<?php
namespace Domain\Integrations;

class IntegrationsRepository
{
    private $db;

    private const SETTINGS_TABLES = [
        'apilo'  => 'pp_shop_apilo_settings',
        'shoppro' => 'pp_shop_shoppro_settings',
    ];

    public function __construct( $db )
    {
        $this->db = $db;
    }

    // ── Settings ────────────────────────────────────────────────

    private function settingsTable( string $provider ): string
    {
        if ( !isset( self::SETTINGS_TABLES[$provider] ) )
            throw new \InvalidArgumentException( "Unknown provider: $provider" );

        return self::SETTINGS_TABLES[$provider];
    }

    public function getSettings( string $provider ): array
    {
        $table = $this->settingsTable( $provider );
        $results = $this->db->query( "SELECT * FROM $table" )->fetchAll( \PDO::FETCH_ASSOC );
        $settings = [];
        foreach ( $results as $row )
            $settings[$row['name']] = $row['value'];

        return $settings;
    }

    public function getSetting( string $provider, string $name ): ?string
    {
        $table = $this->settingsTable( $provider );
        $value = $this->db->get( $table, 'value', [ 'name' => $name ] );
        return $value !== false ? $value : null;
    }

    public function saveSetting( string $provider, string $name, $value ): bool
    {
        $table = $this->settingsTable( $provider );
        if ( $this->db->count( $table, [ 'name' => $name ] ) ) {
            $this->db->update( $table, [ 'value' => $value ], [ 'name' => $name ] );
        } else {
            $this->db->insert( $table, [ 'name' => $name, 'value' => $value ] );
        }
        \S::delete_dir('../temp/');
        return true;
    }

    // ── Product linking (Apilo) ─────────────────────────────────

    public function linkProduct( int $productId, $externalId, $externalName ): bool
    {
        return (bool) $this->db->update( 'pp_shop_products', [
            'apilo_product_id'   => $externalId,
            'apilo_product_name' => \S::remove_special_chars( $externalName ),
        ], [ 'id' => $productId ] );
    }

    public function unlinkProduct( int $productId ): bool
    {
        return (bool) $this->db->update( 'pp_shop_products', [
            'apilo_product_id'   => null,
            'apilo_product_name' => null,
        ], [ 'id' => $productId ] );
    }

    // ── Apilo OAuth ─────────────────────────────────────────────

    public function apiloAuthorize( string $clientId, string $clientSecret, string $authCode ): bool
    {
        $postData = [
            'grantType' => 'authorization_code',
            'token'     => $authCode,
        ];

        $ch = curl_init( "https://projectpro.apilo.com/rest/auth/token/" );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
        curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $postData ) );
        curl_setopt( $ch, CURLOPT_HTTPHEADER, [
            "Authorization: Basic " . base64_encode( $clientId . ":" . $clientSecret ),
            "Accept: application/json"
        ] );

        $response = curl_exec( $ch );
        if ( curl_errno( $ch ) ) {
            curl_close( $ch );
            return false;
        }
        curl_close( $ch );
        $response = json_decode( $response, true );

        if ( empty( $response['accessToken'] ) )
            return false;

        $this->saveSetting( 'apilo', 'access-token', $response['accessToken'] );
        $this->saveSetting( 'apilo', 'refresh-token', $response['refreshToken'] );
        $this->saveSetting( 'apilo', 'access-token-expire-at', $response['accessTokenExpireAt'] );
        $this->saveSetting( 'apilo', 'refresh-token-expire-at', $response['refreshTokenExpireAt'] );

        return true;
    }

    public function apiloGetAccessToken(): ?string
    {
        $settings = $this->getSettings( 'apilo' );

        if ( empty( $settings['access-token-expire-at'] ) || empty( $settings['access-token'] ) )
            return null;

        $expireAt = new \DateTime( $settings['access-token-expire-at'] );
        $now = new \DateTime( date( 'Y-m-d H:i:s' ) );

        if ( $expireAt >= $now )
            return $settings['access-token'];

        // Token expired - refresh
        $postData = [
            'grantType' => 'refresh_token',
            'token'     => $settings['refresh-token'],
        ];

        $ch = curl_init( "https://projectpro.apilo.com/rest/auth/token/" );
        curl_setopt( $ch, CURLOPT_HTTPHEADER, [
            "Authorization: Basic " . base64_encode( $settings['client-id'] . ":" . $settings['client-secret'] ),
            "Accept: application/json"
        ] );
        curl_setopt( $ch, CURLOPT_POST, true );
        curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( $postData ) );
        curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );

        $response = curl_exec( $ch );
        if ( curl_errno( $ch ) ) {
            curl_close( $ch );
            return null;
        }
        curl_close( $ch );
        $response = json_decode( $response, true );

        if ( empty( $response['accessToken'] ) )
            return null;

