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/* global gapi */
/* global google */
/* global Encoding */
/* global KintoneRestAPIClient */

(() => {
  'use strict';

  // ログインのフラグ
  let tokenClient = false,
    isInitializeGapi = false,
    isInitializeGsi = false;

  // 設定
  const AppSetting = {
    CLIENT_ID: 'クライアントID',
    API_KEY: 'APIキー',
    DISCOVERY_DOC: 'https://www.googleapis.com/discovery/v1/apis/gmail/v1/rest',
    SCOPES: 'https://mail.google.com/',
    fieldsCode: {
      attachment: 'attachment',
      bcc: 'bcc',
      cc: 'cc',
      content: 'message',
      dateTime: 'Date_and_time',
      from: 'from',
      labels: 'labels_id',
      mailAccount: 'email_account',
      messageID: 'message_id',
      owner: 'owner',
      subject: 'subject',
      threadID: 'thread_id',
      to: 'to'
    },
    profile: {emailAddress: ''},
    extensionProhibited: [
      'ADE', 'ADP', 'BAT', 'CHM', 'CMD', 'COM',
      'CPL', 'DLL', 'DMG', 'EXE', 'HTA', 'INS',
      'ISP', 'JAR', 'JS', 'JSE', 'LIB', 'LNK',
      'MDE', 'MSC', 'MSI', 'MSP', 'MST', 'NSH',
      'PIF', 'SCR', 'SCT', 'SHB', 'SYS', 'VB',
      'VBE', 'VBS', 'VXD', 'WSC', 'WSF', 'WSH'
    ],
    maxEmailSize: 5 * 1024 * 1024, // (byte) ~5MB
    maxMessagesForGet: 45,
  };

  // スピナーを動作させる関数
  const showSpinner = ()=> {
    // 要素作成等初期化処理
    if (document.getElementsByClassName('kintone-spinner').length === 0) {
      // スピナー設置用要素と背景要素の作成
      const spnDiv = document.createElement('div');
      spnDiv.id = 'kintone-spin';
      spnDiv.classList.add('kintone-spinner');
      const spinBgDiv = document.createElement('div');
      spinBgDiv.id = 'kintone-spin-bg';
      spinBgDiv.classList.add('kintone-spinner');

      // スピナー用要素をbodyにappend
      document.body.appendChild(spnDiv);
      document.body.appendChild(spinBgDiv);

      // スピナーに対するオプション設定
      const opts = {
        lines: 11, // The number of lines to draw
        length: 38, // The length of each line
        width: 17, // The line thickness
        radius: 45, // The radius of the inner circle
        scale: 1, // Scales overall size of the spinner
        corners: 1, // Corner roundness (0..1)
        speed: 1, // Rounds per second
        rotate: 0, // The rotation offset
        animation: 'spinner-line-fade-more', // The CSS animation name for the lines
        direction: 1, // 1: clockwise, -1: counterclockwise
        color: '#000', // CSS color or array of colors
        fadeColor: 'transparent', // CSS color or array of colors
        top: '50%', // Top position relative to parent
        left: '50%', // Left position relative to parent
        shadow: '0 0 1px transparent', // Box-shadow for the lines
        zIndex: 2000000000, // The z-index (defaults to 2e9)
        className: 'spinner', // The CSS class to assign to the spinner
        position: 'absolute', // Element positioning
      };

      // スピナーを作動
      new Spinner(opts).spin(document.getElementById('kintone-spin'));
    }

    // スピナー始動（表示）
    document.getElementById('kintone-spin-bg').style.display = 'block';
    document.getElementById('kintone-spin').style.display = 'block';
  };

  // スピナーを停止させる関数
  const hideSpinner = () => {
  // スピナー停止（非表示）
    document.getElementById('kintone-spin-bg').style.display = 'none';
    document.getElementById('kintone-spin').style.display = 'none';
  };

  // Googleログイン＆ログアウト
  const loadGapi = () => {
    gapi.load('client', intializeGapiClient);
  };

  const intializeGapiClient = async () => {
    await gapi.client.init({
      apiKey: AppSetting.API_KEY,
      discoveryDocs: [AppSetting.DISCOVERY_DOC],
    });
    isInitializeGapi = true;
    checkBeforeStart();
  };

  const loadGsi = () => {
    tokenClient = google.accounts.oauth2.initTokenClient({
      client_id: AppSetting.CLIENT_ID,
      scope: AppSetting.SCOPES,
      callback: '',
    });
    isInitializeGsi = true;
    checkBeforeStart();
  };

