---
import { getCollection, render } from 'astro:content';
import { contentStructure, getRelativePath, getBasename, getDirPath, getSpecialPath } from '@/content.config';
import type { SectionStructure } from '@/content.config';
import Layout from '@/components/Layout.astro';
import Breadcrumb from '@/components/Breadcrumb.astro';

// 添加这一行，告诉Astro预渲染这个页面
export const prerender = true;

export async function getStaticPaths() {
  const articles = await getCollection('articles');
  const views = ['grid', 'timeline'];
  
  // 为每篇文章添加section信息
  const articlesWithSections = articles.map(article => {
    // 查找文章所属的目录
    let section = '';
    const findSection = (sections: SectionStructure[], articleId: string, parentPath = ''): string | null => {
      for (const sec of sections) {
        const sectionPath = parentPath ? `${parentPath}/${sec.name}` : sec.name;
        
        // 检查文章是否在当前目录中
        for (const artPath of sec.articles) {
          const artId = getRelativePath(artPath);
          const basename = getBasename(artPath);
          const dirPath = getDirPath(artPath);
          
          // 尝试多种可能的ID格式
          const possibleIds = [
            artId,                  // 完整相对路径
            `${sectionPath}/${basename}`, // 目录路径/文件名
            basename,               // 仅文件名
            dirPath ? `${dirPath}/${basename}` : basename, // 目录路径/文件名
            `articles/${artId}`,    // 添加集合名称前缀
            `articles/${sectionPath}/${basename}` // 添加集合名称前缀和目录路径
          ];
          
          // 精确匹配（不区分大小写）
          if (possibleIds.some(id => id.toLowerCase() === articleId.toLowerCase())) {
            return sectionPath;
          }
          
          // 检查文章ID是否以某个可能的ID结尾（不区分大小写）
          for (const possibleId of possibleIds) {
            if (articleId.toLowerCase().endsWith(possibleId.toLowerCase())) {
              return sectionPath;
            }
          }
        }
        
        // 递归检查子目录
        const foundInSubsection = findSection(sec.sections, articleId, sectionPath);
        if (foundInSubsection) {
          return foundInSubsection;
        }
      }
      
      return null;
    };
    
    section = findSection(contentStructure.sections, article.id) || '';
    
    return {
      ...article,
      section
    };
  });
  
  // 为每篇文章生成路由参数
  const paths = [];
  for (const article of articlesWithSections) {
    // 检查文章ID是否需要特殊处理
    const specialId = getSpecialPath(article.id);
    
    // 添加基本路由
    paths.push({
      params: { id: specialId },
      props: { 
        article, 
        section: article.section,
        originalId: specialId !== article.id ? article.id : undefined,
        view: undefined
      }
    });
    
    // 为每个视图添加路由
    for (const view of views) {
      paths.push({
        params: { id: `${specialId}/${view}` },
        props: { 
          article, 
          section: article.section,
          originalId: specialId !== article.id ? article.id : undefined,
          view
        }
      });
    }
  }
  
  return paths;
}

// 获取文章内容
const { article, section, originalId, view } = Astro.props;

// 如果有原始ID，使用它来渲染内容
const articleToRender = originalId ? { ...article, id: originalId } : article;

// 渲染文章内容
const { Content } = await render(articleToRender);

// 获取面包屑导航
const breadcrumbs = section ? section.split('/') : [];

// 获取相关文章
const allArticles = await getCollection('articles');
const relatedArticles = allArticles
  .filter(a => a.id !== article.id && (
    (a.data.tags && article.data.tags && a.data.tags.some(tag => article.data.tags?.includes(tag)))
  ))
  .sort((a, b) => b.data.date.getTime() - a.data.date.getTime())
  .slice(0, 3);

// 准备文章描述
const description = article.data.summary || `${article.data.title} - 发布于 ${article.data.date.toLocaleDateString('zh-CN')}`;

// 处理特殊ID的函数
function getArticleUrl(articleId: string) {
  return `/articles/${getSpecialPath(articleId)}${view ? `/${view}` : ''}`;
}
---

