<?php

namespace App\Services\Reports\Export;

use App\Exports\Sheets\ArraySheetExport;
use App\Services\Reports\ReportPayload;
use App\Services\Reports\ReportSection;
use Maatwebsite\Excel\Concerns\WithMultipleSheets;

class ReportExcelExport implements WithMultipleSheets
{
    public function __construct(private readonly ReportPayload $payload) {}

    public function sheets(): array
    {
        $sheets = [
            new ArraySheetExport('Сводка', $this->metaRows()),
        ];

        foreach ($this->payload->sections as $section) {
            $sheets[] = new ArraySheetExport($this->sheetTitle($section->title), $this->sectionRows($section));
        }

        return $sheets;
    }

    private function metaRows(): array
    {
        $rows = [['Показатель', 'Значение']];

        foreach ($this->payload->meta as $label => $value) {
            $rows[] = [$label, $value];
        }

        return $rows;
    }

    private function sectionRows(ReportSection $section): array
    {
        $rows = [array_values($section->columns)];

        if (empty($section->rows)) {
            $rows[] = ['Нет данных за выбранный период'];
        }

        foreach ($section->rows as $row) {
            $line = [];
            foreach (array_keys($section->columns) as $key) {
                $line[] = $row[$key] ?? '';
            }
            $rows[] = $line;
        }

        return $rows;
    }

    private function sheetTitle(string $title): string
    {
        // Excel ограничивает название листа 31 символом и запрещает символы \/?*[]:
        return mb_substr(preg_replace('/[\\\\\/\?\*\[\]:]/', ' ', $title), 0, 31);
    }
}