<?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\item\TieredTool;
use pocketmine\math\AxisAlignedBB;
use pocketmine\math\Vector3;

class CobblestoneWall extends Transparent{
	public const NONE_MOSSY_WALL = 0;
	public const MOSSY_WALL = 1;

	protected $id = self::COBBLESTONE_WALL;

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

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

	public function getToolHarvestLevel() : int{
		return TieredTool::TIER_WOODEN;
	}

	public function getHardness() : float{
		return 2;
	}

	public function getName() : string{
		if($this->meta === 0x01){
			return "Mossy Cobblestone Wall";
		}

		return "Cobblestone Wall";
	}

	protected function recalculateBoundingBox() : ?AxisAlignedBB{
		//walls don't have any special collision boxes like fences do

		$north = $this->canConnect($this->getSide(Vector3::SIDE_NORTH));
		$south = $this->canConnect($this->getSide(Vector3::SIDE_SOUTH));
		$west = $this->canConnect($this->getSide(Vector3::SIDE_WEST));
		$east = $this->canConnect($this->getSide(Vector3::SIDE_EAST));

		$inset = 0.25;
		if(
			$this->getSide(Vector3::SIDE_UP)->getId() === Block::AIR and //if there is a block on top, it stays as a post
			(
				($north and $south and !$west and !$east) or
				(!$north and !$south and $west and $east)
			)
		){
			//If connected to two sides on the same axis but not any others, AND there is not a block on top, there is no post and the wall is thinner
			$inset = 0.3125;
		}

		return new AxisAlignedBB(
			$this->x + ($west ? 0 : $inset),
			$this->y,
			$this->z + ($north ? 0 : $inset),
			$this->x + 1 - ($east ? 0 : $inset),
			$this->y + 1.5,
			$this->z + 1 - ($south ? 0 : $inset)
		);
	}

	public function canConnect(Block $block){
		return $block instanceof static or $block instanceof FenceGate or ($block->isSolid() and !$block->isTransparent());
	}

}