<Layout
  title={article.data.title}
  description={description}
  date={article.data.date}
  author={article.data.author}
  tags={article.data.tags}
  image={article.data.image}
>
  <div class="max-w-5xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
    <!-- 阅读进度条 -->
    <div class="fixed top-0 left-0 w-full h-1 bg-transparent z-50" id="progress-container                                                                                                                 9">
       <div class="h-full w-0 bg-primary-500 transition-width duration-100" id="progress-bar"></div>
    </div>
    
    <!-- 文章头部 -->
    <header class="mb-8">
      <!-- 导航区域 -->
      <div class="bg-white dark:bg-dark-card rounded-xl p-4 mb-6 shadow-lg border border-gray-200 dark:border-gray-700">
        <div class="flex items-center justify-between">
          <Breadcrumb 
            pageType="article" 
            pathSegments={breadcrumbs} 
            articleTitle={article.data.title} 
          />
          
          <div class="flex items-center gap-3">
            {/* 返回按钮 */}
            <a href={`/articles${view ? `/${view}` : ''}`} class="text-secondary-500 dark:text-secondary-400 hover:text-primary-600 dark:hover:text-primary-400 transition-colors flex items-center text-sm">
              <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 mr-1" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 19l-7-7m0 0l7-7m-7 7h18" />
              </svg>
              返回文章列表
            </a>
          </div>
        </div>
      </div>
      
      <h1 class="text-3xl font-bold mb-4 text-gray-900 dark:text-gray-100">{article.data.title}</h1>
      
      <div class="flex flex-wrap items-center gap-4 text-sm text-secondary-600 dark:text-secondary-400 mb-4">
        <time datetime={article.data.date.toISOString()} class="flex items-center">
          <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 mr-1" fill="none" viewBox="0 0 24 24" stroke="currentColor">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z" />
          </svg>
          {article.data.date.toLocaleDateString('zh-CN')}
        </time>
        
        {/* 显示文章所在目录 */}
        {section && (
          <span class="flex items-center">
            <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 mr-1" fill="none" viewBox="0 0 24 24" stroke="currentColor">
              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" />
            </svg>
            <a href={`/articles?path=${encodeURIComponent(section)}`} class="hover:text-indigo-600 transition-colors">
              {section}
            </a>
          </span>
        )}
      </div>
      
      {article.data.tags && article.data.tags.length > 0 && (
        <div class="flex flex-wrap gap-2 mb-6">
          {article.data.tags.map(tag => (
            <a href={`/articles?tag=${tag}`} class="text-xs bg-primary-50 dark:bg-primary-900/30 text-primary-600 dark:text-primary-400 py-1 px-2 rounded hover:bg-primary-100 dark:hover:bg-primary-800/30 transition-colors">
              #{tag}
            </a>
          ))}
        </div>
      )}
    </header>
    
    <!-- 文章内容区域 -->
    <div class="relative">
      <!-- 文章内容 -->
      <article class="prose prose-lg dark:prose-invert prose-primary prose-table:rounded-lg prose-table:border-separate prose-table:border-2 prose-thead:bg-primary-50 dark:prose-thead:bg-dark-surface prose-ul:list-disc prose-ol:list-decimal prose-li:my-1 prose-blockquote:border-l-4 prose-blockquote:border-primary-500 prose-blockquote:bg-gray-100 prose-blockquote:dark:bg-dark-surface prose-a:text-primary-600 prose-a:dark:text-primary-400 prose-a:no-underline prose-a:border-b prose-a:border-primary-300 prose-a:hover:border-primary-600 max-w-none mb-12">
        <Content />
      </article>
      
      <!-- 固定目录面板 - 脱离文档流 -->
      <div class="hidden 2xl:block fixed right-[calc(50%-48rem)] top-20 w-64 z-30">
        <div class="bg-white dark:bg-dark-card rounded-lg shadow-lg p-4 max-h-[calc(100vh-8rem)] overflow-y-auto border border-gray-200 dark:border-gray-700">
          <div class="border-b border-secondary-100 dark:border-dark-border pb-2 mb-3 sticky top-0 bg-white dark:bg-dark-card">
            <h3 class="font-bold text-primary-700 dark:text-primary-400">文章目录</h3>
          </div>
          <div id="toc-content" class="text-sm">
            <!-- 目录内容将通过JavaScript动态生成 -->
          </div>
        </div>
      </div>
    </div>
    
