<?php

namespace App\Exports;

use App\Models\BillModel;
use Illuminate\Support\Collection;
use Maatwebsite\Excel\Concerns\WithMultipleSheets;

/**
 * 门店账单批量导出：同一门店的账单数据合并为一张表，不同门店拆分为多个工作表
 */
class BillBatchExport implements WithMultipleSheets
{
    /**
     * @param Collection<int, BillModel> $bills 导出账单（with store）
     */
    public function __construct(private readonly Collection $bills)
    {
    }

    /**
     * @return array<int, BillExport>
     */
    public function sheets(): array
    {
        $usedNames = [];
        $sheets = [];
        foreach ($this->bills->groupBy('store_id') as $storeBills) {
            $store = $storeBills->first()->store;
            $storeId = (int) $storeBills->first()->store_id;
            $sheetTitle = SheetName::make($store->name ?? ('门店#' . $storeId), $storeId, $usedNames);
            $sheets[] = new BillExport($storeBills->values(), 0, $sheetTitle);
        }

        return $sheets;
    }
}