<?php
/**
 *  ____             __     __                    ____                       
 * /\  _`\          /\ \__ /\ \__                /\  _`\                     
 * \ \ \L\ \     __ \ \ ,_\\ \ ,_\     __   _ __ \ \ \L\_\     __     ___    
 *  \ \  _ <'  /'__`\\ \ \/ \ \ \/   /'__`\/\`'__\\ \ \L_L   /'__`\ /' _ `\  
 *   \ \ \L\ \/\  __/ \ \ \_ \ \ \_ /\  __/\ \ \/  \ \ \/, \/\  __/ /\ \/\ \ 
 *    \ \____/\ \____\ \ \__\ \ \__\\ \____\\ \_\   \ \____/\ \____\\ \_\ \_\
 *     \/___/  \/____/  \/__/  \/__/ \/____/ \/_/    \/___/  \/____/ \/_/\/_/
 * Tomorrow's pocketmine generator.
 * @author Ad5001 <mail@ad5001.eu>, XenialDan <https://github.com/thebigsmileXD>
 * @link https://github.com/Ad5001/BetterGen
 * @category World Generator
 * @api 3.0.0
 * @version 1.1
 */

namespace Ad5001\BetterGen\populator;

use Ad5001\BetterGen\loot\LootTable;
use Ad5001\BetterGen\utils\BuildingUtils;
use pocketmine\block\Block;
use pocketmine\level\ChunkManager;
use pocketmine\math\Vector3;
use pocketmine\utils\Random;
use pocketmine\level\Level;

class MineshaftPopulator extends AmountPopulator {
	/** var int */
	protected $maxPath;
	/** @var ChunkManager */
	protected $level;
	const DIR_XPLUS = 0;
	const DIR_XMIN = 1;
	const DIR_ZPLUS = 2;
	const DIR_ZMIN = 3;
	const TYPE_FORWARD = 0;
	const TYPE_CROSSPATH = 1;
	const TYPE_STAIRS = 2;
	
	/**
	 * Populates the chunk
	 *
	 * @param ChunkManager $level
	 * @param int $chunkX
	 * @param int $chunkZ
	 * @param Random $random
	 * @return void
	 */
	public function populate(ChunkManager $level, $chunkX, $chunkZ, Random $random) {
		if ($this->getAmount($random) < 100)
			return;
		$this->level = $level;
		$x = $random->nextRange($chunkX << 4, ($chunkX << 4) + 15);
		$z = $random->nextRange($chunkZ << 4, ($chunkZ << 4) + 15);
		$y = $random->nextRange(5, 50);
		// First filling the large dirt place (center of the mineshaft)
		BuildingUtils::fill($level, new Vector3($x - 6, $y, $x - 6), new Vector3($x + 6, $y + 8, $z + 6), Block::get(Block::AIR));
		BuildingUtils::fill($level, new Vector3($x - 6, $y, $x - 6), new Vector3($x + 6, $y, $z + 6), Block::get(Block::DIRT));
		$startingPath = $random->nextBoundedInt(4);
		$this->maxPath = $random->nextBoundedInt(100) + 50;
		foreach(array_fill(0, $startingPath, 1) as $hey) {
			$dir = $random->nextBoundedInt(4);
			switch ($dir) {
				case self::DIR_XPLUS :
					$this->generateMineshaftPart($x + 6, $y + $random->nextBoundedInt(5), $z + $random->nextBoundedInt(12) - 6, $dir, $random);
					break;
				case self::DIR_XMIN :
					$this->generateMineshaftPart($x - 6, $y + $random->nextBoundedInt(5), $z + $random->nextBoundedInt(12) - 6, $dir, $random);
					break;
				case self::DIR_ZPLUS :
					$this->generateMineshaftPart($x + $random->nextBoundedInt(12) - 6, $y + $random->nextBoundedInt(8), $z + 6, $dir, $random);
					break;
				case self::DIR_ZMIN :
					$this->generateMineshaftPart($x + $random->nextBoundedInt(12) - 6, $y + $random->nextBoundedInt(8), $z - 6, $dir, $random);
					break;
			}
		}
	}