    <!-- 相关文章 -->
    {relatedArticles.length > 0 && (
      <div class="mt-12 pt-8 border-t border-secondary-200 dark:border-dark-border">
        <h2 class="text-2xl font-bold mb-6 text-primary-900 dark:text-primary-100">相关文章</h2>
        <div class="grid grid-cols-1 md:grid-cols-3 gap-6">
          {relatedArticles.map(relatedArticle => (
            <a href={getArticleUrl(relatedArticle.id)} class="block p-5 border border-gray-200 dark:border-gray-700 rounded-lg bg-white dark:bg-dark-card hover:shadow-xl hover:-translate-y-1 transition-all duration-300 shadow-lg">
              <h3 class="font-bold text-lg mb-2 line-clamp-2 text-gray-800 dark:text-gray-200 hover:text-primary-700 dark:hover:text-primary-400">{relatedArticle.data.title}</h3>
              <p class="text-sm text-secondary-600 dark:text-secondary-400 mb-2">{relatedArticle.data.date.toLocaleDateString('zh-CN')}</p>
              {relatedArticle.data.summary && (
                <p class="text-sm text-secondary-700 dark:text-secondary-300 line-clamp-3">{relatedArticle.data.summary}</p>
              )}
            </a>
          ))}
        </div>
      </div>
    )}
    
    <!-- 返回顶部按钮 -->
    <button id="back-to-top" class="fixed bottom-8 right-8 w-12 h-12 rounded-full bg-primary-500 dark:bg-primary-600 text-white shadow-md flex items-center justify-center opacity-0 invisible translate-y-5 transition-all duration-300 hover:bg-primary-600 dark:hover:bg-primary-700">
      <svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 10l7-7m0 0l7 7m-7-7v18" />
      </svg>
    </button>
  </div>
</Layout>

<script>
  // 阅读进度条
  const progressBar = document.getElementById('progress-bar');
  const backToTopButton = document.getElementById('back-to-top');
  
  function updateReadingProgress() {
    const scrollTop = window.scrollY || document.documentElement.scrollTop;
    const scrollHeight = document.documentElement.scrollHeight - document.documentElement.clientHeight;
    const progress = (scrollTop / scrollHeight) * 100;
    
    if (progressBar) {
      progressBar.style.width = `${progress}%`;
    }
    
    // 显示/隐藏返回顶部按钮
    if (backToTopButton) {
      if (scrollTop > 300) {
        backToTopButton.classList.add('opacity-100', 'visible', 'translate-y-0');
        backToTopButton.classList.remove('opacity-0', 'invisible', 'translate-y-5');
      } else {
        backToTopButton.classList.add('opacity-0', 'invisible', 'translate-y-5');
        backToTopButton.classList.remove('opacity-100', 'visible', 'translate-y-0');
      }
    }
  }
  
  // 返回顶部功能
  if (backToTopButton) {
    backToTopButton.addEventListener('click', () => {
      window.scrollTo({
        top: 0,
        behavior: 'smooth'
      });
    });
  }
  
  // 监听滚动事件
  window.addEventListener('scroll', updateReadingProgress);
  
  // 初始化
  updateReadingProgress();
  
  // 目录功能
  document.addEventListener('DOMContentLoaded', () => {
    const tocContent = document.getElementById('toc-content');
    const tocPanel = document.querySelector('[class*="2xl:block"][class*="fixed"]');
    
    // 检查是否有足够空间显示目录
    function checkTocVisibility() {
      if (!tocPanel) return;
      
      // 如果窗口宽度小于1536px (2xl breakpoint)，隐藏目录
      if (window.innerWidth < 1536) {
        tocPanel.classList.add('hidden');
        tocPanel.classList.remove('2xl:block');
      } else {
        tocPanel.classList.remove('hidden');
        tocPanel.classList.add('2xl:block');
      }
    }
    
