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<?php

namespace App\Exports;

use App\Models\Country;
use App\Models\Statement;
use Maatwebsite\Excel\Concerns\FromArray;
use Maatwebsite\Excel\Concerns\WithHeadings;

class NetPromoterExport implements FromArray, WithHeadings
{
    private array $data;

private Country $country;

private ?Statement $statement;

public function __construct(array $data, Country $country, ?Statement $statement = null)
    {
        $this->data = $data['data'];
        $this->country = $country;
        $this->statement = $statement;
    }

public function array(): array
    {
        $rows = [];

foreach ($this->data['datasets'] as $dataset) {
            $row = [];
            $row[] = $this->country->name;
            $row[] = $dataset['label'];
            if ($this->statement) {
                $row[] = $this->statement->text;
            }
            foreach ($dataset['data'] as $waveValue) {
                $row[] = (string) $waveValue['y'] ?? null;
                $row[] = (string) $waveValue['n'] ?? null;
            }

$rows[] = $row;
        }

return $rows;
    }

public function headings(): array
    {
        foreach ($this->data['labels'] as $i => $label) {
            $mergedArray[] = $label.' (in %)';
            $mergedArray[] = $label.' (n)';
        }

if ($this->statement) {
            return array_merge(['Country', 'Brand', 'Statement'], $mergedArray);
        }

return array_merge(['Country', 'Brand'], $mergedArray);
    }
}