<?php

namespace Modules\EcommerceFinance\Services;

/** 配件只处理第一个条码；成品逐个完整条码匹配。金额使用分，避免浮点累计。 */
class AccessoryReshipMatcher
{
    public const WAREHOUSE = '常州简尚家居有限公司';

    public static function barcode(string $value): string
    {
        $first = trim(explode(',', $value)[0]);
        $position = strrpos($first, '-');
        return $position === false ? $first : substr($first, 0, $position);
    }

    public static function cents(mixed $value): ?int
    {
        if (!preg_match('/^\d+(?:\.\d+)?$/', trim((string) $value))) {
            return null;
        }
        [$whole, $decimal] = array_pad(explode('.', trim((string) $value), 2), 2, '');
        return (int) $whole * 100 + (int) substr(str_pad($decimal, 2, '0'), 0, 2) + (strlen($decimal) > 2 && (int) $decimal[2] >= 5 ? 1 : 0);
    }

    public function match(array $accessories, iterable $originals): array
    {
        $index = [];
        foreach ($originals as $original) {
            if (trim((string) ($original['warehouse_name'] ?? '')) === self::WAREHOUSE || trim((string) ($original['express_no'] ?? '')) === '') continue;
            $trade = trim((string) ($original['trade_no'] ?? ''));
            if ($trade === '') continue;
            foreach (explode(',', (string) ($original['barcode'] ?? '')) as $barcode) {
                $barcode = trim($barcode);
                if ($barcode === '') continue;
                $key = json_encode([$trade, $barcode]);
                $identity = json_encode([$original['express_no'], $original['express_name1'] ?? '', substr((string) $original['ship_time'], 0, 7)]);
                $index[$key][$identity] = [
                    'express_no' => $original['express_no'],
                    'courier' => ($original['express_name1'] ?? '') ?: ($original['express_name2'] ?? ''),
                    'month' => substr((string) $original['ship_time'], 0, 7),
                ];
            }
        }
        $result = [];
        foreach ($accessories as $row) {
            $barcode = self::barcode((string) ($row['barcode'] ?? ''));
            $trade = trim((string) ($row['trade_no'] ?? ''));
            $matches = ($barcode !== '' && $trade !== '') ? array_values($index[json_encode([$trade, $barcode])] ?? []) : [];
            $row['normalized_barcode'] = $barcode;
            $row['matches'] = $matches;
            $row['status'] = $matches === [] ? 'unmatched' : 'matched';
            $row['freight_cents'] = self::cents($row['freight'] ?? null);
            // 多候选仍属于可扣款；保持一条补发记录，运费不随候选数量放大。
            $row['deduction_cents'] = $matches === [] ? 0 : $row['freight_cents'];
            $result[] = $row;
        }
        return $result;
    }
}