<?php
/**
 * EOrder
 *
 * PHP version 8.1
 *
 * @category Class
 * @package  Europharmacy\EuromedicaClient
 * @author   OpenAPI Generator team
 * @link     https://openapi-generator.tech
 */

/**
 * Euromedica Two Web Api
 *
 * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
 *
 * The version of the OpenAPI document: v1
 * Contact: development@europharmacy.gr
 * Generated by: https://openapi-generator.tech
 * Generator version: 7.20.0
 */

/**
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
 * https://openapi-generator.tech
 * Do not edit the class manually.
 */

namespace Europharmacy\EuromedicaClient\Model;

use \ArrayAccess;
use \Europharmacy\EuromedicaClient\ObjectSerializer;

/**
 * EOrder Class Doc Comment
 *
 * @category Class
 * @package  Europharmacy\EuromedicaClient
 * @author   OpenAPI Generator team
 * @link     https://openapi-generator.tech
 * @implements \ArrayAccess<string, mixed>
 */
class EOrder implements ModelInterface, ArrayAccess, \JsonSerializable
{
    public const DISCRIMINATOR = null;

    /**
      * The original name of the model.
      *
      * @var string
      */
    protected static $openAPIModelName = 'EOrder';

    /**
      * Array of property to type mappings. Used for (de)serialization
      *
      * @var string[]
      */
    protected static $openAPITypes = [
        'order_id' => 'int',
        'status_id' => 'int',
        'admin_url' => 'string',
        'status' => 'string',
        'date_created' => '\DateTime',
        'date_completed' => '\DateTime',
        'date_modified' => '\DateTime',
        'date_paid' => '\DateTime',
        'payment_method_id' => 'int',
        'payment_method' => 'string',
        'shipping_method' => 'string',
        'client_id' => 'int',
        'notes' => 'string',
        'net_amount' => 'float',
        'vat_amount' => 'float',
        'total_amount' => 'float',
        'billing' => '\Europharmacy\EuromedicaClient\Model\Billing',
        'shipping' => '\Europharmacy\EuromedicaClient\Model\Shipping',
        'items' => '\Europharmacy\EuromedicaClient\Model\Items',
        'fees' => '\Europharmacy\EuromedicaClient\Model\Fees',
        'coupons' => '\Europharmacy\EuromedicaClient\Model\Coupons'
    ];

    /**
      * Array of property to format mappings. Used for (de)serialization
      *
      * @var string[]
      * @phpstan-var array<string, string|null>
      * @psalm-var array<string, string|null>
      */
    protected static $openAPIFormats = [
        'order_id' => 'int32',
        'status_id' => 'int32',
        'admin_url' => null,
        'status' => null,
        'date_created' => 'date-time',
        'date_completed' => 'date-time',
        'date_modified' => 'date-time',
        'date_paid' => 'date-time',
        'payment_method_id' => 'int32',
        'payment_method' => null,
        'shipping_method' => null,
        'client_id' => 'int32',
        'notes' => null,
        'net_amount' => 'double',
        'vat_amount' => 'double',
        'total_amount' => 'double',
        'billing' => null,
        'shipping' => null,
        'items' => null,
        'fees' => null,
        'coupons' => null
    ];

    /**
      * Array of nullable properties. Used for (de)serialization
      *
      * @var boolean[]
      */
    protected static array $openAPINullables = [
        'order_id' => false,
        'status_id' => false,
        'admin_url' => true,
        'status' => true,
        'date_created' => false,
        'date_completed' => true,
        'date_modified' => true,
        'date_paid' => true,
        'payment_method_id' => false,
        'payment_method' => true,
        'shipping_method' => true,
        'client_id' => false,
        'notes' => true,
        'net_amount' => true,
        'vat_amount' => true,
        'total_amount' => false,
        'billing' => false,
        'shipping' => false,
        'items' => false,
        'fees' => false,
        'coupons' => false
    ];

    /**
      * If a nullable field gets set to null, insert it here
      *
      * @var boolean[]
      */
    protected array $openAPINullablesSetToNull = [];

