function main() {
  const now = new Date();
  const hour = now.getHours();   // 0〜23
  const minute = now.getMinutes(); // 0〜59

  const isNight = (hour >= 22 || hour < 5); // 22:00〜翌5:00

  if (isNight) {
    // 夜間：5分ごとに1回実行（minute が 0,5,10,15… のときだけ動く）
    if (minute % 4 !== 0) {
      return; // 実行せず終了
    }
  }

  replaceYouTubeURLsInDocument();
}


function replaceYouTubeURLsInDocument() {
  const documentId = '1uOCQbGhxxUw6qkXCLMMARY92Rte4vvt0WniNminzQp8';
  const doc = DocumentApp.openById(documentId);
  const body = doc.getBody();

  const youtubeRegex = /(https?:\/\/[^\s]+)/g;

  const texts = getAllTextElements(body);

  texts.forEach(text => {
    let t = text.getText();
    const matches = [...t.matchAll(youtubeRegex)];
    if (matches.length === 0) return;

    matches.forEach(match => {
      const url = match[0];

      const videoIdMatch = url.match(/(?:v=|youtu\.be\/)([A-Za-z0-9_-]{11})/);
      if (!videoIdMatch) return;

      const videoId = videoIdMatch[1];

      // 変更：URL と 表示ラベルを生成する新形式のデータ
      const result = getVidflyDataFormatted(videoId);
      if (!result) return;

      const replacementText = result.text;  // Title + formatted list

      // 元 URL を replacementText に置換して反映
      t = t.replace(url, replacementText);
      text.setText(t);

      // ハイパーリンクを設定
      const insertedPos = t.indexOf(result.title);
      let cursor = insertedPos + result.title.length + 1;

      result.links.forEach(item => {
        const label = item.label;
        const linkUrl = item.url;

        const start = t.indexOf(label, cursor);
        if (start === -1) return;

        const end = start + label.length - 1;

        text.setLinkUrl(start, end, linkUrl);

        cursor = end + 1;
      });
    });
  });

  console.log("Completed.");
}

function getAllTextElements(element) {
  const result = [];
  const numChild = element.getNumChildren();

  for (let i = 0; i < numChild; i++) {
    const child = element.getChild(i);

    if (child.getType() === DocumentApp.ElementType.TEXT) {
      result.push(child.asText());
    } else if (child.getNumChildren) {
      result.push(...getAllTextElements(child));
    }
  }
  return result;
}

function getVidflyDataFormatted(videoId) {
  try {
    const youtubeUrl = `https://www.youtube.com/watch?v=${videoId}`;
    const encodedUrl = encodeURIComponent(youtubeUrl);
    const apiUrl = `https://corsproxy.io/?url=https%3A%2F%2Fapi.vidfly.ai%2Fapi%2Fmedia%2Fyoutube%2Fdownload%3Furl%3D${encodedUrl}`;

    const response = UrlFetchApp.fetch(apiUrl, {
      method: 'GET',
      muteHttpExceptions: true,
      headers: {
        'User-Agent': 'Mozilla/5.0'
      }
    });

    if (response.getResponseCode() !== 200) return null;

    const data = JSON.parse(response.getContentText());
    if (!data || !data.data || !data.data.items) return null;

    const title = data.data.title || "タイトルなし";

    const links = [];

    data.data.items.forEach(item => {
      if (!item.url) return;

      // 表示名
      let label = item.label || "No label";

      // ファイルタイプの判定
      let fileType = "";
      const lowerLabel = label.toLowerCase();
      
      // 動画形式の判定
      if (lowerLabel.includes('mp4') || lowerLabel.includes('webm')) {
        fileType = "（動画）";
      }
      // 音声形式の判定
      else if (lowerLabel.includes('mp3') || lowerLabel.includes('m4a') || lowerLabel.includes('opus')) {
        fileType = "（音声）";
      }

      // type: video_with_audio → 「音声付き」
      if (item.type === "video_with_audio") {
        label = label + "（音声付き）";
      } else {
        label = label + fileType;
      }

      links.push({
        url: item.url,
        label: label
      });
    });

    // 文書に書き込む text を構築
    const lines = [];
    lines.push(title);               // ←最初にタイトルを表示
    links.forEach(l => lines.push(l.label));

    return {
      title: title,
      text: lines.join("\n"),
      links: links
    };

  } catch (e) {
    console.error("Vidfly error: " + e);
    return null;
  }
}
    

<script defer data-domain="html.cafe" src="https://milkymouse.com/js/script.js"></script>