	/**
	 * Builds a mineshaft part and return applicable directions
	 * @param int $x
	 * @param int $y
	 * @param int $z
	 * @param int $dir
	 * @param Random $random
	 */
	public function generateMineshaftPart(int $x, int $y, int $z, int $dir, Random $random) {
		if ($this->maxPath -- < 1 || $y >= $this->getHighestBlockAt($x, $z) - 10)
			return;
		$type = $random->nextBoundedInt(3);
		$level = $this->level;
		switch ($type) {
			case self::TYPE_FORWARD :
				switch ($dir) {
					case self::DIR_XPLUS :
						// First, filling everything blank.
						BuildingUtils::fill($this->level, new Vector3($x, $y, $z - 1), new Vector3($x + 4, $y + 2, $z + 1), Block::get(Block::AIR));
						// Then, making sure the floor is solid.
						BuildingUtils::fillCallback(new Vector3($x, $y - 1, $z - 1), new Vector3($x + 4, $y - 1, $z + 1), function ($v3, ChunkManager $level) {
							if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
						}, $this->level);
						// Putting rails
						BuildingUtils::fillCallback(new Vector3($x, $y, $z), new Vector3($x + 4, $y, $z), function ($v3, ChunkManager $level, Random $random) {
							if ($random->nextBoundedInt(3) !== 0) {
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::RAIL);
								$level->setBlockDataAt($v3->x, $v3->y, $v3->z, 1);
							}
						}, $this->level, $random);
						// After this, building the floor maintainer (the wood structure)
						$level->setBlockIdAt($x, $y, $z - 1, Block::FENCE);
						$level->setBlockIdAt($x, $y, $z + 1, Block::FENCE);
						$level->setBlockIdAt($x, $y + 1, $z - 1, Block::FENCE);
						$level->setBlockIdAt($x, $y + 1, $z + 1, Block::FENCE);
						$level->setBlockIdAt($x, $y + 2, $z - 1, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z + 1, Block::PLANK);
						$level->setBlockIdAt($x + 1, $y + 2, $z, Block::TORCH);
						$level->setBlockDataAt($x + 1, $y + 2, $z, 2);
						// Generating chest
						if ($random->nextBoundedInt(30) == 0) {
							$direction =(int) $random->nextBoolean ();
							if ($direction == 0)
								$direction = -1; // Choosing the part of the rail.
							$direction2 =(int) $random->nextBoolean ();
							if ($direction2 == 0)
								$direction2 = 2;
							if ($direction2 == 1)
								$direction2 = 4;
							LootTable::buildLootTable(new Vector3($x + $direction2, $y, $z + $direction), LootTable::LOOT_MINESHAFT, $random);
						}
						if ($random->nextBoundedInt(30) !== 0)
							$this->generateMineshaftPart($x + 5, $y, $z, $dir, $random);
						break;
					case self::DIR_XMIN :
						// First, filling everything blank.
						BuildingUtils::fill($this->level, new Vector3($x, $y, $z - 1), new Vector3($x - 4, $y + 2, $z + 1));
						// Then, making sure the floor is solid.
						BuildingUtils::fillCallback(new Vector3($x, $y - 1, $z - 1), new Vector3($x - 4, $y - 1, $z + 1), function ($v3, ChunkManager $level) {
							
							if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
						}, $this->level);
						// Putting rails
						BuildingUtils::fillCallback(new Vector3($x, $y, $z), new Vector3($x - 4, $y, $z), function ($v3, ChunkManager $level, Random $random) {
							if ($random->nextBoundedInt(3) !== 0) {
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::RAIL);
								$level->setBlockDataAt($v3->x, $v3->y, $v3->z, 1);
							}
						}, $this->level, $random);
						// After this, building the floor maintainer (the wood structure)
						$level->setBlockIdAt($x, $y, $z - 1, Block::FENCE);
						$level->setBlockIdAt($x, $y, $z + 1, Block::FENCE);
						$level->setBlockIdAt($x, $y + 1, $z - 1, Block::FENCE);
						$level->setBlockIdAt($x, $y + 1, $z + 1, Block::FENCE);
						$level->setBlockIdAt($x, $y + 2, $z - 1, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z + 1, Block::PLANK);
						$level->setBlockIdAt($x - 1, $y + 2, $z, Block::TORCH);
						$level->setBlockDataAt($x - 1, $y + 2, $z, 1);
						// Generating chest
						if ($random->nextBoundedInt(30) == 0) {
							$direction =(int) $random->nextBoolean ();
							if ($direction == 0)
								$direction = -1; // Choosing the part of the rail.
							$direction2 =(int) $random->nextBoolean ();
							if ($direction2 == 0)
								$direction2 = 2;
							if ($direction2 == 1)
								$direction2 = 4;
							LootTable::buildLootTable(new Vector3($x - $direction2, $y, $z + $direction), LootTable::LOOT_MINESHAFT, $random);
						}
						if ($random->nextBoundedInt(30) !== 0)
							$this->generateMineshaftPart($x - 5, $y, $z, $dir, $random);
						break;
					case self::DIR_ZPLUS :
						// First, filling everything blank.
						BuildingUtils::fill($this->level, new Vector3($x - 1, $y, $z), new Vector3($x + 1, $y + 2, $z + 4));
						// Then, making sure the floor is solid.
						BuildingUtils::fillCallback(new Vector3($x - 1, $y - 1, $z), new Vector3($x + 1, $y - 1, $z + 4), function ($v3, ChunkManager $level) {
							
