<?php

namespace App\Business;

use DateTimeImmutable;
use DateTimeInterface;
use InvalidArgumentException;
use PhpOffice\PhpSpreadsheet\Shared\Date as ExcelDate;

/**
 * 店铺违规信息预警：上游抓取数据与导入文件到统一表头的映射。
 */
class StoreViolationMapper
{
    public function platformForSourceValue(mixed $value): ?string
    {
        $normalized = mb_strtolower(trim((string) $value));
        if ($normalized === '') {
            return null;
        }

        foreach ((array) config('store_violations.platforms', []) as $slug => $platform) {
            if ($normalized === $slug) {
                return $slug;
            }

            foreach ($platform['source_values'] ?? [] as $sourceValue) {
                if ($normalized === mb_strtolower(trim((string) $sourceValue))) {
                    return $slug;
                }
            }
        }

        return null;
    }

    public function categoryForContent(?string $content): string
    {
        $content = trim((string) $content);
        if ($content === '') {
            return (string) config('store_violations.default_category', '其他');
        }

        foreach ((array) config('store_violations.category_rules', []) as $category => $keywords) {
            foreach ((array) $keywords as $keyword) {
                if ($keyword !== '' && mb_stripos($content, (string) $keyword) !== false) {
                    return (string) $category;
                }
            }
        }

        return (string) config('store_violations.default_category', '其他');
    }

    /**
     * 上游抓取行（rpt.crawl_shop_violation）→ 统一字段。
     *
     * @param  array<string,mixed>  $row
     * @return array<string,mixed>|null 平台无法识别时返回 null
     */
    public function mapCrawlRow(array $row): ?array
    {
        $platform = $this->platformForSourceValue($row['platform'] ?? null);
        if ($platform === null) {
            return null;
        }

        $content = trim((string) ($row['violation_content'] ?? ''));

        return [
            'platform' => $platform,
            'shop_name' => mb_substr(trim((string) ($row['shop_name'] ?? '')), 0, 191),
            'violation_type' => $content === '' ? null : mb_substr($content, 0, 500),
            'violation_category' => $this->categoryForContent($content),
            // 上游视图补齐这两列后由同步命令自动带出（见 SyncStoreViolations 的列探测）。
            'violation_reason' => $this->normalizeLabel($row['violation_reason'] ?? null, 500),
            'disposition' => $this->normalizeLabel($row['disposition'] ?? null, 500),
            'violation_no' => mb_substr(trim((string) ($row['violation_no'] ?? '')), 0, 100),
            'violation_date' => $this->normalizeDate($row['violation_date'] ?? null),
            'status' => $this->normalizeLabel($row['status'] ?? null, 64),
            'appeal_deadline' => $this->normalizeDate($row['deadline'] ?? null),
            'window_name' => $this->normalizeLabel($row['window_name'] ?? null, 191),
            'crawl_date' => $this->normalizeDate($row['crawl_date'] ?? null),
            'source' => 'crawl',
        ];
    }

    public function normalizeDate(mixed $value): ?string
    {
        if ($value === null || $value === '') {
            return null;
        }

        if ($value instanceof DateTimeInterface) {
            return $value->format('Y-m-d');
        }

        if (is_numeric($value)) {
            $number = (float) $value;
            if ($number >= 20000 && $number <= 80000) {
                return ExcelDate::excelToDateTimeObject($number)->format('Y-m-d');
            }
        }

        $text = trim((string) $value);
        if ($text === '' || in_array($text, ['-', '—', '无'], true)) {
            return null;
        }

        $text = str_replace(['年', '月'], '-', str_replace('日', '', $text));
        $text = str_replace(['/', '.'], '-', $text);
        $text = trim(preg_replace('/\s+/', ' ', $text) ?? $text);

        try {
            return (new DateTimeImmutable($text))->format('Y-m-d');
        } catch (\Throwable) {
            throw new InvalidArgumentException('无法识别的日期：' . $value);
        }
    }

    public function normalizePoints(mixed $value): ?float
    {
        if ($value === null || $value === '') {
            return null;
        }

        if (is_numeric($value)) {
            return (float) $value;
        }

        $text = trim((string) $value);
        if ($text === '' || in_array($text, ['-', '—', '无', '不扣分'], true)) {
            return null;
        }

        $text = preg_replace('/(分|点|个?扣|扣除)/u', '', $text) ?? $text;
        $text = trim($text);
        if ($text === '' || ! is_numeric($text)) {
            throw new InvalidArgumentException('无法识别的扣分：' . $value);
        }

        return (float) $text;
    }

    private function normalizeLabel(mixed $value, int $limit): ?string
    {
        $text = trim((string) $value);

        return $text === '' ? null : mb_substr($text, 0, $limit);
    }
}