<?php

class Prices{
    /**
     * calculate total price for a product in a package
     * @param  boolean $isRecurring is the price recurring
     * @param  FLOAT  $unitCost    cost for the product
     * @param  INT  $payPeriod   pay period in case of recurring
     * @param  INT  $quantity    quantity of the product in the package
     * @return FLOAT              total cost for a prodcut
     */
    private function calculateTotalPrice($isRecurring, $unitCost, $payPeriod, $quantity){
        $totalUnitCost = intVal($isRecurring) === 1
            ? intVal($unitCost) * intVal($payPeriod)
            : intVal($unitCost);
        $totalUnitCost *= $quantity;

        return $totalUnitCost;
    }

    /**
     * get max price for products with multiple selection
     * @param  FLOAT $totalCategoryUnitCost max value for category
     * @param  FLOAT $totalUnitCost         cost of the product
     * @return FLOAT                        final cost for the product
     */
    private function getMultiProductsTotal($totalCategoryUnitCost, $totalUnitCost){
        return $totalCategoryUnitCost < $totalUnitCost
        ? $totalUnitCost
        : $totalCategoryUnitCost;
    }

    /**
     * get pacakge product prices grouped by categories
     * @param  INT $idPackage  id for package
     * @return Array           product prices
     */
    public function getPackageProductPrices($idPackage, $sumBy = 'category'){
        global $database;

        $sql = "SELECT scp.unitCostPrice AS unitCostPrice,
                       scp.unitVatCost AS unitVatCost,
                       scp.isPriceRecurring AS isPriceRecurring,
                       scp.payPeriod AS payPeriod,
                       pc.category AS productCategory,
                       pt.type AS productType,
                       rpp.quantity AS quantity
                FROM ".TABLES['suppliers_countries_products']." scp
                INNER JOIN ".TABLES['product_categories']." pc
                    ON pc.id=scp.idProductCategory
                INNER JOIN ".TABLES['product_types']." pt
                    ON pt.id = pc.idType
                INNER JOIN ".TABLES['rel_package_products']." rpp
                    ON rpp.idProduct=scp.idProduct
                INNER JOIN
                    (SELECT
                      rpp_last.idPackage,
                      MAX(rpp_last.packageInstance) AS maxInstance
                    FROM
                      ".TABLES['rel_package_products']." rpp_last
                    GROUP BY rpp_last.idPackage) last_instance
                    ON last_instance.idPackage = rpp.idPackage
                    AND last_instance.maxInstance = rpp.packageInstance
                WHERE rpp.idPackage=$idPackage";

        $query = $database->query($sql);
        $data['productsPrices'] = [];

        while($row = $database->fetchArray($query)){
            $productKey = $sumBy === 'type' ? $row['productType'] : $row['productCategory'];
            if(!isset($data['productsPrices'][$productKey])){
                $data['productsPrices'][$productKey]['totalUnitCost'] = 0;
                $data['productsPrices'][$productKey]['totalVatCost'] = 0;
            }

            unset($totalCategoryUnitCost);
            unset($totalCategoryVatCost);

            $totalCategoryUnitCost =& $data['productsPrices'][$productKey]['totalUnitCost'];
            $totalCategoryVatCost =& $data['productsPrices'][$productKey]['totalVatCost'];

            if($sumBy === 'type' && $row['productType'] === 'service') {
                $totalUnitCost = $this->calculateTotalPrice(0, $row['unitCostPrice'], $row['payPeriod'], $row['quantity']);
                $totalVatCost = $this->calculateTotalPrice(0, $row['unitVatCost'], $row['payPeriod'], $row['quantity']);

                if($row['isPriceRecurring'] == 1) {
                    if(!isset($data['productsPrices'][$row['productType']]['recurringPrice'])) {
                        $data['productsPrices'][$row['productType']]['recurringPrice'] = 0;
                        $data['productsPrices'][$row['productType']]['recurringVatPrice'] = 0;
                    }
                    $data['productsPrices'][$row['productType']]['recurringPrice'] += $totalUnitCost;
                    $data['productsPrices'][$row['productType']]['recurringVatPrice'] += $totalVatCost;
                } else {
                    if(!isset($data['productsPrices'][$row['productType']]['recurringPrice'])) {
                        $data['productsPrices'][$row['productType']]['fixedPrice'] = 0;
                        $data['productsPrices'][$row['productType']]['fixedVatPrice'] = 0;
                    }
                    $data['productsPrices'][$row['productType']]['fixedPrice'] += $totalUnitCost;
                    $data['productsPrices'][$row['productType']]['fixedVatPrice'] += $totalVatCost;
                }
            } else {
                $totalUnitCost = $this->calculateTotalPrice($row['isPriceRecurring'], $row['unitCostPrice'], $row['payPeriod'], $row['quantity']);
                $totalVatCost = $this->calculateTotalPrice($row['isPriceRecurring'], $row['unitVatCost'], $row['payPeriod'], $row['quantity']);
            }

