<?php

namespace App\Controller;

use App\Ramcar\BaseController;
use App\Ramcar\ServiceType;
use App\Ramcar\JOStatus;
use App\Ramcar\WarrantyClass;
use App\Ramcar\DiscountApply;
use App\Ramcar\TradeInType;
use App\Ramcar\InvoiceCriteria;
use App\Ramcar\InvoiceStatus;
use App\Entity\JobOrder;
use App\Entity\BatteryManufacturer;
use App\Entity\Customer;
use App\Entity\CustomerVehicle;
use App\Entity\Outlet;
use App\Entity\Promo;
use App\Entity\Rider;
use App\Entity\Battery;

use App\Service\InvoiceCreator;
use App\Service\MapTools;

use Doctrine\ORM\Query;
use Doctrine\DBAL\LockMode;
use Doctrine\ORM\PessimisticLockException;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Validator\Validator\ValidatorInterface;

use CrEOF\Spatial\PHP\Types\Geometry\Point;

use DateTime;

class JobOrderController extends BaseController
{
    public function incomingForm()
    {
        $this->denyAccessUnlessGranted('jo_in.list', null, 'No access.');

        $params = $this->initParameters('jo_in');
        $params['obj'] = new JobOrder();
        $params['mode'] = 'create';
        $params['submit_url'] = $this->generateUrl('jo_in_submit');
        $params['return_url'] = $this->generateUrl('jo_in');

        $em = $this->getDoctrine()->getManager();

        // get parent associations
        $params['bmfgs'] = $em->getRepository(BatteryManufacturer::class)->findAll();
        $params['customers'] = $em->getRepository(Customer::class)->findAll();
        $params['promos'] = $em->getRepository(Promo::class)->findAll();
        $params['service_types'] = ServiceType::getCollection();
        $params['warranty_classes'] = WarrantyClass::getCollection();
        $params['statuses'] = JOStatus::getCollection();
        $params['discount_apply'] = DiscountApply::getCollection();
        $params['trade_in_types'] = TradeInType::getCollection();

        // response
        return $this->render('job-order/form.html.twig', $params);
    }

    public function incomingSubmit(Request $req, ValidatorInterface $validator, InvoiceCreator $ic)
    {
        error_log(print_r($req->request->all(), true));
        $this->denyAccessUnlessGranted('jo_in.list', null, 'No access.');

        // initialize error list
        $error_array = [];

        // create new row
        $em = $this->getDoctrine()->getManager();
        $obj = new JobOrder();

        // check if lat and lng are provided
        if (empty($req->request->get('coord_lng')) || empty($req->request->get('coord_lat'))) {
            $error_array['coordinates'] = 'No map coordinates provided. Please click on a location on the map.';
        }

        // check if customer vehicle is set
        if (empty($req->request->get('customer_vehicle'))) {
            $error_array['customer_vehicle'] = 'No vehicle selected.';
        } else {
            // get customer vehicle
            $cust_vehicle = $em->getRepository(CustomerVehicle::class)->find($req->request->get('customer_vehicle'));

            if (empty($cust_vehicle)) {
                $error_array['customer_vehicle'] = 'Invalid vehicle specified.';
            }
        }

        if (empty($error_array)) {
            // coordinates
            $point = new Point($req->request->get('coord_lng'), $req->request->get('coord_lat'));

            // set and save values
            $obj->setDateCreate(DateTime::createFromFormat("d M Y", $req->request->get('date_transaction')))
                ->setDateSchedule(DateTime::createFromFormat("d M Y h:i A", $req->request->get('date_schedule_date') . " " . $req->request->get('date_schedule_time')))
                ->setCoordinates($point)
                ->setAdvanceOrder($req->request->get('flag_advance') ?? false)
                ->setCreatedBy($this->getUser())
                ->setServiceType($req->request->get('service_type'))
                ->setWarrantyClass($req->request->get('warranty_class'))
                ->setCustomer($cust_vehicle->getCustomer())
                ->setCustomerVehicle($cust_vehicle)
                ->setSource('web')
                ->setStatus(JOStatus::PENDING)
                ->setDeliveryInstructions($req->request->get('delivery_instructions'))
                ->setAgentNotes($req->request->get('agent_notes'))
                ->setDeliveryAddress($req->request->get('delivery_address'));

            // instantiate invoice criteria
            $criteria = new InvoiceCriteria();

