<?php
/**
 * AdSense Placement & Google Analytics - Helper Functions
 *
 * Funciones para usar en templates:
 * - roi_render_ad_slot('post-top')
 * - roi_render_rail_ads() - Para los margenes laterales del viewport
 *
 * Funciones auto-registradas en wp_head:
 * - roi_enqueue_adsense_script() - Script principal de AdSense
 * - roi_enqueue_analytics_script() - Script de Google Analytics
 */

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

/**
 * Renderiza un slot de anuncio en una ubicacion
 *
 * NOTA DIP: El renderer se obtiene del DIContainer, NO se instancia directamente.
 * Esto cumple con el Principio de Inversion de Dependencias.
 */
function roi_render_ad_slot(string $location): string
{
    global $container;

    if ($container === null) {
        return '';
    }

    try {
        $repository = $container->getComponentSettingsRepository();
        $settings = $repository->getComponentSettings('adsense-placement');

        if (empty($settings)) {
            return '';
        }

        // Verificar exclusiones
        if (roi_is_ad_excluded($settings)) {
            return '';
        }

        // Obtener renderer desde DIContainer (DIP compliant)
        $renderer = $container->getAdsensePlacementRenderer();

        return $renderer->renderSlot($settings, $location);

    } catch (\Throwable $e) {
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log('ROI AdSense: ' . $e->getMessage());
        }
        return '';
    }
}

/**
 * Verifica si el contenido actual esta excluido
 */
function roi_is_ad_excluded(array $settings): bool
{
    $forms = $settings['forms'] ?? [];

    // Excluir categorias
    $excludeCats = array_filter(array_map('trim', explode(',', $forms['exclude_categories'] ?? '')));
    if (!empty($excludeCats) && is_single()) {
        $postCats = wp_get_post_categories(get_the_ID());
        if (array_intersect($excludeCats, $postCats)) {
            return true;
        }
    }

    // Excluir tipos de post
    $excludeTypes = array_filter(array_map('trim', explode(',', $forms['exclude_post_types'] ?? '')));
    if (!empty($excludeTypes) && in_array(get_post_type(), $excludeTypes, true)) {
        return true;
    }

    // Excluir posts especificos
    $excludeIds = array_filter(array_map('trim', explode(',', $forms['exclude_post_ids'] ?? '')));
    if (!empty($excludeIds) && in_array((string)get_the_ID(), $excludeIds, true)) {
        return true;
    }

    return false;
}

/**
 * Renderiza los Rail Ads (margenes laterales del viewport)
 * Se llama desde wp_footer para inyectar al final del body
 *
 * NOTA DIP: El renderer se obtiene del DIContainer, NO se instancia directamente.
 */
function roi_render_rail_ads(): string
{
    global $container;

    if ($container === null) {
        return '';
    }

    try {
        $repository = $container->getComponentSettingsRepository();
        $settings = $repository->getComponentSettings('adsense-placement');

        if (empty($settings)) {
            return '';
        }

        // Verificar exclusiones
        if (roi_is_ad_excluded($settings)) {
            return '';
        }

        // Obtener renderer desde DIContainer (DIP compliant)
        $renderer = $container->getAdsensePlacementRenderer();

        return $renderer->renderRailAds($settings);

    } catch (\Throwable $e) {
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log('ROI AdSense Rail Ads: ' . $e->getMessage());
        }
        return '';
    }
}

/**
 * Hook para inyectar Rail Ads en el footer
 */
add_action('wp_footer', function() {
    // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
    echo roi_render_rail_ads();
}, 50);

/**
 * Carga el script principal de AdSense
 */
function roi_enqueue_adsense_script(): void
{
    global $container;

    if ($container === null || is_admin()) {
        return;
    }

    try {
        $repository = $container->getComponentSettingsRepository();
        $settings = $repository->getComponentSettings('adsense-placement');

        if (!($settings['visibility']['is_enabled'] ?? false)) {
            return;
        }