    /**
     * Array of property to type mappings. Used for (de)serialization
     *
     * @return array
     */
    public static function openAPITypes()
    {
        return self::$openAPITypes;
    }

    /**
     * Array of property to format mappings. Used for (de)serialization
     *
     * @return array
     */
    public static function openAPIFormats()
    {
        return self::$openAPIFormats;
    }

    /**
     * Array of nullable properties
     *
     * @return array
     */
    protected static function openAPINullables(): array
    {
        return self::$openAPINullables;
    }

    /**
     * Array of nullable field names deliberately set to null
     *
     * @return boolean[]
     */
    private function getOpenAPINullablesSetToNull(): array
    {
        return $this->openAPINullablesSetToNull;
    }

    /**
     * Setter - Array of nullable field names deliberately set to null
     *
     * @param boolean[] $openAPINullablesSetToNull
     */
    private function setOpenAPINullablesSetToNull(array $openAPINullablesSetToNull): void
    {
        $this->openAPINullablesSetToNull = $openAPINullablesSetToNull;
    }

    /**
     * Checks if a property is nullable
     *
     * @param string $property
     * @return bool
     */
    public static function isNullable(string $property): bool
    {
        return self::openAPINullables()[$property] ?? false;
    }

    /**
     * Checks if a nullable property is set to null.
     *
     * @param string $property
     * @return bool
     */
    public function isNullableSetToNull(string $property): bool
    {
        return in_array($property, $this->getOpenAPINullablesSetToNull(), true);
    }

    /**
     * Array of attributes where the key is the local name,
     * and the value is the original name
     *
     * @var string[]
     */
    protected static $attributeMap = [
        'order_id' => 'orderId',
        'status_id' => 'statusId',
        'admin_url' => 'adminUrl',
        'status' => 'status',
        'date_created' => 'dateCreated',
        'date_completed' => 'dateCompleted',
        'date_modified' => 'dateModified',
        'date_paid' => 'datePaid',
        'payment_method_id' => 'paymentMethodId',
        'payment_method' => 'paymentMethod',
        'shipping_method' => 'shippingMethod',
        'client_id' => 'clientId',
        'notes' => 'notes',
        'net_amount' => 'netAmount',
        'vat_amount' => 'vatAmount',
        'total_amount' => 'totalAmount',
        'billing' => 'billing',
        'shipping' => 'shipping',
        'items' => 'items',
        'fees' => 'fees',
        'coupons' => 'coupons'
    ];

    /**
     * Array of attributes to setter functions (for deserialization of responses)
     *
     * @var string[]
     */
    protected static $setters = [
        'order_id' => 'setOrderId',
        'status_id' => 'setStatusId',
        'admin_url' => 'setAdminUrl',
        'status' => 'setStatus',
        'date_created' => 'setDateCreated',
        'date_completed' => 'setDateCompleted',
        'date_modified' => 'setDateModified',
        'date_paid' => 'setDatePaid',
        'payment_method_id' => 'setPaymentMethodId',
        'payment_method' => 'setPaymentMethod',
        'shipping_method' => 'setShippingMethod',
        'client_id' => 'setClientId',
        'notes' => 'setNotes',
        'net_amount' => 'setNetAmount',
        'vat_amount' => 'setVatAmount',
        'total_amount' => 'setTotalAmount',
        'billing' => 'setBilling',
        'shipping' => 'setShipping',
        'items' => 'setItems',
        'fees' => 'setFees',
        'coupons' => 'setCoupons'
    ];