  // ログイン準備ができたらログインボタン表示
  const checkBeforeStart = () => {
    if (isInitializeGapi && isInitializeGsi) {
      document.getElementById('loginButton').style.visibility = 'visible';
    }
  };

  // Googleログインボタンクリック
  const handleLoginClick = () => {
    tokenClient.callback = async (resp) => {
      if (resp.error !== undefined) {
        throw resp;
      }
      document.getElementById('logoutButton').style.visibility = 'visible';
      document.getElementById('getMailButton').style.visibility = 'visible';
      document.getElementById('loginButton').innerText = 'Refresh';

      // プロフィールデータ取得
      AppSetting.profile.emailAddress = (await gapi.client.gmail.users.getProfile({userId: 'me'})).result.emailAddress;

    };
    if (gapi.client.getToken() === null) {
      tokenClient.requestAccessToken({prompt: 'consent'});
    } else {
      tokenClient.requestAccessToken({prompt: ''});
    }
  };

  // Googleログアウトボタンクリック
  const handleLogoutClick = () => {
    const token = gapi.client.getToken();
    if (token !== null) {
      google.accounts.oauth2.revoke(token.access_token);
      gapi.client.setToken('');
      document.getElementById('loginButton').innerText = 'Authorize';
      document.getElementById('logoutButton').style.visibility = 'hidden';
      document.getElementById('getMailButton').style.visibility = 'hidden';
    }
  };


  // メール送信
  const parseRecordDataToEmailData = (record) => {
    const result = {};
    for (const key in AppSetting.fieldsCode) {
      if (Object.prototype.hasOwnProperty.call(AppSetting.fieldsCode, key)) {
        const fieldCode = AppSetting.fieldsCode[key];
        result[key] = record[fieldCode].value;
      }
    }
    return result;
  };

  // 送信メールBase64URLエンコード
  const encodeSender = (senderString) => {
    const senderArray = String(senderString).trim().split(',');
    const senderResult = [];
    senderArray.forEach((sender) => {
      const patternSender = new RegExp(/(.*)<(.*)>/);
      const result = patternSender.exec(sender.trim());
      let email = '';
      let emailEncoded = '';
      if (result !== null && result.length === 3) {
        emailEncoded = encodeUTF8(result[1]) + ' <' + result[2] + '>';
        email = result[2];
      } else {
        emailEncoded = sender;
        email = sender;
      }
      if (email === '') {
        throw new Error('Emailアドレスが不正です。');
      }
      senderResult.push(emailEncoded);
    });
    return senderResult.join(',');
  };
  const encodeStringToBase64 = (string) => {
    return Encoding.base64Encode((new TextEncoder()).encode(string));
  };
  const encodeUTF8 = (string) => {
    return '=?UTF-8?B?' + encodeStringToBase64(string) + '?=';
  };
  const getByteOfString = (string) => {
    return encodeURI(string).split(/%..|./).length - 1;
  };
  const mineMessage = (data) => {
    const boundary = 'kintoneBoundaryData';
    const mineData = [];
    mineData.push('Content-Type: multipart/mixed; charset="UTF-8"; boundary="' + boundary + '"\r\n');
    mineData.push('MIME-Version: 1.0\r\n');
    if (data.from) {
      mineData.push('From: ' + encodeSender(data.from) + '\r\n');
    }
    if (data.to) {
      mineData.push('To: ' + encodeSender(data.to) + '\r\n');
    }
    if (data.cc) {
      mineData.push('Cc: ' + encodeSender(data.cc) + '\r\n');
    }
    if (data.bcc) {
      mineData.push('Bcc: ' + encodeSender(data.bcc) + '\r\n');
    }
    if (data.subject) {
      mineData.push('Subject: ' + encodeUTF8(data.subject) + '\r\n\r\n');
    }
    if (data.content) {
      mineData.push('--' + boundary + '\r\n');
      mineData.push('Content-Type: text/html; charset="UTF-8"\r\n');
      mineData.push('MIME-Version: 1.0\r\n');
      mineData.push('Content-Transfer-Encoding: 8bit\r\n\r\n');
      mineData.push(data.content + '\r\n\r\n');
    }
    if (data.attachment) {
      data.attachment.forEach((attach) => {
        mineData.push('--' + boundary + '\r\n');
        mineData.push('Content-Type: ' + attach.contentType + '\r\n');
        mineData.push('MIME-Version: 1.0\r\n');
        mineData.push('Content-Transfer-Encoding: base64\r\n');
        mineData.push('Content-Disposition: attachment; filename="' + attach.fileKey + '"');
      });
    }
    mineData.push('--' + boundary + '--');
    return mineData.join('');
  };
  // 添付ファイルの拡張子を返す
  const getFileExtension = (fileName) => {
    if (!fileName) {
      return '';
    }
    return String(fileName.split('.').pop()).toUpperCase();
  };
  // レコードから送信メールデータを作成する
  const makeMailData = (mailData) => {
    let mineEmail = mineMessage(mailData);
    let hasAttachment = false;
    let mineEmailByte = getByteOfString(mineEmail);
    if (mailData.attachment && Array.isArray(mailData.attachment) && mailData.attachment.length > 0) {
      hasAttachment = true;
      mailData.attachment.forEach((att) => {
        // 添付ファイルの拡張子チェック
        const fileExt = getFileExtension(att.name);
        if (AppSetting.extensionProhibited.indexOf(fileExt) >= 0) {
          throw new Error(`${att.name}は添付できない拡張子のファイルです`);
        }
        // ファイルサイズ計算
        mineEmailByte += Number(att.size);
        mineEmailByte -= getByteOfString(att.fileKey);
        mineEmailByte += getByteOfString(att.name + '\r\n\r\n\r\n\r\n');
      });
    }
    if (mineEmailByte >= AppSetting.maxEmailSize) {
      throw new Error('メールの送信可能サイズを超えています。');
    }
    // 添付ファイルがなければこの時点のmineEmailを返す
    if (hasAttachment === false) {
      return mineEmail;
    }
    // 添付ファイルが有れば、mineEmailに添付ファイルデータ分付け足して返す
    return downloadAttachments(mailData.attachment)
      .then((mailAttachments) => {
        mailAttachments.forEach((att) => {
          mineEmail = mineEmail.replace('"' + att.fileKey + '"', '"' + att.name + '"\r\n\r\n' + att.contentBytes + '\r\n\r\n');
        });
        return mineEmail;
      });
  };

