<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2021. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Utils\Traits\Notifications;

use App\Models\Client;
use App\Models\Credit;
use App\Models\Invoice;
use App\Models\Payment;
use App\Models\Quote;

/**
 * Class UserNotifies.
 *
 * I think the term $required_permissions is confusing here, what
 * we are actually defining is the notifications available on the 
 * user itself.
 */
trait UserNotifies
{
    public function findUserNotificationTypes($invitation, $company_user, $entity_name, $required_permissions) :array
    {

        $notifiable_methods = [];
        $notifications = $company_user->notifications;

        if ($invitation->company->is_disabled && is_array($notifications->email) || $company_user->trashed() || $company_user->user->trashed()) {
            return [];
        }
        
        //if a user owns this record or is assigned to it, they are attached the permission for notification.
        if ($invitation->{$entity_name}->user_id == $company_user->_user_id || $invitation->{$entity_name}->assigned_user_id == $company_user->user_id) {
            $required_permissions = $this->addSpecialUserPermissionForEntity($invitation->{$entity_name}, $required_permissions);
        }
        else{
            $required_permissions = $this->removeSpecialUserPermissionForEntity($invitation->{$entity_name}, $required_permissions);
        }

        if (count(array_intersect($required_permissions, $notifications->email)) >= 1) {
            array_push($notifiable_methods, 'mail');
        }

        return $notifiable_methods;
    }

    public function findUserEntityNotificationType($entity, $company_user, array $required_permissions) :array
    {
        $notifiable_methods = [];
        $notifications = $company_user->notifications;

        if ($entity->company->is_disabled || ! $notifications || $company_user->trashed() || $company_user->user->trashed()) {
            return [];
        }

        if ($entity->user_id == $company_user->_user_id || $entity->assigned_user_id == $company_user->user_id) {
            $required_permissions = $this->addSpecialUserPermissionForEntity($entity, $required_permissions);
        }
        else{
            $required_permissions = $this->removeSpecialUserPermissionForEntity($entity, $required_permissions);
        }

        if (count(array_intersect($required_permissions, $notifications->email)) >= 1) {
            array_push($notifiable_methods, 'mail');
        }

        return $notifiable_methods;
    }

    private function addSpecialUserPermissionForEntity($entity, array $required_permissions) :array
    {

        array_merge($required_permissions, ["all_notifications"]);

        switch ($entity) {
            case ($entity instanceof Payment || $entity instanceof Client): //we pass client also as this is the proxy for Payment Failures (ie, there is no payment)
                return array_merge($required_permissions, ["all_notifications","all_user_notifications","payment_failure_user","payment_success_user"]);
                break;
            case ($entity instanceof Invoice):
                return array_merge($required_permissions, ["all_notifications","all_user_notifications","invoice_created_user","invoice_sent_user","invoice_viewed_user","invoice_late_user"]);
                break;
            case ($entity instanceof Quote):
                return array_merge($required_permissions, ["all_notifications","all_user_notifications","quote_created_user","quote_sent_user","quote_viewed_user","quote_approved_user","quote_expired_user"]);
                break;
            case ($entity instanceof Credit):
                return array_merge($required_permissions, ["all_notifications","all_user_notifications","credit_created_user","credit_sent_user","credit_viewed_user"]);
                break;            
            default:
                return [];
                break;
        }
    }

    private function removeSpecialUserPermissionForEntity($entity, $required_permissions)
    {
        array_merge($required_permissions, ["all_notifications"]);

        switch ($entity) {
            case ($entity instanceof Payment || $entity instanceof Client): //we pass client also as this is the proxy for Payment Failures (ie, there is no payment)
                return array_diff($required_permissions, ["all_user_notifications","payment_failure_user","payment_success_user"]);
                break;
            case ($entity instanceof Invoice):
                return array_diff($required_permissions, ["all_user_notifications","invoice_created_user","invoice_sent_user","invoice_viewed_user","invoice_late_user"]);
                break;
            case ($entity instanceof Quote):
                return array_diff($required_permissions, ["all_user_notifications","quote_created_user","quote_sent_user","quote_viewed_user","quote_approved_user","quote_expired_user"]);
                break;
            case ($entity instanceof Credit):
                return array_diff($required_permissions, ["all_user_notifications","credit_created_user","credit_sent_user","credit_viewed_user"]);
                break;            
            default:
                // code...
                break;
        }
    }


    public function findCompanyUserNotificationType($company_user, $required_permissions) :array
    {

        if ($company_user->company->is_disabled || $company_user->trashed() || $company_user->user->trashed()) {
            return [];
        }

        $notifiable_methods = [];
        $notifications = $company_user->notifications;

        //conditional to define whether the company user has the required notification for the MAIL notification TYPE
        if (count(array_intersect($required_permissions, $notifications->email)) >= 1 || count(array_intersect($required_permissions, ['all_user_notifications'])) >= 1 || count(array_intersect($required_permissions, ['all_notifications'])) >= 1) {
            array_push($notifiable_methods, 'mail');
        }

        return $notifiable_methods;
    }

    /*
     * Returns a filtered collection of users with the
     * required notification - NOTE this is only implemented for 
     * EMAIL notification types - we'll need to chain
     * additional types at a later stage.
     */
    public function filterUsersByPermissions($company_users, $entity, array $required_notification)
    {

        return $company_users->filter(function($company_user) use($required_notification, $entity){

            return $this->checkNotificationExists($company_user, $entity, $required_notification);

        });

    }

    private function checkNotificationExists($company_user, $entity, $required_notification)
    {
        /* Always make sure we push the `all_notificaitons` into the mix */
        array_push($required_notification, 'all_notifications');

        /* Selectively add the all_user if the user is associated with the entity */
        if ($entity->user_id == $company_user->_user_id || $entity->assigned_user_id == $company_user->user_id) 
            array_push($required_notification, 'all_user_notifications');
        

        return count(array_intersect($required_notification, $company_user->notifications->email)) >= 1;
    }
}