<?php
/**
 * @package   Affinite Back in Stock
 * @author    Vladislav Musílek
 * @license   GPL-2.0+
 * @link      https://affinite.io
 * @copyright 2024 Affinite.io
 */

class Affinite_Back_In_Stock
{

    /**
     * Plugin version, used for cache-busting of style and script file references.
     *
     * @since   1.0
     *
     * @var     string
     */
    const VERSION = '1.0';

    /**
     *
     * @since    1.0
     *
     * @var      string
     */
    protected $plugin_slug = 'affinite-back-in-stock';

    /**
     * Instance of this class.
     *
     * @since    1.0
     *
     * @var      object
     */
    protected static $instance = null;

    /**
     * Initialize the plugin by setting localization and loading public scripts
     * and styles.
     *
     * @since     1.0
     */
    private function __construct()
    {

        // Load plugin text domain
        add_action('init', array($this, 'load_plugin_textdomain'));

        // Activate plugin when new blog is added
        add_action('wpmu_new_blog', array($this, 'activate_new_site'));

        // Load public-facing style sheet and JavaScript.
        add_action('wp_enqueue_scripts', array($this, 'enqueue_styles'));
        add_action('wp_enqueue_scripts', array($this, 'enqueue_scripts'));

        add_action('woocommerce_single_product_summary', array($this, 'stock_alert_button'), 32);
        add_action('stock_alert_button', array($this, 'stock_alert_button'), 32);

        add_action('wp_footer', array($this, 'modal_code'), 10);

        add_action('wp_ajax_stock_alert_form', array($this, 'stock_alert_form'));
        add_action('wp_ajax_nopriv_stock_alert_form', array($this, 'stock_alert_form'));

		add_action('wp_ajax_get_stock_alert_form', array($this, 'get_stock_alert_form'));
        add_action('wp_ajax_nopriv_get_stock_alert_form', array($this, 'get_stock_alert_form'));

        add_filter('woocommerce_locate_template', array($this, 'toret_locate_template'), 10, 3);

        //Trigger for stock change
        add_action('woocommerce_product_set_stock', array($this, 'send_alert'));
        add_action('woocommerce_variation_set_stock', array($this, 'send_alert'));
        
    }


    /**
     * Return the plugin slug.
     *
     * @return    Plugin slug variable.
     * @since    1.0
     *
     */
    public function get_plugin_slug()
    {
        return $this->plugin_slug;
    }

    /**
     * Return an instance of this class.
     *
     * @return    object    A single instance of this class.
     * @since     1.0
     *
     */
    public static function get_instance()
    {

        // If the single instance hasn't been set, set it now.
        if (null == self::$instance) {
            self::$instance = new self;
        }

        return self::$instance;
    }

    /**
     * Fired when the plugin is activated.
     *
     * @param boolean $network_wide True if WPMU superadmin uses
     *                                       "Network Activate" action, false if
     *                                       WPMU is disabled or plugin is
     *                                       activated on an individual blog.
     * @since    1.0
     *
     */
    public static function activate($network_wide)
    {

        if (function_exists('is_multisite') && is_multisite()) {

            if ($network_wide) {

                // Get all blog ids
                $blog_ids = self::get_blog_ids();

                foreach ($blog_ids as $blog_id) {

                    switch_to_blog($blog_id);
                    self::single_activate();
                }

                restore_current_blog();

            } else {
                self::single_activate();
            }

        } else {
            self::single_activate();
        }

    }

    /**
     * Fired when the plugin is deactivated.
     *
     * @param boolean $network_wide True if WPMU superadmin uses
     *                                       "Network Deactivate" action, false if
     *                                       WPMU is disabled or plugin is
     *                                       deactivated on an individual blog.
     * @since    1.0
     *
     */
    public static function deactivate($network_wide)
    {

        if (function_exists('is_multisite') && is_multisite()) {

            if ($network_wide) {

                // Get all blog ids
                $blog_ids = self::get_blog_ids();

                foreach ($blog_ids as $blog_id) {

                    switch_to_blog($blog_id);
                    self::single_deactivate();

                }

                restore_current_blog();

