<?php
if ( ! defined( 'ABSPATH' ) ) { exit; }

/**
 * Miravia Feed Jobs Manager
 * Handles Feed API job creation, monitoring, and status updates
 */
class MiraviaFeedManager {
    
    private $sdk;
    
    public function __construct() {
        require_once __DIR__ . '/shared/MiraviaSdk.php';
        $this->sdk = new MiraviaSdk();
    }
    
    /**
     * Submit single product to Feed API
     */
    public function submitSingleProduct($productId) {
        return $this->submitProducts([$productId]);
    }
    
    /**
     * Submit multiple products to Feed API
     */
    public function submitProducts($productIds) {
        global $wpdb;
        
        if(empty($productIds)) {
            return ['success' => false, 'error' => 'No products provided'];
        }
        
        // Validate all products exist
        $validProducts = [];
        foreach($productIds as $productId) {
            $product = wc_get_product($productId);
            if($product) {
                $validProducts[] = $productId;
            }
        }
        
        if(empty($validProducts)) {
            return ['success' => false, 'error' => 'No valid products found'];
        }
        
        // Create feed job record
        $jobId = $wpdb->insert(
            $wpdb->prefix . 'miravia_feed_jobs',
            [
                'feed_type' => 'PRODUCT_LISTING',
                'status' => 'CREATING_DOCUMENT',
                'product_count' => count($validProducts),
                'product_ids' => json_encode($validProducts)
            ],
            ['%s', '%s', '%d', '%s']
        );
        
        if(!$jobId) {
            return ['success' => false, 'error' => 'Failed to create job record'];
        }
        
        $jobId = $wpdb->insert_id;
        
        LOG::add("Feed Manager: Starting job {$jobId} for " . count($validProducts) . " products");
        
        try {
            // Build products data for feed
            $feedData = $this->buildFeedData($validProducts);
            
            // Submit to Feed API
            $result = $this->sdk->submitFeed($feedData);
            
            if($result && $result['success']) {
                // Update job with feed ID
                $wpdb->update(
                    $wpdb->prefix . 'miravia_feed_jobs',
                    [
                        'feed_id' => $result['feed_id'],
                        'feed_document_id' => $result['feed_document_id'],
                        'status' => 'SUBMITTED',
                        'processing_start_time' => current_time('mysql')
                    ],
                    ['id' => $jobId],
                    ['%s', '%s', '%s', '%s'],
                    ['%d']
                );
                
                LOG::add("Feed Manager: Job {$jobId} submitted successfully - Feed ID: {$result['feed_id']}");
                
                return [
                    'success' => true,
                    'job_id' => $jobId,
                    'feed_id' => $result['feed_id'],
                    'message' => "Feed submitted successfully for " . count($validProducts) . " products"
                ];
            } else {
                // Update job with error
                $wpdb->update(
                    $wpdb->prefix . 'miravia_feed_jobs',
                    [
                        'status' => 'FAILED',
                        'error_message' => $this->sdk->last_error
                    ],
                    ['id' => $jobId],
                    ['%s', '%s'],
                    ['%d']
                );
                
                return ['success' => false, 'error' => $this->sdk->last_error];
            }
            
        } catch (Exception $e) {
            // Update job with error
            $wpdb->update(
                $wpdb->prefix . 'miravia_feed_jobs',
                [
                    'status' => 'FAILED',
                    'error_message' => $e->getMessage()
                ],
                ['id' => $jobId],
                ['%s', '%s'],
                ['%d']
            );
            
            LOG::add("Feed Manager: Job {$jobId} failed - " . $e->getMessage());
            return ['success' => false, 'error' => $e->getMessage()];
        }
    }
    
    /**
     * Build feed data from WooCommerce products
     */
    private function buildFeedData($productIds) {
        $feedProducts = [];
        
        foreach($productIds as $productId) {
            $product = wc_get_product($productId);
            if(!$product) continue;
            
            // Get product images
            $images = [];
            $imageId = $product->get_image_id();
            if($imageId) {
                $images[] = wp_get_attachment_image_url($imageId, 'full');
            }
            
            $galleryIds = $product->get_gallery_image_ids();
            foreach($galleryIds as $galleryId) {
                $images[] = wp_get_attachment_image_url($galleryId, 'full');
            }
            
