<?php
/**
 * Banner Title 区块模板
 * 现代化的页面标题横幅组件
 * 
 * @package Nenghui_Energy_Theme
 * @version 2.0.0
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

/**
 * 获取配置参数
 */
if (!class_exists('BannerTitleConfig')) {
class BannerTitleConfig {
    private $shortcode_atts;
    
    public function __construct() {
        global $banner_title_shortcode_atts;
        // 确保 $banner_title_shortcode_atts 是数组
        if (!isset($banner_title_shortcode_atts) || !is_array($banner_title_shortcode_atts)) {
            $banner_title_shortcode_atts = array();
        }
        $this->shortcode_atts = $banner_title_shortcode_atts;
    }
    
    /**
     * 获取标题
     */
    public function getTitle() {
        $title = !empty($this->shortcode_atts['title']) 
            ? $this->shortcode_atts['title'] 
            : get_theme_mod('banner_title_main_title', 'ABOUT US');
        
        // 根据title参数返回合适的显示文本
        switch (strtolower($title)) {
            case 'cases':
                return 'CASES';
            case 'news':
                return 'NEWS';
            case 'about':
                return 'ABOUT US';
            case 'contact':
                return 'CONTACT US';
            default:
                return strtoupper($title);
        }
    }
    
    /**
     * 获取描述
     */
    public function getDescription() {
        return !empty($this->shortcode_atts['description']) 
            ? $this->shortcode_atts['description'] 
            : get_theme_mod('banner_title_description', 'Powering Sustainable Futures with Advanced Energy Storage Solutions');
    }
    
    /**
     * 获取背景图片
     */
    public function getBackgroundImage() {
        $bg_image = !empty($this->shortcode_atts['bg_image']) 
            ? $this->shortcode_atts['bg_image'] 
            : get_theme_mod('banner_title_bg_image', '');
            
        // 如果没有设置背景图片或图片无效，使用默认图片
        if (empty($bg_image)) {
            $bg_image = get_template_directory_uri() . '/assets/images/about-bg.webp';
        } else {
            // 验证图片路径
            $is_valid_url = filter_var($bg_image, FILTER_VALIDATE_URL);
            $is_valid_file = false;
            
            // 只对本地路径进行文件存在性检查
            if (!$is_valid_url && is_string($bg_image)) {
                $file_path = str_replace(get_site_url(), ABSPATH, $bg_image);
                $is_valid_file = file_exists($file_path);
            }
            
            // 如果既不是有效URL也不是有效文件，使用默认图片
            if (!$is_valid_url && !$is_valid_file) {
                $bg_image = get_template_directory_uri() . '/assets/images/about-bg.webp';
            }
        }
        
        return $bg_image;
    }
    
    /**
     * 获取元素ID
     */
    public function getElementId() {
        return !empty($this->shortcode_atts['id']) 
            ? $this->shortcode_atts['id'] 
            : 'banner-title-' . uniqid();
    }
    
    /**
     * 获取CSS类
     */
    public function getCssClasses() {
        $classes = array('nenghui-banner-title', 'banner-title-modern');
        
        if (!empty($this->shortcode_atts['class']) && is_string($this->shortcode_atts['class'])) {
            // 清理CSS类名，移除潜在的危险字符
            $custom_class = preg_replace('/[^a-zA-Z0-9\-_\s]/', '', $this->shortcode_atts['class']);
            if (!empty($custom_class)) {
                $classes[] = $custom_class;
            }
        }
        
        // 动画类
        $show_animation = isset($this->shortcode_atts['show_animation']) 
            ? $this->shortcode_atts['show_animation'] 
            : 'true';
            
        if ($show_animation === 'true' || $show_animation === true) {
            $classes[] = 'has-animation';
        }
        
        return implode(' ', array_filter($classes));
    }
    
    /**
     * 获取高度设置
     */
    public function getHeight() {
        $height = !empty($this->shortcode_atts['height']) 
            ? $this->shortcode_atts['height'] 
            : get_theme_mod('banner_title_height', '60vh');
            
