<?php

namespace App\Http\Controllers\Business;

use Illuminate\Routing\Controller;
use App\Utilities\FinanceLedgerAccess;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Modules\EcommerceFinance\Services\FinanceLedgerCalculator;

class FinanceLedger extends Controller
{
    public function updateMapping(Request $request, int $id, FinanceLedgerCalculator $calculator): JsonResponse
    {
        abort_unless(FinanceLedgerAccess::canEditMapping(user()), 403, '只有财务台账管理员可以修改账户映射。');

        $data = $request->validate([
            'account_short' => ['nullable', 'string', 'max:100'],
        ]);

        $account = trim((string) ($data['account_short'] ?? ''));
        $connection = DB::connection((string) config('upstream_mirrors.connection', 'business_mirror'));
        $row = $connection->table('fin_account_map')->where('id', $id)->first();
        abort_if($row === null, 404);

        if ($account !== '') {
            $exists = $connection->table('fin_accounts')->where('account_short', $account)->exists();
            abort_unless($exists, 422, '账户简称不存在，请从账户总表中选择。');
        }

        $old = (string) ($row->account_short ?? '');
        $connection->table('fin_account_map')->where('id', $id)->update([
            'account_short' => $account !== '' ? $account : null,
            'updated_by' => (string) user()->name,
            'updated_at' => now(),
        ]);
        $connection->table('fin_account_map_events')->insert([
            'source' => (string) $row->source,
            'source_value' => (string) $row->source_value,
            'old_account_short' => $old !== '' ? $old : null,
            'new_account_short' => $account !== '' ? $account : null,
            'user_id' => (int) user()->id,
            'user_name' => (string) user()->name,
            'created_at' => now(),
        ]);

        if ($request->boolean('recalculate', true)) {
            $calculator->recalculate();
        }

        $mapped = $connection->table('fin_account_map')
            ->whereNotNull('account_short')->where('account_short', '<>', '')->count();

        return response()->json([
            'ok' => true,
            'account_short' => $account,
            'mapped' => $mapped,
            'total' => $connection->table('fin_account_map')->count(),
        ], 200, ['Cache-Control' => 'private, no-store']);
    }
}