            $ierror = $this->invoicePromo($em, $criteria, $req->request->get('invoice_promo'));
            $invoice_items = $req->request->get('invoice_items');

            if (!$ierror && !empty($invoice_items))
                $ierror = $this->invoiceBatteries($em, $criteria, $invoice_items);

            if ($ierror)
            {
                $error_array['invoice'] = $ierror;
            }
            else
            {
                // generate the invoice
                $iobj = $ic->processCriteria($criteria);
                $iobj->setStatus(InvoiceStatus::DRAFT)
                    ->setCreatedBy($this->getUser());

                // validate
                $ierrors = $validator->validate($iobj);

                // add errors to list
                foreach ($ierrors as $error) {
                    $error_array[$error->getPropertyPath()] = $error->getMessage();
                }

                // add invoice to JO
                $obj->setInvoice($iobj);

                // save
                $em->persist($iobj);
            }

            // validate
            $errors = $validator->validate($obj);

            // add errors to list
            foreach ($errors as $error) {
                $error_array[$error->getPropertyPath()] = $error->getMessage();
            }
        }

        // check if any errors were found
        if (!empty($error_array)) {
            // return validation failure response
            return $this->json([
                'success' => false,
                'errors' => $error_array
            ], 422);
        }

        // validated! save the entity
        $em->persist($obj);
        $em->flush();

        // return successful response
        return $this->json([
            'success' => 'Changes have been saved!'
        ]);
    }

    protected function checkTier($tier)
    {
        // check specified tier
        switch ($tier) {
            case 'proc':
                $tier_key = 'jo_proc';
                $tier_name = 'Processing';
                $rows_route = 'jo_proc_rows';
                $edit_route = 'jo_proc_form';
                $jo_status = JOStatus::PENDING;
                break;
            case 'assign':
                $tier_key = 'jo_assign';
                $tier_name = 'Assigning';
                $rows_route = 'jo_assign_rows';
                $edit_route = 'jo_assign_form';
                $jo_status = JOStatus::RIDER_ASSIGN;
                break;
            default:
                $exception = $this->createAccessDeniedException('No access.');
                throw $exception;
        }

        // check acl
        $this->denyAccessUnlessGranted($tier_key . '.list', null, 'No access.');

        // return params if allowed access
        return [
            'key' => $tier_key,
            'name' => $tier_name,
            'rows_route' => $rows_route,
            'edit_route' => $edit_route,
            'jo_status' => $jo_status
        ];
    }

    public function listAssigning()
    {
        $params = $this->initParameters('jo_assign');

        return $this->render('job-order/list.assigning.html.twig', $params);
    }

    public function listRows($tier)
    {
        // check which job order tier is being called for and confirm access
        $tier_params = $this->checkTier($tier);

        $params = $this->initParameters($tier_params['key']);

        $params['tier_name'] = $tier_params['name'];
        $params['rows_route'] = $tier_params['rows_route'];

        // response
        return $this->render('job-order/list.html.twig', $params);
    }

    public function getRows(Request $req, $tier)
    {
        // check which job order tier is being called for and confirm access
        $tier_params = $this->checkTier($tier);

        // get query builder
        $qb = $this->getDoctrine()
            ->getRepository(JobOrder::class)
            ->createQueryBuilder('q');

        // get datatable params
        $datatable = $req->request->get('datatable');

        // count total records
        $tquery = $qb->select('COUNT(q)');

        $this->setQueryFilters($datatable, $tquery, $qb, $tier_params['jo_status']);

        $total = $tquery->getQuery()
            ->getSingleScalarResult();

        // get current page number
        $page = $datatable['pagination']['page'] ?? 1;

        $perpage = $datatable['pagination']['perpage'];
        $offset = ($page - 1) * $perpage;

        // add metadata
        $meta = [
            'page' => $page,
            'perpage' => $perpage,
            'pages' => ceil($total / $perpage),
            'total' => $total,
            'sort' => 'asc',
            'field' => 'id'
        ];

        // build query
        $query = $qb->select('q');

        $this->setQueryFilters($datatable, $query, $qb, $tier_params['jo_status']);

        // check if sorting is present, otherwise use default
        if (isset($datatable['sort']['field']) && !empty($datatable['sort']['field'])) {
            $order = $datatable['sort']['sort'] ?? 'asc';
            $query->orderBy('q.' . $datatable['sort']['field'], $order);
        } else {
            $query->orderBy('q.date_schedule', 'asc');
        }