            } else {
                self::single_deactivate();
            }

        } else {
            self::single_deactivate();
        }

    }

    /**
     * Fired when a new site is activated with a WPMU environment.
     *
     * @param int $blog_id ID of the new blog.
     * @since    1.0
     *
     */
    public function activate_new_site($blog_id)
    {

        if (1 !== did_action('wpmu_new_blog')) {
            return;
        }

        switch_to_blog($blog_id);
        self::single_activate();
        restore_current_blog();

    }

    /**
     * Get all blog ids of blogs in the current network that are:
     * - not archived
     * - not spam
     * - not deleted
     *
     * @return   array|false    The blog ids, false if no matches.
     * @since    1.0
     *
     */
    private static function get_blog_ids()
    {

        global $wpdb;

        // get an array of blog ids
        // Multisite blogs table - direct query is necessary for network-wide activation.
        // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
        return $wpdb->get_col(
            $wpdb->prepare(
                "SELECT blog_id FROM {$wpdb->blogs} WHERE archived = %s AND spam = %s AND deleted = %s",
                '0',
                '0',
                '0'
            )
        );

    }


    /**
     * Fired for each blog when the plugin is activated.
     *
     * @since    1.0
     */
    private static function single_activate()
    {

        global $wpdb;

        $wpdb->hide_errors();

        $collate = '';

        if ($wpdb->has_cap('collation')) {
            if (!empty($wpdb->charset)) {
                $collate .= "DEFAULT CHARACTER SET $wpdb->charset";
            }
            if (!empty($wpdb->collate)) {
                $collate .= " COLLATE $wpdb->collate";
            }
        }

        require_once(ABSPATH . 'wp-admin/includes/upgrade.php');

        $table = "
	        	CREATE TABLE IF NOT EXISTS {$wpdb->prefix}stock_alert (
  					`ID` bigint(255) NOT NULL AUTO_INCREMENT,
  					`date` varchar(100) COLLATE utf8_czech_ci NOT NULL,
  					`name` longtext COLLATE utf8_czech_ci NOT NULL,
  					`surname` longtext COLLATE utf8_czech_ci NOT NULL,
  					`email` varchar(100) COLLATE utf8_czech_ci NOT NULL,
  					`productid` varchar(10) COLLATE utf8_czech_ci NOT NULL,
  					`send` int(2) COLLATE utf8_czech_ci NOT NULL,
  					`senddate` varchar(100) COLLATE utf8_czech_ci NOT NULL,
  				PRIMARY KEY (`ID`),
				KEY `productid` (`productid`),
				KEY `email` (`email`),
        		KEY `date` (`date`)
	         	) $collate;
	      	";
        dbDelta($table);
        
    }

    /**
     * Fired for each blog when the plugin is deactivated.
     *
     * @since    1.0
     */
    private static function single_deactivate()
    {

    }

    /**
     * Load the plugin text domain for translation.
     *
     * @since    1.0
     */
    public function load_plugin_textdomain()
    {

        $domain = $this->plugin_slug;
        // WordPress core filter hook - part of WordPress API.
        // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound
        $locale = apply_filters('plugin_locale', get_locale(), $domain);        
    	load_textdomain($domain, AFFINITEPSADIR . 'languages/' . $domain . '-' . $locale . '.mo');        

    }


    /**
     * Register and enqueue public-facing style sheet.
     *
     * @since    1.0
     */
    public function enqueue_styles() {

        wp_enqueue_style( $this->plugin_slug . '-popup', AFFINITEPSAURL . 'public/assets/css/popup.min.css', array(), self::VERSION );
		wp_enqueue_style( $this->plugin_slug . '-plugin-style', AFFINITEPSAURL . 'public/assets/css/public.min.css', array(), self::VERSION );