							if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
						}, $this->level);
						// Putting rails
						BuildingUtils::fillCallback(new Vector3($x, $y, $z), new Vector3($x, $y, $z + 4), function ($v3, ChunkManager $level, Random $random) {
							if ($random->nextBoundedInt(3) !== 0) {
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::RAIL);
								$level->setBlockDataAt($v3->x, $v3->y, $v3->z, 0);
							}
						}, $this->level, $random);
						// After this, building the floor maintainer (the wood structure)
						$level->setBlockIdAt($x - 1, $y, $z, Block::FENCE);
						$level->setBlockIdAt($x + 1, $y, $z, Block::FENCE);
						$level->setBlockIdAt($x - 1, $y + 1, $z, Block::FENCE);
						$level->setBlockIdAt($x + 1, $y + 1, $z, Block::FENCE);
						$level->setBlockIdAt($x - 1, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x + 1, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z - 1, Block::TORCH);
						$level->setBlockDataAt($x, $y + 2, $z - 1, 4);
						// Generating chest
						if ($random->nextBoundedInt(30) == 0) {
							$direction =(int) $random->nextBoolean ();
							if ($direction == 0)
								$direction = -1; // Choosing the part of the rail.
							$direction2 =(int) $random->nextBoolean ();
							if ($direction2 == 0)
								$direction2 = 2;
							if ($direction2 == 1)
								$direction2 = 4;
							LootTable::buildLootTable(new Vector3($x + $direction, $y, $z + $direction2), LootTable::LOOT_MINESHAFT, $random);
						}
						if ($random->nextBoundedInt(30) !== 0)
							$this->generateMineshaftPart($x, $y, $z + 5, $dir, $random);
						break;
					case self::DIR_ZMIN :
						// First, filling everything blank.
						BuildingUtils::fill($this->level, new Vector3($x - 1, $y, $z), new Vector3($x + 1, $y + 2, $z - 4));
						// Then, making sure the floor is solid.
						BuildingUtils::fillCallback(new Vector3($x - 1, $y - 1, $z), new Vector3($x + 1, $y - 1, $z - 4), function ($v3, ChunkManager $level) {
							