        $this->saveSetting( 'apilo', 'access-token', $response['accessToken'] );
        $this->saveSetting( 'apilo', 'refresh-token', $response['refreshToken'] );
        $this->saveSetting( 'apilo', 'access-token-expire-at', $response['accessTokenExpireAt'] );
        $this->saveSetting( 'apilo', 'refresh-token-expire-at', $response['refreshTokenExpireAt'] );

        return $response['accessToken'];
    }

    // ── Apilo API fetch lists ───────────────────────────────────

    private const APILO_ENDPOINTS = [
        'platform' => 'https://projectpro.apilo.com/rest/api/orders/platform/map/',
        'status'   => 'https://projectpro.apilo.com/rest/api/orders/status/map/',
        'carrier'  => 'https://projectpro.apilo.com/rest/api/orders/carrier-account/map/',
        'payment'  => 'https://projectpro.apilo.com/rest/api/orders/payment/map/',
    ];

    private const APILO_SETTINGS_KEYS = [
        'platform' => 'platform-list',
        'status'   => 'status-types-list',
        'carrier'  => 'carrier-account-list',
        'payment'  => 'payment-types-list',
    ];

    /**
     * Fetch list from Apilo API and save to settings.
     * @param string $type  platform|status|carrier|payment
     */
    public function apiloFetchList( string $type ): bool
    {
        if ( !isset( self::APILO_ENDPOINTS[$type] ) )
            throw new \InvalidArgumentException( "Unknown apilo list type: $type" );

        $accessToken = $this->apiloGetAccessToken();
        if ( !$accessToken )
            return false;

        $ch = curl_init( self::APILO_ENDPOINTS[$type] );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $ch, CURLOPT_HTTPHEADER, [
            "Authorization: Bearer " . $accessToken,
            "Accept: application/json"
        ] );

        $response = curl_exec( $ch );
        if ( curl_errno( $ch ) ) {
            curl_close( $ch );
            return false;
        }
        curl_close( $ch );

        $data = json_decode( $response, true );
        if ( !$data )
            return false;

        $this->saveSetting( 'apilo', self::APILO_SETTINGS_KEYS[$type], $data );
        return true;
    }

    // ── Apilo product operations ────────────────────────────────

    public function getProductSku( int $productId ): ?string
    {
        $sku = $this->db->get( 'pp_shop_products', 'sku', [ 'id' => $productId ] );
        return $sku ?: null;
    }

    public function apiloProductSearch( string $sku ): array
    {
        $accessToken = $this->apiloGetAccessToken();
        if ( !$accessToken )
            return [ 'status' => 'error', 'msg' => 'Brak tokenu Apilo.' ];

        $url = "https://projectpro.apilo.com/rest/api/warehouse/product/?" . http_build_query( [ 'sku' => $sku ] );

        $ch = curl_init( $url );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
        curl_setopt( $ch, CURLOPT_HTTPHEADER, [
            "Authorization: Bearer " . $accessToken,
            "Accept: application/json"
        ] );

        $response = curl_exec( $ch );
        if ( curl_errno( $ch ) ) {
            curl_close( $ch );
            return [ 'status' => 'error', 'msg' => 'Błąd cURL: ' . curl_error( $ch ) ];
        }
        curl_close( $ch );

        $data = json_decode( $response, true );
        if ( $data && isset( $data['products'] ) ) {
            $data['status'] = 'SUCCESS';
            return $data;
        }

        return [ 'status' => 'SUCCESS', 'msg' => 'Brak wyników dla podanego SKU.', 'products' => '' ];
    }

    public function apiloCreateProduct( int $productId ): array
    {
        $accessToken = $this->apiloGetAccessToken();
        if ( !$accessToken )
            return [ 'success' => false, 'message' => 'Brak tokenu Apilo.' ];

        $product = new \shop\Product( $productId );

        $params = [
            'sku'              => $product->sku,
            'ean'              => $product->ean,
            'name'             => $product->language['name'],
            'tax'              => (int) $product->vat,
            'status'           => 1,
            'quantity'         => (int) $product->quantity,
            'priceWithTax'     => $product->price_brutto,
            'description'      => $product->language['description'] . '<br>' . $product->language['short_description'],
            'shortDescription' => '',
            'images'           => [],
        ];

        foreach ( $product->images as $image )
            $params['images'][] = "https://" . $_SERVER['HTTP_HOST'] . $image['src'];

