<?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\entity\Entity;
use pocketmine\item\Item;
use pocketmine\math\AxisAlignedBB;
use pocketmine\math\Facing;
use pocketmine\math\Vector3;
use pocketmine\Player;

class Vine extends Flowable{
	public const FLAG_SOUTH = 0x01;
	public const FLAG_WEST = 0x02;
	public const FLAG_NORTH = 0x04;
	public const FLAG_EAST = 0x08;

	protected $id = self::VINE;

	public function __construct(int $meta = 0){
		$this->meta = $meta;
	}

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

	public function getHardness() : float{
		return 0.2;
	}

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

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

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

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

	public function onEntityCollide(Entity $entity) : void{
		$entity->resetFallDistance();
	}

	protected function recalculateBoundingBox() : ?AxisAlignedBB{
		$minX = 1;
		$minY = 1;
		$minZ = 1;
		$maxX = 0;
		$maxY = 0;
		$maxZ = 0;

		$flag = $this->meta > 0;

		if(($this->meta & self::FLAG_WEST) > 0){
			$maxX = max($maxX, 0.0625);
			$minX = 0;
			$minY = 0;
			$maxY = 1;
			$minZ = 0;
			$maxZ = 1;
			$flag = true;
		}

		if(($this->meta & self::FLAG_EAST) > 0){
			$minX = min($minX, 0.9375);
			$maxX = 1;
			$minY = 0;
			$maxY = 1;
			$minZ = 0;
			$maxZ = 1;
			$flag = true;
		}

		if(($this->meta & self::FLAG_SOUTH) > 0){
			$minZ = min($minZ, 0.9375);
			$maxZ = 1;
			$minX = 0;
			$maxX = 1;
			$minY = 0;
			$maxY = 1;
			$flag = true;
		}

		//TODO: Missing NORTH check

		if(!$flag and $this->getSide(Facing::UP)->isSolid()){
			$minY = min($minY, 0.9375);
			$maxY = 1;
			$minX = 0;
			$maxX = 1;
			$minZ = 0;
			$maxZ = 1;
		}

		return new AxisAlignedBB($minX, $minY, $minZ, $maxX, $maxY, $maxZ);
	}

	public function place(Item $item, Block $blockReplace, Block $blockClicked, int $face, Vector3 $clickVector, Player $player = null) : bool{
		if(!$blockClicked->isSolid() or $face === Facing::UP or $face === Facing::DOWN){
			return false;
		}

		static $faces = [
			Facing::NORTH => self::FLAG_SOUTH,
			Facing::SOUTH => self::FLAG_NORTH,
			Facing::WEST => self::FLAG_EAST,
			Facing::EAST => self::FLAG_WEST
		];

		$this->meta = $faces[$face] ?? 0;
		if($blockReplace->getId() === $this->getId()){
			$this->meta |= $blockReplace->meta;
		}

		return parent::place($item, $blockReplace, $blockClicked, $face, $clickVector, $player);
	}

	public function onNearbyBlockChange() : void{
		static $sides = [
			self::FLAG_SOUTH => Facing::SOUTH,
			self::FLAG_WEST => Facing::WEST,
			self::FLAG_NORTH => Facing::NORTH,
			self::FLAG_EAST => Facing::EAST
		];

		$meta = $this->meta;

		foreach($sides as $flag => $side){
			if(($meta & $flag) === 0){
				continue;
			}

			if(!$this->getSide($side)->isSolid()){
				$meta &= ~$flag;
			}
		}

		if($meta !== $this->meta){
			if($meta === 0){
				$this->level->useBreakOn($this);
			}else{
				$this->meta = $meta;
				$this->level->setBlock($this, $this);
			}
		}
	}

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

	public function onRandomTick() : void{
		//TODO: vine growth
	}

	public function getVariantBitmask() : int{
		return 0;
	}

	public function getDrops(Item $item) : array{
		if($item->getBlockToolType() & BlockToolType::TYPE_SHEARS){
			return $this->getDropsForCompatibleTool($item);
		}

		return [];
	}

	public function getToolType() : int{
		return BlockToolType::TYPE_AXE;
	}

	public function getFlameEncouragement() : int{
		return 15;
	}

	public function getFlammability() : int{
		return 100;
	}
}