    /**
     * Array of attributes to getter functions (for serialization of requests)
     *
     * @var string[]
     */
    protected static $getters = [
        'order_id' => 'getOrderId',
        'status_id' => 'getStatusId',
        'admin_url' => 'getAdminUrl',
        'status' => 'getStatus',
        'date_created' => 'getDateCreated',
        'date_completed' => 'getDateCompleted',
        'date_modified' => 'getDateModified',
        'date_paid' => 'getDatePaid',
        'payment_method_id' => 'getPaymentMethodId',
        'payment_method' => 'getPaymentMethod',
        'shipping_method' => 'getShippingMethod',
        'client_id' => 'getClientId',
        'notes' => 'getNotes',
        'net_amount' => 'getNetAmount',
        'vat_amount' => 'getVatAmount',
        'total_amount' => 'getTotalAmount',
        'billing' => 'getBilling',
        'shipping' => 'getShipping',
        'items' => 'getItems',
        'fees' => 'getFees',
        'coupons' => 'getCoupons'
    ];

    /**
     * Array of attributes where the key is the local name,
     * and the value is the original name
     *
     * @return array
     */
    public static function attributeMap()
    {
        return self::$attributeMap;
    }

    /**
     * Array of attributes to setter functions (for deserialization of responses)
     *
     * @return array
     */
    public static function setters()
    {
        return self::$setters;
    }

    /**
     * Array of attributes to getter functions (for serialization of requests)
     *
     * @return array
     */
    public static function getters()
    {
        return self::$getters;
    }

    /**
     * The original name of the model.
     *
     * @return string
     */
    public function getModelName()
    {
        return self::$openAPIModelName;
    }


    /**
     * Associative array for storing property values
     *
     * @var mixed[]
     */
    protected $container = [];

    /**
     * Constructor
     *
     * @param mixed[]|null $data Associated array of property values
     *                      initializing the model
     */
    public function __construct(?array $data = null)
    {
        $this->setIfExists('order_id', $data ?? [], null);
        $this->setIfExists('status_id', $data ?? [], null);
        $this->setIfExists('admin_url', $data ?? [], null);
        $this->setIfExists('status', $data ?? [], null);
        $this->setIfExists('date_created', $data ?? [], null);
        $this->setIfExists('date_completed', $data ?? [], null);
        $this->setIfExists('date_modified', $data ?? [], null);
        $this->setIfExists('date_paid', $data ?? [], null);
        $this->setIfExists('payment_method_id', $data ?? [], null);
        $this->setIfExists('payment_method', $data ?? [], null);
        $this->setIfExists('shipping_method', $data ?? [], null);
        $this->setIfExists('client_id', $data ?? [], null);
        $this->setIfExists('notes', $data ?? [], null);
        $this->setIfExists('net_amount', $data ?? [], null);
        $this->setIfExists('vat_amount', $data ?? [], null);
        $this->setIfExists('total_amount', $data ?? [], null);
        $this->setIfExists('billing', $data ?? [], null);
        $this->setIfExists('shipping', $data ?? [], null);
        $this->setIfExists('items', $data ?? [], null);
        $this->setIfExists('fees', $data ?? [], null);
        $this->setIfExists('coupons', $data ?? [], null);
    }

    /**
    * Sets $this->container[$variableName] to the given data or to the given default Value; if $variableName
    * is nullable and its value is set to null in the $fields array, then mark it as "set to null" in the
    * $this->openAPINullablesSetToNull array
    *
    * @param string $variableName
    * @param array  $fields
    * @param mixed  $defaultValue
    */
    private function setIfExists(string $variableName, array $fields, $defaultValue): void
    {
        if (self::isNullable($variableName) && array_key_exists($variableName, $fields) && is_null($fields[$variableName])) {
            $this->openAPINullablesSetToNull[] = $variableName;
        }

        $this->container[$variableName] = $fields[$variableName] ?? $defaultValue;
    }

    /**
     * Show all the invalid properties with reasons.
     *
     * @return array invalid properties with reasons
     */
    public function listInvalidProperties()
    {
        $invalidProperties = [];

        if (!is_null($this->container['status_id']) && ($this->container['status_id'] > 8)) {
            $invalidProperties[] = "invalid value for 'status_id', must be smaller than or equal to 8.";
        }

        if (!is_null($this->container['status_id']) && ($this->container['status_id'] < 1)) {
            $invalidProperties[] = "invalid value for 'status_id', must be bigger than or equal to 1.";
        }