        // get rows for this page
        $obj_rows = $query->setFirstResult($offset)
            ->setMaxResults($perpage)
            ->getQuery()
            ->getResult();

        $statuses = JOStatus::getCollection();
        $service_types = ServiceType::getCollection();

        // process rows
        $rows = [];
        foreach ($obj_rows as $orow) {
            // add row data
            $row['id'] = $orow->getID();
            $row['delivery_address'] = $orow->getDeliveryAddress();
            $row['date_schedule'] = $orow->isAdvanceOrder() ? $orow->getDateSchedule()->format("d M Y g:i A") : 'Immediate';
            $row['service_type'] = $service_types[$orow->getServiceType()];
            $row['status'] = $statuses[$orow->getStatus()];
            $row['flag_advance'] = $orow->isAdvanceOrder();

            $processor = $orow->getProcessedBy();
            if ($processor == null)
                $row['processor'] = '';
            else
                $row['processor'] = $orow->getProcessedBy()->getFullName();

            $assignor = $orow->getAssignedBy();
            if ($assignor == null)
                $row['assignor'] = '';
            else
                $row['assignor'] = $orow->getAssignedBy()->getFullName();

            // add crud urls
            $row['meta']['update_url'] = $this->generateUrl($tier_params['edit_route'], ['id' => $row['id']]);

            $rows[] = $row;
        }

        // response
        return $this->json([
            'meta' => $meta,
            'data' => $rows
        ]);
    }

    public function processingForm(MapTools $map_tools, $id)
    {
        $this->denyAccessUnlessGranted('jo_proc.list', null, 'No access.');

        $em = $this->getDoctrine()->getManager();

        // manual transaction since we're locking
        $em->getConnection()->beginTransaction();

        try
        {

            // lock and get data
            $obj = $em->getRepository(JobOrder::class)->find($id, LockMode::PESSIMISTIC_READ);

            // make sure this job order exists
            if (empty($obj))
            {
                $em->getConnection()->rollback();
                throw $this->createNotFoundException('The job order does not exist');
            }

            // check status
            if ($obj->getStatus() != JOStatus::PENDING)
            {
                $em->getConnection()->rollback();
                throw $this->createNotFoundException('The job order does not have a pending status');
            }
                
            // check if we are the processor
            $processor = $obj->getProcessedBy();
            $user = $this->getUser();
            // TODO: go back to list page and display alert / flash that says they cannot access it because they
            //       are not the processor
            if ($processor != null && $processor->getID() != $user->getID())
            {
                $em->getConnection()->rollback();
                throw $this->createAccessDeniedException('Not the processor');
            }

            // make this user be the processor
            $obj->setProcessedBy($user);
            $em->flush();

            $em->getConnection()->commit();
        }
        catch(PessimisticLockException $e)
        {
            throw $this->createAccessDeniedException('Not the processor');
        }

        // NOTE: we are able to lock, everything should be fine now

        $params = $this->initParameters('jo_proc');
        $params['mode'] = 'update-processing';


        // get parent associations
        $params['bmfgs'] = $em->getRepository(BatteryManufacturer::class)->findAll();
        $params['customers'] = $em->getRepository(Customer::class)->findAll();
        $params['service_types'] = ServiceType::getCollection();
        $params['warranty_classes'] = WarrantyClass::getCollection();
        $params['statuses'] = JOStatus::getCollection();
        $params['promos'] = $em->getRepository(Promo::class)->findAll();
        $params['discount_apply'] = DiscountApply::getCollection();
        $params['trade_in_types'] = TradeInType::getCollection();

        // get closest outlets
        $outlets = $map_tools->getClosestOutlets($obj->getCoordinates(), 10, date("H:i:s"));

        $params['outlets'] = [];

        // format duration and distance into friendly time
        foreach ($outlets as $outlet) {
            // duration
            $seconds = $outlet['duration'];

            if (!empty($seconds) && $seconds > 0) {
                $hours = floor($seconds / 3600);
                $minutes = ceil(($seconds / 60) % 60);

                $outlet['duration'] = ($hours > 0 ? number_format($hours) . " hr" . ($hours > 1 ? "s" : '') . ($minutes > 0 ? ", " : '') : '') . ($minutes > 0 ? number_format($minutes) . " min" . ($minutes > 1 ? "s" : '') : '');
            } else {
                $outlet['duration'] = false;
            }

