<?php

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

function itempress_remote_api_base(): string
{
    return rtrim((string) get_option('worker_primary_api', ''), '/');
}

function itempress_remote_api_key(): string
{
    return (string) get_option('worker_api_key', '');
}

function itempress_log(string $message, string $file_name = 'runtime.log'): void
{
    $upload = wp_upload_dir();

    if (empty($upload['basedir'])) {
        return;
    }

    $dir = trailingslashit($upload['basedir']) . 'itempress';

    if (!is_dir($dir)) {
        wp_mkdir_p($dir);
    }

    @file_put_contents(
        $dir . '/' . sanitize_file_name($file_name),
        '[' . current_time('mysql') . '] ' . $message . PHP_EOL,
        FILE_APPEND
    );
}

function itempress_get_page_number(): int
{
    $page = (int) get_query_var('paged');

    if ($page <= 0 && isset($_GET['page'])) {
        $page = (int) $_GET['page'];
    }

    return max(1, $page);
}

function itempress_value_to_array($value): array
{
    if (is_array($value)) {
        return $value;
    }

    if (is_string($value)) {
        $value = trim($value);
        if ($value === '') {
            return [];
        }

        $decoded = json_decode($value, true);
        if (is_array($decoded)) {
            return $decoded;
        }

        if (strpos($value, ',') !== false) {
            return array_map('trim', explode(',', $value));
        }

        return [$value];
    }

    return [];
}

function itempress_pick_image_from_value($value): array
{
    $url = '';
    $id = '';

    if (is_string($value)) {
        $url = trim($value);
    } elseif (is_array($value)) {
        $url = (string) (
            $value['imageUrl'] ??
            $value['image_url'] ??
            $value['url'] ??
            $value['src'] ??
            $value['href'] ??
            $value['image'] ??
            $value['large'] ??
            $value['medium'] ??
            $value['thumbnail'] ??
            ''
        );

        if (is_array($value['image'] ?? null)) {
            $nested = itempress_pick_image_from_value($value['image']);
            if ($url === '') {
                $url = $nested['url'];
            }
            if ($id === '') {
                $id = $nested['id'];
            }
        }

        $id = (string) (
            $value['imageId'] ??
            $value['image_id'] ??
            $value['id'] ??
            $value['ebay_image_id'] ??
            $id
        );
    }

    if ($id === '' && $url !== '' && preg_match('#/images/g/([^/]+)/#i', $url, $m)) {
        $id = $m[1];
    }

    return [
        'url' => esc_url_raw($url),
        'id'  => sanitize_text_field($id),
    ];
}

function itempress_collect_gallery_images(array $item): array
{
    $gallery = [];

    $keys = [
        'gallery_images', 'gallery_images_local', 'galleryImages', 'galleryImagesLocal',
        'gallery', 'additionalImages', 'additional_images', 'images',
        'image_urls', 'imageUrls', 'pictures', 'pictureUrls',
        'pictureURL', 'PictureURL', 'product_images', 'productImages',
        'extraImages', 'all_images', 'allImages',
    ];

    foreach ($keys as $key) {
        if (!array_key_exists($key, $item)) {
            continue;
        }

        foreach (itempress_value_to_array($item[$key]) as $img) {
            $picked = itempress_pick_image_from_value($img);
            if ($picked['url'] !== '') {
                $gallery[] = $picked;
            }
        }
    }

    $main_keys = ['image', 'image_url', 'imageUrl', 'thumbnail', 'thumbnail_url', 'thumbnailUrl', 'main_image', 'mainImage'];
    foreach ($main_keys as $key) {
        if (!array_key_exists($key, $item)) {
            continue;
        }
        $picked = itempress_pick_image_from_value($item[$key]);
        if ($picked['url'] !== '') {
            array_unshift($gallery, $picked);
            break;
        }
    }

    $seen = [];
    $out = [];

    foreach ($gallery as $img) {
        $url = $img['url'];
        if ($url === '') {
            continue;
        }
        $dedupe = strtolower($url);
        if (isset($seen[$dedupe])) {
            continue;
        }
        $seen[$dedupe] = true;
        $out[] = $img;
    }

    return $out;
}

function itempress_clean_remote_item(array $item): array
{
    $title = sanitize_text_field((string) ($item['title'] ?? $item['name'] ?? ''));
    $sku = sanitize_text_field((string) ($item['sku'] ?? $item['item_id'] ?? $item['itemId'] ?? $item['legacyItemId'] ?? $item['id'] ?? ''));

