<?php

if (!defined('_PS_VERSION_')) {
    exit;
}

class EcomZone extends Module
{
    private $errors = [];
    private $api;
    
    public function __construct()
    {
        $this->name = 'ecomzone';
        $this->tab = 'market_place';
        $this->version = '1.0.0';
        $this->author = 'Your Name';
        $this->need_instance = 0;
        $this->bootstrap = true;
        $this->ps_versions_compliancy = [
            'min' => '1.7.0.0',
            'max' => _PS_VERSION_
        ];

        parent::__construct();

        $this->displayName = $this->l('EcomZone Integration');
        $this->description = $this->l('Integrates PrestaShop with EcomZone Dropshipping API');
        
        // Initialize API
        require_once(dirname(__FILE__) . '/classes/EcomZoneAPI.php');
        $this->api = new EcomZoneAPI();
    }

    public function install()
    {
        if (!parent::install()) {
            $this->errors[] = $this->l('Could not install the module');
            return false;
        }

        if (!$this->registerHook('actionProductUpdate') || 
            !$this->registerHook('actionCronJob')) {
            $this->errors[] = $this->l('Could not register hooks');
            return false;
        }

        // Set default API configuration
        if (!Configuration::updateValue('ECOMZONE_API_KEY', 'klRyAdrXaxL0s6PEUp7LDlH6T8aPSCtBY8NiEHsHiWpc6646K2TZPi5KMxUg') ||
            !Configuration::updateValue('ECOMZONE_API_URL', 'https://dropship.ecomzone.eu/api') ||
            !Configuration::updateValue('ECOMZONE_LAST_CRON', time())) {
            $this->errors[] = $this->l('Could not set default configuration');
            return false;
        }

        return true;
    }

    public function getContent()
    {
        $output = '';
        $debugOutput = '';
        
        if (Tools::isSubmit('submitEcomZone')) {
            $apiKey = Tools::getValue('ECOMZONE_API_KEY');
            
            if (!$apiKey) {
                $output .= $this->displayError($this->l('API Key is required'));
            } else {
                Configuration::updateValue('ECOMZONE_API_KEY', $apiKey);
                $output .= $this->displayConfirmation($this->l('Settings updated'));
            }
        }
        
        // Handle manual fetch
        if (Tools::isSubmit('fetchProducts')) {
            try {
                $debugOutput .= "Starting manual product fetch...\n";
                $result = $this->cronRefreshProducts();
                
                if ($result['success']) {
                    $catalog = $this->api->getCatalog(1000);
                    if (isset($catalog['data']) && is_array($catalog['data'])) {
                        $totalProducts = count($catalog['data']);
                        $debugOutput .= sprintf("Found %d products\n\nPreview of first 5 products:\n", $totalProducts);
                        
                        // Show first 5 products as preview
                        for ($i = 0; $i < min(5, $totalProducts); $i++) {
                            $product = $catalog['data'][$i];
                            $debugOutput .= sprintf(
                                "Product %d/%d: %s - %s (Price: %s EUR, Stock: %s)\n",
                                $i + 1,
                                $totalProducts,
                                $product['sku'],
                                $product['product_name'],
                                $product['product_price'],
                                $product['stock']
                            );
                        }
                        
                        if ($totalProducts > 5) {
                            $debugOutput .= "\n... and " . ($totalProducts - 5) . " more products\n";
                        }
                        
                        $debugOutput .= sprintf("\nTotal products updated: %d\n", $result['updated']);
                    }
                    $output .= $this->displayConfirmation($this->l('Products fetched successfully'));
                }
            } catch (Exception $e) {
                $debugOutput .= "Error: " . $e->getMessage() . "\n";
                $output .= $this->displayError($this->l('Error fetching products'));
            }
        }
        
        // Store debug output in smarty variable
        $this->context->smarty->assign('debug_output', $debugOutput);
        
        return $output . $this->displayForm();
    }

    public function displayForm()
    {
        $fields_form[0]['form'] = [
            'legend' => [
                'title' => $this->l('Settings'),
            ],
            'input' => [
                [
                    'type' => 'text',
                    'label' => $this->l('API Key'),
                    'name' => 'ECOMZONE_API_KEY',
                    'required' => true,
                    'size' => 50
                ],
            ],
            'buttons' => [
                [
                    'type' => 'submit',
                    'title' => $this->l('Fetch Products'),
                    'icon' => 'process-icon-download',
                    'name' => 'fetchProducts',
                    'class' => 'btn btn-primary pull-left'
                ]
            ],
            'submit' => [
                'title' => $this->l('Save'),
                'class' => 'btn btn-default pull-right'
            ]
        ];