            // distance
            $meters = $outlet['distance'];

            if (!empty($meters) && $meters > 0) {
                $outlet['distance'] = round($meters / 1000) . " km";
            } else {
                $outlet['distance'] = false;
            }
                
            $params['outlets'][] = $outlet;
        }

        $params['obj'] = $obj;
        $params['submit_url'] = $this->generateUrl('jo_proc_submit', ['id' => $obj->getID()]);
        $params['return_url'] = $this->generateUrl('jo_proc');

        // response
        return $this->render('job-order/form.html.twig', $params);
    }

    public function processingSubmit(Request $req, ValidatorInterface $validator, $id)
    {
        $this->denyAccessUnlessGranted('jo_proc.list', null, 'No access.');

        // get object data
        $em = $this->getDoctrine()->getManager();
        $obj = $em->getRepository(JobOrder::class)->find($id);
        $processor = $obj->getProcessedBy();
        $user = $this->getUser();

        // check if we're the one processing, return error otherwise
        if ($processor == null)
            throw $this->createAccessDeniedException('Not the processor');
            
        if ($processor != null && $processor->getID() != $user->getID())
            throw $this->createAccessDeniedException('Not the processor');

        // initialize error list
        $error_array = [];


        // make sure this object exists
        if (empty($obj))
            throw $this->createNotFoundException('The item does not exist');

        // check if lat and lng are provided
        if (empty($req->request->get('coord_lng')) || empty($req->request->get('coord_lat'))) {
            $error_array['coordinates'] = 'No map coordinates provided. Please click on a location on the map.';
        }

        // check if outlet is set
        if (empty($req->request->get('outlet'))) {
            $error_array['outlet'] = 'No outlet selected.';
        } else {
            // get outlet
            $outlet = $em->getRepository(Outlet::class)->find($req->request->get('outlet'));

            if (empty($outlet)) {
                $error_array['outlet'] = 'Invalid outlet specified.';
            }
        }

        if (empty($error_array)) {
            // coordinates
            $point = new Point($req->request->get('coord_lng'), $req->request->get('coord_lat'));

            // set and save values
            $obj->setDateSchedule(DateTime::createFromFormat("d M Y h:i A", $req->request->get('date_schedule_date') . " " . $req->request->get('date_schedule_time')))
                ->setCoordinates($point)
                ->setAdvanceOrder($req->request->get('flag_advance') ?? false)
                ->setServiceType($req->request->get('service_type'))
                ->setWarrantyClass($req->request->get('warranty_class'))
                ->setSource('web')
                ->setStatus(JOStatus::RIDER_ASSIGN)
                ->setDeliveryInstructions($req->request->get('delivery_instructions'))
                ->setAgentNotes($req->request->get('agent_notes'))
                ->setDeliveryAddress($req->request->get('delivery_address'))
                ->setOutlet($outlet);

            // validate
            $errors = $validator->validate($obj);

            // add errors to list
            foreach ($errors as $error) {
                $error_array[$error->getPropertyPath()] = $error->getMessage();
            }
        }

        // check if any errors were found
        if (!empty($error_array)) {
            // return validation failure response
            return $this->json([
                'success' => false,
                'errors' => $error_array
            ], 422);
        }

        // validated! save the entity
        $em->flush();

        // return successful response
        return $this->json([
            'success' => 'Changes have been saved!'
        ]);
    }

    public function assigningForm(MapTools $map_tools, $id)
    {
        $this->denyAccessUnlessGranted('jo_assign.list', null, 'No access.');

        $em = $this->getDoctrine()->getManager();

        // manual transaction since we're locking
        $em->getConnection()->beginTransaction();

        $params = $this->initParameters('jo_assign');
        $params['mode'] = 'update-assigning';

        try
        {
            // get row data
            $obj = $em->getRepository(JobOrder::class)->find($id);

            // make sure this row exists
            if (empty($obj))
            {
                $em->getConnection()->rollback();
                throw $this->createNotFoundException('The job order does not exist');
            }

            // check status
            if ($obj->getStatus() != JOStatus::RIDER_ASSIGN)
            {
                $em->getConnection()->rollback();
                throw $this->createNotFoundException('The job order does not have an assigning status');
            }

