// @ts-check
import { defineConfig } from "astro/config";

import tailwindcss from "@tailwindcss/vite";
import mdx from "@astrojs/mdx";
import react from "@astrojs/react";
import remarkEmoji from "remark-emoji";
import rehypeExternalLinks from "rehype-external-links";
import sitemap from "@astrojs/sitemap";
import fs from "node:fs";
import path from "node:path";
import { SITE_URL } from "./src/consts";

import vercel from "@astrojs/vercel";

function getArticleDate(articleId) {
  try {
    // 处理多级目录的文章路径
    const mdPath = path.join(process.cwd(), "src/content", articleId + ".md");
    const mdxPath = path.join(process.cwd(), "src/content", articleId + ".mdx");

    let filePath = fs.existsSync(mdPath) ? mdPath : mdxPath;

    if (fs.existsSync(filePath)) {
      const content = fs.readFileSync(filePath, "utf-8");
      const match = content.match(/date:\s*(\d{4}-\d{2}-\d{2})/);
      if (match) {
        return new Date(match[1]).toISOString();
      }
    }
  } catch (error) {
    console.error("Error reading article date:", error);
  }
  return new Date().toISOString(); // 如果没有日期，返回当前时间
}

// https://astro.build/config
export default defineConfig({
  site: SITE_URL,
  output: "static",
  trailingSlash: "ignore",

  build: {
    format: "directory",
  },

  vite: {
    plugins: [tailwindcss()],
    build: {
      rollupOptions: {
        output: {
          // 手动分块配置
          manualChunks: {
            // 将地图组件单独打包
            "world-heatmap": ["./src/components/WorldHeatmap.tsx"],
            // 将 React 相关库单独打包
            "react-vendor": ["react", "react-dom"],
            // 其他大型依赖也可以单独打包
            "chart-vendor": ["chart.js"],
            // 将 ECharts 单独打包
            "echarts-vendor": ["echarts"],
            // 将其他组件打包到一起
            components: ["./src/components"],
          },
        },
      },
      // 提高警告阈值，避免不必要的警告
      chunkSizeWarningLimit: 1000,
    },
  },

  integrations: [
    // MDX 集成配置
    mdx({
      // 不使用共享的 markdown 配置
      extendMarkdownConfig: false,
      // 为 MDX 单独配置所需功能
      remarkPlugins: [
        // 添加表情符号支持
        [remarkEmoji, { emoticon: false, padded: true }]
      ],
      rehypePlugins: [
        [rehypeExternalLinks, { target: '_blank', rel: ['nofollow', 'noopener', 'noreferrer'] }]
      ],
      // 设置代码块处理行为
      remarkRehype: { 
        allowDangerousHtml: false // 不解析 HTML
      },
      gfm: true
    }),
    react(),
    sitemap({
      filter: (page) => !page.includes("/api/"),
      serialize(item) {
        if (!item) return undefined;

        // 文章页面
        if (item.url.includes("/articles/")) {
          // 从 URL 中提取文章 ID
          const articleId = item.url
            .replace(SITE_URL + "/articles/", "")
            .replace(/\/$/, "");
          const publishDate = getArticleDate(articleId);
          return {
            ...item,
            priority: 0.8,
            lastmod: publishDate,
          };
        }
        // 其他页面
        else {
          let priority = 0.7; // 默认优先级

          // 首页最高优先级
          if (item.url === SITE_URL + "/") {
            priority = 1.0;
          }
          // 文章列表页次高优先级
          else if (item.url === SITE_URL + "/articles/") {
            priority = 0.9;
          }

          return {
            ...item,
            priority,
          };
        }
      },
    }),
  ],

  // Markdown 配置
  markdown: {
    syntaxHighlight: 'prism',
    remarkPlugins: [
      [remarkEmoji, { emoticon: false, padded: true }]
    ],
    rehypePlugins: [
      [rehypeExternalLinks, { target: '_blank', rel: ['nofollow', 'noopener', 'noreferrer'] }]
    ],
    gfm: true,
    // 设置 remark-rehype 选项，以控制HTML处理
    remarkRehype: { 
      // 保留原始HTML格式，但仅在非代码块区域
      allowDangerousHtml: true,
      // 确保代码块内容不被解析
      passThrough: ['code']
    },
    shikiConfig: {
      theme: "github-dark",
      langs: [],
      wrap: true,
    },
  },

  adapter: vercel(),
});