  // kintoneの添付ファイルをダウンロードしてファイルデータをエンコードしたものを返す
  const downloadAttachments = (attachments) => {
    const attachmentPromise = [];
    for (let i = 0; i < attachments.length; i++) {
      attachmentPromise.push(downloadAttachment(attachments[i]));
    }
    return kintone.Promise.all(attachmentPromise)
      .catch((error) => {
        console.log(error.message);
      });
  };

  // kintoneの添付ファイルをダウンロードしてエンコードする
  const downloadAttachment = (kintoneFileData) => {
    const url = '/k/v1/file.json?fileKey=' + kintoneFileData.fileKey;
    return new kintone.Promise((resolve, reject) => {
      const xhr = new XMLHttpRequest();
      xhr.open('GET', url, true);
      xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
      xhr.responseType = 'arraybuffer';
      xhr.onload = () => {
        kintoneFileData.contentBytes = encodeBufferToBase64(xhr.response);
        resolve(kintoneFileData);
      };
      xhr.onerror = (e) => {
        reject(e);
      };
      xhr.send();
    });
  };

  // エンコード
  const encodeBufferToBase64 = (arraybuffer) => {
    let binary = '';
    const bytes = new Uint8Array(arraybuffer);
    const len = bytes.byteLength;
    for (let i = 0; i < len; i++) {
      binary += String.fromCharCode(bytes[i]);
    }
    return window.btoa(binary);
  };

  // メール送信する
  const sendMail = async (record) => {
    try {
      // スピナー表示
      showSpinner();
      const emailAddress = (await gapi.client.gmail.users.getProfile({userId: 'me'})).result.emailAddress;
      const mineEmail = await makeMailData(parseRecordDataToEmailData(record));
      const rawdata = Encoding.base64Encode((new TextEncoder()).encode(mineEmail)).replaceAll('/', '_').replaceAll('+', '-');
      const dataEmailResponse = await gapi.client.gmail.users.messages.send({
        userId: 'me',
        resource: {raw: rawdata}
      });