            // check if we are the assignor
            $assignor = $obj->getAssignedBy();
            $user = $this->getUser();

            if ($assignor != null && $assignor->getID() != $user->getID())
            {
                $em->getConnection()->rollback();
                throw $this->createAccessDeniedException('Not the assignor');
            }

            // make this user be the assignor
            $obj->setAssignedBy($user);
            $em->flush();

            $em->getConnection()->commit();
        }
        catch (PessimisticLockException $e)
        {
            throw $this->createAccessDeniedException('Not the assignor');
        }

        // get parent associations
        $params['bmfgs'] = $em->getRepository(BatteryManufacturer::class)->findAll();
        $params['customers'] = $em->getRepository(Customer::class)->findAll();
        $params['service_types'] = ServiceType::getCollection();
        $params['warranty_classes'] = WarrantyClass::getCollection();
        $params['statuses'] = JOStatus::getCollection();
        $params['promos'] = $em->getRepository(Promo::class)->findAll();
        $params['discount_apply'] = DiscountApply::getCollection();
        $params['trade_in_types'] = TradeInType::getCollection();

        // get closest outlets
        $outlets = $map_tools->getClosestOutlets($obj->getCoordinates(), 10, date("H:i:s"));

        $params['outlets'] = [];

        // format duration and distance into friendly time
        foreach ($outlets as $outlet) {
            // duration
            $seconds = $outlet['duration'];

            if (!empty($seconds) && $seconds > 0) {
                $hours = floor($seconds / 3600);
                $minutes = ceil(($seconds / 60) % 60);

                $outlet['duration'] = ($hours > 0 ? number_format($hours) . " hr" . ($hours > 1 ? "s" : '') . ($minutes > 0 ? ", " : '') : '') . ($minutes > 0 ? number_format($minutes) . " min" . ($minutes > 1 ? "s" : '') : '');
            } else {
                $outlet['duration'] = false;
            }

            // distance
            $meters = $outlet['distance'];

            if (!empty($meters) && $meters > 0) {
                $outlet['distance'] = round($meters / 1000) . " km";
            } else {
                $outlet['distance'] = false;
            }
                
            $params['outlets'][] = $outlet;
        }

        $params['obj'] = $obj;
        $params['submit_url'] = $this->generateUrl('jo_assign_submit', ['id' => $obj->getID()]);
        $params['return_url'] = $this->generateUrl('jo_assign');

        // response
        return $this->render('job-order/form.html.twig', $params);
    }

    public function assigningSubmit(Request $req, ValidatorInterface $validator, $id)
    {
        $this->denyAccessUnlessGranted('jo_assign.list', null, 'No access.');

        // initialize error list
        $error_array = [];

        // get object data
        $em = $this->getDoctrine()->getManager();
        $obj = $em->getRepository(JobOrder::class)->find($id);

        // make sure this object exists
        if (empty($obj))
            throw $this->createNotFoundException('The item does not exist');

        // check if lat and lng are provided
        if (empty($req->request->get('coord_lng')) || empty($req->request->get('coord_lat'))) {
            $error_array['coordinates'] = 'No map coordinates provided. Please click on a location on the map.';
        }

        // check if rider is set
        if (empty($req->request->get('rider'))) {
            $error_array['rider'] = 'No rider selected.';
        } else {
            // get rider
            $rider = $em->getRepository(Rider::class)->find($req->request->get('rider'));

            if (empty($rider)) {
                $error_array['rider'] = 'Invalid rider specified.';
            }
        }

        if (empty($error_array)) {
            // coordinates
            $point = new Point($req->request->get('coord_lng'), $req->request->get('coord_lat'));

            // set and save values
            $obj->setDateSchedule(DateTime::createFromFormat("d M Y h:i A", $req->request->get('date_schedule_date') . " " . $req->request->get('date_schedule_time')))
                ->setCoordinates($point)
                ->setAdvanceOrder($req->request->get('flag_advance') ?? false)
                ->setServiceType($req->request->get('service_type'))
                ->setWarrantyClass($req->request->get('warranty_class'))
                ->setSource('web')
                ->setStatus(JOStatus::ASSIGNED)
                ->setDeliveryInstructions($req->request->get('delivery_instructions'))
                ->setAgentNotes($req->request->get('agent_notes'))
                ->setDeliveryAddress($req->request->get('delivery_address'))
                ->setAssignedBy($this->getUser())
                ->setDateAssign(new DateTime())
                ->setRider($rider);

            // validate
            $errors = $validator->validate($obj);

