<?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;
	
	function __construct() {
		$this->dbutils = new DbUtils();
		$this->queue = new QueueContent();
		$this->commonUtils = new CommonUtils();
		$this->userrights = new Userrights();
	}
	
	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;
			}
		}
		
		if($command == 'getStats') {
			$this->getStats();
		} else {
			echo "Command not supported.";
		}
	}
	
	private function getStats() {
		$alldates = $this->getDates();
		
		$this->getReports($alldates);
	}
	
	private function getDates() {
		date_default_timezone_set('Europe/Berlin');
		$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 = $this->getMonthName($month);
		$monthAndYearOfThisMonth = date("Y-m",strtotime($currentTimeStr));
		$thisMonthName = $this->getMonthName($month);
		
		// last month
		$firstDayOfLastMonth = date("Y-m-01", strtotime('-1 month') );
		$lastDayOfLathMonth = date("t", strtotime('-1 month') );
		$iterations = date("t", strtotime('-1 month') );
		$lastMonth = date("m",strtotime('-1 month') );
		$monthAndYearOfLastMonth = date("Y-m", strtotime('-1 month'));
		$lastMonthComplete = date("Y-m-d",strtotime('-1 month') ) . " 00:00:00";
		$lastMonthName = $this->getMonthName($lastMonth);
		
		$retArray = array(
				"todayDate" => $todayDate,
				"todayHour" => $todayHour,
				"currentTimeStr" => $currentTimeStr,
				"yesterdayDate" => $yesterdayDate,
				"monthAndYearOfLastMonth" => $monthAndYearOfLastMonth,
				"lastDayOfLathMonth" => $lastDayOfLathMonth,
				"lastMonthComplete" => $lastMonthComplete,
				"lastMonthName" => $lastMonthName,
				"currentDay" => $currentDay,
				"monthAndYearOfThisMonth" => $monthAndYearOfThisMonth,
				"thisMonthName" => $thisMonthName);
		return $retArray;
	}
	
	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 ($allDates) {
		$pdo = $this->dbutils->openDbAndReturnPdo();
		$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['lastDayOfLathMonth']),true);
		
		// products in the last 30 days:
		$retArrayProds = $this->sumSortedByProducts($pdo, $allDates['lastMonthComplete'], $allDates['currentTimeStr']);
		$pdo->commit();
		
		$retArray = array("today" => $retArrayToday, 
				"yesterday" => $retArrayYesterday,
				"thismonth" => $retThisMonth,
				"lastmonth" => $retArrayLastMonth,
				"prodsums" => $retArrayProds,
				"lastmonthname" => $allDates['lastMonthName'],
				"thismonthname" => $allDates['thisMonthName']);
		
		echo json_encode($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" => $sumprice);
	 * 		(...)
	 */
	private function sumSortedByProducts($pdo,$startDateTime,$endDateTime) {
		// first get all products and with their id and name
		
		$sql = "SELECT DISTINCT productid,productname 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";
		
		$stmt = $pdo->prepare($this->dbutils->resolveTablenamesInSqlString($sql));
		$stmt->execute(array($startDateTime,$endDateTime));
		$result = $stmt->fetchAll();
		$prods = array();
		
		foreach($result as $row) {
			$prods[] = array("prodid" => $row['productid'],"prodname" => $row['productname']);
		}
		
		// now iterate over all prods
		$sumMax = 0.0;
		$prodinfos = array();
		foreach ($prods as $aProd) {
			$aProdId = $aProd['prodid'];
			
			$sql = "SELECT sum(price) as sumprice 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();
			
			if ($row != null) {
				$sumprice = $row->sumprice;
				if ($sumMax < $sumprice) {
					$sumMax = $sumprice;
				}
				if ($sumprice != null) {
					$prodinfos[] = array("prodid" => $aProdId,"iter" => $aProd['prodname'], "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);
	}	
}
?>