        $helper = new HelperForm();
        $helper->module = $this;
        $helper->name_controller = $this->name;
        $helper->token = Tools::getAdminTokenLite('AdminModules');
        $helper->currentIndex = AdminController::$currentIndex . '&configure=' . $this->name;
        $helper->default_form_language = Configuration::get('PS_LANG_DEFAULT');
        $helper->fields_value['ECOMZONE_API_KEY'] = Configuration::get('ECOMZONE_API_KEY');
        
        // Add debug console after form
        $form = $helper->generateForm($fields_form);
        $debug_console = '<div class="panel">
            <div class="panel-heading">
                <i class="icon-list"></i> ' . $this->l('Debug Console') . '
            </div>
            <div class="panel-content">
                <pre id="debug-console" style="max-height: 300px; overflow-y: auto; background: #f5f5f5; padding: 10px;">
                    ' . $this->context->smarty->getTemplateVars('debug_output') . '
                </pre>
            </div>
        </div>';
        
        return $form . $debug_console;
    }

    public function getErrors()
    {
        return $this->errors;
    }

    public function hookActionProductUpdate($params)
    {
        try {
            $product = $params['product'];
            $productId = $product->id;
            
            // Get product reference (SKU)
            $reference = $product->reference;
            
            if (!empty($reference)) {
                // Get product data from EcomZone
                $ecomZoneProduct = $this->api->getProduct($reference);
                
                if ($ecomZoneProduct && isset($ecomZoneProduct['data'])) {
                    // Update stock
                    if (isset($ecomZoneProduct['data']['stock'])) {
                        StockAvailable::setQuantity($productId, 0, (int)$ecomZoneProduct['data']['stock']);
                    }
                    
                    // Update price
                    if (isset($ecomZoneProduct['data']['product_price'])) {
                        $product->price = (float)$ecomZoneProduct['data']['product_price'];
                        $product->update();
                    }
                    
                    PrestaShopLogger::addLog(
                        sprintf('EcomZone: Updated product %s (ID: %d)', $reference, $productId),
                        1, // Notice level
                        null,
                        'Product',
                        $productId,
                        true
                    );
                }
            }
        } catch (Exception $e) {
            PrestaShopLogger::addLog(
                sprintf('EcomZone: Error updating product %d: %s', $productId, $e->getMessage()),
                3, // Error level
                null,
                'Product',
                $productId,
                true
            );
        }
    }

    public function cronRefreshProducts()
    {
        try {
            PrestaShopLogger::addLog(
                'EcomZone: Starting scheduled product refresh',
                1,
                null,
                'EcomZone'
            );

            $catalog = $this->api->getCatalog(1000);
            
            if (!isset($catalog['data']) || !is_array($catalog['data'])) {
                throw new Exception('Invalid catalog data received from API');
            }

            $totalProducts = count($catalog['data']);
            $updatedCount = 0;
            $createdCount = 0;
            $defaultLangId = (int)Configuration::get('PS_LANG_DEFAULT');
            $defaultShopId = (int)Configuration::get('PS_SHOP_DEFAULT');

            foreach ($catalog['data'] as $ecomZoneProduct) {
                $reference = $ecomZoneProduct['sku'];
                $productId = Product::getIdByReference($reference);
                
                try {
                    if (!$productId) {
                        // Create new product
                        $product = new Product();
                        $product->reference = $reference;
                        $product->name = [$defaultLangId => $ecomZoneProduct['product_name']];
                        $product->description = [$defaultLangId => $ecomZoneProduct['long_description'] ?? ''];
                        $product->description_short = [$defaultLangId => $ecomZoneProduct['description'] ?? ''];
                        $product->price = (float)$ecomZoneProduct['product_price'];
                        $product->active = true;  // Make sure product is active
                        $product->visibility = 'both'; // Show in catalog and search
                        $product->available_for_order = true;
                        $product->show_price = true;
                        $product->id_shop_default = $defaultShopId;
                        $product->id_category_default = 2; // Home category
                        
                        // Add to all shops if multistore
                        $product->id_shop_list = Shop::getShops(true, null, true);
                        
                        if ($product->add()) {
                            $productId = $product->id;
                            
                            // Associate with Home category
                            $product->addToCategories([2]);
                            
                            // Set stock
                            StockAvailable::setQuantity($productId, 0, (int)$ecomZoneProduct['stock']);
                            
                            // Set stock settings
                            StockAvailable::setProductOutOfStock($productId, 1); // Allow orders when out of stock
                            
                            // Update shop association
                            $product->updateCategories($product->id_shop_list);
                            