            // add errors to list
            foreach ($errors as $error) {
                $error_array[$error->getPropertyPath()] = $error->getMessage();
            }
        }

        // check if any errors were found
        if (!empty($error_array)) {
            // return validation failure response
            return $this->json([
                'success' => false,
                'errors' => $error_array
            ], 422);
        }

        // validated! save the entity
        $em->flush();

        // return successful response
        return $this->json([
            'success' => 'Changes have been saved!'
        ]);
    }


    // TODO: re-enable search, figure out how to group the orWhere filters into one, so can execute that plus the pending filter

    // check if datatable filter is present and append to query
    protected function setQueryFilters($datatable, &$query, $qb, $status)
    {
        $query->where('q.status = :status')
            ->setParameter('status', $status);

        // get only pending rows
        /*
        $query->where($qb->expr()->orX(
             $qb->expr()where('q.status', 'pending');
        ));
       

        // apply filters
        if (isset($datatable['query']['data-rows-search']) && !empty($datatable['query']['data-rows-search'])) {
            $query->where('q.delivery_address LIKE :filter')
                ->orWhere($qb->expr()->concat('c.first_name', $qb->expr()->literal(' '), 'c.last_name') . ' LIKE :filter')
                ->orWhere('cv.plate_number LIKE :filter')
                ->setParameter('filter', '%' . $datatable['query']['data-rows-search'] . '%');
        }
        */
    }

    protected function invoicePromo($em, InvoiceCriteria $criteria, $promo_id)
    {
        // return error if there's a problem, false otherwise

        if (empty($promo_id))
            return false;

        // check if this is a valid promo
        $promo = $em->getRepository(Promo::class)->find($promo_id);

        if (empty($promo))
            return 'Invalid promo specified.';

        $criteria->addPromo($promo);
        return false;
    }

    protected function invoiceBatteries($em, InvoiceCriteria $criteria, $items)
    {
        // return error if there's a problem, false otherwise
        if (!empty($items)) 
        {
            foreach ($items as $item)
            {
                // check if this is a valid battery
                $battery = $em->getRepository(Battery::class)->find($item['battery']);

                if (empty($battery))
                {
                    $error = 'Invalid battery specified.';
                    return $error;
                }

                // quantity
                $qty = $item['quantity'];
                if ($qty < 1)
                    continue;

                // add to criteria
                $criteria->addBattery($battery, $qty);

                // if this is a trade in, add trade in
                if (!empty($item['trade_in']) && TradeInType::validate($item['trade_in']))
                    $criteria->addTradeIn($item['trade_in'] == 'motolite', $qty);
            }
        }
            
        return null;
    }

    public function generateInvoice(Request $req, InvoiceCreator $ic)
    {
        $error = false;

        $items = $req->request->get('items');
        $promo_id = $req->request->get('promo');

        $em = $this->getDoctrine()->getManager();

        // instantiate invoice criteria
        $criteria = new InvoiceCriteria();

        $error = $this->invoicePromo($em, $criteria, $promo_id);

        if (!$error)
            $error = $this->invoiceBatteries($em, $criteria, $items);

        if ($error)
        {
            // something happened
            return $this->json([
                'success' => false,
                'error' => $error
            ], 422);
        }

        // generate the invoice
        $iobj = $ic->processCriteria($criteria);

        // use invoice object values in a json friendly array
        $invoice = [
            'discount' => number_format($iobj->getDiscount(), 2),
            'trade_in' => number_format($iobj->getTradeIn(), 2), // TODO: computations not done yet for this on invoice creator
            'price' => number_format($iobj->getVATExclusivePrice(), 2),
            'vat' => number_format($iobj->getVAT(), 2),
            'total_price' => number_format($iobj->getTotalPrice(), 2),
            'items' => []
        ];

        foreach ($iobj->getItems() as $item)
        {
            $invoice['items'][] = [
                'title' => $item->getTitle(),
                'quantity' => number_format($item->getQuantity()), // TODO: quantities are always 1, hardcoded into InvoiceCreator. no way of accepting quantities on InvoiceCriteria
                'unit_price' => number_format($item->getPrice(), 2),
                'amount' => number_format($item->getPrice() * $item->getQuantity(), 2) // TODO: should this calculation should be a saved value on InvoiceItem instead?
            ];
        }

        // return
        return $this->json([
            'success' => true,
            'invoice' => $invoice
        ]);
    }
}