        if (!is_null($this->container['payment_method_id']) && ($this->container['payment_method_id'] > 6)) {
            $invalidProperties[] = "invalid value for 'payment_method_id', must be smaller than or equal to 6.";
        }

        if (!is_null($this->container['payment_method_id']) && ($this->container['payment_method_id'] < 1)) {
            $invalidProperties[] = "invalid value for 'payment_method_id', must be bigger than or equal to 1.";
        }

        return $invalidProperties;
    }

    /**
     * Validate all the properties in the model
     * return true if all passed
     *
     * @return bool True if all properties are valid
     */
    public function valid()
    {
        return count($this->listInvalidProperties()) === 0;
    }


    /**
     * Gets order_id
     *
     * @return int|null
     */
    public function getOrderId()
    {
        return $this->container['order_id'];
    }

    /**
     * Sets order_id
     *
     * @param int|null $order_id order_id
     *
     * @return self
     */
    public function setOrderId($order_id)
    {
        if (is_null($order_id)) {
            throw new \InvalidArgumentException('non-nullable order_id cannot be null');
        }
        $this->container['order_id'] = $order_id;

        return $this;
    }

    /**
     * Gets status_id
     *
     * @return int|null
     */
    public function getStatusId()
    {
        return $this->container['status_id'];
    }

    /**
     * Sets status_id
     *
     * @param int|null $status_id ΚΑΤΑΣΤΑΣΗ ΠΑΡΑΓΓΕΛΙΑΣ   {1,\"Σε διεκπεραίωση\" },  {2,\"Εκκρεμεί πληρωμή\" },  {3,\"Ολοκληρωμένη\" },   { 4,\"Αναμονή τραπεζικής πληρώμης\" },   { 5,\"Αποτυχία πληρωμής\" },  { 6,\"Ακυρωμένη\" },  { 7,\"Επιστροφή χρημάτων\" },   { 8,\"Τιμολογημένη\" }
     *
     * @return self
     */
    public function setStatusId($status_id)
    {
        if (is_null($status_id)) {
            throw new \InvalidArgumentException('non-nullable status_id cannot be null');
        }

        if (($status_id > 8)) {
            throw new \InvalidArgumentException('invalid value for $status_id when calling EOrder., must be smaller than or equal to 8.');
        }
        if (($status_id < 1)) {
            throw new \InvalidArgumentException('invalid value for $status_id when calling EOrder., must be bigger than or equal to 1.');
        }

        $this->container['status_id'] = $status_id;

        return $this;
    }

    /**
     * Gets admin_url
     *
     * @return string|null
     */
    public function getAdminUrl()
    {
        return $this->container['admin_url'];
    }

    /**
     * Sets admin_url
     *
     * @param string|null $admin_url προαιρετικό  πεδίο  ,  διαχειριστικό eshop
     *
     * @return self
     */
    public function setAdminUrl($admin_url)
    {
        if (is_null($admin_url)) {
            array_push($this->openAPINullablesSetToNull, 'admin_url');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('admin_url', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['admin_url'] = $admin_url;

        return $this;
    }

    /**
     * Gets status
     *
     * @return string|null
     */
    public function getStatus()
    {
        return $this->container['status'];
    }

    /**
     * Sets status
     *
     * @param string|null $status προαιρετικό πεδίο ,  λεκτικό της κατάστασης
     *
     * @return self
     */
    public function setStatus($status)
    {
        if (is_null($status)) {
            array_push($this->openAPINullablesSetToNull, 'status');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('status', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['status'] = $status;

        return $this;
    }

    /**
     * Gets date_created
     *
     * @return \DateTime|null
     */
    public function getDateCreated()
    {
        return $this->container['date_created'];
    }