      // メール送信後にレコードを更新する
      const updateRecordData = {};
      updateRecordData[AppSetting.fieldsCode.messageID] = {
        value: dataEmailResponse.result.id
      };
      updateRecordData[AppSetting.fieldsCode.threadID] = {
        value: dataEmailResponse.result.threadId
      };
      updateRecordData[AppSetting.fieldsCode.labels] = {
        value: dataEmailResponse.result.labelIds ? dataEmailResponse.result.labelIds.join(',') : ''
      };
      updateRecordData[AppSetting.fieldsCode.mailAccount] = {
        value: emailAddress
      };
      updateRecordData[AppSetting.fieldsCode.owner] = {
        value: [{
          code: kintone.getLoginUser().code,
          type: 'USER'
        }]
      };
      updateRecordData[AppSetting.fieldsCode.from] = {
        value: emailAddress
      };
      // レコード更新
      await kintone.api('/k/v1/record.json', 'PUT', {
        app: kintone.app.getId(),
        id: kintone.app.record.getId(),
        record: updateRecordData
      });
      location.reload();
      alert('メール送信完了');
    } catch (error) {
      console.log(error.message);
      alert('メール送信失敗');
    } finally {
      // スピナー非表示
      hideSpinner();
    }
  };

  // メール受信
  const getBodyMessage = (dataParts, type) => {
    for (let index = 0; index < dataParts.length; index++) {
      const bodyPart = dataParts[index];
      if (bodyPart.parts) {
        return getBodyMessage(bodyPart.parts, type);
      }
      const body = bodyPart.body.data || '';
      if (bodyPart.mimeType === type) {
        return body;
      }
    }
    return '';
  };

  // メールのヘッダデータ取得
  const getHeaders = (arrayKeys, payloadData) => {
    const result = {};
    if (!arrayKeys || !Array.isArray(arrayKeys)) {
      return result;
    }
    for (let i = 0; i < payloadData.headers.length; i++) {
      if (arrayKeys.indexOf(payloadData.headers[i].name) !== -1) {
        result[payloadData.headers[i].name.toLowerCase()] = payloadData.headers[i].value;
      }
    }
    return result;
  };

  // メールの添付ファイルを取得
  const getAttachmentFiles = (payloadData) =>{
    const fs = [];
    if (!payloadData.parts) {
      return fs;
    }

    function getFiles(dataParts) {
      dataParts.forEach((part) => {
        if (part.parts) {
          return getFiles(part.parts);
        }
        if (part.filename !== '' && part.body.attachmentId) {
          fs.push(part);
        }
        return true;
      });
    }

    getFiles(payloadData.parts);
    return fs;
  };

  // 受信メールから新規レコードを作成
  const makeKintonMailData = async (mid) => {
    const mailData = await gapi.client.gmail.users.messages.get({
      userId: 'me',
      id: mid,
    });

    const result = {
      headers: getHeaders(['From', 'To', 'Cc', 'Bcc', 'Subject'], mailData.result.payload),
      fileKeys: [],
      mailInfo: {
        id: mid,
        threadId: mailData.result.threadId,
        labelIds: mailData.result.labelIds,
        date: mailData.result.internalDate,
      },
      profile: {
        emailAddress: AppSetting.profile.emailAddress,
      }
    };

    result.files = getAttachmentFiles(mailData.result.payload);

    if (!mailData.result.payload.parts) {
      result.body = decodeMessage(mailData.result.payload.body.data, mailData) || '';
    } else {

      const msgBody = getBodyMessage(mailData.result.payload.parts, 'text/html') || getBodyMessage(mailData.result.payload.parts, 'text/plain');
      result.body = decodeMessage(msgBody, mailData);
    }
    return addMailIntoKintone(result.mailInfo, result.headers, result.body, result.profile, result.files);
  };

  // kintoneにPOSTするリクエストボディのrecord情報作成
  const addMailIntoKintone = async (mailInfo, headers, body, profile, files) => {
    const kintoneRecord = {};
    kintoneRecord[AppSetting.fieldsCode.subject] = {
      value: headers.subject
    };
    kintoneRecord[AppSetting.fieldsCode.from] = {
      value: headers.from
    };
    kintoneRecord[AppSetting.fieldsCode.to] = {
      value: headers.to
    };
    kintoneRecord[AppSetting.fieldsCode.cc] = {
      value: headers.cc || ''
    };
    kintoneRecord[AppSetting.fieldsCode.bcc] = {
      value: headers.bcc || ''
    };
    const content = body;
    kintoneRecord[AppSetting.fieldsCode.content] = {
      value: content
    };
    kintoneRecord[AppSetting.fieldsCode.dateTime] = {
      value: (new Date(Number(mailInfo.date))).toISOString()
    };
    kintoneRecord[AppSetting.fieldsCode.threadID] = {
      value: mailInfo.threadId
    };
    kintoneRecord[AppSetting.fieldsCode.messageID] = {
      value: mailInfo.id
    };
    kintoneRecord[AppSetting.fieldsCode.labels] = {
      value: getLabelsStringForStorage(mailInfo.labelIds)
    };
    kintoneRecord[AppSetting.fieldsCode.mailAccount] = {
      value: profile.emailAddress
    };

