<?php

use chillerlan\QRCode\QRCode;
use chillerlan\QRCode\QROptions;
use chillerlan\QRCode\Output\QROutputInterface;

class PreorderBillingInvoice extends mfBaseModel {
    protected $forcestr = ["company", "zip", "email", "phone"];
    private $owner;
    private $netowner;
    private $positions;
    private $pdf;
    private $csv;
    private $detailpdf;

    private $emailLog;
    private $creator;
    private $editor;


    public static function getNextInvoiceNumber($netowner_id) {
        $last_invoice_num = self::getLastInvoiceNumber($netowner_id);
        if(!$last_invoice_num) {
            return TT_PREORDER_BILLING[$netowner_id]["first-invoice-num"];
        }

        $new_invoice_num = $last_invoice_num + 1;
        return $new_invoice_num;
    }

    public static function getLastInvoiceNumber($netowner_id) {
        $last_invoice = PreorderBillingInvoice::getLast(["invoice_number" => true, "netowner_id" => $netowner_id]);
        if(!$last_invoice || !$last_invoice->invoice_number) {
            return false;
        }
        return $last_invoice->invoice_number;
    }

    public function createPdf() {
        if($this->id) {
            $invoice_number = $this->invoice_number;
            $invoice_date = new DateTime($this->invoice_date);
        } else {
            $invoice_number = "PROFORMA";
            $invoice_date = new DateTime("@1");
        }

        $conf = TT_PREORDER_BILLING[$this->netowner_id];
        $netop_conf = null;
        if($this->owner_id && array_key_exists($this->owner_id, TT_PREORDER_BILLING[$this->netowner_id]["netoperators"])) {
            $netop_conf = TT_PREORDER_BILLING[$this->netowner_id]["netoperators"][$this->owner_id];
        }

        $filename = "";
        $positions = $this->getProperty("positions");

        $vat = [];
        foreach ($positions as $p) {
            if (!array_key_exists($p->vatrate, $vat)) {
                $vat[$p->vatrate] = 0;
            }
            $vat[$p->vatrate] += $p->price_gross - ($p->price * $p->amount);
        }

        $pdf_vars = [
            "invoice" => $this,
            "vat" => $vat,
            "qrcode" => $this->getSepaQRCode($this->netowner_id, $invoice_number, round($this->total_gross, 2)),
        ];

        $me = new User();
        $me->loadMe();

        // Replace placeholders in header
        $headerHtml = file_get_contents(BASEDIR . "/Layout/default/PreorderBillingInvoice/PDF_HEADER-".$this->netowner_id.".html");
        $headerHtml = str_replace("{{ basedir }}", BASEDIR, $headerHtml);
        $headerHtml = str_replace("{{ addressLine_1 }}", $this->company ? $this->company : "", $headerHtml);
        $headerHtml = str_replace("{{ addressLine_2 }}", $this->firstname . " " . $this->lastname, $headerHtml);

        $headerHtml = str_replace("{{ addressLine_4 }}", nl2br($this->street), $headerHtml);
        $headerHtml = str_replace("{{ addressLine_5 }}", $this->zip . " " . $this->city, $headerHtml);
        $headerHtml = str_replace("{{ addressLine_6 }}", $this->country != "Österreich" ? $this->country : "", $headerHtml);
        $headerHtml = str_replace("{{ customerNumber }}", $this->fibu_account_number, $headerHtml);
        $headerHtml = str_replace("{{ invoiceNumber }}", $invoice_number, $headerHtml);
        $headerHtml = str_replace("{{ invoiceDate }}", $invoice_date->format("d.m.Y"), $headerHtml);
        $headerHtml = str_replace("{{ caseWorker }}", $me->name, $headerHtml);
        $headerHtml = str_replace("{{ caseWorkerPhone }}", $me->mobile, $headerHtml);
        $headerHtml = str_replace("{{ caseWorkerEmail }}", $me->email, $headerHtml);
        //$headerHtml = str_replace("{{ orderNumber }}", "WVR / 52", $headerHtml);
        $headerHtml = str_replace("{{ vatHtml }}", $this->uid ? "<tr><th>Ihre UID:</th><td>" . $this->uid . "</td></tr>" : "", $headerHtml);