							if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
						}, $this->level);
						// Putting rails
						BuildingUtils::fillCallback(new Vector3($x, $y, $z), new Vector3($x, $y, $z - 4), function ($v3, ChunkManager $level, Random $random) {
							if ($random->nextBoundedInt(3) !== 0) {
								$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::RAIL);
								$level->setBlockDataAt($v3->x, $v3->y, $v3->z, 0);
							}
						}, $this->level, $random);
						// After this, building the floor maintainer (the wood structure)
						$level->setBlockIdAt($x - 1, $y, $z, Block::FENCE);
						$level->setBlockIdAt($x + 1, $y, $z, Block::FENCE);
						$level->setBlockIdAt($x - 1, $y + 1, $z, Block::FENCE);
						$level->setBlockIdAt($x + 1, $y + 1, $z, Block::FENCE);
						$level->setBlockIdAt($x - 1, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x + 1, $y + 2, $z, Block::PLANK);
						$level->setBlockIdAt($x, $y + 2, $z - 1, Block::TORCH);
						$level->setBlockDataAt($x, $y + 2, $z - 1, 3);
						// Generating chest
						if ($random->nextBoundedInt(30) == 0) {
							$direction =(int) $random->nextBoolean ();
							if ($direction == 0)
								$direction = -1; // Choosing the part of the rail.
							$direction2 =(int) $random->nextBoolean ();
							if ($direction2 == 0)
								$direction2 = 2;
							if ($direction2 == 1)
								$direction2 = 4;
							LootTable::buildLootTable(new Vector3($x + $direction, $y, $z - $direction2), LootTable::LOOT_MINESHAFT, $random);
						}
						if ($random->nextBoundedInt(30) !== 0)
							$this->generateMineshaftPart($x, $y, $z - 5, $dir, $random);
						break;
				}
				// Doing cobwebs
				$webNum = $random->nextBoundedInt(5) + 2;
				for($i = 0; $i < $webNum; $i ++) {
					$xx = $x + $random->nextBoundedInt(5) - 2;
					$yy = $y + $random->nextBoundedInt(3);
					$zz = $z + $random->nextBoundedInt(5) - 2;
					if ($level->getBlockIdAt($xx, $yy, $zz) == Block::AIR)
						$level->setBlockIdAt($xx, $yy, $zz, Block::COBWEB);
				}
				break;
			case self::TYPE_CROSSPATH :
				$possiblePathes = [ 
						self::DIR_XPLUS,
						self::DIR_XMIN,
						self::DIR_ZPLUS,
						self::DIR_ZMIN 
				];
				switch ($dir) {
					case self::DIR_XPLUS :
						$x ++;
						unset($possiblePathes[0]);
						break;
					case self::DIR_XMIN :
						$x --;
						unset($possiblePathes[1]);
						break;
					case self::DIR_ZPLUS :
						$z ++;
						unset($possiblePathes[2]);
						break;
					case self::DIR_ZMIN :
						$z --;
						unset($possiblePathes[3]);
						break;
				}
				
				// Then, making sure the floor is solid.
				BuildingUtils::fillCallback(new Vector3($x + 1, $y - 1, $z - 1), new Vector3($x - 1, $y - 1, $z + 1), function ($v3, ChunkManager $level) {
					
					if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
						$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
				}, $this->level);
				// Putting rails
				
				BuildingUtils::fill($this->level, new Vector3($x - 1, $y, $z - 1), new Vector3($x + 1, $y + 6, $z + 1), Block::get(Block::AIR));
				
				BuildingUtils::corners($this->level, new Vector3($x - 1, $y, $z - 1), new Vector3($x + 1, $y + 6, $z + 1), Block::get(Block::PLANK));
				
				$newFloor = $random->nextBoolean ();
				$numberFloor = $random->nextBoundedInt(4 + ($newFloor ? 5 : 0));
				$possiblePathes = [ 
						$possiblePathes,
						($newFloor ?[ 
								self::DIR_XPLUS,
								self::DIR_XMIN,
								self::DIR_ZPLUS,
								self::DIR_ZMIN 
						] : [ ]) 
				];
				for($i = 7; $i > $newFloor; $i --) {
					$chooseNew =(int) $newFloor && $random->nextBoolean ();
					$choose = $random->nextBoundedInt(4);
					unset($possiblePathes[$chooseNew] [$choose]);
				}
				// Building pathes
				foreach($possiblePathes[0] as $path) {
					switch ($path) {
						case self::DIR_XPLUS :
							$this->generateMineshaftPart($x + 2, $y, $z, self::DIR_XPLUS, $random);
							break;
						case self::DIR_XMIN :
							$this->generateMineshaftPart($x - 2, $y, $z, self::DIR_XMIN, $random);
							break;
						case self::DIR_ZPLUS :
							$this->generateMineshaftPart($x, $y, $z + 2, self::DIR_ZPLUS, $random);
							break;
						case self::DIR_ZMIN :
							$this->generateMineshaftPart($x, $y, $z - 2, self::DIR_ZMIN, $random);
							break;
					}
				}
				foreach($possiblePathes[1] as $path) {
					switch ($path) {
						case self::DIR_XPLUS :
							$this->generateMineshaftPart($x + 2, $y + 4, $z, self::DIR_XPLUS, $random);
							break;
						case self::DIR_XMIN :
							$this->generateMineshaftPart($x - 2, $y + 4, $z, self::DIR_XMIN, $random);
							break;
						case self::DIR_ZPLUS :
							$this->generateMineshaftPart($x, $y + 4, $z + 2, self::DIR_ZPLUS, $random);
							break;
						case self::DIR_ZMIN :
							$this->generateMineshaftPart($x, $y + 4, $z - 2, self::DIR_ZMIN, $random);
							break;
					}
				}
				
