<?php
// Datenbank-Verbindungsparameter
require_once ('dbutils.php');
require_once ('queuecontent.php');
require_once ('commonutils.php');
require_once ('utilities/userrights.php');

class Reports {
	var $dbutils;
	var $queue;
	var $commonUtils;
	var $userrights;
	
	static $sql_service_good = "";
	static $sql_service_ok = "";
	static $sql_service_bad = "";
	static $sql_kitchen_good = "";
	static $sql_kitchen_ok = "";
	static $sql_kitchen_bad = "";
	static $sql_ratings = "";
	static $sql_remarks = "";
	
	function __construct() {
		$this->dbutils = new DbUtils();
		$this->queue = new QueueContent();
		$this->commonUtils = new CommonUtils();
		$this->userrights = new Userrights();
	}
	
	public function createSqlPhrases() {
		self::$sql_service_good = "select COUNT(service) as count FROM %ratings% WHERE service='1' AND date between ? AND ?";
		self::$sql_service_ok = "select COUNT(service) as count FROM %ratings% WHERE service='2' AND date between ? AND ?";
		self::$sql_service_bad = "select COUNT(service) as count FROM %ratings% WHERE service='3' AND date between ? AND ?";
		
		self::$sql_kitchen_good = "select COUNT(kitchen) as count FROM %ratings% WHERE kitchen='1' AND date between ? AND ?";
		self::$sql_kitchen_ok = "select COUNT(kitchen) as count FROM %ratings% WHERE kitchen='2' AND date between ? AND ?";
		self::$sql_kitchen_bad = "select COUNT(kitchen) as count FROM %ratings% WHERE kitchen='3' AND date between ? AND ?";
		
		self::$sql_ratings = "select COUNT(id) as count FROM %ratings% WHERE date between ? AND ?";
		
		self::$sql_remarks = "SELECT DATE_FORMAT(date, '%e.%m.%Y %H:%i') AS date,remark FROM %ratings% WHERE CHAR_LENGTH(remark) > 2 AND date between ? AND ?";
	}
	
	function handleCommand($command) {
		header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
		header("Cache-Control: post-check=0, pre-check=0", false);
		header("Pragma: no-cache");
		
		// canUserCallCommands($currentCmd, $cmdArray,$right)
		$cmdArray = array('getStats');
		if (in_array($command, $cmdArray)) {
			if (!($this->userrights->hasCurrentUserRight('right_statistics'))) {
				echo "Benutzerrechte nicht ausreichend!";
				return false;
			}
		}
		
		$this->createSqlPhrases();
		$allDates = self::getDates();
		$pdo = DbUtils::openDbAndReturnPdoStatic();

		switch($command) {
			case 'getStats':
				$this->getStats($pdo);
				break;
			case 'getUsersums':
				$values = $this->getUsersums($pdo);
				echo json_encode(array("status" => "OK","msg" => $values));
				break;
			case 'getToday':
				$values = $this->iterateForHours($pdo, $allDates['todayDate'], intval($allDates['todayHour'])+1,false);
				echo json_encode(array("status" => "OK","msg" => $values));
				break;
			case 'getYesterday':
				$values = $this->iterateForHours($pdo, $allDates['yesterdayDate'], 24,true);
				echo json_encode(array("status" => "OK","msg" => $values));
				break;
			case 'getThismonth':
				$values = $this->iterateForDays($pdo, $allDates['monthAndYearOfThisMonth'],intval($allDates['currentDay']),true);
				echo json_encode(array("status" => "OK","msg" => $values));
				break;
			case 'getLastmonth':
				$values = $this->iterateForDays($pdo, $allDates['monthAndYearOfLastMonth'],intval($allDates['lastDayOfLastMonth']),true);
				echo json_encode(array("status" => "OK","msg" => $values));
				break;
			case 'getProds':
				$values = $this->sumSortedByProducts($pdo, $allDates['last30days'][0], $allDates['currentTimeStr']);
				echo json_encode(array("status" => "OK","msg" => $values));
				break;
			case 'getRatings':
				$values = $this->getRatings($pdo,$allDates['last30days'],$allDates['lastMonthComplete'], $allDates['currentTimeStr']);
				echo json_encode(array("status" => "OK","msg" => $values));
				break;
			case 'getMonthNames':
				echo json_encode(array("status" => "OK","thismonth" => $allDates['thisMonthName'],"lastmonth" => $allDates['lastMonthName']));
				break;
			default:
				echo "Command not supported.";
		}
	}
	
