<?php
/**
 * Products Action - Get products with enriched data
 *
 * Optimized to fetch only required fields for telesales app
 * Includes BOGO rules from Woo Discount Rules plugin
 */

require_once __DIR__ . '/../services/UpsellService.php';
require_once __DIR__ . '/../services/DiscountRulesService.php';

/**
 * Handle get_products action
 *
 * @return void
 */
function handleGetProducts(): void
{
    $logFile = __DIR__ . '/../../logs/products_debug.log';
    $logDir = dirname($logFile);
    if (!is_dir($logDir)) {
        mkdir($logDir, 0755, true);
    }
    
    $log = function($msg, $data = null) use ($logFile) {
        $timestamp = date('Y-m-d H:i:s');
        $logMessage = "[{$timestamp}] {$msg}";
        if ($data !== null) {
            $logMessage .= "\n" . print_r($data, true);
        }
        $logMessage .= "\n" . str_repeat('-', 80) . "\n";
        file_put_contents($logFile, $logMessage, FILE_APPEND);
    };
    
    try {
        $log("handleGetProducts() started");
        
        $woocommerce = getWooCommerce();
        $log("WooCommerce client initialized");
        
        // Only fetch fields needed for telesales app
        // Include meta_data for ACF fields like upsell_informatie
        $productFields = 'id,name,price,type,upsell_ids,cross_sell_ids,callcenter_upsell_info';
        $variationFields = 'id,price,attributes';
        
        $products = $woocommerce->get('products', [
            'status' => 'publish',
            'per_page' => 100,
            '_fields' => $productFields
        ]);
        $log("Fetched products from WooCommerce", ['count' => count($products)]);
        
        // Build service maps
        $cuw_map = UpsellService::buildProductMap();
        $log("Built CUW map");
        
        // Get BOGO rules from Woo Discount Rules
        $log("Creating DiscountRulesService...");
        $discountService = new DiscountRulesService();
        $log("DiscountRulesService created");
        
        $productIds = array_map(fn($p) => (int) $p->id, $products);
        $log("Product IDs extracted", ['count' => count($productIds)]);
        
        $log("Calling buildProductBogoMap...");
        $bogo_map = $discountService->buildProductBogoMap($productIds);
        $log("BOGO map built", ['products_with_bogo' => count($bogo_map)]);

        $enriched = [];

        foreach ($products as $product) {
            $productId = (int) $product->id;
            
            $log("Product Info from WooCommerce", $product);
            
            // Get variations for variable products (only needed fields)
            $variation_details = [];
            if ($product->type === 'variable') {
                $variation_details = (array) $woocommerce->get(
                    "products/{$product->id}/variations",
                    [
                        'per_page' => 50,
                        '_fields' => $variationFields
                    ]
                );
            }

            // Combine upsell + cross-sell + CUW IDs
            $upsell_ids = !empty($product->upsell_ids)
                ? array_map('intval', (array) $product->upsell_ids)
                : [];
            $cross_sell_ids = !empty($product->cross_sell_ids)
                ? array_map('intval', (array) $product->cross_sell_ids)
                : [];

            $cuw_ids = $cuw_map[$productId] ?? [];

            $recommended_ids = array_values(array_unique(array_filter(array_merge(
                $upsell_ids,
                $cross_sell_ids,
                $cuw_ids
            ))));
            
            // Get BOGO rules for this product
            $bogo_rules = $bogo_map[$productId] ?? [];

            // Build minimal product object with only needed fields
            $enriched[] = [
                'id' => $productId,
                'name' => $product->name,
                'price' => $product->price,
                'type' => $product->type,
                'upsell_ids' => $upsell_ids,
                'cross_sell_ids' => $cross_sell_ids,
                'variation_details' => $variation_details,
                'cuw_ids' => $cuw_ids,
                'recommended_ids' => $recommended_ids,
                'bogo_rules' => $bogo_rules,
                'upsell_text' => $product->callcenter_upsell_info
            ];
        }

        $log("Returning " . count($enriched) . " enriched products");
        echo json_encode($enriched);
    } catch (Exception $e) {
        $log("ERROR in handleGetProducts", [
            'message' => $e->getMessage(),
            'file' => $e->getFile(),
            'line' => $e->getLine(),
            'trace' => $e->getTraceAsString()
        ]);
        echo json_encode(['error' => $e->getMessage()]);
    } catch (Error $e) {
        $log("FATAL ERROR in handleGetProducts", [
            'message' => $e->getMessage(),
            'file' => $e->getFile(),
            'line' => $e->getLine(),
            'trace' => $e->getTraceAsString()
        ]);
        echo json_encode(['error' => $e->getMessage()]);
    }
}