        if($netop_conf) {
            if(array_key_exists("order-number", $netop_conf) && $netop_conf["order-number"]) {
                $headerHtml = str_replace("{{ orderNumberHtml }}",  "<tr><th>Auftrag:</th><td>" . $netop_conf["order-number"] . "</td></tr>", $headerHtml);
            } else {
                $headerHtml = str_replace("{{ orderNumberHtml }}",  "", $headerHtml);
            }

            if(array_key_exists("address-rctp-extra-text", $netop_conf) && $netop_conf["address-rctp-extra-text"]) {
                $headerHtml = str_replace("{{ addressLine_3 }}",  $netop_conf["address-rctp-extra-text"], $headerHtml);
            } else {
                $headerHtml = str_replace("{{ addressLine_3 }}",  "", $headerHtml);
            }
        } else {
            $headerHtml = str_replace("{{ orderNumberHtml }}",  "", $headerHtml);
            $headerHtml = str_replace("{{ addressLine_3 }}",  "", $headerHtml);

        }


        $headerFile = BASEDIR . "/var/temp/invoice_header-" . date("U") . "-" . rand(1000, 9999) . ".html";
        file_put_contents($headerFile, $headerHtml);


        // Replace placeholders in header
        $footerHtml = file_get_contents(BASEDIR . "/Layout/default/PreorderBillingInvoice/PDF_FOOTER-".$this->netowner_id.".html");
        $footerHtml = str_replace("{{ bank_iban }}", $conf["bank-account-iban"], $footerHtml);
        $footerHtml = str_replace("{{ bank_bic }}", $conf["bank-account-bic"], $footerHtml);

        $footerFile = BASEDIR . "/var/temp/preorderbillinginvoice_footer-" . date("U") . "-" . rand(1000, 9999) . ".html";
        file_put_contents($footerFile, $footerHtml);


        $pdf = new PdfForm("PreorderBillingInvoice/PDF_MAIN-".$this->netowner_id, $pdf_vars);
        $wkhtmltopdfArgs = "--margin-top 2mm --header-spacing 90 --header-html '$headerFile' --footer-html '$footerFile'";

        $filename = $pdf->render($wkhtmltopdfArgs);

        if($conf["invoice-pdf-bg-file"]) {
            // run pdftk with $filename as input and $conf["invoice-pdf-bg-file"] as output
            // to add background to pdf
            $bg_file = $conf["invoice-pdf-bg-file"];
            $temp_file_name = tempnam(TEMP_DIR, "invoice-pdftk").".pdf";
            $pdftk_cmd = PDFTK_BIN_PATH." '$filename' background '$bg_file' output '$temp_file_name'";

            $this->log->debug(__METHOD__." $pdftk_cmd");
            shell_exec($pdftk_cmd);

            $filename = $temp_file_name;
        }

        return $filename;

    }

    public function getSepaQRCode($netowner_id, $invoice_number, $amount) {
        if(!$netowner_id) return "";
        $conf = TT_PREORDER_BILLING[$netowner_id];
        $IBAN = str_replace(" ", "", $conf["bank-account-iban"]);
        $BIC = str_replace(" ", "", $conf["bank-account-bic"]);
        $Owner = $conf["bank-account-owner"];

        $epc = "BCD
001
1
SCT
$BIC
$Owner
$IBAN
EUR$amount

$invoice_number

RML Infrastruktur GmbH";

        return (new QRCode)->render($epc);
    }

    public function sendByEmail($to_email = false) {
        if(!$this->id) return false;

        // get pdf file
        $ifile = PreorderBillingInvoiceFile::createFromInvoice($this);
        if(!$ifile) {
            return false;
        }
        $pdf = $ifile->file;

