<?php

class WP_Plugin_SumoMe
{
    /**
     * @var string
     */
    public $dataSumoPlatform;

    public function __construct(){
        add_action('wp_ajax_sumome_main', [$this, 'ajax_sumome_main']);
        add_action('wp_ajax_sumome_dashboard_welcome', [$this, 'ajax_sumome_dashboard_welcome']);
        add_action('wp_ajax_sumome_hide_dashboard_overlay', [$this, 'ajax_sumome_hide_dashboard_overlay']);
        add_action('wp_footer', [$this, 'append_script_code']);
        add_action('admin_footer', [$this, 'append_admin_script_code']);
        add_action('admin_menu', [$this, 'admin_menu']);
        add_action('admin_init', [$this, 'admin_init']);
        add_action('admin_enqueue_scripts', [$this, 'admin_enqueue_scripts']);
        add_action('wp_dashboard_setup', [$this, 'dashboard_setup']);

        //add to front end footer
        add_action('wp_footer', [$this, 'woocommerce_cart_scripts']);
        //add to backend footer
        add_action('admin_footer', [$this, 'woocommerce_cart_scripts']);

        // WooCommerce helpers
        add_action('wp_ajax_nopriv_sumo_get_woocommerce_cart_subtotal', [
            $this,
            'ajax_sumo_get_woocommerce_cart_subtotal'
        ]);
        add_action('wp_ajax_nopriv_sumo_add_woocommerce_coupon', [$this, 'ajax_sumo_add_woocommerce_coupon']);
        add_action('wp_ajax_nopriv_sumo_remove_woocommerce_coupon', [$this, 'ajax_sumo_remove_woocommerce_coupon']);

        add_action('wp_ajax_sumo_get_woocommerce_cart_subtotal', [$this, 'ajax_sumo_get_woocommerce_cart_subtotal']);
        add_action('wp_ajax_sumo_add_woocommerce_coupon', [$this, 'ajax_sumo_add_woocommerce_coupon']);
        add_action('wp_ajax_sumo_remove_woocommerce_coupon', [$this, 'ajax_sumo_remove_woocommerce_coupon']);

        $this->dataSumoPlatform = 'wordpress';
        if(get_option('endurance_user') === 1){
            $this->dataSumoPlatform = 'wordpress-endurance';
        }
    }

    public static function activate_SumoMe_plugin(){
        self::upgrade_manual_sumome_installation();
        self::ajax_sumome_show_dashboard_overlay();
    }

    public static function deactivate_SumoMe_plugin(){
        self::ajax_sumome_show_dashboard_overlay();
    }

    public function admin_init(){
        register_setting('sumome', 'sumome_site_id', [$this, 'sanitize_site_id']);

        $this->check_generate_site_id();

        add_settings_section('sumome-settings', 'Settings', null, 'sumome');
        add_settings_field('sumome-site_id', '', [
            &$this,
            'settings_field_site_id'
        ], 'sumome', 'sumome-settings', ['field' => 'sumome_site_id', 'label_for' => 'sumome_site_id']);
    }

    public function admin_menu(){
        add_menu_page('Sumo', 'Sumo', 'manage_options', 'sumo', [
            $this,
            'sumome_render_dashboard_page'
        ], plugins_url('images/icon.png', SUMOME__PLUGIN_FILE));

        if(isset($_COOKIE['__smUser'])){
            add_submenu_page('sumo', 'Dashboard', 'Dashboard', 'manage_options', 'sumo', [
                $this,
                'sumome_render_dashboard_page'
            ]);
            add_submenu_page('sumo', 'Statistics', 'Statistics', 'manage_options', 'sumo-statistics', [
                $this,
                'sumome_render_statistics_page'
            ]);
            add_submenu_page('sumo', 'About', 'About', 'manage_options', 'sumo-about', [
                $this,
                'sumome_render_welcome_page'
            ]);
        }

        add_submenu_page('sumo', 'SiteID', 'SiteID', 'manage_options', 'sumo-siteID', [
            $this,
            'sumome_render_siteID_page'
        ]);
    }

    public function sanitize_site_id(string $value){
        return preg_replace('/[^0-9a-f]/', '', strtolower($value));
    }

    public function settings_field_site_id(array $args){
        $field = $args['field'];
        $value = get_option($field);