				// Doing cobwebs
				$webNum = $random->nextBoundedInt(5) + 2;
				for($i = 0; $i < $webNum; $i ++) {
					$xx = $x + $random->nextBoundedInt(3) - 1;
					$yy = $y + $random->nextBoundedInt(6);
					$zz = $z + $random->nextBoundedInt(3) - 1;
					if ($level->getBlockIdAt($xx, $yy, $zz) == Block::AIR)
						$level->setBlockIdAt($xx, $yy, $zz, Block::COBWEB);
				}
				break;
			case self::TYPE_STAIRS :
				if($y <= 5) {
					$this->generateMineshaftPart($x, $y, $z, $dir, $random);
					return;
				}
				// Building stairs
				for($i = 0; $i < 4; $i ++) {
					switch ($i) {
						case self::DIR_XPLUS :
							BuildingUtils::fill($this->level, new Vector3($x + $i, $y - $i - 1, $z - 2), new Vector3($x + $i, $y - $i + 3, $z + 2), Block::get(Block::AIR));
							BuildingUtils::fillCallback(new Vector3($x + $i, $y - $i - 2, $z - 2), new Vector3($x + $i, $y - $i - 2, $z + 2), function ($v3, ChunkManager $level) {
								if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
									$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
							}, $this->level);
							break;
						case self::DIR_XMIN :
							BuildingUtils::fill($this->level, new Vector3($x - $i, $y - $i - 1, $z - 2), new Vector3($x - $i, $y - $i + 3, $z + 2), Block::get(Block::AIR));
							BuildingUtils::fillCallback(new Vector3($x - $i, $y - $i - 2, $z - 2), new Vector3($x - $i, $y - $i - 2, $z + 2), function ($v3, ChunkManager $level) {
								
								if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
									$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
							}, $this->level);
							break;
						case self::DIR_ZPLUS :
							BuildingUtils::fill($this->level, new Vector3($x - 2, $y - $i - 1, $z + $i), new Vector3($x + 2, $y - $i + 3, $z + $i), Block::get(Block::AIR));
							BuildingUtils::fillCallback(new Vector3($x - 2, $y - $i - 2, $z + $i), new Vector3($x + 2, $y - $i - 2, $z + $i), function ($v3, ChunkManager $level) {
								
								if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
									$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
							}, $this->level);
							break;
						case self::DIR_ZMIN :
							BuildingUtils::fill($this->level, new Vector3($x - 2, $y - $i - 1, $z - $i), new Vector3($x + 2, $y - $i + 3, $z - $i), Block::get(Block::AIR));
							BuildingUtils::fillCallback(new Vector3($x - 2, $y - $i - 2, $z - $i), new Vector3($x + 2, $y - $i - 2, $z - $i), function ($v3, ChunkManager $level) {
								
								if ($level->getBlockIdAt($v3->x, $v3->y, $v3->z) == Block::AIR)
									$level->setBlockIdAt($v3->x, $v3->y, $v3->z, Block::PLANK);
							}, $this->level);
							break;
					}
				}
				
				// Next one
				switch ($i) {
					case self::DIR_XPLUS :
						$this->generateMineshaftPart($x + 4, $y - 4, $z, self::DIR_XPLUS, $random);
						break;
					case self::DIR_XMIN :
						$this->generateMineshaftPart($x - 4, $y - 4, $z, self::DIR_XMIN, $random);
						break;
					case self::DIR_ZPLUS :
						$this->generateMineshaftPart($x, $y - 4, $z + 4, self::DIR_ZPLUS, $random);
						break;
					case self::DIR_ZMIN :
						$this->generateMineshaftPart($x, $y - 4, $z - 4, self::DIR_ZMIN, $random);
						break;
				}
				break;
		}
	}
	
	/**
	 * Gets the top block (y) on an x and z axes
	 * @param int $x
	 * @param int $z
	 */
	protected function getHighestWorkableBlock($x, $z) {
		for($y = Level::Y_MAX - 1; $y > 0; -- $y) {
			$b = $this->level->getBlockIdAt($x, $y, $z);
			if ($b === Block::SAND) {
				break;
			}
		}
		
		return ++$y;
	}
}
?>