<?php

namespace WPZaraz\Tracking;

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

use WPZaraz\Support\Options;

/**
 * Handles frontend script enqueuing, client-side interaction configuration, and inline events.
 */
class FrontendTracker {

    private EventDispatcher $dispatcher;

    public function __construct(?EventDispatcher $dispatcher = null) {
        $this->dispatcher = $dispatcher ?: new EventDispatcher();
    }

    /**
     * Registers WordPress action hooks.
     */
    public function register(): void {
        add_action('wp_enqueue_scripts', [$this, 'enqueueScripts']);
        add_action('wp_footer', [$this, 'outputQueuedEvents'], 99);
        add_action('comment_post', [$this, 'onCommentPost'], 10, 3);
    }

    /**
     * Retrieves the event dispatcher instance.
     *
     * @return EventDispatcher
     */
    public function getDispatcher(): EventDispatcher {
        return $this->dispatcher;
    }

    /**
     * Checks if tracking should be suppressed for the current user.
     *
     * @return bool
     */
    public static function shouldExcludeCurrentUser(): bool {
        if (!Options::get('exclude_logged_in_users', false)) {
            return false;
        }

        if (!function_exists('is_user_logged_in') || !is_user_logged_in()) {
            return false;
        }

        $excludedRoles = Options::get('excluded_user_roles', ['administrator', 'shop_manager']);
        if (empty($excludedRoles)) {
            return true;
        }

        if (function_exists('wp_get_current_user')) {
            $user = wp_get_current_user();
            if ($user && !empty($user->roles)) {
                foreach ($user->roles as $role) {
                    if (in_array($role, (array) $excludedRoles, true)) {
                        return true;
                    }
                }
            }
        }

        return false;
    }

    /**
     * Enqueues the client bridge script and localizes options.
     */
    public function enqueueScripts(): void {
        if (is_admin() || self::shouldExcludeCurrentUser()) {
            return;
        }

        $url = defined('ZBRIDGE_URL') ? ZBRIDGE_URL : (defined('WP_ZBRIDGE_URL') ? WP_ZBRIDGE_URL : (defined('WP_ZARAZ_URL') ? WP_ZARAZ_URL : ''));
        $ver = defined('ZBRIDGE_VERSION') ? ZBRIDGE_VERSION : (defined('WP_ZBRIDGE_VERSION') ? WP_ZBRIDGE_VERSION : (defined('WP_ZARAZ_VERSION') ? WP_ZARAZ_VERSION : '1.2.7'));
        $path = defined('ZBRIDGE_PATH') ? ZBRIDGE_PATH : (defined('WP_ZBRIDGE_PATH') ? WP_ZBRIDGE_PATH : (defined('WP_ZARAZ_PATH') ? WP_ZARAZ_PATH : dirname(__DIR__, 2) . '/'));

        wp_enqueue_script(
            'wp-zaraz-bridge',
            $url . 'assets/js/zaraz-bridge.js',
            [],
            $ver,
            ['strategy' => 'defer', 'in_footer' => false]
        );

        $clientConfig = $this->getClientConfig();
        wp_localize_script('wp-zaraz-bridge', 'wpZarazConfig', $clientConfig);

        if (class_exists(\WPZaraz\Licensing\FeatureGate::class) && \WPZaraz\Licensing\FeatureGate::hasAccess('pro_tracking')) {
            $proScriptPath = $path . 'assets/js/tracker-pro.js';
            if (file_exists($proScriptPath)) {
                wp_enqueue_script(
                    'wp-zaraz-tracker-pro',
                    $url . 'assets/js/tracker-pro.js',
                    ['wp-zaraz-bridge'],
                    $ver,
                    ['strategy' => 'defer', 'in_footer' => true]
                );
            }
        }
    }

    /**
     * Prepares client-side configuration array.
     *
     * @return array
     */
    public function getClientConfig(): array {
        $extensionsRaw = Options::get('download_extensions', 'pdf,zip,csv,docx,xlsx,mp3,mp4');
        $extensions = array_filter(array_map('trim', explode(',', strtolower($extensionsRaw))));

        $config = [
            'trackScroll'             => (bool) Options::get('track_scroll', true),
            'scrollThresholds'        => Options::get('scroll_thresholds', [25, 50, 75, 90]),
            'trackOutbound'           => (bool) Options::get('track_outbound', true),
            'trackExternalLinks'      => (bool) Options::get('track_external_links', true),
            'trackDownloads'          => (bool) Options::get('track_downloads', true),
            'downloadExtensions'      => array_values($extensions),
            'trackTimeOnPage'         => (bool) Options::get('track_time_on_page', true),
            'timeThresholds'          => (array) Options::get('time_thresholds', [10, 30, 60, 120, 300]),
            'trackEmailClicks'        => (bool) Options::get('track_email_clicks', true),
            'trackPhoneClicks'        => (bool) Options::get('track_phone_clicks', true),
            'trackSearch'             => (bool) Options::get('track_search', true),
            'trackUnsubmittedSearch'   => (bool) Options::get('track_unsubmitted_search', true),
            'trackSearchSelection'     => (bool) Options::get('track_search_selection', true),
            'trackVariantSelection'    => (bool) Options::get('wc_track_variant_selection', true),
            'trackPaymentInfo'         => false,
            'useParentIdForVariations' => (bool) Options::get('wc_use_parent_id_for_variations', false),
            'searchTerm'              => function_exists('is_search') && is_search() ? get_search_query() : '',
            'is404'                   => function_exists('is_404') && is_404(),
        ];

        /**
         * Filter frontend tracker client-side configuration.
         *
         * @param array $config
         */
        return (array) apply_filters('zbridge_frontend_tracker_config', $config);
    }

    /**
     * Outputs any queued events in the footer.
     */
    public function outputQueuedEvents(): void {
        if (self::shouldExcludeCurrentUser()) {
            return;
        }
        // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Pre-formatted inline script generated by EventDispatcher
        echo $this->dispatcher->renderInlineJs();
    }


    /**
     * Handles WordPress comment submission event capture.
     *
     * @param int   $commentId       Comment ID.
     * @param mixed $commentApproved Approval status.
     * @param array $commentdata     Comment data array.
     */
    public function onCommentPost(int $commentId, $commentApproved, array $commentdata = []): void {
        if (!Options::get('track_comments', true)) {
            return;
        }

        $payload = [
            'post_id'    => isset($commentdata['comment_post_ID']) ? (int) $commentdata['comment_post_ID'] : 0,
            'comment_id' => $commentId,
        ];

        $this->setFlashEvent('comment_submit', $payload);
    }

    /**
     * Sets a transient 1-time flash cookie consumed by zaraz-bridge.js on next page load.
     *
     * @param string $eventName Event name.
     * @param array  $payload   Event payload.
     */
    protected function setFlashEvent(string $eventName, array $payload): void {
        if (headers_sent()) {
            return;
        }

        $data = wp_json_encode([
            'type'    => 'track',
            'name'    => $eventName,
            'payload' => $payload,
        ]);

        $cookiePath = defined('COOKIEPATH') && COOKIEPATH ? COOKIEPATH : '/';
        $cookieDomain = defined('COOKIE_DOMAIN') && COOKIE_DOMAIN ? COOKIE_DOMAIN : '';
        $secure = is_ssl();

        setcookie('wp_zbridge_flash_event', rawurlencode((string) $data), time() + 300, $cookiePath, $cookieDomain, $secure, false);
    }
}