/**
 * 投资者接待区块 JavaScript
 * 处理基本的初始化和动画效果
 */

(function($) {
    'use strict';

    // 投资者接待管理器
    window.investorReceptionManager = {
        
        // 初始化
        init: function() {
            this.bindEvents();
            this.initializeBlocks();
        },

        // 绑定事件
        bindEvents: function() {
            $(document).ready(() => {
                this.setupResponsiveHandling();
            });
        },

        // 初始化所有投资者接待区块
        initializeBlocks: function() {
            $('.investor-reception-block').each(function() {
                const $block = $(this);
                
                // 添加加载完成类
                $block.addClass('loaded');
                
                // 初始化图片懒加载
                investorReceptionManager.initLazyLoading($block);
                
                // 添加动画效果
                investorReceptionManager.addAnimations($block);
            });
        },

        // 设置响应式处理
        setupResponsiveHandling: function() {
            let resizeTimer;
            
            $(window).on('resize', () => {
                clearTimeout(resizeTimer);
                resizeTimer = setTimeout(() => {
                    this.handleResize();
                }, 250);
            });
        },

        // 处理窗口大小变化
        handleResize: function() {
            $('.investor-reception-block').each(function() {
                const $block = $(this);
                investorReceptionManager.adjustLayout($block);
            });
        },

        // 调整布局
        adjustLayout: function($block) {
            const windowWidth = $(window).width();
            
            if (windowWidth <= 768) {
                $block.addClass('mobile-layout');
            } else {
                $block.removeClass('mobile-layout');
            }
        },

        // 初始化懒加载
        initLazyLoading: function($block) {
            const $image = $block.find('.reception-image');
            
            if ($image.length && 'IntersectionObserver' in window) {
                const observer = new IntersectionObserver((entries) => {
                    entries.forEach(entry => {
                        if (entry.isIntersecting) {
                            const $target = $(entry.target);
                            $target.addClass('loaded');
                            observer.unobserve(entry.target);
                        }
                    });
                });
                
                observer.observe($image[0]);
            }
        },

        // 添加动画效果
        addAnimations: function($block) {
            // 检查是否支持 Intersection Observer
            if ('IntersectionObserver' in window) {
                const observer = new IntersectionObserver((entries) => {
                    entries.forEach(entry => {
                        if (entry.isIntersecting) {
                            const $target = $(entry.target);
                            $target.addClass('animate-in');
                            
                            // 延迟显示子元素
                            setTimeout(() => {
                                $target.find('.title-section').addClass('animate-in');
                            }, 200);
                            
                            setTimeout(() => {
                                $target.find('.contact-section').addClass('animate-in');
                            }, 400);
                            
                            observer.unobserve(entry.target);
                        }
                    });
                }, {
                    threshold: 0.2
                });
                
                observer.observe($block[0]);
            } else {
                // 降级处理：直接添加动画类
                $block.addClass('animate-in');
                $block.find('.title-section, .contact-section').addClass('animate-in');
            }
        }
    };

    // 初始化
    investorReceptionManager.init();

})(jQuery);