    // 监听窗口大小变化
    window.addEventListener('resize', checkTocVisibility);
    
    // 初始检查
    checkTocVisibility();
    
    // 生成目录内容
    function generateTableOfContents() {
      // 获取文章中的所有标题元素
      const article = document.querySelector('article');
      if (!article || !tocContent) {
        console.error('找不到文章内容或目录容器');
        if (tocContent) {
          tocContent.innerHTML = '<p class="text-secondary-500 dark:text-secondary-400 italic">无法生成目录</p>';
        }
        return;
      }
      
      const headings = article.querySelectorAll('h1, h2, h3, h4, h5, h6');
      if (headings.length === 0) {
        tocContent.innerHTML = '<p class="text-secondary-500 dark:text-secondary-400 italic">此文章没有目录</p>';
        return;
      }
      
      // 创建目录列表
      const tocList = document.createElement('ul');
      tocList.className = 'space-y-2';
      
      // 为每个标题创建目录项
      headings.forEach((heading, index) => {
        // 为每个标题添加ID，如果没有的话
        if (!heading.id) {
          heading.id = `heading-${index}`;
        }
        
        // 创建目录项
        const listItem = document.createElement('li');
        
        // 根据标题级别设置缩进
        const headingLevel = parseInt(heading.tagName.substring(1));
        const indent = (headingLevel - 1) * 0.75; // 每级缩进0.75rem
        
        // 创建链接
        const link = document.createElement('a');
        link.href = `#${heading.id}`;
        link.className = `block hover:text-primary-600 dark:hover:text-primary-400 transition-colors duration-50 ${headingLevel > 2 ? 'text-secondary-600 dark:text-secondary-400' : 'text-secondary-800 dark:text-secondary-200 font-medium'}`;
        link.style.paddingLeft = `${indent}rem`;
        link.textContent = heading.textContent;
        
        // 点击链接时滚动到目标位置
        link.addEventListener('click', (e) => {
          // 平滑滚动到目标位置
          e.preventDefault();
          const targetId = link.getAttribute('href')?.substring(1);
          if (!targetId) return;
          
          const targetElement = document.getElementById(targetId);
          
          if (targetElement) {
            // 滚动到目标位置，并添加一些偏移以避免被固定导航遮挡
            const offset = 100; // 可以根据需要调整
            const targetPosition = targetElement.getBoundingClientRect().top + window.scrollY - offset;
            
            window.scrollTo({
              top: targetPosition,
              behavior: 'smooth'
            });
            
            // 高亮目标标题
            targetElement.classList.add('bg-primary-50', 'dark:bg-primary-900/20');
            setTimeout(() => {
              targetElement.classList.remove('bg-primary-50', 'dark:bg-primary-900/20');
            }, 2000);
          }
        });
        
        listItem.appendChild(link);
        tocList.appendChild(listItem);
      });
      
      // 将目录添加到面板
      tocContent.innerHTML = '';
      tocContent.appendChild(tocList);
    }
    
    // 页面加载时生成目录
    try {
      generateTableOfContents();
      
      // 添加滚动监听，更新目录高亮
      function updateActiveHeading() {
        const article = document.querySelector('article');
        if (!article || !tocContent) return;
        
        const headings = Array.from(article.querySelectorAll('h1, h2, h3, h4, h5, h6'));
        if (headings.length === 0) return;
        
        // 获取所有目录链接
        const tocLinks = Array.from(tocContent.querySelectorAll('a'));
        if (tocLinks.length === 0) return;
        
        // 移除所有活跃状态
        tocLinks.forEach(link => {
          link.classList.remove('text-primary-600', 'dark:text-primary-400', 'font-medium');
        });
        
        // 找到当前视口中最靠近顶部的标题
        let currentHeading = null;
        const scrollPosition = window.scrollY + 150; // 添加一些偏移量
        
        for (const heading of headings) {
          const headingTop = heading.getBoundingClientRect().top + window.scrollY;
          if (headingTop <= scrollPosition) {
            currentHeading = heading;
          } else {
            break;
          }
        }
        