    }

    /**
     * Register and enqueues public-facing JavaScript files.
     *
     * @since    1.0
     */
    public function enqueue_scripts() {

        if ( !is_checkout() ) {
           
			wp_enqueue_script( $this->plugin_slug . '-plugin-script', AFFINITEPSAURL . 'public/assets/js/public.min.js', array(), self::VERSION, true );

            wp_localize_script($this->plugin_slug . '-plugin-script', 'wcp_localize', array(
                'ajaxurl' 				=> admin_url() . 'admin-ajax.php',
                'homeurl' 				=> home_url(),
                'wc_ajax_url' 			=> WC_AJAX::get_endpoint("%%endpoint%%"),
                'undefined_name'		=> esc_html__('Please fill your name', 'affinite-back-in-stock'),
                'undefined_secondname' 	=> esc_html__('Please fill your second name', 'affinite-back-in-stock'),
                'undefined_email' 		=> esc_html__('Please fill your e-mail', 'affinite-back-in-stock'),
				'not_valid_email' 		=> esc_html__('Please enter a valid e-mail', 'affinite-back-in-stock')
            ));
        }

    }

    /**
     * Force WooCommerce to load email template from plugin
     *
     * @since    1.0.0
     */
    public function toret_locate_template($template, $template_name, $template_path) {

        if ($template_name == 'stock-alert-admin-email.php') {
            $template = AFFINITEPSADIR . 'includes/emails/stock-alert-admin-email.php';
        } elseif ($template_name == 'stock-alert-admin-email-plain.php') {
            $template = AFFINITEPSADIR . 'includes/emails/stock-alert-admin-email-plain.php';
        }

        if ($template_name == 'stock-alert-customer-email.php') {
            $template = AFFINITEPSADIR . 'includes/emails/stock-alert-customer-email.php';
        } elseif ($template_name == 'stock-alert-customer-email-plain.php') {
            $template = AFFINITEPSADIR . 'includes/emails/stock-alert-customer-email-plain.php';
        }

        if ($template_name == 'stock-alert-customer-save-email.php') {
            $template = AFFINITEPSADIR . 'includes/emails/stock-alert-customer-save-email.php';
        } elseif ($template_name == 'stock-alert-customer-save-email-plain.php') {
            $template = AFFINITEPSADIR . 'includes/emails/stock-alert-customer-save-email-plain.php';
        }

        return $template;

    }

    /**
     * Render stock alert button
     *
     * @since    1.0
     */
    public function stock_alert_button() {

		$option = get_option('affinite_stock_alert');

		if ( !empty( $option['product-button-text'] ) ) {
			$button_text = $option['product-button-text'];			
		} else {
			$button_text = esc_html__( 'Notify me when this product is available', 'affinite-back-in-stock' );
		}
		
		global $product;
		if ( ! $product || ! is_a( $product, 'WC_Product' ) ) {
			return;
		}
        if ('variable' == $product->get_type()) {
            $available_variations = $product->get_available_variations();
            
            if ( empty( $available_variations ) ) {
                ?>
				<span 
					id="stock-alert-button" 		
					class="stock-alert-button open-popup" 
					data-type="variable" 
					data-productid="<?php echo esc_html( $product->get_id() ); ?>"					
				>
					<?php echo esc_html( $button_text ); ?>
				</span>
				<?php 
            } else {
				?>
				<span 
					id="stock-alert-button" 	
					class="stock-alert-button open-popup" 
					data-type="variable" 
					data-productid="<?php echo esc_html( $product->get_id() ); ?>"
					style="display:none;"
				>
					<?php echo esc_html( $button_text ); ?>
				</span>
				<?php                
            }

        } else {
			if ( !$product->is_in_stock() ) {
				?>
                <span 
					id="stock-alert-button" 		
					class="stock-alert-button open-popup" 
					data-type="<?php echo esc_html( $product->get_type() ); ?>" 
					data-productid="<?php echo esc_html( $product->get_id() ); ?>"
				>
					<?php echo esc_html( $button_text ); ?>
				</span>
				<?php
            }
        }
    }


    /**
     * Render modal code
     *
     * @since    1.0
     */
    public function modal_code() {
	?>

		<div id="popup" class="popup">
			<div class="popup-inner">
				<span id="closePopup" class="close-btn close-popup"></span>
				<div class="popup-content">
					<form action="#" method="post" id="popup-alert-form" class="popup-alert-stock"></form>					
				</div>
			</div>
		</div>			
			