	private function getStats($pdo = null) {
		if (is_null($pdo)) {
			$pdo = DbUtils::openDbAndReturnPdoStatic();
		}
		$this->createSqlPhrases();
		
		$alldates = self::getDates();
		
		$this->getReports($pdo,$alldates);
	}
	
	public function getStatsCore($pdo,$forDash = false) {
		$this->createSqlPhrases();
		$alldates = self::getDates();
		return($this->getReportsCore($pdo,$alldates,$forDash));
	}
	
	static private function getDates() {
		date_default_timezone_set(DbUtils::getTimeZone());
		$currentTimeStr = date('Y-m-d H:i:s');
		$curTime = strtotime($currentTimeStr);
		
		$todayDate = date('Y-m-d');
		$todayHour = date('H');
		$yesterdayDate = date("Y-m-d", strtotime("-1 day", $curTime));
		
		// now for this month
		$firstDayOfThisMonth = date("Y-m-01", strtotime($currentTimeStr));
		$currentDay = date("d",strtotime($currentTimeStr));  // current day (4 if date is 4 Jan 2014)
		$month = date("m",strtotime($currentTimeStr));
		$monthName = self::getMonthName($month);
		$monthAndYearOfThisMonth = date("Y-m",strtotime($currentTimeStr));
		$thisMonthName = self::getMonthName($month);
		
		// last month
		$last_month_ini = new DateTime("first day of last month");
		$last_month_end = new DateTime("last day of last month");
		$firstDayOfLastMonth = $last_month_ini->format('Y-m-d');
		$lastDayOfLastMonth = $last_month_end-> format('d');
		$iterations = intval($last_month_end->format('d'));
		$lastMonth = intval($last_month_ini->format('m'));
		$monthAndYearOfLastMonth = $last_month_end->format('Y-m');
		$lastMonthComplete = $last_month_ini->format('Y-m-d') . " 00:00:00";
		$lastMonthName = self::getMonthName($lastMonth);
		
		// last 30 days
		$daysArr = array();
		for ($i=29;$i>=0;$i--) {
			$daysArr[] = date("Y-m-d", strtotime('-' . $i . ' day') );
		}
		
		$retArray = array(
				"todayDate" => $todayDate,
				"todayHour" => $todayHour,
				"currentTimeStr" => $currentTimeStr,
				"yesterdayDate" => $yesterdayDate,
				"monthAndYearOfLastMonth" => $monthAndYearOfLastMonth,
				"lastDayOfLastMonth" => $lastDayOfLastMonth,
				"lastMonthComplete" => $lastMonthComplete,
				"lastMonthName" => $lastMonthName,
				"currentDay" => $currentDay,
				"monthAndYearOfThisMonth" => $monthAndYearOfThisMonth,
				"thisMonthName" => $thisMonthName,
				"last30days" => $daysArr
		);
		return $retArray;
	}
	
	public static function getMonthName($monthNo) {
		$mons = array(
				1 => "Januar",
				2 => "Februar",
				3 => "März",
				4 => "April",
				5 => "Mai",
				6 => "Juni",
				7 => "Juli",
				8 => "August",
				9 => "September",
				10 => "Oktober",
				11 => "November",
				12 => "Dezember");
	
		return ($mons[intval($monthNo)]);
	}
	
	private function getReports ($pdo,$allDates) {
		$reports = $this->getReportsCore($pdo,$allDates);
		echo json_encode($reports);
	}
	
	private function getReportsCore($pdo,$allDates,$forDash = false) {
		$pdo->beginTransaction();
		
