<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Checkout\Block\Checkout;

use Magento\Customer\Api\CustomerRepositoryInterface as CustomerRepository;
use Magento\Customer\Api\Data\CustomerInterface;
use Magento\Customer\Helper\Address as AddressHelper;
use Magento\Customer\Model\Session;
use Magento\Directory\Helper\Data as DirectoryHelper;
use Magento\Directory\Model\AllowedCountries;
use Magento\Framework\App\ObjectManager;
use Magento\Framework\Exception\LocalizedException;
use Magento\Framework\Exception\NoSuchEntityException;

/**
 * Fields attribute merger.
 *
 * @SuppressWarnings(PHPMD.CookieAndSessionMisuse)
 */
class AttributeMerger
{
    /**
     * Map form element
     *
     * @var array
     */
    protected $formElementMap = [
        'checkbox'    => 'Magento_Ui/js/form/element/select',
        'select'      => 'Magento_Ui/js/form/element/select',
        'textarea'    => 'Magento_Ui/js/form/element/textarea',
        'multiline'   => 'Magento_Ui/js/form/components/group',
        'multiselect' => 'Magento_Ui/js/form/element/multiselect',
        'image' => 'Magento_Ui/js/form/element/media',
        'file' => 'Magento_Ui/js/form/element/media',
    ];

    /**
     * Map template
     *
     * @var array
     */
    protected $templateMap = [
        'image' => 'media',
        'file' => 'media',
    ];

    /**
     * Map input_validation and validation rule from js
     *
     * @var array
     */
    protected $inputValidationMap = [
        'alpha' => 'validate-alpha',
        'numeric' => 'validate-number',
        'alphanumeric' => 'validate-alphanum',
        'alphanum-with-spaces' => 'validate-alphanum-with-spaces',
        'url' => 'validate-url',
        'email' => 'email2',
        'length' => 'validate-length',
    ];

    /**
     * @var AddressHelper
     */
    private $addressHelper;

    /**
     * @var Session
     */
    private $customerSession;

    /**
     * @var CustomerRepository
     */
    private $customerRepository;

    /**
     * @var CustomerInterface
     */
    private $customer;

    /**
     * @var \Magento\Directory\Helper\Data
     */
    private $directoryHelper;

    /**
     * List of codes of countries that must be shown on the top of country list
     *
     * @var array
     */
    private $topCountryCodes;

    /**
     * @var AllowedCountries|null
     */
    private $allowedCountryReader;

    /**
     * @param AddressHelper $addressHelper
     * @param Session $customerSession
     * @param CustomerRepository $customerRepository
     * @param DirectoryHelper $directoryHelper
     * @param AllowedCountries $allowedCountryReader
     */
    public function __construct(
        AddressHelper $addressHelper,
        Session $customerSession,
        CustomerRepository $customerRepository,
        DirectoryHelper $directoryHelper,
        ?AllowedCountries $allowedCountryReader = null
    ) {
        $this->addressHelper = $addressHelper;
        $this->customerSession = $customerSession;
        $this->customerRepository = $customerRepository;
        $this->directoryHelper = $directoryHelper;
        $this->topCountryCodes = $directoryHelper->getTopCountryCodes();
        $this->allowedCountryReader =
            $allowedCountryReader ?: ObjectManager::getInstance()->get(AllowedCountries::class);
    }

    /**
     * Merge additional address fields for given provider
     *
     * @param array $elements
     * @param string $providerName name of the storage container used by UI component
     * @param string $dataScopePrefix
     * @param array $fields
     * @return array
     */
    public function merge($elements, $providerName, $dataScopePrefix, array $fields = [])
    {
        foreach ($elements as $attributeCode => $attributeConfig) {
            $additionalConfig = isset($fields[$attributeCode]) ? $fields[$attributeCode] : [];
            if (!$this->isFieldVisible($attributeCode, $attributeConfig, $additionalConfig)) {
                continue;
            }
            $fields[$attributeCode] = $this->getFieldConfig(
                $attributeCode,
                $attributeConfig,
                $additionalConfig,
                $providerName,
                $dataScopePrefix
            );
        }
        return $fields;
    }