        $ch = curl_init( "https://projectpro.apilo.com/rest/api/warehouse/product/" );
        curl_setopt( $ch, CURLOPT_POSTFIELDS, json_encode( [ $params ] ) );
        curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, "POST" );
        curl_setopt( $ch, CURLOPT_HTTPHEADER, [
            "Authorization: Bearer " . $accessToken,
            "Content-Type: application/json",
            "Accept: application/json"
        ] );
        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
        $response = curl_exec( $ch );
        $responseData = json_decode( $response, true );

        if ( curl_errno( $ch ) ) {
            $error = curl_error( $ch );
            curl_close( $ch );
            return [ 'success' => false, 'message' => 'Błąd cURL: ' . $error ];
        }
        curl_close( $ch );

        if ( !empty( $responseData['products'] ) ) {
            $this->db->update( 'pp_shop_products', [
                'apilo_product_id'   => reset( $responseData['products'] ),
                'apilo_product_name' => $product->language['name'],
            ], [ 'id' => $product->id ] );

            return [ 'success' => true, 'message' => 'Produkt został dodany do magazynu APILO.' ];
        }

        return [ 'success' => false, 'message' => 'Podczas dodawania produktu wystąpił błąd.' ];
    }

    // ── ShopPRO import ──────────────────────────────────────────

    public function shopproImportProduct( int $productId ): array
    {
        $settings = $this->getSettings( 'shoppro' );

        $mdb2 = new \medoo( [
            'database_type' => 'mysql',
            'database_name' => $settings['db_name'],
            'server'        => $settings['db_host'],
            'username'      => $settings['db_user'],
            'password'      => $settings['db_password'],
            'charset'       => 'utf8'
        ] );

        $product = $mdb2->get( 'pp_shop_products', '*', [ 'id' => $productId ] );
        if ( !$product )
            return [ 'success' => false, 'message' => 'Podczas importowania produktu wystąpił błąd.' ];

        $this->db->insert( 'pp_shop_products', [
            'price_netto'                => $product['price_netto'],
            'price_brutto'               => $product['price_brutto'],
            'vat'                        => $product['vat'],
            'stock_0_buy'                => $product['stock_0_buy'],
            'quantity'                   => $product['quantity'],
            'wp'                         => $product['wp'],
            'sku'                        => $product['sku'],
            'ean'                        => $product['ean'],
            'custom_label_0'             => $product['custom_label_0'],
            'custom_label_1'             => $product['custom_label_1'],
            'custom_label_2'             => $product['custom_label_2'],
            'custom_label_3'             => $product['custom_label_3'],
            'custom_label_4'             => $product['custom_label_4'],
            'additional_message'         => $product['additional_message'],
            'additional_message_text'    => $product['additional_message_text'],
            'additional_message_required'=> $product['additional_message_required'],
            'weight'                     => $product['weight'],
        ] );

        $newProductId = $this->db->id();
        if ( !$newProductId )
            return [ 'success' => false, 'message' => 'Podczas importowania produktu wystąpił błąd.' ];

        // Import translations
        $languages = $mdb2->select( 'pp_shop_products_langs', '*', [ 'product_id' => $productId ] );
        if ( is_array( $languages ) ) {
            foreach ( $languages as $lang ) {
                $this->db->insert( 'pp_shop_products_langs', [
                    'product_id'               => $newProductId,
                    'lang_id'                  => $lang['lang_id'],
                    'name'                     => $lang['name'],
                    'short_description'        => $lang['short_description'],
                    'description'              => $lang['description'],
                    'tab_name_1'               => $lang['tab_name_1'],
                    'tab_description_1'        => $lang['tab_description_1'],
                    'tab_name_2'               => $lang['tab_name_2'],
                    'tab_description_2'        => $lang['tab_description_2'],
                    'meta_title'               => $lang['meta_title'],
                    'meta_description'         => $lang['meta_description'],
                    'meta_keywords'            => $lang['meta_keywords'],
                    'seo_link'                 => $lang['seo_link'],
                    'copy_from'                => $lang['copy_from'],
                    'warehouse_message_zero'   => $lang['warehouse_message_zero'],
                    'warehouse_message_nonzero'=> $lang['warehouse_message_nonzero'],
                    'canonical'                => $lang['canonical'],
                    'xml_name'                 => $lang['xml_name'],
                ] );
            }
        }

        // Import images
        $images = $mdb2->select( 'pp_shop_products_images', '*', [ 'product_id' => $productId ] );
        if ( is_array( $images ) ) {
            foreach ( $images as $image ) {
                $imageUrl = 'https://' . $settings['domain'] . $image['src'];

                $ch = curl_init( $imageUrl );
                curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
                curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
                curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, false );
                curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, false );
                $imageData = curl_exec( $ch );
                curl_close( $ch );

                $imageName = basename( $imageUrl );
                $imageDir = '../upload/product_images/product_' . $newProductId;
                $imagePath = $imageDir . '/' . $imageName;

                if ( !file_exists( $imageDir ) )
                    mkdir( $imageDir, 0777, true );

                file_put_contents( $imagePath, $imageData );

                $this->db->insert( 'pp_shop_products_images', [
                    'product_id' => $newProductId,
                    'src'        => '/upload/product_images/product_' . $newProductId . '/' . $imageName,
                    'o'          => $image['o'],
                ] );
            }
        }

        return [ 'success' => true, 'message' => 'Produkt został zaimportowany.' ];
    }
}