern getGeneralPattern() {
      return this.pattern;
   }

   @Nonnull
   @Override
   public Vector3i getReadRangeWith(@Nonnull Scanner scanner) {
      return scanner.readSpaceWith(this.pattern).getRange();
   }

   @Nonnull
   @Override
   public List<PrefabRotation> getPossibleRotations() {
      return this.rotations;
   }

   @Override
   public PrefabRotation getRotationAt(@Nonnull Pattern.Context context) {
      FastRandom random = new FastRandom(this.seedGenerator.seedAt((long)context.position.x, (long)context.position.y, (long)context.position.z));
      return this.rotations.get(random.nextInt(this.rotations.size()));
   }
}