                            // Add minimum quantity of 1
                            $product->minimal_quantity = 1;
                            $product->update();
                            
                            $createdCount++;
                            
                            // Download and set product image if available
                            if (!empty($ecomZoneProduct['image'])) {
                                $this->importProductImage($product, $ecomZoneProduct['image']);
                            }
                        }
                    } else {
                        // Update existing product
                        $product = new Product($productId);
                        $product->name[$defaultLangId] = $ecomZoneProduct['product_name'];
                        $product->description[$defaultLangId] = $ecomZoneProduct['long_description'] ?? '';
                        $product->description_short[$defaultLangId] = $ecomZoneProduct['description'] ?? '';
                        $product->price = (float)$ecomZoneProduct['product_price'];
                        $product->active = true;  // Make sure product is active
                        $product->visibility = 'both';
                        $product->available_for_order = true;
                        $product->show_price = true;
                        $product->update();
                        
                        StockAvailable::setQuantity($productId, 0, (int)$ecomZoneProduct['stock']);
                        $updatedCount++;
                    }

                    // Clear cache for this product
                    $this->clearProductCache($productId);

                } catch (Exception $e) {
                    PrestaShopLogger::addLog(
                        sprintf('EcomZone: Error processing product %s: %s', $reference, $e->getMessage()),
                        3,
                        null,
                        'Product'
                    );
                    continue;
                }
            }

            // Clear cache after all products are processed
            $this->clearCache();

            PrestaShopLogger::addLog(
                sprintf('EcomZone: Created %d new products, Updated %d existing products', 
                    $createdCount, 
                    $updatedCount
                ),
                1,
                null,
                'EcomZone'
            );

            return [
                'success' => true,
                'message' => sprintf('Created %d new products, Updated %d existing products', $createdCount, $updatedCount),
                'total' => $totalProducts,
                'created' => $createdCount,
                'updated' => $updatedCount
            ];

        } catch (Exception $e) {
            PrestaShopLogger::addLog(
                'EcomZone Error: ' . $e->getMessage(),
                3,
                null,
                'EcomZone'
            );
            throw $e;
        }
    }

    private function importProductImage($product, $imageUrl)
    {
        try {
            $tempFile = tempnam(_PS_TMP_IMG_DIR_, 'import');
            if (@file_put_contents($tempFile, @file_get_contents($imageUrl))) {
                $product->deleteImages(); // Remove existing images
                $image = new Image();
                $image->id_product = $product->id;
                $image->position = 1;
                $image->cover = true;
                
                if ($image->add()) {
                    return (bool)@rename($tempFile, _PS_PROD_IMG_DIR_ . $image->getImgPath() . '.jpg');
                }
            }
            return false;
        } catch (Exception $e) {
            PrestaShopLogger::addLog(
                sprintf('EcomZone: Error importing image for product %d: %s', $product->id, $e->getMessage()),
                3,
                null,
                'Product'
            );
            return false;
        }
    }

    public function hookActionCronJob()
    {
        $lastRun = (int)Configuration::get('ECOMZONE_LAST_CRON');
        $currentTime = time();
        
        // Check if 2 hours have passed (7200 seconds)
        if (($currentTime - $lastRun) >= 7200) {
            $this->cronRefreshProducts();
            Configuration::updateValue('ECOMZONE_LAST_CRON', $currentTime);
        }
    }

    public function uninstall()
    {
        return parent::uninstall() &&
            Configuration::deleteByName('ECOMZONE_API_KEY') &&
            Configuration::deleteByName('ECOMZONE_API_URL') &&
            Configuration::deleteByName('ECOMZONE_LAST_CRON');
    }

    private function clearProductCache($productId)
    {
        try {
            Tools::clearSmartyCache();
            Tools::clearXMLCache();
            Media::clearCache();
            
            $sql = 'DELETE FROM ' . _DB_PREFIX_ . 'smarty_cache 
                    WHERE template LIKE "%product%"';
            Db::getInstance()->execute($sql);
            
        } catch (Exception $e) {
            PrestaShopLogger::addLog(
                sprintf('EcomZone: Error clearing cache for product %d: %s', $productId, $e->getMessage()),
                3,
                null,
                'Product'
            );
        }
    }

    private function clearCache()
    {
        try {
            Tools::clearSmartyCache();
            Tools::clearXMLCache();
            Media::clearCache();
            Tools::generateIndex();
        } catch (Exception $e) {
            PrestaShopLogger::addLog(
                'EcomZone: Error clearing cache: ' . $e->getMessage(),
                3,
                null,
                'EcomZone'
            );
        }
    }
}