<?php

namespace Modules\EcommerceFinance\Services;

use App\Models\Auth\User;
use Illuminate\Support\Facades\DB;

/**
 * 按店铺台账批量建立“店铺提现”来源值到账户简称的映射。
 *
 * 只处理店铺名称完全一致、回款账户简称存在于账户总表的未映射记录，
 * 其余来源值保留人工确认。
 */
class FinanceLedgerShopMappingBulk
{
    public function preview(): array
    {
        $connection = $this->connection();
        $shopAccounts = $connection->table('fin_shops')
            ->whereNotNull('account_short')
            ->where('account_short', '<>', '')
            ->where('account_short', '<>', '/')
            ->pluck('account_short', 'shop_name');
        $masterAccounts = array_fill_keys(
            $connection->table('fin_accounts')->distinct()->pluck('account_short')->all(),
            true,
        );
        $rows = $connection->table('fin_account_map')
            ->where('source', 'shop')
            ->where(function ($query): void {
                $query->whereNull('account_short')->orWhere('account_short', '');
            })
            ->orderBy('source_value')
            ->get(['id', 'source_value']);

        $candidates = [];
        $unmatched = [];
        foreach ($rows as $row) {
            $sourceValue = trim((string) $row->source_value);
            $accountShort = trim((string) ($shopAccounts[$sourceValue] ?? ''));
            if ($accountShort === '' || ! isset($masterAccounts[$accountShort])) {
                $unmatched[] = $sourceValue;
                continue;
            }

            $candidates[] = [
                'id' => (int) $row->id,
                'source_value' => $sourceValue,
                'account_short' => $accountShort,
            ];
        }

        return [
            'total' => $rows->count(),
            'matched' => count($candidates),
            'unmatched' => count($unmatched),
            'candidates' => $candidates,
            'unmatched_values' => $unmatched,
        ];
    }

    public function apply(?User $user = null): array
    {
        $preview = $this->preview();
        $connection = $this->connection();
        $userName = (string) ($user?->name ?? '');
        $userId = (int) ($user?->id ?? 0);
        $now = now();
        $mapped = 0;

        if ($preview['candidates'] !== []) {
            $connection->transaction(function () use ($connection, $preview, $userName, $userId, $now, &$mapped): void {
                foreach ($preview['candidates'] as $candidate) {
                    $updated = $connection->table('fin_account_map')
                        ->where('id', $candidate['id'])
                        ->where(function ($query): void {
                            $query->whereNull('account_short')->orWhere('account_short', '');
                        })
                        ->update([
                            'account_short' => $candidate['account_short'],
                            'updated_by' => $userName,
                            'updated_at' => $now,
                        ]);
                    if ($updated !== 1) {
                        continue;
                    }

                    $connection->table('fin_account_map_events')->insert([
                        'source' => 'shop',
                        'source_value' => $candidate['source_value'],
                        'old_account_short' => null,
                        'new_account_short' => $candidate['account_short'],
                        'user_id' => $userId,
                        'user_name' => $userName,
                        'created_at' => $now,
                    ]);
                    $mapped++;
                }
            });
        }

        if ($mapped > 0) {
            app(FinanceLedgerCalculator::class)->recalculate();
        }

        return [
            'total' => $preview['total'],
            'mapped' => $mapped,
            'unmatched' => $preview['unmatched'],
        ];
    }

    private function connection()
    {
        return DB::connection((string) config('upstream_mirrors.connection', 'business_mirror'));
    }
}