<?php

namespace App\Services;

use App\Models\Department;
use App\Models\Feedback;
use App\Models\TicketTransferLog;
use App\Models\User;
use Illuminate\Validation\ValidationException;

class TransferService
{
    /**
     * Transfer a feedback to another department.
     */
    public function transfer(
        Feedback $feedback,
        Department $toDepartment,
        string $reason,
        User $sender,
        ?int $newHandlerId = null,
    ): TicketTransferLog {
        if (empty(trim($reason))) {
            throw ValidationException::withMessages([
                'reason' => __('Vui lòng nhập lý do chuyển tiếp.'),
            ]);
        }

        $fromDepartmentId = $feedback->current_department_id;

        $log = TicketTransferLog::create([
            'feedback_id' => $feedback->id,
            'from_department_id' => $fromDepartmentId,
            'to_department_id' => $toDepartment->id,
            'sender_id' => $sender->id,
            'reason' => $reason,
        ]);

        $feedback->update([
            'current_department_id' => $toDepartment->id,
            'assigned_to' => $newHandlerId ?? $toDepartment->manager_id ?? null,
        ]);

        $this->notifyDepartmentManager($toDepartment, $feedback, $log, $sender);

        return $log;
    }

    protected function notifyDepartmentManager(Department $department, Feedback $feedback, TicketTransferLog $log, User $sender): void
    {
        $manager = $department->manager;

        if ($manager) {
            $manager->notify(new \App\Notifications\TicketTransferred($feedback, $log, $sender));
        }
    }
}