        ?>
        <script type="text/javascript">
            function sumome_generate_site_id() {
                const _sumome_r = () => (Math.random().toString(16) + "000000000").slice(2, 10);

                let new_sumome_site_id = '';
                for (let i = 0; i < 8; i++) {
                    new_sumome_site_id += _sumome_r();
                }

                jQuery('.sumome-site-id').val(new_sumome_site_id);
            }
        </script>
        <?php
        echo sprintf('<textarea type="text" name="%s" id="%s" class="sumome-site-id" />%s</textarea><button onclick="sumome_generate_site_id(); return false;" class="button">Get New Site ID</button>', $field, $field, esc_attr($value));
    }

    public function check_generate_site_id(){
        $site_id = get_option('sumome_site_id');

        if(!$site_id || $this->blacklisted_site_id($site_id)){
            list($usec, $sec) = explode(' ', microtime());
            $sumoSeed = (float) $sec + ((float) $usec * 100000);

            // Convert to integer before using in mt_srand()
            mt_srand((int) $sumoSeed);
            $site_id = '';
            for($i = 0; $i < 8; $i ++){
                $site_id .= substr(dechex(mt_rand()) . '000000000', 2, 8);
            }

            update_option('sumome_site_id', $site_id);
        }
    }

    private function blacklisted_site_id(string $site_id): bool{
        $blacklist = ['8ce3f35797bf87c1644e567db13d9b3c2d9422027c10a7874b3446c9283c9aad'];

        return $site_id && in_array($site_id, $blacklist, true);
    }

    public static function upgrade_manual_sumome_installation(){
        $wpThemeFiles = ['header', 'footer'];
        foreach($wpThemeFiles as $wpThemeFile){
            $themeFile = get_template_directory() . '/' . $wpThemeFile . '.php';

            if(file_exists($themeFile) && is_writable($themeFile)){
                $themeFile_contents = file_get_contents($themeFile);

                $manuallyInsertedScriptTagSiteID = '';
                $findSiteID                      = [];
                $siteIDLine                      = '';

                libxml_use_internal_errors(true);
                $pageDom = new DOMDocument('1.0', 'utf-8');
                $pageDom->loadHTML($themeFile_contents);
                $scripts = $pageDom->getElementsByTagName('script');

                for($i = 0; $i < $scripts->length; $i ++){

                    $scriptDoc = new DOMDocument('1.0', 'utf-8');
                    $scriptDoc->appendChild($scriptDoc->importNode($scripts->item($i), true));
                    $scriptLine = $scriptDoc->saveHTML();

                    if($scriptLine){
                        $dom = new DOMDocument('1.0', 'utf-8');
                        $dom->loadHTML($scriptLine);
                        $nodes = $dom->getElementsByTagName('script');

                        if(substr_count($scriptLine, 'data-sumo-site-id') > 0){
                            $manuallyInsertedScriptTagSiteID = $nodes->item(0)->getAttribute('data-sumo-site-id');
                        }else{
                            $scriptBreakdown = explode(';', $scriptLine);

                            if($scriptBreakdown){
                                foreach($scriptBreakdown as $scriptBreakdownSpec){
                                    if(substr_count($scriptBreakdownSpec, 'j.dataset.sumoSiteId')){
                                        $siteIDLine = $scriptBreakdownSpec;
                                    }
                                }
                            }
                            $findSiteID[]                    = "'";
                            $findSiteID[]                    = 'j.dataset.sumoSiteId=';
                            $manuallyInsertedScriptTagSiteID = str_replace($findSiteID, '', $siteIDLine);
                        }
                    }
                }

                if(trim($manuallyInsertedScriptTagSiteID) !== ''){

                    //save users site ID from the manually inserted tag
                    update_option('sumome_site_id', $manuallyInsertedScriptTagSiteID);

                    $sumomeScriptTag[]  = '<script src="//load.sumome.com/" data-sumo-site-id="' . esc_attr($manuallyInsertedScriptTagSiteID) . '" async="async"></script>';
                    $sumomeScriptTag[]  = "<script async>(function(s,u,m,o,j,v){j=u.createElement(m);v=u.getElementsByTagName(m)[0];j.async=1;j.src=o;j.dataset.sumoSiteId='" . esc_attr($manuallyInsertedScriptTagSiteID) . "';v.parentNode.insertBefore(j,v)})(window,document,'script','//load.sumome.com/');</script>";
                    $modified_themeFile = str_replace($sumomeScriptTag, '', $themeFile_contents);

