<?php
namespace DutchieAnalytics;

class API_Client {
    private $api_url;
    private $api_token;

    public function __construct() {
        $this->api_url = get_option('dutchie_analytics_api_url', 'http://localhost:3010/api');

        // Try to get API key from permissions first, fallback to manual token
        $this->api_token = get_option('dutchie_analytics_api_token', '');

        if (empty($this->api_token) && class_exists('DutchieAnalytics\API_Permissions')) {
            $this->api_token = API_Permissions::get_site_api_key();
        }
    }

    /**
     * Make API request
     */
    private function request($endpoint, $params = []) {
        $url = $this->api_url . $endpoint;

        if (!empty($params)) {
            $url .= '?' . http_build_query($params);
        }

        $args = [
            'headers' => [
                'X-API-Key' => $this->api_token,
                'Content-Type' => 'application/json',
            ],
            'timeout' => 30,
        ];

        $response = wp_remote_get($url, $args);

        if (is_wp_error($response)) {
            error_log('Dutchie Analytics API Error: ' . $response->get_error_message());
            return null;
        }

        $body = wp_remote_retrieve_body($response);
        return json_decode($body, true);
    }

    /**
     * Get all stores
     */
    public function get_stores() {
        return $this->request('/stores');
    }

    /**
     * Get single store
     */
    public function get_store($id) {
        return $this->request('/stores/' . $id);
    }

    /**
     * Get store brands
     */
    public function get_store_brands($store_id) {
        return $this->request('/stores/' . $store_id . '/brands');
    }

    /**
     * Get store specials
     */
    public function get_store_specials($store_id, $date = null) {
        $params = $date ? ['date' => $date] : [];
        return $this->request('/stores/' . $store_id . '/specials', $params);
    }

    /**
     * Get products
     *
     * @param array $args {
     *     @type int    $store_id    Filter by store ID
     *     @type int    $category_id Filter by category ID
     *     @type bool   $in_stock    Filter by stock availability
     *     @type string $search      Search query
     *     @type int    $limit       Results per page (default: 50, max: 1000)
     *     @type int    $offset      Pagination offset
     *     @type string $fields      Comma-separated list of fields to return
     * }
     */
    public function get_products($args = []) {
        $defaults = [
            'limit' => 50,
            'offset' => 0,
        ];

        $params = wp_parse_args($args, $defaults);
        return $this->request('/products', $params);
    }

    /**
     * Get single product
     */
    public function get_product($id) {
        return $this->request('/products/' . $id);
    }

    /**
     * Get categories
     */
    public function get_categories($store_id = null) {
        $params = $store_id ? ['store_id' => $store_id] : [];
        return $this->request('/categories', $params);
    }

    /**
     * Get category tree
     */
    public function get_category_tree($store_id) {
        return $this->request('/categories/tree', ['store_id' => $store_id]);
    }
}