		// bills of today independently of closing
		$retArrayToday = $this->iterateForHours($pdo, $allDates['todayDate'], intval($allDates['todayHour'])+1,false);
		// closed yesterday bills:
		$retArrayYesterday = $this->iterateForHours($pdo, $allDates['yesterdayDate'], 24,true);
		
		$retThisMonth = $this->iterateForDays($pdo, $allDates['monthAndYearOfThisMonth'],intval($allDates['currentDay']),true);
		
		// closed of last month:
		$retArrayLastMonth = $this->iterateForDays($pdo, $allDates['monthAndYearOfLastMonth'],intval($allDates['lastDayOfLastMonth']),true);
		
		// products in the last 30 days:
		$retArrayProds = $this->sumSortedByProducts($pdo, $allDates['last30days'][0], $allDates['currentTimeStr']);
		
		$retRatings = $this->getRatings($pdo,$allDates['last30days'],$allDates['lastMonthComplete'], $allDates['currentTimeStr']);
		
		$usersums = $this->getUserSums($pdo);
		
		$pdo->commit();
		
		$retArray = array("today" => $retArrayToday, 
				"yesterday" => $retArrayYesterday,
				"thismonth" => $retThisMonth,
				"lastmonth" => $retArrayLastMonth,
				"prodsums" => $retArrayProds,
				"lastmonthname" => $allDates['lastMonthName'],
				"thismonthname" => $allDates['thisMonthName'],
				"ratings" => $retRatings,
				"usersums" => $usersums
		);
		
		if ($forDash) {
			$retArray["tables"] = self::getOpenTables($pdo);
			$retArray["prodscount"]  = self::getMaxSoldProductsCount($pdo);
			$retArray["prodssum"]  = self::getMaxSoldProductsSum($pdo);
			$retArray["durations"] = self::getGuestDuration($pdo);
		}
		
		return $retArray;
	}
	
	/*
	 * returns an array:
	 * 	hour, sum
	 * 	hour, sum
	 */
	private function iterateForHours($pdo,$theDateStr,$noOfIterations,$mustBeClosed) {
		$retArray = array();
		$sumMax = 0.0;
		for ($i=0;$i<$noOfIterations;$i++) {
			$startDateTime = $theDateStr . " $i:00:00";
			$endDateTime =  $theDateStr . " $i:59:59";
			$sum = $this->sumBetween($pdo,$startDateTime,$endDateTime,$mustBeClosed);
			if ($sumMax < $sum) {
				$sumMax = $sum;
			}
			$retArray[] = array("iter" => $i, "sum" => $sum);
		}
		return array("max" => $sumMax, "content" => $retArray);
	}
	
	/*
	 * returns an array wioth "content"
	 * 	day, sum with day 0..31, 
	 * 	day, sum ...
	 */
	private function iterateForDays($pdo,$theMonthYearStr,$noOfIterations,$mustBeClosed) {
		$retArray = array();
		$sumMax = 0.0;
		for ($i=1;$i<($noOfIterations+1);$i++) {
			$dayInTwoDigists = sprintf('%02d', $i);
			$startDateTime = $theMonthYearStr . "-$dayInTwoDigists 00:00:00";
			$endDateTime =  $theMonthYearStr . "-$dayInTwoDigists 23:59:59";
			$sum = $this->sumBetween($pdo,$startDateTime,$endDateTime,$mustBeClosed);
			if ($sumMax < $sum) {
				$sumMax = $sum;
			}
			$retArray[] = array("iter" => $i, "sum" => $sum);
		}
		return array("max" => $sumMax, "content" => $retArray);
	}
	
	private function sumBetween($pdo,$startDateTime,$endDateTime,$mustBeClosed) {
		$sql = "SELECT sum(brutto) as sumtotal FROM %bill% ";
		$sql .= "WHERE status is null "; // no cash insert or take off, no stornos
		$sql .= "AND billdate between ? AND ? ";
		if ($mustBeClosed) {
			$sql .= "AND closingid is not null"; // and must be in a closing
		}
		$sum = 0.0;
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($startDateTime,$endDateTime));
		$row =$stmt->fetchObject();
		