            if($row['productType'] === 'installation'){
                $totalCategoryUnitCost = $this->getMultiProductsTotal($totalCategoryUnitCost, $totalUnitCost);
                $totalCategoryVatCost = $this->getMultiProductsTotal($totalCategoryVatCost, $totalVatCost);
            } else {
                $totalCategoryUnitCost += $totalUnitCost;
                $totalCategoryVatCost += $totalVatCost;
            }
        }

        return $data['productsPrices'];
    }

    /**
     * get commission split
     * @param  INT $idPackage id for commission split
     * @return HashArray      commission split percentqages
     */
    public function getCommissionSplit($idPackage){
        global $database;

        $sql = "SELECT bcs.brokerSplit as broker,
                bcs.commercialLeadSplit as commercialLead,
                bcs.payMargin
                FROM ".TABLES['broker_commission_split']." bcs
                WHERE idPackage=$idPackage";
        $commissionSplit = $database->fetchResultArray($sql);

        return !empty($commissionSplit) ? $commissionSplit[0] : [];
    }

    /**
     * get product prices list and comissions
     * @param  INT $idPackage id of the package
     * @param  BOOLEAN $getOnlySelectedTpes if true will return just prices set by the broker
     * @return json   list of prices and list of comission
     */
    public function getPriceTypes($idPackage, $getOnlySelectedTpes = false){
        global $database;
        $joinType = $getOnlySelectedTpes ? "INNER JOIN" : "LEFT OUTER JOIN";

        $sql = "SELECT pt.id as idPaymentType,
                    pt.payType,
                    pt.packagePayPeriod,
                    pt.servicesContractPeriod,
                    pt.maxContractPeriod,
                    pt.periodUnit,
                    plb.minimalFixedPrice,
                    plb.principalAmount,
                    plb.minimalServicesPrice
                FROM ".TABLES['payment_types']." pt
                $joinType
                (SELECT idPaymentType,
					           minimalFixedPrice,
                               principalAmount,
                               minimalServicesPrice
					FROM ".TABLES['price_list_broker']."
                    WHERE idPackage=$idPackage) plb
                ON pt.id=plb.idPaymentType";

        $query = $database->query($sql);
        while($row = $database->fetchArray($query)){
            $row['minimalRecurentPrice'] = $row['packagePayPeriod'] > 0
                ? $this->PMT($interestRateValue['interestRate'] / 100, $row['packagePayPeriod'], $row['principalAmount'])
                : 0;
            $row['minimalRecurentPrice'] = number_format($row['minimalRecurentPrice'], 2, '.', '');
            $data['priceTypes'][] = $row;
        }
    }

    /**
     * get price list for commercial leads
     * @param  INT $idPackage           id for packge
     * @param  INT $idCommercialLead    id for commrcial lead or id for user , depends on $targetIdType
     * @param  String  $targetIdType    target for the id, userId=> id for the user, roleId => id for the role
     * @return Array                    commercial lead price list
     */
    public function getCommercialLeadPrices($idPackage = 0, $idCommercialLead = 0, $targetIdType = 'userId'){
        global $database, $user;
        $idPackage = $database->escapeValue($idPackage);
        $whereSql = "";
        $clPrices = [];

        if($idPackage){
            $whereSql .= " AND plcl.idPackage=$idPackage";
        }

        if($idCommercialLead){
            $whereSql .= $targetIdType === 'userId' ? " AND cl.idUser=$idCommercialLead" : " AND cl.id=$idCommercialLead";
        }

