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<?php

namespace Corals\Modules\Reservation\Classes;

use Corals\Modules\Payment\Common\Models\Invoice;
use Corals\Modules\Payment\Common\Models\InvoiceItem;
use Corals\Modules\Reservation\Facades\RatesFacade;
use Corals\Modules\Reservation\Models\LineItemValue;
use Corals\Modules\Reservation\Models\Reservation;
use Corals\User\Models\User;
use Illuminate\Support\Facades\DB;

class Invoices
{
    /**
     * @param Reservation $reservation
     * @param array $lineItems
     * @return Invoice
     */
    public function generate(Reservation $reservation, array $lineItems)
    {
        try {
            DB::beginTransaction();

            RatesFacade::calculateLineItemValues($reservation, $lineItems);

            return tap($this->createInvoice($reservation), function (Invoice $invoice) {
                $this->createInvoiceItems($invoice);
                DB::commit();
            });

        } catch (\Exception $e) {
            DB::rollback();
            log_exception($e);
        }
    }

    /**
     * @param Reservation $reservation
     * @return \Illuminate\Database\Eloquent\Model
     */
    protected function createInvoice(Reservation $reservation)
    {
        $total = $reservation->lineItemValues()->sum('value');

        if ($invoice = $reservation->invoice) {
            $this->deleteInvoice($invoice);
        }

        $user_id = null;

        if ($reservation->owner_type === getMorphAlias(User::class)) {
            $user_id = $reservation->owner_id;
        }

        return $reservation->invoice()->create([
            'code' => Invoice::getCode('INV'),
            'currency' => 'USD',
            'description' => null,
            'terms' => null,
            'status' => 'pending',
            'due_date' => now(),
            'invoice_date' => now(),
            'sub_total' => $total,
            'total' => $total,
            'user_id' => $user_id,
        ]);
    }

    /**
     * @param Invoice $invoice
     * @return Invoice
     */
    protected function createInvoiceItems(Invoice $invoice)
    {
        $reservation = $invoice->invoicable;

        $reservation->lineItemValues
            ->each(function (LineItemValue $lineItemValue) use ($invoice) {

                $lineItem = $lineItemValue->lineItem;

                $invoiceItem = InvoiceItem::create([
                    'code' => InvoiceItem::getCode('INV'),
                    'amount' => $lineItemValue->value,
                    'invoice_id' => $invoice->id,
                    'itemable_type' => getMorphAlias($lineItem),
                    'itemable_id' => $lineItem->id,
                    'description' => $lineItem->description,
                    'quantity' => $lineItemValue->getProperty('quantity', 1)
                ]);

            });

        return $invoice;
    }

    /**
     * @param Invoice $invoice
     */
    public function deleteInvoice(Invoice $invoice): void
    {
        $invoice->items()->forceDelete();
        $invoice->forceDelete();
    }

    /**
     * @param Invoice $invoice
     */
    public function cancelInvoice(Invoice $invoice)
    {
        $invoice->update(['status' => 'cancelled']);
    }
}