<?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/
 * 
 *
*/

namespace PocketMine\Level\Generator;
use PocketMine;

class Flat extends Generator{
	private $level, $random, $structure, $chunks, $options, $floorLevel, $preset, $populators = array();
	
	public function getSettings(){
		return $this->options;
	}
	
	public function getName(){
		return "flat";
	}
	
	public function __construct(array $options = array()){
		$this->preset = "2;7,59x1,3x3,2;1;spawn(radius=10 block=89),decoration(treecount=80 grasscount=45)";
		$this->options = $options;
		if(isset($options["preset"])){
			$this->parsePreset($options["preset"]);
		}else{
			$this->parsePreset($this->preset);
		}
		if(isset($this->options["decoration"])){
			$ores = new Populator\Ore();
			$ores->setOreTypes(array(
				new Object\Ore\Type(new Block\CoalOre(), 20, 16, 0, 128),
				new Object\Ore\Type(New Block\IronOre(), 20, 8, 0, 64),
				new Object\Ore\Type(new Block\RedstoneOre(), 8, 7, 0, 16),
				new Object\Ore\Type(new Block\LapisOre(), 1, 6, 0, 32),
				new Object\Ore\Type(new Block\GoldOre(), 2, 8, 0, 32),
				new Object\Ore\Type(new Block\DiamondOre(), 1, 7, 0, 16),
				new Object\Ore\Type(new Block\Dirt(), 20, 32, 0, 128),
				new Object\Ore\Type(new Block\Gravel(), 10, 16, 0, 128),
			));
			$this->populators[] = $ores;			
		}
		
		/*if(isset($this->options["mineshaft"])){
			$this->populators[] = new MineshaftPopulator(isset($this->options["mineshaft"]["chance"]) ? floatval($this->options["mineshaft"]["chance"]) : 0.01);
		}*/
	}
	
	public function parsePreset($preset){
		$this->preset = $preset;
		$preset = explode(";", $preset);
		$version = (int) $preset[0];
		$blocks = @$preset[1];
		$biome = isset($preset[2]) ? $preset[2]:1;
		$options = isset($preset[3]) ? $preset[3]:"";
		preg_match_all('#(([0-9]{0,})x?([0-9]{1,3}:?[0-9]{0,2})),?#', $blocks, $matches);
		$y = 0;
		$this->structure = array();
		$this->chunks = array();
		foreach($matches[3] as $i => $b){
			$b = BlockAPI::fromString($b);
			$cnt = $matches[2][$i] === "" ? 1:intval($matches[2][$i]);
			for($cY = $y, $y += $cnt; $cY < $y; ++$cY){
				$this->structure[$cY] = $b;
			}
		}
		
		$this->floorLevel = $y;
		
		for(;$y < 0xFF; ++$y){
			$this->structure[$y] = new Block\Special\Air();
		}
		
		
		for($Y = 0; $Y < 8; ++$Y){
			$this->chunks[$Y] = "";
			$startY = $Y << 4;
			$endY = $startY + 16;
			for($Z = 0; $Z < 16; ++$Z){
				for($X = 0; $X < 16; ++$X){
					$blocks = "";
					$metas = "";
					for($y = $startY; $y < $endY; ++$y){
						$blocks .= chr($this->structure[$y]->getID());
						$metas .= substr(dechex($this->structure[$y]->getMetadata()), -1);
					}
					$this->chunks[$Y] .= $blocks.hex2bin($metas)."\x00\x00\x00\x00\x00\x00\x00\x00";
				}
			}
		}
		
		preg_match_all('#(([0-9a-z_]{1,})\(?([0-9a-z_ =:]{0,})\)?),?#', $options, $matches);
		foreach($matches[2] as $i => $option){
			$params = true;
			if($matches[3][$i] !== ""){
				$params = array();
				$p = explode(" ", $matches[3][$i]);
				foreach($p as $k){
					$k = explode("=", $k);
					if(isset($k[1])){
						$params[$k[0]] = $k[1];
					}
				}
			}
			$this->options[$option] = $params;
		}
	}
	
	public function init(Level\Level $level, Utils\Random $random){
		$this->level = $level;
		$this->random = $random;
	}
		
	public function generateChunk($chunkX, $chunkZ){
		for($Y = 0; $Y < 8; ++$Y){
			$this->level->setMiniChunk($chunkX, $chunkZ, $Y, $this->chunks[$Y]);
		}
	}
	
	public function populateChunk($chunkX, $chunkZ){
		$this->random->setSeed(0xdeadbeef ^ ($chunkX << 8) ^ $chunkZ ^ $this->level->getSeed());
		foreach($this->populators as $populator){
			$populator->populate($this->level, $chunkX, $chunkZ, $this->random);
		}
	}
	
	public function getSpawn(){
		return new Math\Vector3(128, $this->floorLevel, 128);
	}
}

Generator::addGenerator(__NAMESPACE__ . "\\Flat", "flat");