<?php

namespace App\Libraries;

class LabelGenerator
{
    public function render($formatName, $view, $data)
    {
        require_once APPPATH . 'ThirdParty/FPDF/fpdf.php';

        $start = $_POST['start_label'] ?? 1;
        $pos = 1;

        $formats = config('LabelFormats');
        $f = $formats->formats[$formatName];

        $pdf = new \App\Libraries\Pdf\MyFPDF('P', 'mm', $f['page']);
        $pdf->SetAutoPageBreak(false);

        $i = 0;
        $total = count($data);

        while ($i < $total) {

            $pdf->AddPage();

            for ($row = 0; $row < $f['rows']; $row++) {

                for ($col = 0; $col < $f['cols']; $col++) {

                    $x = $f['marginLeft'] + ($col * ($f['width'] + $f['gapX']));
                    $y = $f['marginTop'] + ($row * ($f['height'] + $f['gapY']));

                    if ($pos < $start) {
                        $pos++;
                        continue;
                    }

                    if ($i >= $total) {
                        break 3;
                    }

                    $pdf->SetXY($x, $y);

                    extract(array_merge($data[$i], [
                        'pdf' => $pdf,
                        'x'   => $x,
                        'y'   => $y,
                        'f'   => $f,
                    ]));

                    require APPPATH . 'Views/' . $view . '.php';

                    $i++;
                    $pos++;
                }
            }
        }

        $pdf->Output('I', 'labels.pdf');
        exit;
    }
}