<?php

namespace ManiaControl\ManiaExchange;

use ManiaControl\Files\FileUtil;
use ManiaControl\ManiaControl;
use ManiaControl\Maps\Map;
use ManiaControl\Maps\MapManager;

/**
 * Mania Exchange Info Searcher Class
 *
 * @author steeffeen & kremsy
 */
class ManiaExchangeManager {
	/**
	 * Constants
	 */
	//Search others
	const SEARCH_ORDER_NONE               = -1;
	const SEARCH_ORDER_TRACK_NAME         = 0;
	const SEARCH_ORDER_AUTHOR             = 1;
	const SEARCH_ORDER_UPLOADED_NEWEST    = 2;
	const SEARCH_ORDER_UPLOADED_OLDEST    = 3;
	const SEARCH_ORDER_UPDATED_NEWEST     = 4;
	const SEARCH_ORDER_UPDATED_OLDEST     = 5;
	const SEARCH_ORDER_ACTIVITY_LATEST    = 6;
	const SEARCH_ORDER_ACTIVITY_OLDEST    = 7;
	const SEARCH_ORDER_AWARDS_MOST        = 8;
	const SEARCH_ORDER_AWARDS_LEAST       = 9;
	const SEARCH_ORDER_COMMENTS_MOST      = 10;
	const SEARCH_ORDER_COMMENTS_LEAST     = 11;
	const SEARCH_ORDER_DIFFICULTY_EASIEST = 12;
	const SEARCH_ORDER_DIFFICULTY_HARDEST = 13;
	const SEARCH_ORDER_LENGHT_SHORTEST    = 14;
	const SEARCH_ORDER_LENGHT_LONGEST     = 15;

	//Maximum Maps per request
	const MAPS_PER_MX_FETCH = 50;

	/**
	 * Private Propertieswc
	 */
	private $maniaControl = null;
	private $mxIdUidVector = array();

	/**
	 * Construct map manager
	 *
	 * @param \ManiaControl\ManiaControl $maniaControl
	 */
	public function __construct(ManiaControl $maniaControl) {
		$this->maniaControl = $maniaControl;
	}


	/**
	 * Store Map Info from MX and store the mxid in the database and the mx info in the map object
	 *
	 * @param $mxMapInfos
	 */
	public function updateMapObjectsWithManiaExchangeIds($mxMapInfos) {
		$mysqli = $this->maniaControl->database->mysqli;
		// Save map data
		$saveMapQuery     = "UPDATE `" . MapManager::TABLE_MAPS . "`
				SET `mxid` = ?
				WHERE `uid` = ?;";
		$saveMapStatement = $mysqli->prepare($saveMapQuery);
		if ($mysqli->error) {
			trigger_error($mysqli->error);
			return;
		}
		foreach($mxMapInfos as $mxMapInfo) {
			/** @var MXMapInfo $mxMapInfo */
			$saveMapStatement->bind_param('is', $mxMapInfo->id, $mxMapInfo->uid);
			$saveMapStatement->execute();
			if ($saveMapStatement->error) {
				trigger_error($saveMapStatement->error);
			}

			//Take the uid out of the vektor
			if (isset($this->mxIdUidVector[$mxMapInfo->id])) {
				$uid = $this->mxIdUidVector[$mxMapInfo->id];
			} else {
				$uid = $mxMapInfo->uid;
			}
			$map = $this->maniaControl->mapManager->getMapByUid($uid);

			/** @var Map $map */
			$map->mx = $mxMapInfo;
		}
		$saveMapStatement->close();
	}

	/**
	 * Unset Map by Mx Id
	 *
	 * @param $mxId
	 */
	public function unsetMap($mxId) {
		unset($this->mxIdUidVector[$mxId]);
	}

	/**
	 * Fetch Map Information from Mania Exchange
	 *
	 * @param null $map
	 */
	public function fetchManiaExchangeMapInformations($map = null) {
		if (!$map) {
			//Fetch Informations for whole Maplist
			$maps = $this->maniaControl->mapManager->getMaps();
		} else {
			//Fetch Information for a single map
			$maps[] = $map;
		}

		$mysqli      = $this->maniaControl->database->mysqli;
		$mapIdString = '';

		// Fetch mx ids
		$fetchMapQuery     = "SELECT `mxid`, `changed`  FROM `" . MapManager::TABLE_MAPS . "`
				WHERE `index` = ?;";
		$fetchMapStatement = $mysqli->prepare($fetchMapQuery);
		if ($mysqli->error) {
			trigger_error($mysqli->error);
			return;
		}

		$id = 0;
		foreach($maps as $map) {
			/** @var Map $map */
			$fetchMapStatement->bind_param('i', $map->index);
			$fetchMapStatement->execute();
			if ($fetchMapStatement->error) {
				trigger_error($fetchMapStatement->error);
				continue;
			}
			$fetchMapStatement->store_result();
			$fetchMapStatement->bind_result($mxId, $changed);
			$fetchMapStatement->fetch();
			$fetchMapStatement->free_result();