            // Build product data for feed
            $productKey = "Product_" . $productId;
            $feedProducts[$productKey] = [
                'PrimaryCategory' => get_option('miravia_default_category', 201336100),
                'Images' => ['Image' => $images],
                'Attributes' => [
                    'name' => $product->get_name(),
                    'description' => $product->get_description() ?: $product->get_short_description(),
                    'short_description' => $product->get_short_description(),
                    'brand' => get_option('miravia_default_brand', 'No Brand'),
                    'delivery_option_sof' => 'No',
                    'Hazmat' => 'None'
                ],
                'Skus' => [
                    'Sku' => [[
                        'SellerSku' => $product->get_sku() ?: "wp_" . $productId,
                        'quantity' => $product->get_stock_quantity() ?: get_option('_miravia_default_stock', 100),
                        'price' => $product->get_regular_price(),
                        'special_price' => $product->get_sale_price(),
                        'package_height' => '1',
                        'package_length' => '1',
                        'package_width' => '1',
                        'package_weight' => $product->get_weight() ?: '0.1',
                        'package_content' => $product->get_name(),
                        'ean_code' => get_post_meta($productId, get_option('miravia_ean_key', '_ean'), true),
                        'Images' => ['Image' => array_slice($images, 0, 1)] // First image for SKU
                    ]]
                ]
            ];
        }
        
        return $feedProducts;
    }
    
    /**
     * Update job status by checking Feed API
     */
    public function updateJobStatus($jobId) {
        global $wpdb;
        
        $job = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}miravia_feed_jobs WHERE id = %d",
            $jobId
        ));
        
        if(!$job || !$job->feed_id) {
            return false;
        }
        
        // Get feed status from API
        $status = $this->sdk->getFeedStatus($job->feed_id);
        
        if($status) {
            $updateData = ['updated' => current_time('mysql')];
            
            switch($status->processing_status) {
                case 'DONE':
                    $updateData['status'] = 'COMPLETED';
                    $updateData['processing_end_time'] = current_time('mysql');
                    
                    // Get detailed results if available
                    if(isset($status->result_feed_document_id)) {
                        $results = $this->sdk->getFeedResults($status->result_feed_document_id);
                        if($results) {
                            $updateData['result_data'] = json_encode($results);
                        }
                    }
                    break;
                    
                case 'IN_PROGRESS':
                    $updateData['status'] = 'PROCESSING';
                    break;
                    
                case 'FAILED':
                case 'CANCELLED':
                case 'FATAL':
                    $updateData['status'] = 'FAILED';
                    $updateData['processing_end_time'] = current_time('mysql');
                    if(isset($status->error_message)) {
                        $updateData['error_message'] = $status->error_message;
                    }
                    break;
            }
            
            $wpdb->update(
                $wpdb->prefix . 'miravia_feed_jobs',
                $updateData,
                ['id' => $jobId],
                array_fill(0, count($updateData), '%s'),
                ['%d']
            );
            
            LOG::add("Feed Manager: Job {$jobId} status updated to {$updateData['status']}");
            return true;
        }
        
        return false;
    }
    
    /**
     * Get all jobs with pagination
     */
    public function getJobs($limit = 20, $offset = 0, $status = null) {
        global $wpdb;
        
        $where = '';
        $params = [];
        
        if($status) {
            $where = ' WHERE status = %s';
            $params[] = $status;
        }
        
        $params[] = $limit;
        $params[] = $offset;
        
        return $wpdb->get_results($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}miravia_feed_jobs{$where} ORDER BY created DESC LIMIT %d OFFSET %d",
            ...$params
        ));
    }
    
    /**
     * Get job count
     */
    public function getJobCount($status = null) {
        global $wpdb;
        
        $where = '';
        $params = [];
        
        if($status) {
            $where = ' WHERE status = %s';
            $params[] = $status;
        }
        
        return $wpdb->get_var($wpdb->prepare(
            "SELECT COUNT(*) FROM {$wpdb->prefix}miravia_feed_jobs{$where}",
            ...$params
        ));
    }
    
    /**
     * Resubmit failed job
     */
    public function resubmitJob($jobId) {
        global $wpdb;
        
        $job = $wpdb->get_row($wpdb->prepare(
            "SELECT * FROM {$wpdb->prefix}miravia_feed_jobs WHERE id = %d",
            $jobId
        ));
        
        if(!$job) {
            return ['success' => false, 'error' => 'Job not found'];
        }
        
        $productIds = json_decode($job->product_ids, true);
        if(!$productIds) {
            return ['success' => false, 'error' => 'No products found in job'];
        }
        
        // Reset job status
        $wpdb->update(
            $wpdb->prefix . 'miravia_feed_jobs',
            [
                'status' => 'RESUBMITTING',
                'feed_id' => null,
                'feed_document_id' => null,
                'error_message' => null,
                'processing_start_time' => null,
                'processing_end_time' => null
            ],
            ['id' => $jobId],
            ['%s', '%s', '%s', '%s', '%s', '%s'],
            ['%d']
        );
        
        // Resubmit
        return $this->submitProducts($productIds);
    }
}