    /**
     * Sets date_created
     *
     * @param \DateTime|null $date_created date_created
     *
     * @return self
     */
    public function setDateCreated($date_created)
    {
        if (is_null($date_created)) {
            throw new \InvalidArgumentException('non-nullable date_created cannot be null');
        }
        $this->container['date_created'] = $date_created;

        return $this;
    }

    /**
     * Gets date_completed
     *
     * @return \DateTime|null
     */
    public function getDateCompleted()
    {
        return $this->container['date_completed'];
    }

    /**
     * Sets date_completed
     *
     * @param \DateTime|null $date_completed συμπληρώνεται από το erp όταν ολοκληρωθεί η παραγγελία
     *
     * @return self
     */
    public function setDateCompleted($date_completed)
    {
        if (is_null($date_completed)) {
            array_push($this->openAPINullablesSetToNull, 'date_completed');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('date_completed', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['date_completed'] = $date_completed;

        return $this;
    }

    /**
     * Gets date_modified
     *
     * @return \DateTime|null
     */
    public function getDateModified()
    {
        return $this->container['date_modified'];
    }

    /**
     * Sets date_modified
     *
     * @param \DateTime|null $date_modified 
     *
     * @return self
     */
    public function setDateModified($date_modified)
    {
        if (is_null($date_modified)) {
            array_push($this->openAPINullablesSetToNull, 'date_modified');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('date_modified', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['date_modified'] = $date_modified;

        return $this;
    }

    /**
     * Gets date_paid
     *
     * @return \DateTime|null
     */
    public function getDatePaid()
    {
        return $this->container['date_paid'];
    }

    /**
     * Sets date_paid
     *
     * @param \DateTime|null $date_paid συμπληρώνεται από το eshop οταν γίνει πληρωμή με κάρτα
     *
     * @return self
     */
    public function setDatePaid($date_paid)
    {
        if (is_null($date_paid)) {
            array_push($this->openAPINullablesSetToNull, 'date_paid');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('date_paid', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['date_paid'] = $date_paid;

        return $this;
    }

    /**
     * Gets payment_method_id
     *
     * @return int|null
     */
    public function getPaymentMethodId()
    {
        return $this->container['payment_method_id'];
    }

    /**
     * Sets payment_method_id
     *
     * @param int|null $payment_method_id ΤΡΟΠΟΙ ΠΛΗΡΩΜΗΣ   { 1 ,\"Aντικαταβολή\" },{ 2 ,\"Τραπεζική κατάθεση\" },  { 3 ,\"Paypal\" }, { 4 ,\"Πιστ./Χρεωσ. Κάρτα\" },{ 5 ,\"Κατάστημα\" },{ 6 ,\"Eshop\" }
     *
     * @return self
     */
    public function setPaymentMethodId($payment_method_id)
    {
        if (is_null($payment_method_id)) {
            throw new \InvalidArgumentException('non-nullable payment_method_id cannot be null');
        }

        if (($payment_method_id > 6)) {
            throw new \InvalidArgumentException('invalid value for $payment_method_id when calling EOrder., must be smaller than or equal to 6.');
        }
        if (($payment_method_id < 1)) {
            throw new \InvalidArgumentException('invalid value for $payment_method_id when calling EOrder., must be bigger than or equal to 1.');
        }

        $this->container['payment_method_id'] = $payment_method_id;

        return $this;
    }

    /**
     * Gets payment_method
     *
     * @return string|null
     */
    public function getPaymentMethod()
    {
        return $this->container['payment_method'];
    }

    /**
     * Sets payment_method
     *
     * @param string|null $payment_method προαιρετικό πεδίο ,  λεκτικό του τρόπου πληρωμής
     *
     * @return self
     */
    public function setPaymentMethod($payment_method)
    {
        if (is_null($payment_method)) {
            array_push($this->openAPINullablesSetToNull, 'payment_method');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('payment_method', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['payment_method'] = $payment_method;

        return $this;
    }

    /**
     * Gets shipping_method
     *
     * @return string|null
     */
    public function getShippingMethod()
    {
        return $this->container['shipping_method'];
    }

