<?php

namespace App\Observers;

use App\Models\User;
use Illuminate\Validation\ValidationException;

class UserObserver
{
    /**
     * Handle the User "creating" event.
     */
    public function creating(User $user): void
    {
        if ($user->contractor_id) {
            $contractor = $user->contractor;
            
            if ($contractor) {
                $currentUsersCount = $contractor->users()->count();
                
                // If user_limit is 0, it might mean unlimited, but let's assume it's a hard limit.
                // Or if it's > 0, we enforce it.
                if ($contractor->user_limit > 0 && $currentUsersCount >= $contractor->user_limit) {
                    throw ValidationException::withMessages([
                        'contractor_id' => 'The contractor has reached its maximum user limit of ' . $contractor->user_limit . '.',
                    ]);
                }
            }
        }
    }

    /**
     * Handle the User "updating" event.
     */
    public function updating(User $user): void
    {
        // If the user's contractor_id is changing, check limits on the new contractor
        if ($user->isDirty('contractor_id') && $user->contractor_id) {
            $contractor = $user->contractor;
            
            if ($contractor) {
                $currentUsersCount = $contractor->users()->count();
                
                if ($contractor->user_limit > 0 && $currentUsersCount >= $contractor->user_limit) {
                    throw ValidationException::withMessages([
                        'contractor_id' => 'The contractor has reached its maximum user limit of ' . $contractor->user_limit . '.',
                    ]);
                }
            }
        }
    }
}