<?php

namespace Modules\EcommerceFinance\Services;

use Illuminate\Validation\ValidationException;
use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Shared\Date as ExcelDate;

class AccessoryReshipCourierImporter
{
    public function read(string $path): array
    {
        $reader = IOFactory::createReader('Xlsx');
        $info = $reader->listWorksheetInfo($path);
        if (count($info) !== 1 || $info[0]['totalRows'] > 5001 || $info[0]['totalColumns'] > 20) {
            throw ValidationException::withMessages(['file' => '请使用单工作表、最多5000条配置的Excel文件。']);
        }
        $book = $reader->load($path);
        try {
            $sheet = $book->getSheet(0);
            $headers = [];
            for ($column = 1; $column <= $info[0]['totalColumns']; $column++) {
                $label = trim((string) $sheet->getCell([$column, 1])->getValue());
                $label = str_replace(['（', '）', '％', ' '], ['(', ')', '%', ''], $label);
                $headers[$label] = $column;
            }
            $rateColumn = $headers['扣款比率(%)'] ?? $headers['扣款比例(%)'] ?? null;
            foreach (['快递代码', '快递公司', '创建时间', '创建人'] as $header) {
                if (!isset($headers[$header])) {
                    throw ValidationException::withMessages(['file' => '缺少列：' . $header]);
                }
            }
            if ($rateColumn === null) {
                throw ValidationException::withMessages(['file' => '缺少列：扣款比率（%）']);
            }
            $rows = [];
            $codes = [];
            $names = [];
            for ($number = 2; $number <= $sheet->getHighestDataRow(); $number++) {
                $values = [];
                foreach (['courier_code' => $headers['快递代码'], 'courier_name' => $headers['快递公司'], 'source_created_at' => $headers['创建时间'], 'creator' => $headers['创建人'], 'rate' => $rateColumn] as $key => $column) {
                    $cell = $sheet->getCell([$column, $number]);
                    if ($cell->getDataType() === 'f') {
                        throw ValidationException::withMessages(['file' => "第{$number}行含公式，请使用实际配置值。"]);
                    }
                    $values[$key] = trim((string) $cell->getFormattedValue());
                    if ($key === 'source_created_at' && is_numeric($cell->getValue()) && ExcelDate::isDateTime($cell)) {
                        $values[$key] = ExcelDate::excelToDateTimeObject($cell->getValue())->format('Y-m-d H:i:s');
                    }
                }
                if (implode('', $values) === '') {
                    continue;
                }
                if ($values['courier_code'] === '' || mb_strlen($values['courier_code']) > 64 || $values['courier_name'] === '' || mb_strlen($values['courier_name']) > 191 || $values['creator'] === '' || mb_strlen($values['creator']) > 191) {
                    throw ValidationException::withMessages(['file' => "第{$number}行快递代码、名称或创建人为空或超长。"]);
                }
                if (isset($codes[mb_strtolower($values['courier_code'])]) || isset($names[mb_strtolower($values['courier_name'])])) {
                    throw ValidationException::withMessages(['file' => "第{$number}行快递代码或名称重复。"]);
                }
                $codes[mb_strtolower($values['courier_code'])] = true;
                $names[mb_strtolower($values['courier_name'])] = true;
                $rate = AccessoryReshipRateCalculator::basisPoints($values['rate']);
                $date = $values['source_created_at'];
                if ($date !== '' && (!preg_match('/^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/', $date) || !checkdate((int) substr($date, 5, 2), (int) substr($date, 8, 2), (int) substr($date, 0, 4)) || substr($date, 11, 2) > '23' || substr($date, 14, 2) > '59' || substr($date, 17, 2) > '59')) {
                    throw ValidationException::withMessages(['file' => "第{$number}行创建时间无效。"]);
                }
                unset($values['rate']);
                $values['source_created_at'] = $date === '' ? null : $date;
                $values['rate_basis_points'] = $rate;
                $rows[] = $values;
            }
            if ($rows === []) {
                throw ValidationException::withMessages(['file' => '配置表没有有效记录。']);
            }
            return $rows;
        } finally {
            $book->disconnectWorksheets();
        }
    }
}