        $pdf_filename = false;
        try {
            $pdf_filename = $pdf->getFullPath();
        } catch(\Exception $e) {
            $this->log->error("PDF-File for Invoice ".$this->id." not found");
        }
        if(!$pdf_filename || !file_exists($pdf_filename)) {
            return false;
        }

        // get detail file
        $detail_file = null;
        $netowner = $this->getProperty("netowner");
        if(!$netowner || !array_key_exists($netowner->id, TT_PREORDER_BILLING)) {
            return false;
        }
        $netowner_config = TT_PREORDER_BILLING[$netowner->id];

        if(array_key_exists($this->owner_id, $netowner_config["netoperators"])) {
            $anb_config = $netowner_config["netoperators"][$this->owner_id];
            $detail_format = $anb_config["invoice-detail-file-format"];
            if($detail_format == "csv") {
                $detail_file = $this->getProperty("csv");

            }
            if($detail_format == "pdf") {
                $detail_file = $this->getProperty("detailpdf");
            }
        }


        // get csv file


        $tpl = new Layout();
        $tpl->setTemplate("Emailtemplates/preorder-invoice/rml/invoice-email.html");
        if($this->owner_id) {
            $tpl->setTemplate("Emailtemplates/preorder-invoice/rml/invoice-email-anb.html");
        }

        $pdf_vars = [
            "invoice" => $this
        ];

        foreach($pdf_vars as $name => $val) {
            $tpl->set($name, $val);
        }

        $body = $tpl->render();
        $values = $tpl->getReturnedValue();

        $subject = $values['subject'];
        $from = $values['from_email'];
        $from_name = $values['from_email_name'];
        if($to_email) {
            $to = $to_email;
        } else {
            $to = trim($this->email);
        }

        if(!$to) {
            $this->log->error(__METHOD__.": Invoice ".$this->invoice_number." missing email");
        }


        if(!$subject || !$from || !$from_name || !$to) {
            $this->log->warn(__METHOD__.": Invoice ".$this->invoice_number." could not be sent. Values missing. (subject: '$subject', from: '$from_name', from_email: '$from', to: '$to')");
            return false;
        } else {
            $email = new Emailnotification("PreorderBillingInvoice", $this->id);
            $email->setSubject($subject);
            $email->setHtmlBody($body);
            $email->setFrom($from, $from_name);
            $email->setTo($to);
            $email->setHeader("X-".MFAPPNAME."-Iid", $this->id);
            $email->addAttachment($pdf_filename, null, $pdf->filename, "application/pdf");
            if($detail_file) {
                $email->addAttachment($detail_file->getFullPath(), null, $detail_file->filename, $detail_file->mimetype);
            }
            $email->send();
            $this->log->info(__METHOD__.": Sending Preorder Invoice ".$this->invoice_number." to $to");
        }

        return true;
    }

    public function getPdfFromDetailCsv() {
        $netowner = $this->getProperty("netowner");
        if(!$netowner || !array_key_exists($netowner->id, TT_PREORDER_BILLING)) {
            return false;
        }
        $netowner_config = TT_PREORDER_BILLING[$netowner->id];

        $csv_file = $this->getProperty("csv");
        $input = fopen($csv_file->getFullPath(), "r");
        if(!$input) return false;

        $bom = "\xef\xbb\xbf";
        if(fgets($input, 4) !== $bom) {
            // BOM not found - rewind pointer to start of file.
            rewind($input);
        }

        $headers = [];
        $positions = [];

        $c = 0;
        $i = 0;
        while($csv = fgetcsv($input, 0, ";")) {
            $i++;

            if($i == 1) {
                foreach($csv as $key => $name) {
                    $headers[$name] = $key;
                }
                continue;
            }