    kintoneRecord[AppSetting.fieldsCode.owner] = {
      value: [{
        code: kintone.getLoginUser().code,
        type: 'USER'
      }]
    };

    if (files && files.length > 0) {
      kintoneRecord[AppSetting.fieldsCode.attachment] = {
        value: await uploadFileToKintone(mailInfo.id, files, 0, []),
      };
    }

    return addNewRecord(kintoneRecord);
  };

  // POSTする
  const addNewRecord = (kintoneRecord) => {
    return kintone.api('/k/v1/record.json', 'POST', {
      app: kintone.app.getId(),
      record: kintoneRecord
    });
  };

  const getLabelsStringForStorage = (labelList) => {
    return labelList.filter((item) => {
      return ['INBOX', 'SENT'].indexOf(item) > -1;
    }).join(', ');
  };

  // メールの添付ファイルをkintoneに保存できるようにエンコードする
  const encodeAttachmentBase64ToBlob = (base64String, contentType) => {
    const binary = decodeAttachment(base64String);
    const blob = new Blob([binary], {
      type: (contentType || 'octet/stream') + ';charset=utf-8;'
    });
    return blob;
  };

  // 添付ファイルをkintoneにアップロードする
  const uploadFileToKintone = async (messageID, files, index, kintoneFilesKey) => {
    const file = files[index];

    const attachment = await gapi.client.gmail.users.messages.attachments.get({
      id: file.body.attachmentId,
      messageId: messageID,
      userId: 'me',
    });

    // Create form file
    const formFile = new FormData();
    const blobFileAttachment = encodeAttachmentBase64ToBlob(attachment.result.data, file.mimeType);
    formFile.append('__REQUEST_TOKEN__', kintone.getRequestToken());
    formFile.append('file', blobFileAttachment, file.filename);

    const kintoneFileResponse = await uploadFile(kintone.api.url('/k/v1/file.json'), 'POST', formFile);
    kintoneFilesKey.push(window.JSON.parse(kintoneFileResponse.response));

    // POST files to kintone
    if (index + 1 < files.length) {
      return uploadFileToKintone(messageID, files, index + 1, kintoneFilesKey);
    }
    return kintoneFilesKey;
  };

  // kintoneにファイルをアップロードする
  const uploadFile = (url, method, formData, headers) => {
    return new kintone.Promise((resolve, reject) => {
      const xhrRequest = new XMLHttpRequest();
      xhrRequest.open(method, url);
      if (headers) {
        headers.forEach((header) => {
          if (header.key && header.value) {
            xhrRequest.setRequestHeader(header.key, header.value);
          }
        });
      }
      xhrRequest.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
      xhrRequest.onload = function() {
        if (xhrRequest.status === 200) {
          resolve(this);
        } else {
          reject(xhrRequest);
        }
      };
      xhrRequest.send(formData);
    });
  };

  // メールの本文データをデコード
  const decodeMessage = (msg)=>{
    return new TextDecoder().decode(new Uint8Array(Encoding.base64Decode(msg.replaceAll('_', '/').replaceAll('-', '+'))));
  };

  // メールの添付ファイルをデコード
  function decodeAttachment(stringEncoded) {
    return new Uint8Array(Encoding.base64Decode(stringEncoded.replaceAll('_', '/').replaceAll('-', '+')));
  }

  // kintoneに保存していない受信メールのリストを取得
  const getPageOfMessages = async (allMsgList, dataRequest) =>{
    const msgList = await gapi.client.gmail.users.messages.list(dataRequest);
    if (msgList.result.nextPageToken) {
      const nextDataRequest = dataRequest;
      nextDataRequest.pageToken = msgList.result.nextPageToken;
      return getPageOfMessages(allMsgList.concat(msgList.result.messages), nextDataRequest);
    }
    return allMsgList.concat(msgList.result.messages);
  };

  // メール受信
  const getMails = async () => {
    try {
      // スピナー表示
      showSpinner();
      // メールリストから受診していないメールIDを取得
      const allList = await getPageOfMessages([], {
        userId: 'me',
        maxResults: 500,
        includeSpamTrash: false,
      });

