<?php

namespace App\Services\Qms;

use App\Models\ServiceSession;
use App\Models\Ticket;

class ServiceSessionTracker
{
    public function start(Ticket $ticket, ?string $staffRef = null): ServiceSession
    {
        return ServiceSession::create([
            'owner_ref' => $ticket->owner_ref,
            'ticket_id' => $ticket->id,
            'counter_id' => $ticket->counter_id,
            'staff_ref' => $staffRef,
            'started_at' => now(),
        ]);
    }

    public function endForTicket(Ticket $ticket): ?ServiceSession
    {
        $session = ServiceSession::query()
            ->where('ticket_id', $ticket->id)
            ->whereNull('ended_at')
            ->latest('started_at')
            ->first();

        if (! $session) {
            return null;
        }

        $ended = now();
        $session->update([
            'ended_at' => $ended,
            'duration_seconds' => $session->started_at->diffInSeconds($ended),
        ]);

        return $session->fresh();
    }
}