/**
 * PHPer 官网交互脚本
 */

document.addEventListener('DOMContentLoaded', () => {
    // 初始化所有功能
    initScreenshotTabs();
    initFAQ();
    initScrollAnimations();
    initMobileMenu();
    initSmoothScroll();
});

/**
 * 截图标签切换
 */
function initScreenshotTabs() {
    const tabs = document.querySelectorAll('.tab-btn');
    const images = document.querySelectorAll('.screenshot-img');
    
    tabs.forEach(tab => {
        tab.addEventListener('click', () => {
            const target = tab.dataset.tab;
            
            // 切换标签状态
            tabs.forEach(t => t.classList.remove('active'));
            tab.classList.add('active');
            
            // 切换图片
            images.forEach(img => {
                if (img.dataset.tab === target) {
                    img.classList.add('active');
                } else {
                    img.classList.remove('active');
                }
            });
        });
    });
}

/**
 * FAQ 折叠面板
 */
function initFAQ() {
    const faqItems = document.querySelectorAll('.faq-item');
    
    faqItems.forEach(item => {
        const question = item.querySelector('.faq-question');
        
        question.addEventListener('click', () => {
            // 关闭其他展开的项目
            faqItems.forEach(other => {
                if (other !== item && other.classList.contains('active')) {
                    other.classList.remove('active');
                }
            });
            
            // 切换当前项目
            item.classList.toggle('active');
        });
    });
}

/**
 * 滚动动画
 */
function initScrollAnimations() {
    const observerOptions = {
        root: null,
        rootMargin: '0px',
        threshold: 0.1
    };
    
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                entry.target.classList.add('visible');
            }
        });
    }, observerOptions);
    
    // 观察需要动画的元素
    const animatedElements = document.querySelectorAll(
        '.feature-card, .faq-item, .table-row:not(.table-header)'
    );
    
    animatedElements.forEach((el, index) => {
        el.style.transitionDelay = `${index * 0.05}s`;
        observer.observe(el);
    });
}

/**
 * 移动端菜单
 */
function initMobileMenu() {
    const menuBtn = document.querySelector('.mobile-menu-btn');
    const navLinks = document.querySelector('.nav-links');
    
    if (!menuBtn || !navLinks) return;
    
    menuBtn.addEventListener('click', () => {
        menuBtn.classList.toggle('active');
        navLinks.classList.toggle('mobile-open');
    });
    
    // 点击链接后关闭菜单
    navLinks.querySelectorAll('a').forEach(link => {
        link.addEventListener('click', () => {
            menuBtn.classList.remove('active');
            navLinks.classList.remove('mobile-open');
        });
    });
}

/**
 * 平滑滚动
 */
function initSmoothScroll() {
    document.querySelectorAll('a[href^="#"]').forEach(anchor => {
        anchor.addEventListener('click', function(e) {
            const href = this.getAttribute('href');
            if (href === '#') return;
            
            e.preventDefault();
            const target = document.querySelector(href);
            
            if (target) {
                target.scrollIntoView({
                    behavior: 'smooth',
                    block: 'start'
                });
            }
        });
    });
}

/**
 * 导航栏滚动效果
 */
let lastScroll = 0;
const navbar = document.querySelector('.navbar');

window.addEventListener('scroll', () => {
    const currentScroll = window.pageYOffset;
    
    if (currentScroll > 100) {
        navbar.style.boxShadow = '0 4px 20px rgba(0, 0, 0, 0.3)';
    } else {
        navbar.style.boxShadow = 'none';
    }
    
    lastScroll = currentScroll;
});

/**
 * 打字机效果（终端提示）
 */
function typeWriter(element, text, speed = 50) {
    let i = 0;
    element.textContent = '';
    
    function type() {
        if (i < text.length) {
            element.textContent += text.charAt(i);
            i++;
            setTimeout(type, speed);
        }
    }
    
    type();
}

// 页面加载完成后启动打字机效果
window.addEventListener('load', () => {
    const promptText = document.querySelector('.prompt-text');
    if (promptText) {
        setTimeout(() => {
            typeWriter(promptText, '所有服务已就绪，开始开发吧！', 80);
        }, 1500);
    }
});