<?php

declare(strict_types=1);

namespace plugin\produce\app\service\admin;

use core\base\BaseService;
use PhpOffice\PhpSpreadsheet\IOFactory;
use plugin\produce\app\dao\MaterialDao;
use plugin\produce\app\model\Material;
use plugin\produce\app\model\MaterialCategory;

class MaterialService extends BaseService
{
    public function __construct(MaterialDao $dao)
    {
        $this->dao = $dao;
    }

    /**
     * 从 Excel 导入物料；首行必须为：分类、商品编码、商品名称。
     * 相同商品编码会更新分类和名称，以便重复导入。
     */
    public function importFromExcel(string $filePath): array
    {
        $sheet = IOFactory::load($filePath)->getActiveSheet();
        $rows = $sheet->toArray('', true, true, false);
        if (count($rows) < 2) {
            throw new \InvalidArgumentException('导入文件至少应包含表头和一条物料数据');
        }

        $headers = array_map(static fn ($value) => trim((string) $value), $rows[0]);
        $indexes = array_flip($headers);
        foreach (['分类', '商品编码', '商品名称'] as $header) {
            if (!array_key_exists($header, $indexes)) {
                throw new \InvalidArgumentException('导入表头必须包含：分类、商品编码、商品名称');
            }
        }

        return $this->transaction(function () use ($rows, $indexes) {
            $created = 0;
            $updated = 0;
            $categories = [];

            foreach (array_slice($rows, 1) as $rowNumber => $row) {
                $categoryName = trim((string) ($row[$indexes['分类']] ?? ''));
                $productCode = trim((string) ($row[$indexes['商品编码']] ?? ''));
                $productName = trim((string) ($row[$indexes['商品名称']] ?? ''));
                if ($categoryName === '' && $productCode === '' && $productName === '') {
                    continue;
                }
                if ($categoryName === '' || $productCode === '' || $productName === '') {
                    throw new \InvalidArgumentException('第 ' . ($rowNumber + 2) . ' 行的分类、商品编码、商品名称均不能为空');
                }

                $category = $categories[$categoryName] ?? null;
                if (!$category) {
                    $category = MaterialCategory::query()->withTrashed()->where('category_name', $categoryName)->first();
                    if ($category?->trashed()) {
                        $category->restore();
                    }
                    $category ??= MaterialCategory::query()->create(['category_name' => $categoryName]);
                    $categories[$categoryName] = $category;
                }
                $material = Material::query()->withTrashed()->where('product_code', $productCode)->first();
                if ($material) {
                    if ($material->trashed()) {
                        $material->restore();
                    }
                    $material->fill(['category_id' => $category->id, 'product_name' => $productName])->save();
                    $updated++;
                    continue;
                }

                Material::query()->create([
                    'category_id' => $category->id,
                    'product_code' => $productCode,
                    'product_name' => $productName,
                ]);
                $created++;
            }

            return ['created' => $created, 'updated' => $updated];
        });
    }
}