        $publisherId = $settings['content']['publisher_id'] ?? '';
        if (empty($publisherId)) {
            return;
        }

        $delayEnabled = ($settings['forms']['delay_enabled'] ?? true) === true;

        if ($delayEnabled) {
            echo '<script type="text/plain" data-adsense-script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=' . esc_attr($publisherId) . '" crossorigin="anonymous"></script>' . "\n";
        } else {
            echo '<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=' . esc_attr($publisherId) . '" crossorigin="anonymous"></script>' . "\n";
        }

    } catch (\Throwable $e) {
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log('ROI AdSense: ' . $e->getMessage());
        }
    }
}
add_action('wp_head', 'roi_enqueue_adsense_script', 5);

/**
 * Registra el filtro the_content para inyectar anuncios
 */
// Prioridad 150 para ejecutar DESPUÉS de restrict-content-pro (100)
add_filter('the_content', 'roi_inject_content_ads', 150);

function roi_inject_content_ads(string $content): string
{
    global $container;

    // DEBUG: Log para diagnosticar problema de ads no inyectados
    $post_id = get_the_ID();
    $post_url = get_permalink();
    error_log('ROI AdSense Debug: roi_inject_content_ads called for post_id=' . $post_id . ', url=' . $post_url);

    // Solo en posts individuales
    if (!is_single() || !in_the_loop() || !is_main_query()) {
        error_log('ROI AdSense Debug: Skip - not single/loop/main_query. is_single=' . (is_single() ? '1' : '0') . ', in_the_loop=' . (in_the_loop() ? '1' : '0') . ', is_main_query=' . (is_main_query() ? '1' : '0'));
        return $content;
    }

    if ($container === null) {
        error_log('ROI AdSense Debug: Skip - container is null');
        return $content;
    }

    try {
        $repository = $container->getComponentSettingsRepository();
        $settings = $repository->getComponentSettings('adsense-placement');

        error_log('ROI AdSense Debug: Settings loaded. is_enabled=' . ($settings['visibility']['is_enabled'] ?? 'NOT SET'));

        if (empty($settings) || !($settings['visibility']['is_enabled'] ?? false)) {
            error_log('ROI AdSense Debug: Skip - settings empty or not enabled');
            return $content;
        }

        // Verificar exclusiones
        if (roi_is_ad_excluded($settings)) {
            error_log('ROI AdSense Debug: Skip - post excluded');
            return $content;
        }

        $renderer = $container->getAdsensePlacementRenderer();

        // Inyectar anuncio al inicio (post-top)
        $postTopHtml = '';
        if ($settings['behavior']['post_top_enabled'] ?? false) {
            $postTopHtml = $renderer->renderSlot($settings, 'post-top');
            error_log('ROI AdSense Debug: post-top rendered, length=' . strlen($postTopHtml));
        }

        // Inyectar anuncio al final (post-bottom)
        $postBottomHtml = '';
        if ($settings['behavior']['post_bottom_enabled'] ?? false) {
            $postBottomHtml = $renderer->renderSlot($settings, 'post-bottom');
            error_log('ROI AdSense Debug: post-bottom rendered, length=' . strlen($postBottomHtml));
        }

        // Inyectar anuncios dentro del contenido
        $injector = new \ROITheme\Public\AdsensePlacement\Infrastructure\Services\ContentAdInjector(
            $settings,
            $renderer
        );
        $content = $injector->inject($content);

        // DEBUG: Agregar marcador visible para rastrear si el contenido se pierde después del filtro
        $debugMarker = '<!-- ROI-ADSENSE-DEBUG-MARKER -->';
        $finalContent = $debugMarker . $postTopHtml . $content . $postBottomHtml . $debugMarker;
        error_log('ROI AdSense Debug: Final injection done. postTop=' . strlen($postTopHtml) . ', postBottom=' . strlen($postBottomHtml) . ', finalLength=' . strlen($finalContent));
        error_log('ROI AdSense Debug: First 200 chars of postTopHtml: ' . substr($postTopHtml, 0, 200));

        return $finalContent;