		if ($row != null) {
			$theSqlSum = $row->sumtotal;
			if ($theSqlSum != null) {
				$sum = $theSqlSum;
			}
		}
		return $sum;
	}
	
	function cmp($a, $b)
	{
		$asum = $a['sum'];
		$bsum = $b['sum'];
		if ($asum == $bsum) {
			return 0;
		}
		return ($asum < $bsum) ? 1 : -1;
	}
	
	/*
	 * returns a sorted by prices list: 
	 * 		array("prodid" => $aProdId,"prodname" => $aProd['prodname'], "sum" => $sumprice);
	 * 		array("prodid" => $aProdId,"prodname" => $aProd['prodname'], "sum" => $sumprice);
	 * 		(...)
	 */
	public function sumSortedByProducts($pdo,$startDateTime,$endDateTime,$closidstart=null,$closidend=null) {
		// first get all products and with their id and name
		
		if (is_null($closidstart)) {
			$sql = "SELECT DISTINCT productid from %queue%,%bill%,%products% ";
			$sql .= "WHERE %queue%.productid=%products%.id ";
			$sql .= "AND billid is not null AND %queue%.billid=%bill%.id ";
			$sql .= "AND billdate between ? AND ? ";
			$sql .= "AND %bill%.closingid is not null ";
			$sql .= "AND %bill%.status is null";
			
			$result = CommonUtils::fetchSqlAll($pdo, $sql, array($startDateTime,$endDateTime));
		} else {
			$sql = "SELECT DISTINCT productid from %queue% Q,%bill% B,%products% P ";
			$sql .= "WHERE Q.productid=P.id ";
			$sql .= "AND billid is not null AND Q.billid=B.id ";
			$sql .= "AND B.closingid is not null ";
			$sql .= "AND B.closingid between ? AND ? ";
			$sql .= "AND B.status is null";
			
			$result = CommonUtils::fetchSqlAll($pdo, $sql, array($closidstart,$closidend));
		}
		$prods = array();
		
		$sql = "SELECT longname FROM %products% WHERE id=?";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		foreach($result as $aProd) {
			$stmt->execute(array($aProd["productid"]));
			$row = $stmt->fetchObject();
			$prods[] = array("prodid" => $aProd['productid'],"prodname" => $row->longname);
		}
		
		// now iterate over all prods
		$sumMax = 0.0;
		$prodinfos = array();
		foreach ($prods as $aProd) {
			$aProdId = $aProd['prodid'];
			
			if (is_null($closidstart)) {
				$sql = "SELECT sum(price) as sumprice, count(%queue%.id) as prodcount from %queue%,%bill%,%products% ";
				$sql .= "WHERE %queue%.productid=%products%.id ";
				$sql .= "AND billid is not null AND %queue%.billid=%bill%.id ";
				$sql .= "AND billdate between ? AND ? ";
				$sql .= "AND %bill%.closingid is not null ";
				$sql .= "AND productid=?";

				$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
				$stmt->execute(array($startDateTime,$endDateTime,$aProdId));
				$row =$stmt->fetchObject();
			} else {
				$sql = "SELECT sum(price) as sumprice, count(%queue%.id) as prodcount from %queue%,%bill%,%products% ";
				$sql .= "WHERE %queue%.productid=%products%.id ";
				$sql .= "AND billid is not null AND %queue%.billid=%bill%.id ";
				$sql .= "AND %bill%.closingid is not null ";
				$sql .= "AND %bill%.closingid between ? AND ? ";
				$sql .= "AND productid=?";

