<?php

namespace App\Services\Admin;

use Carbon\Carbon;
use App\Models\AdminUser;
use Illuminate\Support\Str;
use App\Models\ReconcileJob;
use Illuminate\Http\Request;
use App\Models\ReconcileItem;
use App\Services\AuditLogger;
use Illuminate\Support\Facades\DB;

/**
 * 对账任务：落库 `reconcile_jobs` / `reconcile_items`（阶段 7；差异引擎可后续替换）。
 */
final class AdminReconcileJobService
{
    /**
     * @param  list<array{side_a_ref?: ?string, side_b_ref?: ?string, difference_amount?: int, status?: string}>|null  $items
     */
    public function createJob(
        AdminUser $admin,
        Request $request,
        string $reconcileType,
        ?Carbon $periodStart,
        ?Carbon $periodEnd,
        ?array $items,
    ): ReconcileJob {
        return DB::transaction(function () use ($admin, $request, $reconcileType, $periodStart, $periodEnd, $items): ReconcileJob {
            $jobNo = 'REC'.now()->format('YmdHis').strtoupper(Str::random(4));

            $job = ReconcileJob::query()->create([
                'job_no' => $jobNo,
                'admin_user_id' => (int) $admin->getKey(),
                'reconcile_type' => $reconcileType,
                'status' => 'completed',
                'period_start' => $periodStart,
                'period_end' => $periodEnd,
                'summary_json' => null,
                'finished_at' => now(),
            ]);

            $mismatch = 0;
            foreach ($items ?? [] as $row) {
                ReconcileItem::query()->create([
                    'reconcile_job_id' => (int) $job->getKey(),
                    'side_a_ref' => $row['side_a_ref'] ?? null,
                    'side_b_ref' => $row['side_b_ref'] ?? null,
                    'difference_amount' => (int) ($row['difference_amount'] ?? 0),
                    'status' => (string) ($row['status'] ?? 'mismatch'),
                    'resolved_at' => null,
                ]);
                if (($row['status'] ?? 'mismatch') === 'mismatch') {
                    $mismatch++;
                }
            }

            $job->forceFill([
                'summary_json' => [
                    'item_count' => count($items ?? []),
                    'mismatch_count' => $mismatch,
                ],
            ])->save();

            AuditLogger::recordForAdmin(
                $admin,
                $request,
                'reconcile_jobs',
                'create',
                'reconcile_job',
                (string) $job->getKey(),
                null,
                [
                    'job_no' => $jobNo,
                    'reconcile_type' => $reconcileType,
                    'item_count' => count($items ?? []),
                ],
            );

            return $job->fresh();
        });
    }
}