        // 验证高度值格式
        if (!preg_match('/^\d+(\.\d+)?(px|vh|vw|%|em|rem)$/', $height)) {
            $height = '70vh'; // 默认值
        }
        
        return $height;
    }
    
    /**
     * 获取遮罩透明度
     */
    public function getOverlayOpacity() {
        $opacity = !empty($this->shortcode_atts['overlay_opacity']) 
            ? $this->shortcode_atts['overlay_opacity'] 
            : get_theme_mod('banner_title_overlay_opacity', '0.4');
            
        // 验证透明度值（0-1之间的数字）
        $opacity = floatval($opacity);
        if ($opacity < 0 || $opacity > 1) {
            $opacity = 0.4; // 默认值
        }
        
        return $opacity;
    }
}
}

// 初始化配置
try {
    $config = new BannerTitleConfig();
    $element_id = $config->getElementId();
    $title = $config->getTitle();
    $description = $config->getDescription();
    $bg_image = $config->getBackgroundImage();
    $css_classes = $config->getCssClasses();
    $height = $config->getHeight();
    $overlay_opacity = $config->getOverlayOpacity();
} catch (Exception $e) {
    // 错误处理：使用默认值
    $element_id = 'banner-title-' . uniqid();
    $title = 'ABOUT US';
    $description = 'Powering Sustainable Futures with Advanced Energy Storage Solutions';
    $bg_image = get_template_directory_uri() . '/assets/images/about-bg.webp';
    $css_classes = 'nenghui-banner-title banner-title-modern';
    $height = '60vh';
    $overlay_opacity = '0.4';
    
    // 记录错误（如果错误处理器可用）
    if (function_exists('nenghui_log_foreach_error')) {
        nenghui_log_foreach_error('BannerTitleConfig initialization error: ' . $e->getMessage(), __FILE__, __LINE__);
    }
}

// 验证输出变量
$element_id = !empty($element_id) ? $element_id : 'banner-title-' . uniqid();
$title = !empty($title) ? $title : 'ABOUT US';
$description = is_string($description) ? $description : '';
$bg_image = !empty($bg_image) ? $bg_image : get_template_directory_uri() . '/assets/images/about-bg.webp';
$css_classes = !empty($css_classes) ? $css_classes : 'nenghui-banner-title banner-title-modern';
$height = !empty($height) ? $height : '60vh';
$overlay_opacity = is_numeric($overlay_opacity) ? $overlay_opacity : '0.4';

?>

<section id="<?php echo esc_attr($element_id); ?>" class="<?php echo esc_attr($css_classes); ?>" data-bg-image="<?php echo esc_url($bg_image); ?>">
    <!-- 背景容器 -->
    <div class="banner-background">
        <div class="banner-image" style="background-image: url('<?php echo esc_url($bg_image); ?>')"></div>
        <div class="banner-overlay" style="opacity: <?php echo esc_attr($overlay_opacity); ?>"></div>
    </div>
    
    <!-- 内容容器 -->
    <div class="banner-container">
        <div class="banner-content">
            <div class="banner-text" data-aos="fade-up" data-aos-delay="200">
                <h1 class="banner-title"><?php echo esc_html($title); ?></h1>
                <?php if (!empty($description)): ?>
                    <p class="banner-description"><?php echo esc_html($description); ?></p>
                <?php endif; ?>
            </div>
        </div>
    </div>
</section>
<style>
/* ===== Banner Title 现代化样式 ===== */
.nenghui-banner-title {
    position: relative;
    height: <?php echo esc_attr($height); ?>;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: #ffffff;
}

/* 背景层 */
.nenghui-banner-title .banner-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.nenghui-banner-title .banner-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: scroll;
}

.nenghui-banner-title .banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.8) 0%, rgba(52, 73, 94, 0.6) 100%);
    transition: opacity 0.3s ease;
}

/* 内容容器 */
.nenghui-banner-title .banner-container {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 1320px;
    padding: 0 20px;
}

.nenghui-banner-title .banner-content {
    text-align: left;
}

/* 文字样式 */
.nenghui-banner-title .banner-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin: 0 0 1.5rem 0;
    letter-spacing: 3px;
    color: #ffffff;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
}

