<?php

namespace NoccyLabs\Glabels;

use SimpleXMLElement;

class LabelMerger
{
    /** @var GlabelsLabel $label */
    private $label;
    /** @var array $rows */
    private $rows = [];

    private $fields = [];

    public function __construct(GLabelsLabel $label)
    {
        $this->label = $label;
        try {
            $this->fields = $label->getMergeFields();
        } catch (\Exception $e) {
            $this->fields = [];
        }
    }

    public function getSupportedFields()
    {
        return $this->fields;
    }

    public function addRow(array $data)
    {
        if (count($this->fields) > 0) {
            $row = [];
            foreach ($this->fields as $field) {
                $row[] = array_key_exists($field, $data)?$data[$field]:null;
            }
            $this->rows[] = $row;
        } else {
            $this->rows[] = $data;
        }
    }

    public function mergeToPdf(string $output)
    {
        $tempfile = sprintf("/tmp/%s.tmp", uniqid("php_glabels_"));

        $fd = fopen($tempfile, "w");
        if (count($this->fields)>0) {
            fputcsv($fd, $this->fields);
        } else {
            fputcsv($fd, array_keys(reset($this->rows)));
        }
        foreach ($this->rows as $row) {
            fputcsv($fd, $row);
        }
        fclose($fd);

        $filename = $this->label->getFilename();
        $mergeCmdline = sprintf(
            "glabels-3-batch -i %s -o %s %s", 
            escapeshellarg($tempfile),
            escapeshellarg($output),
            escapeshellarg($filename)
        );

        file_put_contents("/tmp/label.cmd", $mergeCmdline);

        exec($mergeCmdline, $out, $ret);
        if ($ret != 0) {
            throw new GlabelsException("Merge failed");
        }

        unlink($tempfile);

        /*
        $template = $this->label->getTemplateInformation();

        $args = [
            "-density 300",
            escapeshellarg($tempout)
        ];
        if ($template['rotate']) {
            $args[] = "-rotate 270";
        }
        $args[] = escapeshellarg($output);

        $convertCmdline = sprintf("convert %s", join(" ",$args));

        echo "\$ ".$convertCmdline."\n";

        exec($convertCmdline, $out, $ret);

        if ($ret != 0) {
            throw GlabelsException::ConvertCommandFailed();
        }

        unlink($tempout);
        */
    }

}