<?php

namespace App\InvoiceRule;

use Doctrine\ORM\EntityManagerInterface;

use App\InvoiceRuleInterface;

use App\Entity\ServiceOffering;
use App\Entity\CustomerVehicle;
use App\Entity\ItemType;

use App\Ramcar\TransactionOrigin;

use App\Service\PriceTierManager;

class Jumpstart implements InvoiceRuleInterface
{
    protected $em;
    protected $pt_manager;

    public function __construct(EntityManagerInterface $em, PriceTierManager $pt_manager)
    {
        $this->em = $em;
        $this->pt_manager = $pt_manager;
    }

    public function getID()
    {   
        return 'jumpstart_troubleshoot';
    }

    public function compute($criteria, &$total)
    {
        $stype = $criteria->getServiceType();
        $source = $criteria->getSource();
        $pt_id = $criteria->getPriceTier();

        $items = [];

        if ($stype == $this->getID())
        {
            $cv = $criteria->getCustomerVehicle();

            // check if price tier has item price
            $pt_price = $this->getPriceTierItemPrice($pt_id, $source, $cv);

            if ($pt_price == null)
                $price = $this->getServiceTypeFee($source, $cv);
            else
                $price = $pt_price;

            // add the service fee to items
            $qty = 1;
            $items[] = [
                'service_type' => $this->getID(),
                'qty' => $qty,
                'title' => $this->getServiceTitle(),
                'price' => $price,
            ];

            $qty_price = bcmul($price, $qty, 2);
            $total['total_price'] = bcadd($total['total_price'], $qty_price, 2);
        }

        return $items;
    }

    public function getServiceTypeFee($source, CustomerVehicle $cv)
    {
        // check the source of JO
        // (1) if from app, service fee is 0 if motolite user. jumpstart fee for app  if non-motolite user.
        // (2) any other source, jumpstart fees are charged whether motolite user or not
        if ($source == TransactionOrigin::MOBILE_APP)
        {
            if ($cv->hasMotoliteBattery())
                $code = 'motolite_user_service_fee';
            else
                $code = 'jumpstart_fee_mobile_app';
        }
        else
            $code = 'jumpstart_fee';

        $fee = $this->em->getRepository(ServiceOffering::class)->findOneBy(['code' => $code]);

        if ($fee == null)
            return 0;

        return $fee->getFee();
    }

    public function validatePromo($criteria, $promo_id)
    {
        return false;
    }

    public function validateInvoiceItems($criteria, $invoice_items)
    {
        return null;
    }

    protected function getPriceTierItemPrice($pt_id, $source, $cv)
    {
        // price_tier is default
        if ($pt_id == 0)
            return null;

        // find the item type for service offering
        $item_type = $this->em->getRepository(ItemType::class)->findOneBy(['code' => 'service_offering']);
        if ($item_type == null)
            return null;

        // find the service offering
        // check the source of JO
        // (1) if from app, service fee is 0 if motolite user. jumpstart fee for app  if non-motolite user.
        // (2) any other source, jumpstart fees are charged whether motolite user or not
        if ($source == TransactionOrigin::MOBILE_APP)
        {
            if ($cv->hasMotoliteBattery())
                $code = 'motolite_user_service_fee';
            else
                $code = 'jumpstart_fee_mobile_app';
        }
        else
            $code = 'jumpstart_fee';

        $service = $this->em->getRepository(ServiceOffering::class)->findOneBy(['code' => $code]);

        // check if service is null. If null, return null
        if ($service == null)
            return null;

        $item_type_id = $item_type->getID();
        $item_id = $service->getID();

        $price = $this->pt_manager->getItemPrice($pt_id, $item_type_id, $item_id);

        return $price;
    }

    protected function getServiceTitle()
    {
        $title = 'Service - Troubleshooting fee'; 

        return $title;
    }
}