                    //make backup of theme file just in case
                    copy($themeFile, get_template_directory() . '/' . $wpThemeFile . '.bak[' . date('Y-m-d_H.i.s') . '].php');

                    //remove manually inserted SumoMe tag
                    if(trim($modified_themeFile)){
                        file_put_contents($themeFile, $modified_themeFile);
                    }
                }
            }
        }
    }

    public function append_script_code(){
        $this->check_generate_site_id();

        $site_id = get_option('sumome_site_id');

        if($site_id){
            echo("<script async>(function(s,u,m,o,j,v){j=u.createElement(m);v=u.getElementsByTagName(m)[0];j.async=1;j.src=o;j.dataset.sumoSiteId='" . esc_attr($site_id) . "';j.dataset.sumoPlatform='" . $this->dataSumoPlatform . "';v.parentNode.insertBefore(j,v)})(window,document,'script','//load.sumome.com/');</script>");
        }
    }

    public function append_admin_script_code(){
        if(defined('XMLRPC_REQUEST') || defined('DOING_AJAX') || defined('IFRAME_REQUEST')){
            return false;
        }

        $this->check_generate_site_id();

        $site_id = get_option('sumome_site_id');

        if($site_id){
            include(SUMOME__PLUGIN_DIR . '/js/preload.php');
            echo("<script async>(function(s,u,m,o,j,v){j=u.createElement(m);v=u.getElementsByTagName(m)[0];j.async=1;j.src=o;j.dataset.sumoSiteId='" . esc_attr($site_id) . "';j.dataset.sumoPlatform='" . $this->dataSumoPlatform . "';j.dataset.sumoMode='admin';v.parentNode.insertBefore(j,v)})(window,document,'script','//load.sumome.com/');</script>");
        }
    }

    public function admin_enqueue_scripts(){
        wp_enqueue_style('sumome-admin-styles', plugins_url("styles/styles.css", SUMOME__PLUGIN_FILE));
        wp_enqueue_style('sumome-admin-media', plugins_url("styles/media.css", SUMOME__PLUGIN_FILE));
    }

    public function sumome_render_welcome_page(){
        $noClose = true;
        print '<div class="sumome-plugin-container"><div class="sumome-plugin-main">';
        include(SUMOME__PLUGIN_DIR . '/views/wordpress-dashboard-welcome-page.php');
        print '</div></div>';
        $this->sumome_plugin_only();
    }

    public function sumome_render_dashboard_page(){
        include(SUMOME__PLUGIN_DIR . '/js/general.php');
        include(SUMOME__PLUGIN_DIR . '/views/landing.php');
        $this->sumome_plugin_only();
    }

    /**
     * Renders the SumoMe statistics page with appropriate styles.
     */
    public function sumome_render_statistics_page(){
        print '<link rel="stylesheet" type="text/css" href="' . plugins_url('styles/statistics.css', __DIR__) . '">';
        include(SUMOME__PLUGIN_DIR . '/views/statistics.php');
        $this->sumome_plugin_only();
    }

    public function sumome_render_siteID_page(){
        include(SUMOME__PLUGIN_DIR . '/views/siteID.php');
        $this->sumome_plugin_only();
    }

    public function sumome_plugin_only(){
        ?>
        <script>
            function sumo_logout_redirect() {
                setTimeout(function () {
                    document.location.href = '<?php print admin_url('admin.php?page=sumo')?>';
                }, 500);
            }
        </script>
        <?php
    }

    public function sumome_plugin_footer(){
        include(SUMOME__PLUGIN_DIR . '/views/footer.php');
    }

    public function ajax_sumome_main(){
        include(SUMOME__PLUGIN_DIR . '/views/main.php');
        $this->sumome_plugin_footer();
        exit;
    }

    public function ajax_sumome_dashboard_welcome(){
        include(SUMOME__PLUGIN_DIR . '/views/wordpress-dashboard-welcome-page.php');
        exit;
    }

    public function ajax_sumome_hide_dashboard_overlay(){
        update_option('sumome_hide_dashboard_overlay', 1);
    }

    public static function ajax_sumome_show_dashboard_overlay(){
        update_option('sumome_hide_dashboard_overlay', 0);
    }

    public function dashboard_setup(){
        $widget_name = '<i class="dashicons-before" aria-hidden="true"><img src="' . plugins_url('images/icon_dark.png', SUMOME__PLUGIN_FILE) . '"</i> Sumo';
        add_meta_box('my_dashboard_widget', $widget_name, [$this, 'dashboard_widget'], 'dashboard', 'normal', 'high');
    }