			//Set changed time into the map object
			$map->lastUpdate = strtotime($changed);

			if ($mxId != 0) {
				$appendString = $mxId . ',';
				//Set the mx id to the mxidmapvektor
				$this->mxIdUidVector[$mxId] = $map->uid;
			} else {
				$appendString = $map->uid . ',';
			}

			$id++;

			//If Max Maplimit is reached, or string gets too long send the request
			if ($id % self::MAPS_PER_MX_FETCH == 0) {
				$mapIdString = substr($mapIdString, 0, -1);
				$this->getMaplistByMixedUidIdString($mapIdString);
				$mapIdString = '';
			}

			$mapIdString .= $appendString;
		}

		if ($mapIdString != '') {
			$mapIdString = substr($mapIdString, 0, -1);
			$this->getMaplistByMixedUidIdString($mapIdString);
		}

		$fetchMapStatement->close();
	}


	/**
	 * Get the Whole Maplist from MX by Mixed Uid and Id String fetch
	 *
	 * @param $string
	 * @return array|null
	 */
	public function getMaplistByMixedUidIdString($string) {
		// Get Title Id
		$titleId     = $this->maniaControl->server->titleId;
		$titlePrefix = strtolower(substr($titleId, 0, 2));

		// compile search URL
		$url = 'http://api.mania-exchange.com/' . $titlePrefix . '/maps/?ids=' . $string;

		try { //FIXME exceptions get not caught here?
			$success = $this->maniaControl->fileReader->loadFile($url, function ($mapInfo) {

				// Get Title Id
				$titleId     = $this->maniaControl->server->titleId;
				$titlePrefix = strtolower(substr($titleId, 0, 2));

				$mxMapList = json_decode($mapInfo);
				if ($mxMapList === null) {
					trigger_error('Cannot decode searched JSON data');
					return null;
				}

				$maps = array();
				foreach($mxMapList as $map) {
					if (!empty($map)) {
						array_push($maps, new MXMapInfo($titlePrefix, $map));
					}
				}

				$this->updateMapObjectsWithManiaExchangeIds($maps);
				return true;
			}, "application/json");
		} catch(\Exception $e) {
			$this->maniaControl->log("Error while fetching Map Infos" . $e->getTraceAsString());
			return false;
		}

		return $success;
	}

	/**
	 * Gets a Maplist from Mania Exchange
	 *
	 * @param string $name
	 * @param string $author
	 * @param string $env
	 * @param int    $maxMapsReturned
	 * @param int    $searchOrder
	 * @return array null
	 */
	public function getMaps($name = '', $author = '', $env = '', $maxMapsReturned = 100, $searchOrder = self::SEARCH_ORDER_UPDATED_NEWEST) {
		// Get Title Id
		$titleId     = $this->maniaControl->server->titleId;
		$titlePrefix = strtolower(substr($titleId, 0, 2));

		// Get MapTypes
		$scriptInfos = $this->maniaControl->client->getModeScriptInfo();

		$mapTypes = $scriptInfos->compatibleMapTypes;

		// compile search URL
		$url = 'http://' . $titlePrefix . '.mania-exchange.com/tracksearch?api=on';

		if ($env != '') {
			$url .= '&environments=' . $this->getEnvironment($env);
		}
		if ($name != '') {
			$url .= '&trackname=' . str_replace(" ", "%20", $name);
		}
		if ($author != '') {
			$url .= '&author=' . $author;
		}

		$url .= '&priord=' . $searchOrder;
		$url .= '&limit=' . $maxMapsReturned;
		$url .= '&mtype=' . $mapTypes;

		$mapInfo = FileUtil::loadFile($url, "application/json");

		if ($mapInfo === false) {
			$this->error = 'Connection or response error on ' . $url;
			return array();
		} elseif ($mapInfo === -1) {
			$this->error = 'Timed out while reading data from ' . $url;
			return array();
		} elseif ($mapInfo == '') {
			if (empty($maps)) {
				$this->error = 'No data returned from ' . $url;
				return array();
			}
		}

		$mxMapList = json_decode($mapInfo);
		if ($mxMapList === null) {
			trigger_error('Cannot decode searched JSON data from ' . $url);
			return null;
		}

		$maps = array();
		foreach($mxMapList as $map) {
			if (!empty($map)) {
				array_push($maps, new MXMapInfo($titlePrefix, $map));
			}
		}
		return $maps;
	}

	/**
	 * Gets the Current Environemnt by String
	 *
	 * @param $env
	 * @return int
	 */
	private function getEnvironment($env) {
		switch($env) {
			case 'TMCanyon':
			case 'SMStorm':
				return 1;
			case 'TMStadium':
				return 2;
			case 'TMValley':
				return 3;
			default:
				return -1;
		}
	}
}