<?php

namespace App\Business;

use App\Models\Business\StoreReceivingAccount;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\ValidationException;
use PhpOffice\PhpSpreadsheet\IOFactory;

class StoreReceivingAccountWorkbookImporter
{
    /** @var array<string,list<string>> */
    private const HEADERS = [
        'taobao' => [
            '类型', 'ERP店铺名称', '店铺名称', '店铺状态', '店铺主体', '原店铺主体', '状态',
            '登录账号', '登录密码', '支付密码', '提现路径', '提现账户名称', '支付宝账号',
        ],
        'jd' => [
            '类型', 'ERP店铺名称', '店铺名称', '店铺id', '店铺状态', '店铺主体', '原店铺主体',
            '登录账号', '登录密码', '支付验证方式', '金融账号', '金融密码', '支付验证方式',
            '状态', '提现路径', '提现账户名称', '银行卡账号（后四位）',
        ],
        'douyin' => [
            'ERP店铺名称', '店铺名称', '店铺状态', '店铺主体', '原店铺主体', '状态',
            '登录账号', '登录密码', '支付密码', '提现路径', '提现账户名称', '银行卡账号（后四位）',
        ],
        'pinduoduo' => [
            'ERP店铺名称', '店铺名称', '店铺状态', '店铺主体', '原店铺主体', '状态',
            '登录账号', '登录密码', '支付密码', '提现路径', '提现账户名称', '银行卡账号（后四位）',
        ],
    ];

    public function import(UploadedFile $file, string $tab, ?int $companyId = null): array
    {
        if (! isset(self::HEADERS[$tab])) {
            throw ValidationException::withMessages(['import' => '未知的店铺收款账户页签。']);
        }

        $spreadsheet = IOFactory::load($file->getRealPath());
        $worksheet = $this->worksheet($spreadsheet, $tab);

        if ($worksheet === null) {
            throw ValidationException::withMessages([
                'import' => '未找到“' . $this->sheetTitle($tab) . '”工作表，请使用当前页签的模板。',
            ]);
        }

        $expected = self::HEADERS[$tab];
        $actual = array_map(static fn ($value): string => trim((string) $value), $worksheet->toArray(null, true, false, false)[0] ?? []);

        if ($actual !== $expected) {
            throw ValidationException::withMessages([
                'import' => '“' . $this->sheetTitle($tab) . '”表头不匹配，请先下载当前页签模板。',
            ]);
        }

        $rows = $worksheet->toArray(null, true, false, false);
        $records = [];
        $skipped = 0;

        foreach (array_slice($rows, 1) as $index => $row) {
            $row = array_pad($row, count($expected), null);
            $erpName = trim((string) ($row[array_search('ERP店铺名称', $expected, true)] ?? ''));

            if ($erpName === '') {
                $skipped++;
                continue;
            }

            $records[] = $this->mapRow($tab, $expected, $row);
        }

        $created = 0;
        $updated = 0;
        $companyId ??= (int) (company_id() ?: 1);

        DB::transaction(function () use ($records, $companyId, &$created, &$updated): void {
            foreach ($records as $data) {
                $platform = (string) $data['store_platform'];
                $query = StoreReceivingAccount::withoutGlobalScopes()
                    ->withTrashed()
                    ->where('company_id', $companyId)
                    ->where('store_platform', $platform);

                if (($data['wallet_number'] ?? '') !== '') {
                    $query->where('wallet_number', $data['wallet_number']);
                } else {
                    $query->where('store_name', $data['store_name']);
                }

                $record = $query->first();

                if ($record === null) {
                    $record = new StoreReceivingAccount();
                    $record->fill(['company_id' => $companyId] + $data);
                    $record->save();
                    $created++;
                    continue;
                }

                if ($record->trashed()) {
                    $record->restore();
                }

                $record->fill($data);
                $record->save();
                $updated++;
            }
        });

        return [
            'created' => $created,
            'updated' => $updated,
            'skipped' => $skipped,
            'rows' => count($records),
        ];
    }

    /** @return array<string,list<string>> */
    public static function headers(): array
    {
        return self::HEADERS;
    }

    public static function sheetTitle(string $tab): string
    {
        return match ($tab) {
            'taobao' => '淘宝',
            'jd' => '京东',
            'douyin' => '抖音小店',
            'pinduoduo' => '拼多多',
            default => $tab,
        };
    }

    private function worksheet($spreadsheet, string $tab): ?object
    {
        $title = $this->sheetTitle($tab);

        foreach ($spreadsheet->getWorksheetIterator() as $worksheet) {
            if (trim((string) $worksheet->getTitle()) === $title) {
                return $worksheet;
            }
        }

        return null;
    }

    /** @param list<string> $headers */
    private function mapRow(string $tab, array $headers, array $row): array
    {
        $value = static function (string $header) use ($headers, $row): string {
            $index = array_search($header, $headers, true);

            return $index === false ? '' : trim((string) ($row[$index] ?? ''));
        };

        $platform = $tab === 'taobao' || $tab === 'jd' ? $value('类型') : ($tab === 'douyin' ? '抖音' : '拼多多');
        $allowedPlatforms = TableRegistry::tabValues('fund-management', 'store-receiving-accounts', $tab);
        if (! in_array($platform, $allowedPlatforms, true)) {
            throw ValidationException::withMessages([
                'import' => '第 ' . (count($row) > 0 ? '数据' : '') . '行的平台类型不属于当前页签，请检查“类型”列。',
            ]);
        }
        $storeId = $value('店铺id');

        $data = [
            'store_platform' => $platform,
            'store_name' => $value('ERP店铺名称'),
            'wallet_number' => $storeId,
            'store_entity_name' => $value('店铺主体'),
            'login_account' => $value('登录账号'),
            'login_password' => $value('登录密码'),
            'receiving_method' => $value('提现路径') ?: '银行卡',
            'receiving_account_name' => $value('提现账户名称'),
            'alipay_or_bank_account' => $value('支付宝账号') ?: $value('银行卡账号（后四位）'),
            'opening_bank' => null,
            'erp_store_name' => $value('ERP店铺名称'),
            'shop_name' => $value('店铺名称'),
            'store_status' => $value('店铺状态'),
            'original_store_entity' => $value('原店铺主体'),
            'account_status' => $value('状态'),
            'payment_password' => $value('支付密码'),
            'payment_verification_method' => $value('支付验证方式'),
            'financial_account' => $value('金融账号'),
            'financial_password' => $value('金融密码'),
            'payment_verification_method_secondary' => $this->valueAt($headers, $row, '支付验证方式', 1),
            'bank_card_last_four' => $value('银行卡账号（后四位）'),
            'store_id' => $storeId,
            'source_platform' => $platform,
        ];

        return array_filter($data, static fn ($item): bool => $item !== null);
    }

    /** @param list<string> $headers */
    private function valueAt(array $headers, array $row, string $header, int $occurrence): string
    {
        $found = 0;

        foreach ($headers as $index => $value) {
            if ($value !== $header) {
                continue;
            }

            if ($found++ === $occurrence) {
                return trim((string) ($row[$index] ?? ''));
            }
        }

        return '';
    }
}