				$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
				$stmt->execute(array($closidstart,$closidend,$aProdId));
				$row =$stmt->fetchObject();
			}
			
			if ($row != null) {
				$sumprice = $row->sumprice;
				if ($sumMax < $sumprice) {
					$sumMax = $sumprice;
				}
				if ($sumprice != null) {
					$prodinfo = $aProd['prodname'] . " (" . $row->prodcount . "x)";
					$prodinfos[] = array("prodid" => $aProdId,"iter" => $prodinfo, "sum" => $sumprice);
				}
			}
		}
		
		uasort($prodinfos, array($this,'cmp'));
		
		// due to a bug somehow the order is not kept when transformed to json - copy...
		$prodInfoSorted = array();
		foreach($prodinfos as $prodinfo) {
			$prodInfoSorted[] = array("iter" => $prodinfo['iter'],"sum" => $prodinfo['sum']);
		}

		return array("max" => $sumMax, "content" => $prodInfoSorted);
	}
	
	static function getRating($pdo,$sql,$start,$end) {
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute(array($start,$end));
		$row =$stmt->fetchObject();
		
		if (!is_null($row)) {
			return(intval($row->count));
		} else {
			return 0;
		}
	}
	
	static function getRelation($val1,$val2,$val3,$maxPercent) {
		$total = $val1 + $val2 + $val3;
		if ($total == 0) {
			return array (0.0,0.0,0.0,$maxPercent);
		} else {
			$rel = $maxPercent / ((double)$total);
			return array($rel * $val1,$rel * $val2,$rel * $val3,0.0);
		}
	}
	
	static function getRatingOfDay($pdo,$aDay,$start,$end) {
		$serviceGood = self::getRating($pdo,self::$sql_service_good, $start, $end);
		$serviceOK = self::getRating($pdo,self::$sql_service_ok, $start, $end);
		$serviceBad = self::getRating($pdo,self::$sql_service_bad, $start, $end);
		$serviceRel = self::getRelation($serviceGood,$serviceOK,$serviceBad,95);
		
		$kitchenGood = self::getRating($pdo,self::$sql_kitchen_good, $start, $end);
		$kitchenOK = self::getRating($pdo,self::$sql_kitchen_ok, $start, $end);
		$kitchenBad = self::getRating($pdo,self::$sql_kitchen_bad, $start, $end);
		$kitchenRel = self::getRelation($kitchenGood,$kitchenOK,$kitchenBad,95);
		
		$totalRatings = self::getRating($pdo,self::$sql_ratings, $start, $end);
		
		$date = new DateTime($aDay);
		
		return array("day" => $date->format('d.m.Y'), "service" => $serviceRel, "kitchen" => $kitchenRel, "total" => $totalRatings);
	}
	
	function getRatings($pdo,$last30days,$startPeriod,$endPeriod){
		$reports = array();
		foreach($last30days as $aDay) {
			$start = $aDay . " 00:00:00";
			$end = $aDay . " 23:59:59";
			$reports[] = self::getRatingOfDay($pdo,$aDay,$start,$end);
		}
		
		$sql = self::$sql_remarks;
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($startPeriod,$endPeriod));
		$result = $stmt->fetchAll();
		
		return array("statistics" => $reports,"remarks" =>$result);
	}
	
	function getUserSums($pdo) {
		$sql = "SELECT userid,username as iter,";
		
		$sql .= "ROUND(sum(brutto),2) as sum,";
		
		$sql .= "ROUND(sum(if(paymentid='1',brutto,'0.00')),2) as sumonlybar,";
		
		$sql .= "ROUND(sum(if(status = 'c',brutto,'0.00')),2) as sumcash ";
		
		$sql .= "FROM %bill%,%user% WHERE userid=%user%.id AND closingid is null GROUP BY userid,username";
		
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		$stmt->execute();
		$result = $stmt->fetchAll();
		
		$sumMax = 0.0;
		foreach ($result as $a) {
			if ($a["sum"] > $sumMax) {
				$sumMax = $a["sum"];
			}
		}
		
		return array("max" => $sumMax, "content" => $result);
	}
	
	
	public static function getOpenTables($pdo) {
		$sql = "SELECT id,roomname FROM %room% WHERE removed is null";
		$rooms = CommonUtils::fetchSqlAll($pdo, $sql,null);
		