    /**
     * Retrieve UI field configuration for given attribute
     *
     * @param string $attributeCode
     * @param array $attributeConfig
     * @param array $additionalConfig field configuration provided via layout XML
     * @param string $providerName name of the storage container used by UI component
     * @param string $dataScopePrefix
     * @return array
     * @SuppressWarnings(PHPMD.CyclomaticComplexity)
     * @SuppressWarnings(PHPMD.NPathComplexity)
     */
    protected function getFieldConfig(
        $attributeCode,
        array $attributeConfig,
        array $additionalConfig,
        $providerName,
        $dataScopePrefix
    ) {
        // street attribute is unique in terms of configuration, so it has its own configuration builder
        if (isset($attributeConfig['validation']['input_validation'])) {
            $validationRule = $attributeConfig['validation']['input_validation'];
            $attributeConfig['validation'][$this->inputValidationMap[$validationRule]] = true;
            unset($attributeConfig['validation']['input_validation']);
        }

        if ($attributeConfig['formElement'] == 'multiline') {
            return $this->getMultilineFieldConfig($attributeCode, $attributeConfig, $providerName, $dataScopePrefix);
        }

        $uiComponent = isset($this->formElementMap[$attributeConfig['formElement']])
            ? $this->formElementMap[$attributeConfig['formElement']]
            : 'Magento_Ui/js/form/element/abstract';
        $elementTemplate = isset($this->templateMap[$attributeConfig['formElement']])
            ? 'ui/form/element/' . $this->templateMap[$attributeConfig['formElement']]
            : 'ui/form/element/' . $attributeConfig['formElement'];

        $element = [
            'component' => isset($additionalConfig['component']) ? $additionalConfig['component'] : $uiComponent,
            'config' => $this->mergeConfigurationNode(
                'config',
                $additionalConfig,
                [
                    'config' => [
                        // customScope is used to group elements within a single
                        // form (e.g. they can be validated separately)
                        'customScope' => $dataScopePrefix,
                        'template' => 'ui/form/field',
                        'elementTmpl' => $elementTemplate,
                    ],
                ]
            ),
            'dataScope' => $dataScopePrefix . '.' . $attributeCode,
            'label' => $attributeConfig['label'],
            'provider' => $providerName,
            'sortOrder' => isset($additionalConfig['sortOrder'])
                ? $additionalConfig['sortOrder']
                : $attributeConfig['sortOrder'],
            'validation' => $this->mergeConfigurationNode('validation', $additionalConfig, $attributeConfig),
            'options' => $this->getFieldOptions($attributeCode, $attributeConfig),
            'filterBy' => isset($additionalConfig['filterBy']) ? $additionalConfig['filterBy'] : null,
            'customEntry' => isset($additionalConfig['customEntry']) ? $additionalConfig['customEntry'] : null,
            'visible' => isset($additionalConfig['visible']) ? $additionalConfig['visible'] : true,
        ];

        if ($attributeCode === 'region_id' || $attributeCode === 'country_id') {
            unset($element['options']);
            $element['deps'] = [$providerName];
            $element['imports'] = [
                'initialOptions' => 'index = ' . $providerName . ':dictionaries.' . $attributeCode,
                'setOptions' => 'index = ' . $providerName . ':dictionaries.' . $attributeCode
            ];
        }

        if (isset($attributeConfig['value']) && $attributeConfig['value'] != null) {
            $element['value'] = $attributeConfig['value'];
        } elseif (isset($attributeConfig['default']) && $attributeConfig['default'] != null) {
            $element['value'] = $attributeConfig['default'];
        } else {
            $defaultValue = $this->getDefaultValue($attributeCode);
            if (null !== $defaultValue) {
                $element['value'] = $defaultValue;
            }
        }
        return $element;
    }

    /**
     * Merge two configuration nodes recursively
     *
     * @param string $nodeName
     * @param array $mainSource
     * @param array $additionalSource
     * @return array
     */
    protected function mergeConfigurationNode($nodeName, array $mainSource, array $additionalSource)
    {
        $mainData = isset($mainSource[$nodeName]) ? $mainSource[$nodeName] : [];
        $additionalData = isset($additionalSource[$nodeName]) ? $additionalSource[$nodeName] : [];
        return array_replace_recursive($additionalData, $mainData);
    }

    /**
     * Check if address attribute is visible on frontend
     *
     * @param string $attributeCode
     * @param array $attributeConfig
     * @param array $additionalConfig field configuration provided via layout XML
     * @return bool
     */
    protected function isFieldVisible($attributeCode, array $attributeConfig, array $additionalConfig = [])
    {
        // TODO move this logic to separate model so it can be customized
        if ($attributeConfig['visible'] == false
            || (isset($additionalConfig['visible']) && $additionalConfig['visible'] == false)
        ) {
            return false;
        }
        if ($attributeCode == 'vat_id' && !$this->addressHelper->isVatAttributeVisible()) {
            return false;
        }
        return true;
    }

