<?php

/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
*/

declare(strict_types=1);

namespace pocketmine\level\generator\hell;

use pocketmine\block\Block;
use pocketmine\block\Gravel;
use pocketmine\block\Lava;
use pocketmine\block\NetherQuartzOre;
use pocketmine\block\SoulSand;
use pocketmine\level\biome\Biome;
use pocketmine\level\ChunkManager;
use pocketmine\level\generator\Generator;
use pocketmine\level\generator\noise\Simplex;
use pocketmine\level\generator\object\OreType;
use pocketmine\level\generator\populator\Ore;
use pocketmine\level\generator\populator\Populator;
use pocketmine\math\Vector3;
use pocketmine\utils\Random;
use function abs;

class Nether extends Generator{

	/** @var Populator[] */
	private $populators = [];
	/** @var int */
	private $lavaHeight = 32;
	/** @var int */
	private $emptyHeight = 64;
	/** @var int */
	private $emptyAmplitude = 1;
	/** @var float */
	private $density = 0.5;

	/** @var Populator[] */
	private $generationPopulators = [];
	/** @var Simplex */
	private $noiseBase;

	/**
	 * @param mixed[]                      $options
	 *
	 * @phpstan-param array<string, mixed> $options
	 *
	 * @throws InvalidGeneratorOptionsException
	 */
	public function __construct(array $options = []){

	}

	public function init(ChunkManager $level, Random $random) : void{
		parent::init($level, $random);

		$this->noiseBase = new Simplex($this->random, 4, 1 / 4, 1 / 64);
		$this->random->setSeed($this->level->getSeed());

		$ores = new Ore();
		$ores->setOreTypes([
			new OreType(new NetherQuartzOre(), 20, 16, 0, 128),
			new OreType(new SoulSand(), 5, 64, 0, 128),
			new OreType(new Gravel(), 5, 64, 0, 128),
			new OreType(new Lava(), 1, 16, 0, $this->lavaHeight)
		]);
		$this->populators[] = $ores;
	}

	public function getName() : string{
		return "nether";
	}

	public function getSettings() : array{
		return [];
	}

	public function generateChunk(int $chunkX, int $chunkZ) : void{
		$this->random->setSeed(0xdeadbeef ^ ($chunkX << 8) ^ $chunkZ ^ $this->level->getSeed());

		$noise = $this->noiseBase->getFastNoise3D(16, 128, 16, 4, 8, 4, $chunkX * 16, 0, $chunkZ * 16);

		$chunk = $this->level->getChunk($chunkX, $chunkZ);

		for($x = 0; $x < 16; ++$x){
			for($z = 0; $z < 16; ++$z){

				$biome = Biome::getBiome(Biome::HELL);
				$chunk->setBiomeId($x, $z, $biome->getId());

				for($y = 0; $y < 128; ++$y){
					if($y === 0 or $y === 127){
						$chunk->setBlock($x, $y, $z, Block::BEDROCK, 0);
						continue;
					}
					$noiseValue = (abs($this->emptyHeight - $y) / $this->emptyHeight) * $this->emptyAmplitude - $noise[$x][$z][$y];
					$noiseValue -= 1 - $this->density;

					if($noiseValue > 0){
						$chunk->setBlock($x, $y, $z, Block::NETHERRACK, 0);
					}elseif($y <= $this->lavaHeight){
						$chunk->setBlock($x, $y, $z, Block::STILL_LAVA, 0);
					}
				}
			}
		}

		foreach($this->generationPopulators as $populator){
			$populator->populate($this->level, $chunkX, $chunkZ, $this->random);
		}
	}

	public function populateChunk(int $chunkX, int $chunkZ) : void{
		$this->random->setSeed(0xdeadbeef ^ ($chunkX << 8) ^ $chunkZ ^ $this->level->getSeed());
		foreach($this->populators as $populator){
			$populator->populate($this->level, $chunkX, $chunkZ, $this->random);
		}

		$chunk = $this->level->getChunk($chunkX, $chunkZ);
		$biome = Biome::getBiome($chunk->getBiomeId(7, 7));
		$biome->populateChunk($this->level, $chunkX, $chunkZ, $this->random);
	}

	public function getSpawn() : Vector3{
		return new Vector3(127.5, 128, 127.5);
	}
}