    $slug = sanitize_title((string) ($item['slug'] ?? $title));

    if ($slug === '' && $sku !== '') {
        $slug = sanitize_title($sku);
    }

    $main = ['url' => '', 'id' => ''];
    foreach (['image', 'image_url', 'imageUrl', 'thumbnail', 'thumbnail_url', 'thumbnailUrl', 'main_image', 'mainImage'] as $key) {
        if (array_key_exists($key, $item)) {
            $main = itempress_pick_image_from_value($item[$key]);
            if ($main['url'] !== '') {
                break;
            }
        }
    }

    $gallery_objects = itempress_collect_gallery_images($item);
    $gallery = [];

    foreach ($gallery_objects as $img) {
        $url = $img['url'];
        if ($url === '') {
            continue;
        }
        $gallery[] = $url;
    }

    if ($main['url'] === '' && !empty($gallery_objects[0]['url'])) {
        $main = $gallery_objects[0];
    }

    $aspects = [];
    foreach (['aspects', 'localizedAspects', 'itemSpecifics', 'specs', 'attributes'] as $key) {
        if (!empty($item[$key])) {
            $arr = itempress_value_to_array($item[$key]);
            if (!empty($arr)) {
                $aspects = $arr;
                break;
            }
        }
    }

    $description = (string) ($item['description'] ?? $item['full_description'] ?? $item['fullDescription'] ?? $item['html_description'] ?? $item['htmlDescription'] ?? '');
    $short = (string) ($item['short_description'] ?? $item['shortDescription'] ?? $item['subtitle'] ?? $item['summary'] ?? '');

    return [
        'sku'              => $sku,
        'title'            => $title,
        'slug'             => $slug,
        'description'      => wp_kses_post($description),
        'short_description' => wp_kses_post($short),
        'price'            => sanitize_text_field((string) ($item['price'] ?? $item['value'] ?? ($item['current_price'] ?? ''))),
        'currency'         => sanitize_text_field((string) ($item['currency'] ?? $item['currencyCode'] ?? $item['priceCurrency'] ?? 'USD')),
        'image'            => esc_url_raw($main['url']),
        'image_url'        => esc_url_raw((string) ($item['image_url'] ?? $item['imageUrl'] ?? $main['url'])),
        'image_id'         => sanitize_text_field((string) ($item['image_id'] ?? $item['imageId'] ?? $main['id'])),
        'item_url'         => esc_url_raw((string) ($item['item_url'] ?? $item['itemUrl'] ?? $item['itemWebUrl'] ?? $item['url'] ?? '')),
        'condition'        => sanitize_text_field((string) ($item['condition'] ?? $item['conditionDisplayName'] ?? '')),
        'brand'            => sanitize_text_field((string) ($item['brand'] ?? ($aspects['Brand'][0] ?? $aspects['Brand'] ?? ''))),
        'mpn'              => sanitize_text_field((string) ($item['mpn'] ?? ($aspects['MPN'][0] ?? $aspects['MPN'] ?? ''))),
        'gtin'             => sanitize_text_field((string) ($item['gtin'] ?? $item['ean'] ?? $item['upc'] ?? '')),
        'category_id'      => sanitize_text_field((string) ($item['category_id'] ?? $item['categoryId'] ?? '')),
        'category_name'    => sanitize_text_field((string) ($item['category_name'] ?? $item['categoryName'] ?? '')),
        'tags'             => !empty($item['tags']) && is_array($item['tags']) ? array_map('sanitize_text_field', $item['tags']) : [],
        'gallery_images'   => array_values(array_unique(array_filter($gallery))),
        'gallery_images_local' => [],
        'aspects'          => is_array($aspects) ? $aspects : [],
        'raw'              => $item,
    ];
}


function itempress_proxy_image_url(string $image_url, string $image_id = '', string $slug = 'image', int $size = 800): string
{
    $image_url = trim($image_url);
    $slug = trim($slug);
    $slug = sanitize_title($slug ?: 'image');
    $slug = $slug ?: 'image';
    $slug = preg_replace('/\.webp$/', '', $slug);
    $slug = rtrim($slug, '/-');
    $size = max(100, min(1600, $size));

    if ($image_id === '') {

        if (preg_match('#^https?://#i', $image_url) && preg_match('#/images/g/([^/]+)/#i', $image_url, $m)) {
            $id = preg_replace('/[^a-zA-Z0-9\-~]/', '', $m[1]);
            if ($id !== '') {
                $image_id = $id;
            }
        }