.nenghui-banner-title .banner-description {
    font-size: clamp(1rem, 2vw, 1.3rem);
    line-height: 1.6;
    margin: 0;
    color: #ffffff;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
    font-weight: 300;
    max-width: 1320px;
}
/* 动画效果 */
.nenghui-banner-title.has-animation {
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s ease-out;
}

.nenghui-banner-title.has-animation.animated {
    opacity: 1;
    transform: translateY(0);
}

.nenghui-banner-title.has-animation .banner-title {
    animation: fadeInUp 1.2s ease-out 0.3s both;
}

.nenghui-banner-title.has-animation .banner-description {
    animation: fadeInUp 1.2s ease-out 0.6s both;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nenghui-banner-title {
        height: 50vh;
        min-height: 350px;
    }
    
    .nenghui-banner-title .banner-title {
        letter-spacing: 2px;
    }

    .nenghui-cases-section .container {
        width: 100% !important;
    }
}

@media (max-width: 480px) {
    .nenghui-banner-title {
        height: 40vh;
        min-height: 300px;
    }
    
    .nenghui-banner-title .banner-container {
        padding: 0 15px;
        margin-top: 10rem;
    }
    
    .nenghui-banner-title .banner-title {
        letter-spacing: 1px;
    }
}

/* 动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* 图片加载失败时的备用样式 */
.nenghui-banner-title.no-image .banner-image {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .nenghui-banner-title .banner-overlay {
        opacity: 0.8;
    }
    
    .nenghui-banner-title .banner-title {
        text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.8);
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    .nenghui-banner-title .banner-image,
    .nenghui-banner-title .banner-overlay,
    .nenghui-banner-title.has-animation,
    .nenghui-banner-title .banner-title,
    .nenghui-banner-title .banner-description {
        animation: none;
        transition: none;
    }
}
</style>

<script>
(function() {
    'use strict';
    
    // 检查基本环境
    if (typeof document === 'undefined' || typeof window === 'undefined') {
        return;
    }
    
    // 获取元素
    const elementId = '<?php echo esc_js($element_id); ?>';
    if (!elementId) {
        console.warn('Banner element ID is missing');
        return;
    }
    
    const bannerElement = document.getElementById(elementId);
    if (!bannerElement) {
        console.warn('Banner element not found:', elementId);
        return;
    }
    
    const bgImage = '<?php echo esc_js($bg_image); ?>';
    
    /**
     * 图片预加载和错误处理
     */
    function handleImageLoading() {
        if (!bgImage || typeof Image === 'undefined') {
            bannerElement.classList.add('no-image');
            return;
        }
        
        try {
            const img = new Image();
            
            img.onload = function() {
                if (bannerElement) {
                    bannerElement.classList.remove('no-image');
                }
            };
            
            img.onerror = function() {
                if (bannerElement) {
                    bannerElement.classList.add('no-image');
                }
                console.warn('Banner background image failed to load:', bgImage);
            };
            
            img.src = bgImage;
        } catch (error) {
            console.warn('Error in image loading:', error);
            bannerElement.classList.add('no-image');
        }
    }
    
    /**
     * 滚动动画处理
     */
    function handleScrollAnimation() {
        if (!bannerElement.classList.contains('has-animation')) return;
        
        // 检查 IntersectionObserver 兼容性
        if (!window.IntersectionObserver) {
            // 降级处理：直接添加动画类
            bannerElement.classList.add('animated');
            return;
        }
        
        const observer = new IntersectionObserver(
            function(entries) {
                entries.forEach(function(entry) {
                    if (entry.isIntersecting) {
                        entry.target.classList.add('animated');
                        observer.unobserve(entry.target);
                    }
                });
            },
            {
                threshold: 0.1,
                rootMargin: '0px 0px -50px 0px'
            }
        );
        
        observer.observe(bannerElement);
    }
    

    // 初始化函数
    function initBanner() {
        handleImageLoading();
        handleScrollAnimation();
    }
    
    // DOM 加载完成后初始化
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', initBanner);
    } else {
        // DOM 已经加载完成，直接初始化
        initBanner();
    }
})();
</script>