    /**
     * Displays the dashboard widget for the SumoMe plugin.
     *
     * This method checks various conditions to determine if the dashboard widget should be minimized.
     * It sets the widget to 'minimized' if the user has a specific cookie set, if the 'endurance_user' option
     * is not 1, if the 'sumome_hide_dashboard_overlay' option is set to 1, or if the current time is within an hour
     * of the initial dashboard load time. It also updates the 'sumome_initial_wpdashboard_load_time' option
     * if it's not already set and includes a bit of JavaScript code for additional functionality.
     */
    public function dashboard_widget(){
        $dashboardWidgetClass = '';

        $enduranceUser                  = get_option('endurance_user');
        $sumoMeInitialDashboardLoadTime = get_option('sumome_initial_wpdashboard_load_time');

        if(!$sumoMeInitialDashboardLoadTime){
            $sumoMeInitialDashboardLoadTime = date('YmdHis');
            update_option('sumome_initial_wpdashboard_load_time', $sumoMeInitialDashboardLoadTime);
        }

        $date = new DateTime($sumoMeInitialDashboardLoadTime);
        $date->modify('+1 hour');
        $sumoMeInitialDashboardLoadTimePlusHour = $date->format('YmdHis');

        if(isset($_COOKIE['__smUser']) ||
           $enduranceUser !== 1 ||
           get_option('sumome_hide_dashboard_overlay') === 1 ||
           date('YmdHis') < $sumoMeInitialDashboardLoadTimePlusHour
        ){
            $dashboardWidgetClass = 'minimized';
        }

        if(!$sumoMeInitialDashboardLoadTime){
            update_option('sumome_initial_wpdashboard_load_time', date('YmdHis'));
        }

        include_once(SUMOME__PLUGIN_DIR . '/js/general.php');
        echo '<div class="sumome-plugin-dashboard-widget ' . $dashboardWidgetClass . '"></div>';
        ?>
        <script>
            jQuery.post(ajaxurl, {action: 'sumome_dashboard_welcome'},
                function (data) {
                    jQuery('.sumome-plugin-dashboard-widget').html(data);
                });

            function sumo_logout_redirect() {
                const loggedInElements = jQuery('.sumome-wp-dash-logged-in');
                loggedInElements.removeClass('status-logged-in').addClass('status-logged-out');
                const loggedOutElements = jQuery('.sumome-wp-dash-logged-out');
                loggedOutElements.removeClass('status-logged-in').addClass('status-logged-out');
            }
        </script>
        <?php
    }

    public function ajax_sumo_add_woocommerce_coupon(){
        $code = $_POST['code'];
        WC()->cart->apply_coupon($code);
        wp_die();
    }

    public function ajax_sumo_remove_woocommerce_coupon(){
        //If the current logged-in user is an Administrator
        if(current_user_can('manage_options')){
            $code = $_POST['code'];
            WC()->cart->remove_coupon($code);
        }
        wp_die();
    }

    public function ajax_sumo_get_woocommerce_cart_subtotal(){
        echo WC()->cart->subtotal;
        wp_die();
    }

    public function woocommerce_cart_scripts(){
        ?>
        <script type="application/javascript">
            const ajaxURL = "<?php echo admin_url('admin-ajax.php'); ?>";

            function sumo_add_woocommerce_coupon(code) {
                jQuery.post(ajaxURL, {
                    action: 'sumo_add_woocommerce_coupon',
                    code: code,
                });
            }

            function sumo_remove_woocommerce_coupon(code) {
                jQuery.post(ajaxURL, {
                    action: 'sumo_remove_woocommerce_coupon',
                    code: code,
                });
            }

            function sumo_get_woocommerce_cart_subtotal(callback) {
                jQuery.ajax({
                    method: 'POST',
                    url: ajaxURL,
                    dataType: 'html',
                    data: {
                        action: 'sumo_get_woocommerce_cart_subtotal',
                    },
                    success: function (subtotal) {
                        return callback(null, subtotal);
                    },
                    error: function (err) {
                        return callback(err, 0);
                    }
                });
            }
        </script>
        <?php
    }

}