            if(!trim($csv[1])) {
                continue;
            }

            $data = [];
            $data["netzbetreiber"] = trim($csv[$headers["Netzbetreiber"]]);
            $data["rechnum"] = trim($csv[$headers["Rechungsnummer"]]);
            $data["rechdatum"] = (new DateTime(trim($csv[$headers["Rechnungsdatum"]])))->format("d.m.Y");
            $data["netzgebiet"] = trim($csv[$headers["Netzgebiet"]]);
            $data["oaid"] = trim($csv[$headers["OAID"]]);
            $data["extref"] = trim($csv[$headers["Extref"]]);
            $data["bestdatum"] = (new DateTime(trim($csv[$headers["Bestelldatum"]])))->format("d.m.Y");
            $data["von"] = trim($csv[$headers["Periode von"]]);
            $data["bis"] = trim($csv[$headers["Periode bis"]]);
            $data["artnum"] = trim($csv[$headers["Artikelnummer"]]);
            $data["produkt"] = trim($csv[$headers["Produkt"]]);
            $data["anzahl"] = trim($csv[$headers["Anzahl"]]);
            $data["netto"] = trim($csv[$headers["Preis Netto"]]);

            $positions[] = $data;
        }

        if(!count($positions)) {
            return false;
        }

        $invoice_number = $this->invoice_number;

        $variables = [
            "positions" => $positions,
            "netzbetreiber" => $this->getProperty("owner")->getCompanyOrName(),
            "rechnum" => $invoice_number,
        ];

        $pdf = new PdfForm("PreorderBillingInvoice/detail.pdf", $variables);
        $path = $pdf->render("-O landscape");
        if(!$path) return false;


        $filename = "$invoice_number-detail.pdf";
        $subfolder = $netowner_config["subfolder"];

        $new_filepath = MFUPLOAD_FILE_SAVE_PATH."/$subfolder/$filename";
        if(!rename($path, $new_filepath)) {
            unlink($path);
            return false;
        }

        $file = FileModel::create([
            "name" => $filename,
            "filename" => $filename,
            "store_filename" => $filename,
            "orig_filename" => $filename,
            "subfolder" => $subfolder,
            "mimetype" => "application/pdf",
        ]);
        if(!$file->save()) {
            unlink($new_filepath);
            return false;
        }

        $invoice_file = PreorderBillingInvoiceFile::create([
            "invoice_id" => $this->id,
            "file_id" => $file->id,
            "name" => $filename,
        ]);
        if(!$invoice_file->save()) {
            $file->delete();
            //unlink($new_filepath);
            return false;
        }

        return $invoice_file;

        //$pdf->download();

        /*
        $file = FileModel::create([
            "" => "",
        ]);*/


    }

    public function getProperty($name) {
        if($this->$name == null) {

            if($name == "netowner") {
                $netowner = new Address($this->netowner_id);
                if(!$netowner->id) {
                    return false;
                }
                $this->netowner = $netowner;
                return $this->netowner;
            }

            if($name == "owner") {
                $owner = new Address($this->owner_id);
                if(!$owner->id) {
                    return false;
                }
                $this->owner = $owner;
                return $this->owner;
            }

            if($name == "billingaddress") {
                $billingaddress = new Address($this->billingaddress_id);
                if(!$billingaddress->id) {
                    return false;
                }
                $this->billingaddress = $billingaddress;
                return $this->billingaddress;
            }
            
            if($name == "positions") {
                $positions = PreorderBillingInvoiceposition::search(["invoice_id" => $this->id]);
                $this->positions = $positions;
                return $this->positions;
            }

            if($name == "pdf") {
                $ifile = PreorderBillingInvoiceFile::getFirst(["invoice_id" => $this->id, "name" => "%.pdf"]);
                if(!$ifile) return null;

                $file = $ifile->file;
                if(!$file) return null;

                $this->pdf = $file;
                return $this->pdf;
            }

            if($name == "csv") {
                $ifile = PreorderBillingInvoiceFile::getFirst(["invoice_id" => $this->id, "name" => "%.csv"]);
                if(!$ifile) return null;

                $file = $ifile->file;
                if(!$file) return null;

