<?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\block;

use pocketmine\block\utils\SupportType;
use pocketmine\block\utils\TreeType;
use pocketmine\data\runtime\block\BlockDataReader;
use pocketmine\data\runtime\block\BlockDataWriter;
use pocketmine\event\block\LeavesDecayEvent;
use pocketmine\item\Item;
use pocketmine\item\VanillaItems;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\player\Player;
use pocketmine\utils\AssumptionFailedError;
use pocketmine\world\BlockTransaction;
use pocketmine\world\World;
use function mt_rand;

class Leaves extends Transparent{
	protected TreeType $treeType;
	protected bool $noDecay = false;
	protected bool $checkDecay = false;

	public function __construct(BlockIdentifier $idInfo, string $name, BlockBreakInfo $breakInfo, TreeType $treeType){
		parent::__construct($idInfo, $name, $breakInfo);
		$this->treeType = $treeType;
	}

	public function getRequiredStateDataBits() : int{ return 2; }

	protected function decodeState(BlockDataReader $r) : void{
		$this->noDecay = $r->readBool();
		$this->checkDecay = $r->readBool();
	}

	protected function encodeState(BlockDataWriter $w) : void{
		$w->writeBool($this->noDecay);
		$w->writeBool($this->checkDecay);
	}

	public function isNoDecay() : bool{ return $this->noDecay; }

	/** @return $this */
	public function setNoDecay(bool $noDecay) : self{
		$this->noDecay = $noDecay;
		return $this;
	}

	public function isCheckDecay() : bool{ return $this->checkDecay; }

	/** @return $this */
	public function setCheckDecay(bool $checkDecay) : self{
		$this->checkDecay = $checkDecay;
		return $this;
	}

	public function blocksDirectSkyLight() : bool{
		return true;
	}

	/**
	 * @param true[] $visited reference parameter
	 * @phpstan-param array<int, true> $visited
	 */
	protected function findLog(Vector3 $pos, array &$visited = [], int $distance = 0) : bool{
		$index = World::blockHash($pos->x, $pos->y, $pos->z);
		if(isset($visited[$index])){
			return false;
		}
		$visited[$index] = true;

		$block = $this->position->getWorld()->getBlock($pos);
		if($block instanceof Wood){ //type doesn't matter
			return true;
		}

		if($block instanceof Leaves && $distance <= 4){
			foreach(Facing::ALL as $side){
				if($this->findLog($pos->getSide($side), $visited, $distance + 1)){
					return true;
				}
			}
		}

		return false;
	}

	public function onNearbyBlockChange() : void{
		if(!$this->noDecay && !$this->checkDecay){
			$this->checkDecay = true;
			$this->position->getWorld()->setBlock($this->position, $this, false);
		}
	}

	public function ticksRandomly() : bool{
		return true;
	}

	public function onRandomTick() : void{
		if(!$this->noDecay && $this->checkDecay){
			$ev = new LeavesDecayEvent($this);
			$ev->call();
			if($ev->isCancelled() || $this->findLog($this->position)){
				$this->checkDecay = false;
				$this->position->getWorld()->setBlock($this->position, $this, false);
			}else{
				$this->position->getWorld()->useBreakOn($this->position);
			}
		}
	}

	public function place(BlockTransaction $tx, Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, ?Player $player = null) : bool{
		$this->noDecay = true; //artificial leaves don't decay
		return parent::place($tx, $item, $blockReplace, $blockClicked, $face, $clickVector, $player);
	}

	public function getDropsForCompatibleTool(Item $item) : array{
		if(($item->getBlockToolType() & BlockToolType::SHEARS) !== 0){
			return parent::getDropsForCompatibleTool($item);
		}

		$drops = [];
		if(mt_rand(1, 20) === 1){ //Saplings
			$drops[] = (match($this->treeType){
				TreeType::ACACIA() => VanillaBlocks::ACACIA_SAPLING(),
				TreeType::BIRCH() => VanillaBlocks::BIRCH_SAPLING(),
				TreeType::DARK_OAK() => VanillaBlocks::DARK_OAK_SAPLING(),
				TreeType::JUNGLE() => VanillaBlocks::JUNGLE_SAPLING(),
				TreeType::OAK() => VanillaBlocks::OAK_SAPLING(),
				TreeType::SPRUCE() => VanillaBlocks::SPRUCE_SAPLING(),
				default => throw new AssumptionFailedError("Unreachable")
			})->asItem();
		}
		if(($this->treeType->equals(TreeType::OAK()) || $this->treeType->equals(TreeType::DARK_OAK())) && mt_rand(1, 200) === 1){ //Apples
			$drops[] = VanillaItems::APPLE();
		}
		if(mt_rand(1, 50) === 1){
			$drops[] = VanillaItems::STICK()->setCount(mt_rand(1, 2));
		}

		return $drops;
	}

	public function isAffectedBySilkTouch() : bool{
		return true;
	}

	public function getFlameEncouragement() : int{
		return 30;
	}

	public function getFlammability() : int{
		return 60;
	}

	public function getSupportType(int $facing) : SupportType{
		return SupportType::NONE();
	}
}