		$tableCountTotal = 0;
		$tableCountOpen = 0;
		$sum = 0.0;
		foreach($rooms as $aRoom) {
			$roomId = $aRoom["id"];
			
			$sql = "SELECT count(id) as countid FROM %resttables% WHERE %resttables%.roomid=?";
			$howManyTables = CommonUtils::getRowSqlObject($pdo, $sql, array($roomId));
			$tableCountTotal += $howManyTables->countid;
			
			$sql = "SELECT %resttables%.id as id,%resttables%.tableno as name,IFNULL(SUM(IF(%queue%.toremove='0' AND %queue%.paidtime is null AND %queue%.isclosed is null,%queue%.price,0.00)),0.00) as pricesum FROM %resttables% ";
			$sql .= " LEFT OUTER JOIN %queue% ON %queue%.tablenr=%resttables%.id WHERE %resttables%.removed is null AND ";
			$sql .= " %resttables%.roomid=? GROUP BY %resttables%.id,name";
			
			$tables = CommonUtils::fetchSqlAll($pdo, $sql, array($roomId));
			
			
			foreach($tables as $aTable) {
				$sum += $aTable["pricesum"];
				
				if ($aTable["pricesum"] != '0.00') {
					$tableCountOpen++;
				}
			}
		}
		return array("tablestotal" => $tableCountTotal,"opentables" => $tableCountOpen,"sum" => $sum);
	}
	
	public static function getMaxSoldProductsCount($pdo) {
		
		$sql = "SELECT longname,productid,count(productid) as value from %queue%,%bill%,%products% ";
		$sql .= "WHERE %queue%.productid=%products%.id ";
		$sql .= "AND productid=%products%.id ";
		$sql .= "AND billid is not null AND %queue%.billid=%bill%.id ";
		$sql .= "AND DATE(billdate) = CURDATE() ";
		$sql .= "AND %bill%.status is null ";
		$sql .= "GROUP BY longname,productid ";
		$sql .= "ORDER BY value DESC ";
		$sql .= "LIMIT 10";

		$result = CommonUtils::fetchSqlAll($pdo, $sql, null);
	
		return $result;
	}
	
	public static function getMaxSoldProductsSum($pdo) {
		
		$sql = "SELECT longname,productid,sum(price) as value from %queue%,%bill%,%products% ";
		$sql .= "WHERE %queue%.productid=%products%.id ";
		$sql .= "AND productid=%products%.id ";
		$sql .= "AND billid is not null AND %queue%.billid=%bill%.id ";
		$sql .= "AND DATE(billdate) = CURDATE() ";
		$sql .= "AND %bill%.status is null ";
		$sql .= "GROUP BY longname,productid ";
		$sql .= "ORDER BY value DESC ";
		$sql .= "LIMIT 10";
		
		$result = CommonUtils::fetchSqlAll($pdo, $sql, null);
	
		return $result;
	}
	
	public static function getGuestDuration($pdo) {
		date_default_timezone_set(DbUtils::getTimeZone());
		$currentHour = date('H');

		$stat = array();
		$sql = "SELECT HOUR(paidtime) as hour,ROUND(AVG(TIME_TO_SEC(TIMEDIFF(paidtime,ordertime))/60)) as average";
		$sql .= " FROM %queue% WHERE paidtime is not null AND %queue%.toremove='0' AND DATE(paidtime) = DATE(NOW()) AND HOUR(paidtime)=? GROUP BY hour";
		$stmt = $pdo->prepare(DbUtils::substTableAlias($sql));
		for ($hour = 0; $hour <= $currentHour; $hour++) {
			$stmt->execute(array($hour));
			$result = $stmt->fetchAll();
			if (count($result) > 0) {
				$stat[] = array("hour" => $hour,"average" => $result[0]["average"]);
			} else {
				$stat[] = array("hour" => $hour,"average" => 0);
			}
		}
	
		return $stat;
	}
}