<?php

namespace Modules\EcommerceFinance\Services;

use Illuminate\Validation\ValidationException;

/** 按字段定义校验并整理按表维护/导入的字段值。 */
class PayablesFieldNormalizer
{
    /** @param  array<string,array{label:string,type:string}>  $fields */
    public function normalize(array $fields, array $input): array
    {
        $values = [];

        foreach ($fields as $field => $definition) {
            if (! array_key_exists($field, $input)) {
                continue;
            }

            $value = $input[$field];
            if ($value === null || trim((string) $value) === '') {
                $values[$field] = null;
                continue;
            }

            if ($definition['type'] === 'number') {
                $number = str_replace([',', '，', '￥', '¥'], '', trim((string) $value));
                if (preg_match('/^-?(?:\d+(?:\.\d{1,4})?|\.\d{1,4})$/', $number) !== 1
                    || bccomp(ltrim($number, '-'), '9999999999999999.9999', 4) === 1) {
                    throw ValidationException::withMessages([
                        $field => $definition['label'] . '必须是最多 4 位小数的有效数字。',
                    ]);
                }
                $values[$field] = $number;
                continue;
            }

            $text = trim((string) $value);
            if (mb_strlen($text) > 5000) {
                throw ValidationException::withMessages([$field => $definition['label'] . '内容过长。']);
            }
            if ($definition['type'] === 'date' && preg_match('/^\d{4}-\d{2}-\d{2}$/', $text) !== 1) {
                throw ValidationException::withMessages([$field => $definition['label'] . '日期格式无效。']);
            }
            if ($definition['type'] === 'month' && preg_match('/^\d{4}-\d{2}$/', $text) !== 1) {
                throw ValidationException::withMessages([$field => $definition['label'] . '月份格式无效。']);
            }
            $values[$field] = $text;
        }

        if ($values === []) {
            throw ValidationException::withMessages(['values' => '没有可保存的字段。']);
        }

        return $values;
    }
}