    	<?php
    }

	/**
     * Get stock alert form
     *
     * @since    1.0
     */
    public function get_stock_alert_form() {

		$option = get_option('affinite_stock_alert');

        //Get option or default data
        if (!empty($option['popup-header-text'])) {
            $popup_header_text = esc_html( $option['popup-header-text'] );
        } else {
            $popup_header_text = esc_html__('Notify me when this product is available', 'affinite-back-in-stock');
        }
        if (!empty($option['button-text'])) {
            $button_text = esc_html( $option['button-text'] );
        } else {
            $button_text = esc_html__('Notify me', 'affinite-back-in-stock');
        }
        if (!empty($option['gdpr-text'])) {
            $gdpr_text = esc_html( $option['gdpr-text'] );
        } else {
            $gdpr_text = esc_html__('Your data will be used only for email notification, about product avaibility.', 'affinite-back-in-stock');
        }
        if (!empty($option['succes-title'])) {
            $success_title = esc_html( $option['succes-title'] );
        } else {
            $success_title = esc_html__('Thank you', 'affinite-back-in-stock');
        }
        if (!empty($option['succes-subtitle'])) {
            $success_subtitle = esc_html( $option['succes-subtitle'] );
        } else {
            $success_subtitle = esc_html__('We send you an e-mail when product will be availible again.', 'affinite-back-in-stock');
        }
        if (!empty($option['succes-button-text'])) {
            $success_button_text = esc_html( $option['succes-button-text'] );
        } else {
            $success_button_text = esc_html__('Close', 'affinite-back-in-stock');
        }
        if (!empty($option['duplicite-email-title'])) {
            $duplicite_email_title = esc_html( $option['duplicite-email-title'] );
        } else {
            $duplicite_email_title = esc_html__('Your e-mail is allready in database', 'affinite-back-in-stock');
        }
        if (!empty($option['duplicite-email-subtitle'])) {
            $duplicite_email_subtitle = esc_html( $option['duplicite-email-subtitle'] );
        } else {
            $duplicite_email_subtitle = esc_html__('We send you an e-mail when product will be availible again.', 'affinite-back-in-stock');
        }
        if (!empty($option['duplicite-email-button-text'])) {
            $duplicite_email_button_text = esc_html( $option['duplicite-email-button-text'] );
        } else {
            $duplicite_email_button_text = esc_html__('Close', 'affinite-back-in-stock');
        }

		ob_start();
		?>

		<header>
			<h3 class="popup-alert-title"><?php echo esc_html( $popup_header_text ); ?></h3>
		</header>
		<div class="popup-alert-body">
			<ul>
				<li>
					<label for="alert-first-name"><?php esc_html_e( 'First Name', 'affinite-back-in-stock' ); ?></label>
					<input type="text" name="alert-first-name" class="alert-first-name" id="alert-first-name" placeholder="<?php esc_html_e('First Name', 'affinite-back-in-stock'); ?>"></li>
				<li>
					<label for="alert-last-name"><?php esc_html_e('Last Name', 'affinite-back-in-stock'); ?></label>
					<input type="text" name="alert-last-name" class="alert-last-name" id="alert-last-name" placeholder="<?php esc_html_e('Last Name', 'affinite-back-in-stock'); ?>"></li>
				<li>
					<label for="alert-email"><?php esc_html_e('Email:', 'affinite-back-in-stock'); ?> </label>
					<input type="email" name="alert-email" class="alert-email" id="alert-email" placeholder="<?php esc_html_e( 'Your Email', 'affinite-back-in-stock'); ?>"></li>
			</ul>
			<input type="hidden" name="alert-productid" class="alert-productid" value="" />
			<input type="text" id="alert-username" class="alert-username" name="username" style="visibility:hidden;height:0;margin:0;padding:0;border:0;" />
			<?php wp_nonce_field('stock_alert_form', 'stock_alert_form_nonce'); ?>
		</div>
		<div class="gdpr-text"><?php echo esc_html( $gdpr_text ); ?></div>
		<footer>
			<button type="submit" id="stock-alert-submit" class="popup-alert-submit"><?php echo esc_html( $button_text ); ?></button>
		</footer>
		<?php