    } catch (\Throwable $e) {
        error_log('ROI AdSense Content ERROR: ' . $e->getMessage() . ' in ' . $e->getFile() . ':' . $e->getLine());
        return $content;
    }
}

/**
 * Carga el script de Google Analytics (GA4 o Universal Analytics)
 */
function roi_enqueue_analytics_script(): void
{
    global $container;

    if ($container === null || is_admin()) {
        return;
    }

    try {
        $repository = $container->getComponentSettingsRepository();
        $settings = $repository->getComponentSettings('adsense-placement');

        // Verificar si Analytics esta habilitado
        if (!($settings['analytics']['analytics_enabled'] ?? false)) {
            return;
        }

        $trackingId = trim($settings['analytics']['ga_tracking_id'] ?? '');
        if (empty($trackingId)) {
            return;
        }

        // Verificar si GA ya esta cargado por otro plugin
        if (roi_is_analytics_loaded()) {
            return;
        }

        $anonymizeIp = ($settings['analytics']['ga_anonymize_ip'] ?? true) === true;

        // Detectar tipo de ID (GA4 vs Universal Analytics)
        if (strpos($trackingId, 'G-') === 0) {
            roi_render_ga4_script($trackingId, $anonymizeIp);
        } elseif (strpos($trackingId, 'UA-') === 0) {
            roi_render_universal_analytics_script($trackingId, $anonymizeIp);
        }

    } catch (\Throwable $e) {
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log('ROI Analytics: ' . $e->getMessage());
        }
    }
}
add_action('wp_head', 'roi_enqueue_analytics_script', 1);

/**
 * Verifica si Google Analytics ya esta cargado por otro plugin
 */
function roi_is_analytics_loaded(): bool
{
    // Verificar si MonsterInsights esta activo
    if (class_exists('MonsterInsights_Lite') || class_exists('MonsterInsights')) {
        return true;
    }

    // Verificar si Site Kit de Google esta activo
    if (class_exists('Google\Site_Kit\Plugin')) {
        return true;
    }

    return false;
}

/**
 * Renderiza script de Google Analytics 4
 */
function roi_render_ga4_script(string $trackingId, bool $anonymizeIp): void
{
    $config = $anonymizeIp ? "{ 'anonymize_ip': true }" : '{}';

    echo '<!-- Google Analytics 4 (ROI Theme) -->' . "\n";
    echo '<script async src="https://www.googletagmanager.com/gtag/js?id=' . esc_attr($trackingId) . '"></script>' . "\n";
    echo '<script>' . "\n";
    echo 'window.dataLayer = window.dataLayer || [];' . "\n";
    echo 'function gtag(){dataLayer.push(arguments);}' . "\n";
    echo 'gtag("js", new Date());' . "\n";
    echo 'gtag("config", "' . esc_js($trackingId) . '", ' . $config . ');' . "\n";
    echo '</script>' . "\n";
}

/**
 * Renderiza script de Universal Analytics (legacy)
 */
function roi_render_universal_analytics_script(string $trackingId, bool $anonymizeIp): void
{
    $anonymizeConfig = $anonymizeIp ? 'ga("set", "anonymizeIp", true);' : '';

    echo '<!-- Universal Analytics (ROI Theme) -->' . "\n";
    echo '<script>' . "\n";
    echo '(function(i,s,o,g,r,a,m){i["GoogleAnalyticsObject"]=r;i[r]=i[r]||function(){' . "\n";
    echo '(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),' . "\n";
    echo 'm=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)' . "\n";
    echo '})(window,document,"script","https://www.google-analytics.com/analytics.js","ga");' . "\n";
    echo 'ga("create", "' . esc_js($trackingId) . '", "auto");' . "\n";
    if (!empty($anonymizeConfig)) {
        echo $anonymizeConfig . "\n";
    }
    echo 'ga("send", "pageview");' . "\n";
    echo '</script>' . "\n";
}