                $this->csv = $file;
                return $this->csv;
            }

            if($name == "detailpdf") {
                // same as csv but in pdf format
                $ifile = PreorderBillingInvoiceFile::getFirst(["invoice_id" => $this->id, "name" => "%-detail.pdf"]);
                if(!$ifile || !$ifile->file || !$ifile->file->id) {
                    $ifile = $this->getPdfFromDetailCsv();
                }

                if(!$ifile || !$ifile->file || !$ifile->file->id) return null;

                $this->detailpdf = $ifile->file;
                return $this->detailpdf;
            }

            if($name == "emailLog") {
                $emaillog = EmailLog::getFirst(["object_type" => "PreorderBillingInvoice", "object_id" => $this->id]);
                if($emaillog) {
                    $this->emailLog = $emaillog;
                }
                return $this->emailLog;
            }

            if($name == "creator") {
                $creator = mfValuecache::singleton()->get("Worker-id-".$this->create_by);
                if($creator) {
                    $this->creator = $creator;
                    return $this->creator;
                }
                $this->creator = new User($this->create_by);

                if(!$this->creator->id) {
                    return null;
                }
                mfValuecache::singleton()->set("Worker-id-".$this->create_by, $this->creator);
                return $this->creator;
            }

            if($name == "editor") {
                $editor = mfValuecache::singleton()->get("Worker-id-".$this->edit_by);
                if($editor) {
                    $this->editor = $editor;
                    return $this->editor;
                }
                $this->editor = new User($this->edit_by);
                if(!$this->editor->id) {
                    return null;
                }
                mfValuecache::singleton()->set("Worker-id-".$this->edit_by, $this->editor);
                return $this->editor;
            }

            $classname = ucfirst($name);
            $idfield = $name . "_id";
            $this->$name = mfValuecache::singleton()->get("mfObjectmodel-$name-" . $this->$idfield);
            if(!$this->$name) {
                $this->$name = new $classname($this->$idfield);
            }

            if($this->$name->id) {
                mfValuecache::singleton()->set("mfObjectmodel-$name-" . $this->$name->id, $this->$name);
                return $this->$name;
            } else {
                return null;
            }
        }

        return $this->$name;

    }

    /********************************
     * Begin static Model functions
     */

    public static function create(Array $data) {
        $model = new PreorderBillingInvoice();

        $table_fields = [
            "netowner_id","invoice_number","invoice_date","preorderbillingcustomer_id","owner_id","billingaddress_id","fibu_account_number","fibu_cost_area",
            "fibu_cost_account", "fibu_revenue_account","fibu_taxcode","tax_text","head_text","company","firstname","lastname","street","zip","city","country","email",
            "uid", "billing_type", "billing_delivery","bank_account_bank","bank_account_owner","bank_account_iban","bank_account_bic","total","total_gross","vatgroup_id",
            "vatrate", "bmd_export_date","date_delivered",
            "create_by","edit_by","create","edit"
        ];

        foreach($data as $field => $value) {
            if(in_array($field, $table_fields)) {
                $model->$field = $value;
            }
        }

        $me = new User();
        $me->loadMe();

        if($model->create_by === null) {
            $model->create_by = $me->id;
        }
        if($model->edit_by === null) {
            $model->edit_by = $me->id;
        }

        return $model;
    }

    public static function getAll() {
        $items = [];

        $db = FronkDB::singleton();

        $res = $db->select("PreorderBillingInvoice", "*", "1 = 1 ORDER BY id");
        if($db->num_rows($res)) {
            while($data = $db->fetch_object($res)) {
                $items[] = new PreorderBillingInvoice($data);
            }
        }
        return $items;

    }

    public static function getFirst($filter) {
        $db = FronkDB::singleton();

        $where = self::getSqlFilter($filter);
        $sql = "SELECT PreorderBillingInvoice.* FROM PreorderBillingInvoice
                WHERE $where 
                ORDER BY id LIMIT 1";

        //mfLoghandler::singleton()->debug($sql);
        $res = $db->query($sql);
        if($db->num_rows($res)) {
            $data = $db->fetch_object($res);
            $item = new PreorderBillingInvoice($data);
            if($item->id) {
                return $item;
            } else {
                return null;
            }
        }
        return null;
    }

    public static function getLast($filter) {
        $db = FronkDB::singleton();

