<?php
if ( ! defined( 'ABSPATH' ) ) exit;

class AGENLI_Analytics {

    public static function init() {
        add_action( 'wp_enqueue_scripts', array( __CLASS__, 'enqueue_tracking_scripts' ) );
        add_action( 'wp_footer',          array( __CLASS__, 'inject_footer_tags' ), 99 );
        add_action( 'wp_head',            array( __CLASS__, 'inject_meta_tags' ), 2 );
    }

    public static function enqueue_tracking_scripts() {
        $gtm     = agenli_get_option( 'analytics_gtm_id' );
        $ga4     = agenli_get_option( 'analytics_ga4_id' );
        $clarity = agenli_get_option( 'analytics_clarity_id' );
        $meta    = agenli_get_option( 'analytics_meta_pixel' );
        $tiktok  = agenli_get_option( 'analytics_tiktok_pixel' );
        $hotjar  = agenli_get_option( 'analytics_hotjar_id' );

        if ( $gtm ) {
            wp_enqueue_script(
                'agenli-gtm',
                'https://www.googletagmanager.com/gtm.js?id=' . rawurlencode( $gtm ),
                array(),
                null, // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
                false
            );
            $gtm_init = '(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({"gtm.start":new Date().getTime(),event:"gtm.js"});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!="dataLayer"?"&l="+l:"";j.async=true;j.src="https://www.googletagmanager.com/gtm.js?id="+i+dl;f.parentNode.insertBefore(j,f);})(window,document,"script","dataLayer","' . esc_js( $gtm ) . '");';
            wp_add_inline_script( 'agenli-gtm', $gtm_init, 'before' );
        }

        if ( $ga4 && ! $gtm ) {
            wp_enqueue_script(
                'agenli-ga4',
                'https://www.googletagmanager.com/gtag/js?id=' . rawurlencode( $ga4 ),
                array(),
                null, // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
                false
            );
            $ga4_config = 'window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments);}gtag("js",new Date());gtag("config","' . esc_js( $ga4 ) . '");';
            wp_add_inline_script( 'agenli-ga4', $ga4_config, 'after' );
        }

        if ( $clarity ) {
            wp_enqueue_script(
                'agenli-clarity',
                'https://www.clarity.ms/tag/' . rawurlencode( $clarity ),
                array(),
                null, // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
                true
            );
            $clarity_init = '(function(c,l,a,r,i,t,y){c[a]=c[a]||function(){(c[a].q=c[a].q||[]).push(arguments)};t=l.createElement(r);t.async=1;t.src="https://www.clarity.ms/tag/"+i;y=l.getElementsByTagName(r)[0];y.parentNode.insertBefore(t,y);})(window,document,"clarity","script","' . esc_js( $clarity ) . '");';
            wp_add_inline_script( 'agenli-clarity', $clarity_init, 'before' );
        }

        if ( $meta ) {
            wp_enqueue_script(
                'agenli-meta-pixel',
                'https://connect.facebook.net/en_US/fbevents.js',
                array(),
                null, // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
                true
            );
            $meta_init = '!function(f,b,e,v,n,t,s){if(f.fbq)return;n=f.fbq=function(){n.callMethod?n.callMethod.apply(n,arguments):n.queue.push(arguments)};if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version="2.0";n.queue=[];t=b.createElement(e);t.async=!0;t.src=v;s=b.getElementsByTagName(e)[0];s.parentNode.insertBefore(t,s)}(window,document,"script","https://connect.facebook.net/en_US/fbevents.js");fbq("init","' . esc_js( $meta ) . '");fbq("track","PageView");';
            wp_add_inline_script( 'agenli-meta-pixel', $meta_init, 'before' );
        }

        if ( $tiktok ) {
            wp_enqueue_script(
                'agenli-tiktok',
                'https://analytics.tiktok.com/i18n/pixel/events.js',
                array(),
                null, // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
                true
            );
            $tiktok_init = '!function(w,d,t){w.TiktokAnalyticsObject=t;var ttq=w[t]=w[t]||[];ttq.methods=["page","track","identify","instances","debug","on","off","once","ready","alias","group","enableCookie","disableCookie"];ttq.setAndDefer=function(t,e){t[e]=function(){t.push([e].concat(Array.prototype.slice.call(arguments,0)))}};for(var i=0;i<ttq.methods.length;i++)ttq.setAndDefer(ttq,ttq.methods[i]);ttq.instance=function(t){for(var e=ttq._i[t]||[],n=0;n<ttq.methods.length;n++)ttq.setAndDefer(e,ttq.methods[n]);return e};ttq.load=function(e,n){var i="https://analytics.tiktok.com/i18n/pixel/events.js";ttq._i=ttq._i||{};ttq._i[e]=[];ttq._i[e]._u=i;ttq._t=ttq._t||{};ttq._t[e]=+new Date;ttq._o=ttq._o||{};ttq._o[e]=n||{};var o=document.createElement("script");o.type="text/javascript";o.async=!0;o.src=i+"?sdkid="+e+"&lib="+t;var a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(o,a)};ttq.load("' . esc_js( $tiktok ) . '");ttq.page();}(window,document,"ttq");';
            wp_add_inline_script( 'agenli-tiktok', $tiktok_init, 'before' );
        }

        if ( $hotjar ) {
            wp_enqueue_script(
                'agenli-hotjar',
                'https://static.hotjar.com/c/hotjar-' . rawurlencode( $hotjar ) . '.js?sv=6',
                array(),
                null, // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
                true
            );
            $hotjar_init = '(function(h,o,t,j,a,r){h.hj=h.hj||function(){(h.hj.q=h.hj.q||[]).push(arguments)};h._hjSettings={hjid:' . (int) $hotjar . ',hjsv:6};a=o.getElementsByTagName("head")[0];r=o.createElement("script");r.async=1;r.src=t+h._hjSettings.hjid+j+h._hjSettings.hjsv;a.appendChild(r);})(window,document,"https://static.hotjar.com/c/hotjar-",".js?sv=");';
            wp_add_inline_script( 'agenli-hotjar', $hotjar_init, 'before' );
        }
    }

    public static function inject_meta_tags() {
        $gsc = agenli_get_option( 'analytics_gsc_verify' );
        if ( $gsc ) {
            echo '<meta name="google-site-verification" content="' . esc_attr( $gsc ) . '">' . "\n";
        }
    }

    public static function inject_footer_tags() {
        $gtm = agenli_get_option( 'analytics_gtm_id' );
        if ( $gtm ) {
            echo '<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=' . esc_attr( $gtm ) . '" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>' . "\n";
        }
    }
}