<?php

namespace App\Exports;

use App\Models\ProductSpec;
use Illuminate\Support\Collection;
use Maatwebsite\Excel\Concerns\FromQuery;
use Maatwebsite\Excel\Concerns\WithHeadings;

class ProductSpecExport implements FromQuery, WithHeadings
{
	private int $product_id;

	public function __construct(int $product_id)
	{
		$this->product_id = $product_id;
	}

	/**
	 * @return Collection
	 */
	public function query()
	{
		return ProductSpec::where([
			['product_id', '=', $this->product_id],
			['date', '>=', date('Y-m-d')],
		])->orderBy('name')->orderBy('date');
	}

	public function prepareRows($rows)
	{
		return $rows->transform(function ($row) {
			return [
				'规格名称' => $row['name'],
				'日期' => $row['date'],
				'库存' => $row['stock'],
				'市场价' => $row['original_price'],
				'销售价' => $row['price'],
				'成本价' => $row['cost_price'],
			];
		});
	}

	public function headings(): array
	{
		return [
			'规格名称', '日期', '库存', '市场价', '销售价', '成本价',
		];
	}

	public function columnFormats(): array
	{
		return [
			'B' => 'yyyy/m/d',
		];
	}
}