      // メールが1件もなければエラー
      if (!allList || allList.length === 0) {
        throw new Error('No messages found.');
      }

      const rmsgIdArry = [];

      // レコード全件取得
      const client = new KintoneRestAPIClient();
      const allRecords = await client.record.getAllRecords({app: kintone.app.getId(), fields: [AppSetting.fieldsCode.messageID]});

      allRecords.forEach((r) => {
        rmsgIdArry.push(r[AppSetting.fieldsCode.messageID].value);
      });

      // まだ受診していないメールIDを最大45件取得
      const getMailIds = allList.filter(i => rmsgIdArry.indexOf(i.id) === -1).slice(0, AppSetting.maxMessagesForGet);

      const results = [];
      getMailIds.forEach(m=>{
        results.push(makeKintonMailData(m.id));
      });

      await Promise.all(results)
        .then((resp)=>{
          alert('メール受信成功！');
        });
    } catch (error) {
      console.log(error.message);
      alert('メール受信失敗');
    } finally {
      // スピナー非表示
      hideSpinner();
      location.reload();
    }
  };


  // レコード一覧
  kintone.events.on('app.record.index.show', (event) => {

    const sp = kintone.app.getHeaderMenuSpaceElement();
    // ボタンを作る
    const loginButton = document.createElement('button');
    loginButton.id = 'loginButton';
    const logoutButton = document.createElement('button');
    logoutButton.id = 'logoutButton';
    const getMailButton = document.createElement('button');
    getMailButton.id = 'getMailButton';
    // ボタンに表示したいテキスト
    loginButton.textContent = 'Gmailログイン';
    logoutButton.textContent = 'Gmailログアウト';
    getMailButton.textContent = 'メール受信';
    // スペースフィールドにボタンを追加する
    sp.appendChild(loginButton);
    sp.appendChild(logoutButton);
    sp.appendChild(getMailButton);
    loginButton.style.visibility = 'hidden';
    logoutButton.style.visibility = 'hidden';
    getMailButton.style.visibility = 'hidden';
    loginButton
      .addEventListener('click', handleLoginClick);
    logoutButton
      .addEventListener('click', handleLogoutClick);
    getMailButton
      .addEventListener('click', getMails);

    // ログイン準備
    loadGapi();
    loadGsi();
    return event;
  });

  // レコード詳細
  kintone.events.on('app.record.detail.show', (event) => {

    const sp = kintone.app.record.getHeaderMenuSpaceElement();
    // ボタンを作る
    const loginButton = document.createElement('button');
    loginButton.id = 'loginButton';
    const logoutButton = document.createElement('button');
    logoutButton.id = 'logoutButton';
    const sendMailButton = document.createElement('button');
    sendMailButton.id = 'getMailButton';
    // ボタンに表示したいテキスト
    loginButton.textContent = 'Gmailログイン';
    logoutButton.textContent = 'Gmailログアウト';
    sendMailButton.textContent = 'メール送信';
    // スペースフィールドにボタンを追加する
    sp.appendChild(loginButton);
    sp.appendChild(logoutButton);
    sp.appendChild(sendMailButton);
    loginButton.style.visibility = 'hidden';
    logoutButton.style.visibility = 'hidden';
    sendMailButton.style.visibility = 'hidden';
    loginButton
      .addEventListener('click', handleLoginClick);
    logoutButton
      .addEventListener('click', handleLogoutClick);
    sendMailButton
      .addEventListener('click', sendMail.bind(null, event.record));

    // ログイン準備
    loadGapi();
    loadGsi();
    return event;
  });

  kintone.events.on([
    'app.record.index.edit.show',
    'app.record.edit.show',
    'app.record.create.show'
  ],
  (event) =>{
    event.record[AppSetting.fieldsCode.from].disabled = true;
    if (event.type === 'app.record.create.show') {
      event.record[AppSetting.fieldsCode.from].value = '';
      event.record[AppSetting.fieldsCode.threadID].value = '';
      event.record[AppSetting.fieldsCode.labels].value = '';
      event.record[AppSetting.fieldsCode.mailAccount].value = '';
      event.record[AppSetting.fieldsCode.messageID].value = '';
      event.record[AppSetting.fieldsCode.owner].value = [{
        code: kintone.getLoginUser().code
      }];
    }
    return event;
  });

})();

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// 設定
const AppSetting = {
  CLIENT_ID: 'クライアントID',
  API_KEY: 'APIキー',
  // 省略..
};