        // 如果找到当前标题，高亮对应的目录项
        if (currentHeading) {
          const activeLink = tocLinks.find(link => link.getAttribute('href') === `#${currentHeading.id}`);
          if (activeLink) {
            activeLink.classList.add('text-primary-600', 'dark:text-primary-400', 'font-medium');
          }
        }
      }
      
      // 监听滚动事件，使用节流函数优化性能
      let ticking = false;
      window.addEventListener('scroll', () => {
        if (!ticking) {
          window.requestAnimationFrame(() => {
            updateActiveHeading();
            ticking = false;
          });
          ticking = true;
        }
      });
      
      // 初始化高亮
      updateActiveHeading();
      
    } catch (error) {
      console.error('生成目录时发生错误:', error);
      if (tocContent) {
        tocContent.innerHTML = '<p class="text-secondary-500 dark:text-secondary-400 italic">生成目录时发生错误</p>';
      }
    }
  });
  
  // 代码块增强功能
  document.addEventListener('DOMContentLoaded', () => {
    // 处理所有代码块
    const codeBlocks = document.querySelectorAll('pre');
    
    codeBlocks.forEach(pre => {
      // 获取代码语言
      const code = pre.querySelector('code');
      if (!code) return;
      
      // 从类名中提取语言
      const className = code.className;
      const languageMatch = className.match(/language-(\w+)/);
      const language = languageMatch ? languageMatch[1] : 'text';
      
      // 创建顶部栏
      const header = document.createElement('div');
      header.className = 'code-header flex justify-between items-center text-xs px-4 py-2 bg-secondary-800 dark:bg-dark-card text-secondary-300 dark:text-secondary-400 rounded-t-lg';
      
      // 创建语言标签
      const languageLabel = document.createElement('span');
      languageLabel.className = 'code-language font-mono';
      languageLabel.textContent = language;
      
      // 创建复制按钮
      const copyButton = document.createElement('button');
      copyButton.className = 'code-copy-button flex items-center gap-1 hover:text-white dark:hover:text-primary-400 transition-colors';
      
      // 创建SVG图标和文本
      const copyIcon = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="w-4 h-4"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path></svg>`;
      const successIcon = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="w-4 h-4"><path d="M20 6L9 17l-5-5"></path></svg>`;
      const errorIcon = `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="w-4 h-4"><circle cx="12" cy="12" r="10"></circle><line x1="15" y1="9" x2="9" y2="15"></line><line x1="9" y1="9" x2="15" y2="15"></line></svg>`;
      
      copyButton.innerHTML = `${copyIcon}<span>复制</span>`;
      copyButton.setAttribute('aria-label', '复制代码');
      copyButton.setAttribute('title', '复制代码到剪贴板');
      
      // 添加复制功能
      copyButton.addEventListener('click', (e) => {
        e.stopPropagation();
        
        // 获取代码文本
        const codeText = code.textContent || '';
        
        // 复制到剪贴板
        navigator.clipboard.writeText(codeText)
          .then(() => {
            // 复制成功，更改按钮文本
            copyButton.innerHTML = `${successIcon}<span>已复制</span>`;
            copyButton.classList.add('text-green-400');
            
            // 2秒后恢复按钮文本
            setTimeout(() => {
              copyButton.innerHTML = `${copyIcon}<span>复制</span>`;
              copyButton.classList.remove('text-green-400');
            }, 2000);
          })
          .catch(() => {
            // 复制失败，更改按钮文本
            copyButton.innerHTML = `${errorIcon}<span>失败</span>`;
            copyButton.classList.add('text-red-400');
            
            // 2秒后恢复按钮文本
            setTimeout(() => {
              copyButton.innerHTML = `${copyIcon}<span>复制</span>`;
              copyButton.classList.remove('text-red-400');
            }, 2000);
          });
      });
      
      // 将语言标签和复制按钮添加到顶部栏
      header.appendChild(languageLabel);
      header.appendChild(copyButton);
      
      // 将顶部栏插入到代码块的最前面
      pre.insertBefore(header, pre.firstChild);
      
      // 调整代码块样式
      pre.classList.add('rounded-b-lg', 'mt-0');
      pre.style.marginTop = '0';
    });
  });
</script>