        $sql = "SELECT
                    plcl.id AS idPrice,
                    plcl.idPackage,
                    plcl.idPaymentType,
                    pt.payType,
                    IFNULL(plcl.idCustomer, 0) as idCustomer,
                    plcl.fixedExtra ,
                    plcl.recurentExtra,
                    plcl.servicesExtra,
                    plcl.visibleToCustomer,
                    pt.packagePayPeriod
                FROM ".TABLES['price_list_commercial_lead']." plcl
                INNER JOIN ".TABLES['payment_types']." pt
                    ON pt.id = plcl.idPaymentType
                INNER JOIN ".TABLES['commercial_leads']." cl
                    ON cl.id=plcl.idCommercialLead
                WHERE 1=1 $whereSql";
        $query = $database->query($sql);

        while($row = $database->fetchArray($query)){
            $clPrices[$row['idPackage']][$row['idCustomer']][$row['idPaymentType']] = $row;
        }

        return $clPrices;
    }

    /**
     * calculate total cost for a package
     * @param  HasArray $productsPrices product prices grouped by categoreis
     * @return Float                    total cost
     */
    public function calculatePackageTotalCost($productsPrices){
        $total = 0;
        foreach ($productsPrices as $category) {
            $total += $category['totalUnitCost'];
        }

        return $total;
    }

    /**
     * calculate package total margin
     * @param  HashArray $payType   pay type hash array (minimalFixedPrice and principalAmount keys required)
     * @param  Float $totalCost     total cost for package
     * @return Float                package margin
     */
    private function calculateMargin($payType, $totalCost){
        $totalGain = $payType['minimalFixedPrice'] + $payType['principalAmount'];

        return $totalGain - $totalCost;
    }

    /**
     * get price margins based on comission split
     * @param  HashArray $commisisonPercent commission split (commercialLead and broker keys requried)
     * @param  HashArray $payType           pay type hash array (required to get the margin)
     * @param  Float $totalCost             total cost for package
     * @return HashArray                    margins per user role
     */
    public function getPriceMargins($commisisonPercent, $payType, $totalCost){
        $margin = $this->calculateMargin($payType, $totalCost);
        if($margin < 0){
            return [
                'margin' => 0,
                'clMargin' => 0,
                'brokerMargin' => 0
            ];
        }else{
            return [
                'margin' => $margin,
                'clMargin' => ($margin * $commisisonPercent['commercialLead'] / 100),
                'brokerMargin' => ($margin * $commisisonPercent['broker'] / 100)
            ];
        }
    }

    /**
     * Copy of Excel's PMT function.
     * Credit: http://thoughts-of-laszlo.blogspot.nl/2012/08/complete-formula-behind-excels-pmt.html
     *
     * @param double $interest        The interest rate for the loan.
     * @param int    $num_of_payments The total number of payments for the loan in months.
     * @param double $PV              The present value, or the total amount that a series of future payments is worth now;
     *                                Also known as the principal.
     * @param double $FV              The future value, or a cash balance you want to attain after the last payment is made.
     *                                If fv is omitted, it is assumed to be 0 (zero), that is, the future value of a loan is 0.
     * @param int    $Type            Optional, defaults to 0. The number 0 (zero) or 1 and indicates when payments are due.
     *                                0 = At the end of period
     *                                1 = At the beginning of the period
     *
     * @return float
     */
    public function PMT($interest, $num_of_payments, $PV, $FV = 0.00, $Type = 0){
        /*$interest = $interest / 12;
    	$xp=pow((1+$interest),$num_of_payments);
    	return
    		($PV* $interest*$xp/($xp-1)+$interest/($xp-1)*$FV)*
    		($Type==0 ? 1 : 1/($interest+1));*/
        $rates = [
            24 => 4.282,
            30 => 3.451,
            36 => 2.896,
            42 => 2.500,
            48 => 2.223,
            54 => 2.025,
            60 => 1.834
        ];

        $interest = isset($rates[$num_of_payments]) ? $rates[$num_of_payments] : 10;

        return round($PV * ($interest / 100));
    }

    /**
     * calculate fixed mortage based on principal amount
     * @param  HashArray $payType      pay type hash array (principalAmount and packagePayPeriod keys required)
     * @param  Float $clMargin         commercial lead margin
     * @param  Float $interestRate     interest rate percent value
     * @return Float                   fixed mortage formated to two decimals
     */
    public function getRecurrentPriceMortage($payType, $clMargin, $interestRate){
        $newPrincipalAmount = $payType['principalAmount'] - $clMargin;
        $interestRate = $interestRate / 100;
        $fixedMortage = $this->PMT($interestRate, $payType['packagePayPeriod'], $newPrincipalAmount);

        return number_format($fixedMortage, 2, '.', '');
    }
}