    /**
     * Sets shipping_method
     *
     * @param string|null $shipping_method Τρόπος αποστολής
     *
     * @return self
     */
    public function setShippingMethod($shipping_method)
    {
        if (is_null($shipping_method)) {
            array_push($this->openAPINullablesSetToNull, 'shipping_method');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('shipping_method', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['shipping_method'] = $shipping_method;

        return $this;
    }

    /**
     * Gets client_id
     *
     * @return int|null
     */
    public function getClientId()
    {
        return $this->container['client_id'];
    }

    /**
     * Sets client_id
     *
     * @param int|null $client_id το id πελατη στο eshop  , επισκέπτης -1
     *
     * @return self
     */
    public function setClientId($client_id)
    {
        if (is_null($client_id)) {
            throw new \InvalidArgumentException('non-nullable client_id cannot be null');
        }
        $this->container['client_id'] = $client_id;

        return $this;
    }

    /**
     * Gets notes
     *
     * @return string|null
     */
    public function getNotes()
    {
        return $this->container['notes'];
    }

    /**
     * Sets notes
     *
     * @param string|null $notes notes
     *
     * @return self
     */
    public function setNotes($notes)
    {
        if (is_null($notes)) {
            array_push($this->openAPINullablesSetToNull, 'notes');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('notes', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['notes'] = $notes;

        return $this;
    }

    /**
     * Gets net_amount
     *
     * @return float|null
     */
    public function getNetAmount()
    {
        return $this->container['net_amount'];
    }

    /**
     * Sets net_amount
     *
     * @param float|null $net_amount προαιρετικό πεδίο , Αξία παραγγελίας προ ΦΠΑ
     *
     * @return self
     */
    public function setNetAmount($net_amount)
    {
        if (is_null($net_amount)) {
            array_push($this->openAPINullablesSetToNull, 'net_amount');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('net_amount', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['net_amount'] = $net_amount;

        return $this;
    }

    /**
     * Gets vat_amount
     *
     * @return float|null
     */
    public function getVatAmount()
    {
        return $this->container['vat_amount'];
    }

    /**
     * Sets vat_amount
     *
     * @param float|null $vat_amount προαιρετικό πεδίο , Αξία  ΦΠΑ
     *
     * @return self
     */
    public function setVatAmount($vat_amount)
    {
        if (is_null($vat_amount)) {
            array_push($this->openAPINullablesSetToNull, 'vat_amount');
        } else {
            $nullablesSetToNull = $this->getOpenAPINullablesSetToNull();
            $index = array_search('vat_amount', $nullablesSetToNull);
            if ($index !== FALSE) {
                unset($nullablesSetToNull[$index]);
                $this->setOpenAPINullablesSetToNull($nullablesSetToNull);
            }
        }
        $this->container['vat_amount'] = $vat_amount;

        return $this;
    }

    /**
     * Gets total_amount
     *
     * @return float|null
     */
    public function getTotalAmount()
    {
        return $this->container['total_amount'];
    }

    /**
     * Sets total_amount
     *
     * @param float|null $total_amount Συνολική αξία παραγγελίας
     *
     * @return self
     */
    public function setTotalAmount($total_amount)
    {
        if (is_null($total_amount)) {
            throw new \InvalidArgumentException('non-nullable total_amount cannot be null');
        }
        $this->container['total_amount'] = $total_amount;

        return $this;
    }

    /**
     * Gets billing
     *
     * @return \Europharmacy\EuromedicaClient\Model\Billing|null
     */
    public function getBilling()
    {
        return $this->container['billing'];
    }

    /**
     * Sets billing
     *
     * @param \Europharmacy\EuromedicaClient\Model\Billing|null $billing billing
     *
     * @return self
     */
    public function setBilling($billing)
    {
        if (is_null($billing)) {
            throw new \InvalidArgumentException('non-nullable billing cannot be null');
        }
        $this->container['billing'] = $billing;

        return $this;
    }

    /**
     * Gets shipping
     *
     * @return \Europharmacy\EuromedicaClient\Model\Shipping|null
     */
    public function getShipping()
    {
        return $this->container['shipping'];
    }