        $where = self::getSqlFilter($filter);

        $sql = "SELECT PreorderBillingInvoice.* FROM PreorderBillingInvoice
                WHERE $where 
                ORDER BY id DESC LIMIT 1";

        mfLoghandler::singleton()->debug($sql);
        $res = $db->query($sql);
        if($db->num_rows($res)) {
            $data = $db->fetch_object($res);
            $item = new PreorderBillingInvoice($data);
            if($item->id) {
                return $item;
            } else {
                return null;
            }
        }
        return null;
    }

    public static function count($filter) {
        $db = FronkDB::singleton();

        $where = self::getSqlFilter($filter);
        $sql = "SELECT COUNT(*) as cnt FROM PreorderBillingInvoice
                WHERE $where";

        //mfLoghandler::singleton()->debug($sql);

        $res = $db->query($sql);
        if($db->num_rows($res)) {
            $data = $db->fetch_object($res);
            return $data->cnt;
        }
        return 0;
    }

    public static function search($filter, $limit = false, $order = false) {
        //var_dump($filter);exit;
        $items = [];

        if(!$order) {
            $order = "id ASC";
        }

        $db = FronkDB::singleton();

        $where = self::getSqlFilter($filter);
        $sql = "SELECT PreorderBillingInvoice.* FROM PreorderBillingInvoice
                WHERE $where
                ORDER BY $order";

        if(is_array($limit) && count($limit)) {
            if(is_numeric($limit['start']) && is_numeric($limit['count'])) {
                $sql .= " LIMIT ".$limit['start'].", ".$limit['count'];
            } elseif(is_numeric($limit['count'])) {
                $sql .= " LIMIT ".$limit['count'];
            }
        }

        mfLoghandler::singleton()->debug($sql);

        $res = $db->query($sql);
        if($db->num_rows($res)) {
            while($data = $db->fetch_object($res)) {
                $items[$data->id] = new PreorderBillingInvoice($data);
            }
        }

        return $items;
    }

    private static function getSqlFilter($filter) {
        $where = "1=1 ";

        if(array_key_exists("invoice_number", $filter)) {
            $invoice_number = $filter['invoice_number'];
            if($invoice_number === null || $invoice_number === false) {
                $where .= " AND (PreorderBillingInvoice.invoice_number IS NULL OR PreorderBillingInvoice.invoice_number=0)";
            } elseif($invoice_number === true) {
                $where .= " AND (PreorderBillingInvoice.invoice_number IS NOT NULL AND PreorderBillingInvoice.invoice_number > 0)";
            } elseif(is_numeric($invoice_number)) {
                $where .= " AND PreorderBillingInvoice.invoice_number=$invoice_number";
            }
        }

        if(array_key_exists("invoice_date", $filter)) {
            $invoice_date = FronkDB::singleton()->escape($filter['invoice_date']);
            if($invoice_date) {
                $where .= " AND PreorderBillingInvoice.invoice_date='$invoice_date'";
            }
        }

        if(array_key_exists("preorderbillingcustomer_id", $filter)) {
            $preorderbillingcustomer_id = $filter['preorderbillingcustomer_id'];
            if(is_numeric($preorderbillingcustomer_id)) {
                $where .= " AND PreorderBillingInvoice.preorderbillingcustomer_id=$preorderbillingcustomer_id";
            }
        }

        if(array_key_exists("netowner_id", $filter)) {
            $netowner_id = $filter['netowner_id'];
            if(is_numeric($netowner_id)) {
                $where .= " AND PreorderBillingInvoice.netowner_id=$netowner_id";
            }
        }

        if(array_key_exists("owner_id", $filter)) {
            $owner_id = $filter['owner_id'];
            if(is_numeric($owner_id)) {
                $where .= " AND PreorderBillingInvoice.owner_id=$owner_id";
            }
        }