    /**
     * Retrieve field configuration for street address attribute
     *
     * @param string $attributeCode
     * @param array $attributeConfig
     * @param string $providerName name of the storage container used by UI component
     * @param string $dataScopePrefix
     * @return array
     */
    protected function getMultilineFieldConfig($attributeCode, array $attributeConfig, $providerName, $dataScopePrefix)
    {
        $lines = [];
        unset($attributeConfig['validation']['required-entry']);
        for ($lineIndex = 0; $lineIndex < (int)$attributeConfig['size']; $lineIndex++) {
            $isFirstLine = $lineIndex === 0;
            $line = [
                'label' => __("%1: Line %2", $attributeConfig['label'], $lineIndex + 1),
                'component' => 'Magento_Ui/js/form/element/abstract',
                'config' => [
                    // customScope is used to group elements within a single form e.g. they can be validated separately
                    'customScope' => $dataScopePrefix,
                    'template' => 'ui/form/field',
                    'elementTmpl' => 'ui/form/element/input'
                ],
                'dataScope' => $lineIndex,
                'provider' => $providerName,
                'validation' => $isFirstLine
                    // phpcs:ignore Magento2.Performance.ForeachArrayMerge
                    ? array_merge(
                        ['required-entry' => (bool)$attributeConfig['required']],
                        $attributeConfig['validation']
                    )
                    : $attributeConfig['validation'],
                'additionalClasses' => $isFirstLine ? 'field' : 'additional'

            ];
            if ($isFirstLine && isset($attributeConfig['default']) && $attributeConfig['default'] != null) {
                $line['value'] = $attributeConfig['default'];
            }
            $lines[] = $line;
        }
        return [
            'component' => 'Magento_Ui/js/form/components/group',
            'label' => $attributeConfig['label'],
            'required' => (bool)$attributeConfig['required'],
            'dataScope' => $dataScopePrefix . '.' . $attributeCode,
            'provider' => $providerName,
            'sortOrder' => $attributeConfig['sortOrder'],
            'type' => 'group',
            'config' => [
                'template' => 'ui/group/group',
                'additionalClasses' => $attributeCode
            ],
            'children' => $lines,
        ];
    }

    /**
     * Returns default attribute value.
     *
     * @param string $attributeCode
     * @throws NoSuchEntityException
     * @throws LocalizedException
     * @return null|string
     */
    protected function getDefaultValue($attributeCode): ?string
    {
        if ($attributeCode === 'country_id') {
            $defaultCountryId = $this->directoryHelper->getDefaultCountry();
            if (!in_array($defaultCountryId, $this->allowedCountryReader->getAllowedCountries())) {
                $defaultCountryId = null;
            }
            return $defaultCountryId;
        }

        $customer = $this->getCustomer();
        if ($customer === null) {
            return null;
        }

        $attributeValue = null;
        switch ($attributeCode) {
            case 'prefix':
                $attributeValue = $customer->getPrefix();
                break;
            case 'firstname':
                $attributeValue = $customer->getFirstname();
                break;
            case 'middlename':
                $attributeValue = $customer->getMiddlename();
                break;
            case 'lastname':
                $attributeValue = $customer->getLastname();
                break;
            case 'suffix':
                $attributeValue = $customer->getSuffix();
                break;
        }

        return $attributeValue;
    }

    /**
     * Returns logged customer.
     *
     * @throws NoSuchEntityException
     * @throws LocalizedException
     * @return CustomerInterface|null
     */
    protected function getCustomer(): ?CustomerInterface
    {
        if (!$this->customer) {
            if ($this->customerSession->isLoggedIn()) {
                $this->customer = $this->customerRepository->getById($this->customerSession->getCustomerId());
            } else {
                return null;
            }
        }
        return $this->customer;
    }

    /**
     * Retrieve field options from attribute configuration
     *
     * @param string $attributeCode
     * @param array $attributeConfig
     * @return array
     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
     */
    protected function getFieldOptions($attributeCode, array $attributeConfig)
    {
        return isset($attributeConfig['options']) ? $attributeConfig['options'] : [];
    }

    /**
     * Order country options. Move top countries to the beginning of the list.
     *
     * @param array $countryOptions
     * @return array
     * @deprecated 100.1.7
     */
    protected function orderCountryOptions(array $countryOptions)
    {
        if (empty($this->topCountryCodes)) {
            return $countryOptions;
        }

        $headOptions = [];
        $tailOptions = [[
            'value' => 'delimiter',
            'label' => '──────────',
            'disabled' => true,
        ]];
        foreach ($countryOptions as $countryOption) {
            if (empty($countryOption['value']) || in_array($countryOption['value'], $this->topCountryCodes)) {
                $headOptions[] = $countryOption;
            } else {
                $tailOptions[] = $countryOption;
            }
        }
        return array_merge($headOptions, $tailOptions);
    }
}