		$html = ob_get_clean();
		$reponse = array(
			'status' => 'success',
			'html' => $html			
		);
		wp_send_json( $reponse );

	}

    /**
     * Save data
     *
     * @since    1.0
     */
    public function stock_alert_form() {

		if ( ! isset($_POST['nonce']) || ! wp_verify_nonce(sanitize_text_field( wp_unslash ( $_POST['nonce'] ) ), 'stock_alert_form') ) {
			wp_send_json_error('Nonce validation failed', 403);
		}

        $check = true;

		$option = get_option('affinite_stock_alert');

        //Get option or default data
        if (!empty($option['succes-title'])) {
            $success_title = esc_html( $option['succes-title'] );
        } else {
            $success_title = esc_html__('Thank you', 'affinite-back-in-stock');
        }
        if (!empty($option['succes-subtitle'])) {
            $success_subtitle = esc_html( $option['succes-subtitle'] );
        } else {
            $success_subtitle = esc_html__('We send you an e-mail when product will be availible again.', 'affinite-back-in-stock');
        }
        if (!empty($option['succes-button-text'])) {
            $success_button_text = esc_html( $option['succes-button-text'] );
        } else {
            $success_button_text = esc_html__('Close', 'affinite-back-in-stock');
        }
        if (!empty($option['duplicite-email-title'])) {
            $duplicite_email_title = esc_html( $option['duplicite-email-title'] );
        } else {
            $duplicite_email_title = esc_html__('Your e-mail is allready in database', 'affinite-back-in-stock');
        }
        if (!empty($option['duplicite-email-subtitle'])) {
            $duplicite_email_subtitle = esc_html( $option['duplicite-email-subtitle'] );
        } else {
            $duplicite_email_subtitle = esc_html__('We send you an e-mail when product will be availible again.', 'affinite-back-in-stock');
        }
        if (!empty($option['duplicite-email-button-text'])) {
            $duplicite_email_button_text = esc_html( $option['duplicite-email-button-text'] );
        } else {
            $duplicite_email_button_text = esc_html__('Close', 'affinite-back-in-stock');
        }

		$error_type = null;

        if (!empty($_POST['first_name'])) {
            $name = sanitize_text_field( wp_unslash( $_POST['first_name'] ) );
        } else {
            $check = false;
			$error_type = 'empty_first_name';
        }

        if (!empty($_POST['last_name'])) {
            $surname = sanitize_text_field( wp_unslash( $_POST['last_name'] ) );
        } else {
            $check = false;
			$error_type = 'empty_last_name';
        }

        if (!empty($_POST['email'])) {
            $email = sanitize_email( wp_unslash( $_POST['email'] ) );
            if ( ! is_email( $email ) ) {
                $check = false;
                $error_type = 'invalid_email';
            }
        } else {
            $check = false;
			$error_type = 'empty_email';
        }

        if (!empty($_POST['product_id'])) {
            $productid = absint( wp_unslash( $_POST['product_id'] ) );
            if ( empty( $productid ) ) {
                $check = false;
                $error_type = 'empty_productid';
            }
        } else {
            $check = false;
			$error_type = 'empty_productid';
        }

        if ($check === false) {

            $reponse = array(
                'status' => 'failed',
                'message' => esc_html__('Unknow form error', 'affinite-back-in-stock'),
				'error_type'=> $error_type
            );
            wp_send_json( $reponse );

        } else {
			
            global $wpdb;
            // Custom plugin table - direct query is necessary.
            // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
            $check_email = $wpdb->get_results($wpdb->prepare(
				"SELECT * FROM " . $wpdb->prefix . "stock_alert WHERE email = %s AND productid = %s AND send = 1",
				array(
					$email,
					$productid
				)
			));
			if (!empty($check_email[0]->email)) {

				$html = '<h3>' . esc_html( $duplicite_email_title ) . '</h3>';
				$html .= '<p>' . esc_html( $duplicite_email_subtitle ) . '</p>';
				$html .= '<p><span class="popup-response-close close-popup">' . esc_html( $duplicite_email_button_text ) . '</span></p>';