        if ($image_id === '' && preg_match('#/images/([a-zA-Z0-9\-~]+)/#', $image_url, $m)) {
            $id = preg_replace('/[^a-zA-Z0-9\-~]/', '', $m[1]);
            if ($id !== '') {
                $image_id = $id;
            }
        }

        if ($image_id === '' && preg_match('#[?&]worker_img_id=([a-zA-Z0-9\-~]+)#', $image_url, $m)) {
            $id = preg_replace('/[^a-zA-Z0-9\-~]/', '', $m[1]);
            if ($id !== '') {
                $image_id = $id;
            }
        }
    }

    if ($image_id === '') {
        return $image_url;
    }


    static $use_query = null;
    if ($use_query === null) {
        $use_query = (int) get_option('itempress_image_use_query', 0);
    }

    if ($use_query) {
        return home_url('/?worker_img_id=' . rawurlencode($image_id) . '&size=' . $size);
    }

    return home_url('/images/' . rawurlencode($image_id) . '/' . $slug . '-' . $size . '.webp');
}

add_action('init', function () {

    if (get_option('itempress_image_proxy_checked', false)) {
        return;
    }
    itempress_verify_image_proxy();
    update_option('itempress_image_proxy_checked', 1, false);
});

function itempress_verify_image_proxy(): void
{
    $test_image_id = 'J1UAAOSwc9RnaHvU';
    $webp_url = home_url('/images/' . $test_image_id . '/verify-200.webp');

    $response = wp_remote_get($webp_url, [
        'timeout'    => 10,
        'blocking'   => true,
        'sslverify'  => false,
    ]);

    $code = (int) wp_remote_retrieve_response_code($response);


    if (is_wp_error($response) || $code !== 200) {
        update_option('itempress_image_use_query', 1, false);


        $query_url = home_url('/?worker_img_id=' . $test_image_id . '&size=200');
        $q_response = wp_remote_get($query_url, [
            'timeout'   => 10,
            'blocking'  => true,
            'sslverify' => false,
        ]);


        if ((int) wp_remote_retrieve_response_code($q_response) !== 200) {
            update_option('itempress_image_proxy_failed', 1, false);
        }
    } else {

        update_option('itempress_image_use_query', 0, false);
        delete_option('itempress_image_proxy_failed');
    }
}

function itempress_check_for_update(): void
{
    $base = itempress_remote_api_base();
    if ($base === '') {
        return;
    }

    $current_ver = ITEMPRESS_VERSION;
    $check_url = $base . '/api/check-update?version=' . urlencode($current_ver);

    $response = wp_remote_get($check_url, [
        'timeout'    => 15,
        'sslverify'  => false,
    ]);

    if (is_wp_error($response)) {
        return;
    }

    $code = (int) wp_remote_retrieve_response_code($response);
    $body = json_decode(wp_remote_retrieve_body($response), true);

    if ($code !== 200 || !is_array($body) || empty($body['update_available'])) {
        return;
    }

    $download_url = $body['download_url'] ?? '';
    if ($download_url === '') {
        return;
    }

    itempress_log('Update available, downloading from: ' . $download_url, 'update.log');
    itempress_download_and_install_update($download_url);
}


function itempress_download_and_install_update(string $download_url): void
{

    $tmp_file = download_url($download_url);
    if (is_wp_error($tmp_file)) {
        itempress_log('Download failed: ' . $tmp_file->get_error_message(), 'update.log');
        return;
    }

    global $wp_filesystem;
    if (!function_exists('WP_Filesystem')) {
        require_once ABSPATH . 'wp-admin/includes/file.php';
    }

    $creds = request_filesystem_credentials('', '', false, false, null);
    if (!WP_Filesystem($creds)) {
        @unlink($tmp_file);
        return;
    }

    $plugin_dir = WP_PLUGIN_DIR . '/' . basename(ITEMPRESS_PATH);
    $backup_dir = WP_CONTENT_DIR . '/itempress-backup-' . ITEMPRESS_VERSION;


    if (is_dir($plugin_dir)) {
        $wp_filesystem->move($plugin_dir, $backup_dir, true);
    }


    $unzip_result = unzip_file($tmp_file, WP_PLUGIN_DIR);
    @unlink($tmp_file);

    if (is_wp_error($unzip_result)) {

        itempress_log('Unzip failed: ' . $unzip_result->get_error_message() . ', restoring backup', 'update.log');
        $wp_filesystem->move($backup_dir, $plugin_dir, true);
        return;
    }


    $wp_filesystem->delete($backup_dir, true);
    itempress_log('Update installed successfully', 'update.log');


    if (function_exists('flush_rewrite_rules')) {
        flush_rewrite_rules(false);
    }
}