    /**
     * Sets shipping
     *
     * @param \Europharmacy\EuromedicaClient\Model\Shipping|null $shipping shipping
     *
     * @return self
     */
    public function setShipping($shipping)
    {
        if (is_null($shipping)) {
            throw new \InvalidArgumentException('non-nullable shipping cannot be null');
        }
        $this->container['shipping'] = $shipping;

        return $this;
    }

    /**
     * Gets items
     *
     * @return \Europharmacy\EuromedicaClient\Model\Items|null
     */
    public function getItems()
    {
        return $this->container['items'];
    }

    /**
     * Sets items
     *
     * @param \Europharmacy\EuromedicaClient\Model\Items|null $items items
     *
     * @return self
     */
    public function setItems($items)
    {
        if (is_null($items)) {
            throw new \InvalidArgumentException('non-nullable items cannot be null');
        }
        $this->container['items'] = $items;

        return $this;
    }

    /**
     * Gets fees
     *
     * @return \Europharmacy\EuromedicaClient\Model\Fees|null
     */
    public function getFees()
    {
        return $this->container['fees'];
    }

    /**
     * Sets fees
     *
     * @param \Europharmacy\EuromedicaClient\Model\Fees|null $fees fees
     *
     * @return self
     */
    public function setFees($fees)
    {
        if (is_null($fees)) {
            throw new \InvalidArgumentException('non-nullable fees cannot be null');
        }
        $this->container['fees'] = $fees;

        return $this;
    }

    /**
     * Gets coupons
     *
     * @return \Europharmacy\EuromedicaClient\Model\Coupons|null
     */
    public function getCoupons()
    {
        return $this->container['coupons'];
    }

    /**
     * Sets coupons
     *
     * @param \Europharmacy\EuromedicaClient\Model\Coupons|null $coupons coupons
     *
     * @return self
     */
    public function setCoupons($coupons)
    {
        if (is_null($coupons)) {
            throw new \InvalidArgumentException('non-nullable coupons cannot be null');
        }
        $this->container['coupons'] = $coupons;

        return $this;
    }
    /**
     * Returns true if offset exists. False otherwise.
     *
     * @param integer|string $offset Offset
     *
     * @return boolean
     */
    public function offsetExists(mixed $offset): bool
    {
        return isset($this->container[$offset]);
    }

    /**
     * Gets offset.
     *
     * @param integer|string $offset Offset
     *
     * @return mixed|null
     */
    #[\ReturnTypeWillChange]
    public function offsetGet(mixed $offset)
    {
        return $this->container[$offset] ?? null;
    }

    /**
     * Sets value based on offset.
     *
     * @param int|null $offset Offset
     * @param mixed    $value  Value to be set
     *
     * @return void
     */
    public function offsetSet($offset, $value): void
    {
        if (is_null($offset)) {
            $this->container[] = $value;
        } else {
            $this->container[$offset] = $value;
        }
    }

    /**
     * Unsets offset.
     *
     * @param integer|string $offset Offset
     *
     * @return void
     */
    public function offsetUnset(mixed $offset): void
    {
        unset($this->container[$offset]);
    }

    /**
     * Serializes the object to a value that can be serialized natively by json_encode().
     * @link https://www.php.net/manual/en/jsonserializable.jsonserialize.php
     *
     * @return mixed Returns data which can be serialized by json_encode(), which is a value
     * of any type other than a resource.
     */
    #[\ReturnTypeWillChange]
    public function jsonSerialize()
    {
       return ObjectSerializer::sanitizeForSerialization($this);
    }

    /**
     * Gets the string presentation of the object
     *
     * @return string
     */
    public function __toString()
    {
        return json_encode(
            ObjectSerializer::sanitizeForSerialization($this),
            JSON_PRETTY_PRINT
        );
    }

    /**
     * Gets a header-safe presentation of the object
     *
     * @return string
     */
    public function toHeaderValue()
    {
        return json_encode(ObjectSerializer::sanitizeForSerialization($this));
    }
}