                $reponse = array(
                    'status' => 'duplicate',
					'html' => $html
                );
                wp_send_json( $reponse );

            } else {

                $data = array();
                $data['date'] = time();
                $data['name'] = $name;
                $data['surname'] = $surname;
                $data['email'] = $email;
                $data['productid'] = $productid;
                //Not send
                $data['send'] = 1;
                $data['senddate'] = 'no';

                global $wpdb;
                // Custom plugin table - direct query is necessary for data insertion.
                // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
                $wpdb->insert($wpdb->prefix . 'stock_alert', $data);

                // Custom plugin table - direct query is necessary.
                // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
                $number = $wpdb->get_var(
					$wpdb->prepare(
						"SELECT COUNT( ID ) FROM " . $wpdb->prefix . "stock_alert WHERE productid = %d AND send = '1'",
						array(
							$productid
						)
					)
				);				

                $option = get_option('affinite_stock_alert');

                if( !empty( $option['product_count'] ) && $number > $option['product_count'] ){

                	//Send email to admin!!!
                	WC()->mailer();
                	if ( file_exists( AFFINITEPSADIR . 'includes/class-stock-alert-admin-email.php' ) ) {
                		require_once(AFFINITEPSADIR . 'includes/class-stock-alert-admin-email.php');
                		if ( class_exists( 'Affinite_Alert_Admin_Email' ) ) {
                			$send = new Affinite_Alert_Admin_Email();
                			$mail = $send->trigger($productid);
                		}
                	}

                }

                //Send email to customer
                WC()->mailer();
                if ( file_exists( AFFINITEPSADIR . 'includes/class-stock-alert-customer-save-email.php' ) ) {
                	require_once(AFFINITEPSADIR . 'includes/class-stock-alert-customer-save-email.php');
                	if ( class_exists( 'Affinite_Alert_Customer_Save_Email' ) ) {
                		$send = new Affinite_Alert_Customer_Save_Email();
                		$mail = $send->trigger($productid, $email);
                	}
                }

				$html = '<h3>' . esc_html( $success_title ) . '</h3>';
				$html .= '<p>' . esc_html( $success_subtitle ) . '</p>';
				$html .= '<p><span class="popup-response-close close-popup">' . esc_html( $success_button_text ) . '</span></p>';

                $reponse = array(
                    'status' => 'success',
                    'html'   => $html
                );
                wp_send_json( $reponse );

            }

        }
    }

    /**
     * Send alert
     *
     * @since    1.0
     */
    public function send_alert(WC_Product $product){
        if ($this->is_product_in_stock($product)) {
            if ('variation' == $product->get_type()) {
                $product_id = $product->get_parent_id();
            } else {
                $product_id = $product->get_id();
            }
            global $wpdb;
            // Custom plugin table - direct query is necessary.
            // phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
            $data = $wpdb->get_results($wpdb->prepare(
				"SELECT * FROM " . $wpdb->prefix . "stock_alert WHERE productid = %d AND send = 1",
				array(
					$product_id
				)
			));
            if (!empty($data)) {
                WC()->mailer();
                if ( file_exists( AFFINITEPSADIR . 'includes/class-stock-alert-customer-email.php' ) ) {
                	require_once(AFFINITEPSADIR . 'includes/class-stock-alert-customer-email.php');
                	if ( class_exists( 'Affinite_Alert_Customer_Email' ) ) {
                		$send = new Affinite_Alert_Customer_Email();
                		$mail = $send->trigger($product_id);
                	}
                }

            }

        }

    }

	/**
     * Check if product is in stock
     *
     * @since    1.0
     */
    private function is_product_in_stock($product){
        $in_stock = false;

        if ($product !== null && $product instanceof WC_Product) {
            if ($product->is_type('variable')) {
                $variantions = $product->get_children();
                foreach ($variantions as $variantion) {
                    $var_product = wc_get_product($variantion);
                    $stock_quantity = $var_product->get_stock_quantity();
                    if ($stock_quantity > 0) {
                        $in_stock = true;
                        continue;
                    }
                }

                return $in_stock;
            } else {
                return $product->get_stock_quantity() > 0;
            }
        }

        return $in_stock;
    }

}//End class