        if(array_key_exists("billingaddress_id", $filter)) {
            $billingaddress_id = $filter['billingaddress_id'];
            if(is_numeric($billingaddress_id)) {
                $where .= " AND PreorderBillingInvoice.billingaddress_id=$billingaddress_id";
            }
        }

        if (array_key_exists("company", $filter)) {
            $company = FronkDB::singleton()->escape($filter["company"]);
            if ($company) {
                $where .= " AND company like '%$company%'";
            }
        }

        if (array_key_exists("firstname", $filter)) {
            $firstname = FronkDB::singleton()->escape($filter["firstname"]);
            if ($firstname) {
                $where .= " AND firstname like '%$firstname%'";
            }
        }

        if (array_key_exists("lastname", $filter)) {
            $lastname = FronkDB::singleton()->escape($filter["lastname"]);
            if ($lastname) {
                $where .= " AND lastname like '%$lastname%'";
            }
        }

        if (array_key_exists("mergedName", $filter)) {
            $name = FronkDB::singleton()->escape($filter["mergedName"]);
            if ($name) {
                $where .= " AND (CONCAT(firstname, ' ', lastname) like '%$name%' OR CONCAT(lastname, ' ', firstname) like '%$name%' )";
            }
        }

        if (array_key_exists("street", $filter)) {
            $street = FronkDB::singleton()->escape($filter["street"]);
            if ($street) {
                $where .= " AND street like '%$street%'";
            }
        }

        if (array_key_exists("zip", $filter)) {
            $zip = FronkDB::singleton()->escape($filter["zip"]);
            if ($zip) {
                $where .= " AND zip like '%$zip%'";
            }
        }

        if (array_key_exists("city", $filter)) {
            $city = FronkDB::singleton()->escape($filter["city"]);
            if ($city) {
                $where .= " AND city like '%$city%'";
            }
        }

        if (array_key_exists("country", $filter)) {
            $country = FronkDB::singleton()->escape($filter["country"]);
            if ($country) {
                $where .= " AND country like '%$country%'";
            }
        }

        if (array_key_exists("email", $filter)) {
            $email = FronkDB::singleton()->escape($filter["email"]);
            if ($email) {
                $where .= " AND email like '%$email%'";
            }
        }

        if(array_key_exists("billing_delivery", $filter)) {
            $billing_delivery = FronkDB::singleton()->escape($filter['billing_delivery']);
            if($billing_delivery) {
                $where .= " AND PreorderBillingInvoice.billing_delivery = '$billing_delivery'";
            }
        }

        if(array_key_exists("date_delivered", $filter)) {
            $date_delivered = $filter['date_delivered'];
            if($date_delivered === null || $date_delivered === false) {
                $where .= " AND (PreorderBillingInvoice.date_delivered IS NULL OR PreorderBillingInvoice.date_delivered=0)";
            } elseif($date_delivered === true) {
                $where .= " AND (PreorderBillingInvoice.date_delivered IS NOT NULL AND PreorderBillingInvoice.date_delivered > 0)";
            } elseif(is_numeric($date_delivered)) {
                $where .= " AND PreorderBillingInvoice.date_delivered=$date_delivered";
            }
        }

        if(array_key_exists("bmd_export_date", $filter)) {
            $bmd_export_date = $filter['bmd_export_date'];
            if($bmd_export_date === null || $bmd_export_date === false) {
                $where .= " AND (PreorderBillingInvoice.bmd_export_date IS NULL OR PreorderBillingInvoice.bmd_export_date=0)";
            } elseif($bmd_export_date === true) {
                $where .= " AND (PreorderBillingInvoice.bmd_export_date IS NOT NULL AND PreorderBillingInvoice.bmd_export_date > 0)";
            } elseif(is_numeric($bmd_export_date)) {
                $where .= " AND PreorderBillingInvoice.bmd_export_date=$bmd_export_date";
            }
        }

        if(array_key_exists("add-where", $filter)) {
            $where .= " ".$filter['add-where'];
        }

        //var_dump($filter, $where);exit;
        return $where;
    }

}