import React, { useEffect, useState } from 'react';
import { Button, Divider, Form, Grid, Header, Modal, Message } from 'semantic-ui-react';
import { API, removeTrailingSlash, showError } from '../helpers';

const SystemSetting = () => {
  let [inputs, setInputs] = useState({
    PasswordLoginEnabled: '',
    PasswordRegisterEnabled: '',
    EmailVerificationEnabled: '',
    GitHubOAuthEnabled: '',
    GitHubClientId: '',
    GitHubClientSecret: '',
    Notice: '',
    SMTPServer: '',
    SMTPPort: '',
    SMTPAccount: '',
    SMTPFrom: '',
    SMTPToken: '',
    ServerAddress: '',
    Footer: '',
    WeChatAuthEnabled: '',
    WeChatServerAddress: '',
    WeChatServerToken: '',
    WeChatAccountQRCodeImageURL: '',
    MessagePusherAddress: '',
    MessagePusherToken: '',
    TurnstileCheckEnabled: '',
    TurnstileSiteKey: '',
    TurnstileSecretKey: '',
    RegisterEnabled: '',
    EmailDomainRestrictionEnabled: '',
    EmailDomainWhitelist: ''
  });
  const [originInputs, setOriginInputs] = useState({});
  let [loading, setLoading] = useState(false);
  const [EmailDomainWhitelist, setEmailDomainWhitelist] = useState([]);
  const [restrictedDomainInput, setRestrictedDomainInput] = useState('');
  const [showPasswordWarningModal, setShowPasswordWarningModal] = useState(false);

  const getOptions = async () => {
    const res = await API.get('/api/option/');
    const { success, message, data } = res.data;
    if (success) {
      let newInputs = {};
      data.forEach((item) => {
        newInputs[item.key] = item.value;
      });
      setInputs({
        ...newInputs,
        EmailDomainWhitelist: newInputs.EmailDomainWhitelist.split(',')
      });
      setOriginInputs(newInputs);

      setEmailDomainWhitelist(newInputs.EmailDomainWhitelist.split(',').map((item) => {
        return { key: item, text: item, value: item };
      }));
    } else {
      showError(message);
    }
  };

  useEffect(() => {
    getOptions().then();
  }, []);

  const updateOption = async (key, value) => {
    setLoading(true);
    switch (key) {
      case 'PasswordLoginEnabled':
      case 'PasswordRegisterEnabled':
      case 'EmailVerificationEnabled':
      case 'GitHubOAuthEnabled':
      case 'WeChatAuthEnabled':
      case 'TurnstileCheckEnabled':
      case 'EmailDomainRestrictionEnabled':
      case 'RegisterEnabled':
        value = inputs[key] === 'true' ? 'false' : 'true';
        break;
      default:
        break;
    }
    const res = await API.put('/api/option/', {
      key,
      value
    });
    const { success, message } = res.data;
    if (success) {
      if (key === 'EmailDomainWhitelist') {
        value = value.split(',');
      }
      setInputs((inputs) => ({
        ...inputs, [key]: value
      }));
    } else {
      showError(message);
    }
    setLoading(false);
  };

  const handleInputChange = async (e, { name, value }) => {
    if (name === 'PasswordLoginEnabled' && inputs[name] === 'true') {
      // block disabling password login
      setShowPasswordWarningModal(true);
      return;
    }
    if (
      name === 'Notice' ||
      name.startsWith('SMTP') ||
      name === 'ServerAddress' ||
      name === 'GitHubClientId' ||
      name === 'GitHubClientSecret' ||
      name === 'WeChatServerAddress' ||
      name === 'WeChatServerToken' ||
      name === 'WeChatAccountQRCodeImageURL' ||
      name === 'TurnstileSiteKey' ||
      name === 'TurnstileSecretKey' ||
      name === 'EmailDomainWhitelist'
    ) {
      setInputs((inputs) => ({ ...inputs, [name]: value }));
    } else {
      await updateOption(name, value);
    }
  };

  const submitServerAddress = async () => {
    let ServerAddress = removeTrailingSlash(inputs.ServerAddress);
    await updateOption('ServerAddress', ServerAddress);
  };

  const submitSMTP = async () => {
    if (originInputs['SMTPServer'] !== inputs.SMTPServer) {
      await updateOption('SMTPServer', inputs.SMTPServer);
    }
    if (originInputs['SMTPAccount'] !== inputs.SMTPAccount) {
      await updateOption('SMTPAccount', inputs.SMTPAccount);
    }
    if (originInputs['SMTPFrom'] !== inputs.SMTPFrom) {
      await updateOption('SMTPFrom', inputs.SMTPFrom);
    }
    if (
      originInputs['SMTPPort'] !== inputs.SMTPPort &&
      inputs.SMTPPort !== ''
    ) {
      await updateOption('SMTPPort', inputs.SMTPPort);
    }
    if (
      originInputs['SMTPToken'] !== inputs.SMTPToken &&
      inputs.SMTPToken !== ''
    ) {
      await updateOption('SMTPToken', inputs.SMTPToken);
    }
  };


  const submitEmailDomainWhitelist = async () => {
    if (
      originInputs['EmailDomainWhitelist'] !== inputs.EmailDomainWhitelist.join(',') &&
      inputs.SMTPToken !== ''
    ) {
      await updateOption('EmailDomainWhitelist', inputs.EmailDomainWhitelist.join(','));
    }
  };

  const submitWeChat = async () => {
    if (originInputs['WeChatServerAddress'] !== inputs.WeChatServerAddress) {
      await updateOption(
        'WeChatServerAddress',
        removeTrailingSlash(inputs.WeChatServerAddress)
      );
    }
    if (
      originInputs['WeChatAccountQRCodeImageURL'] !==
      inputs.WeChatAccountQRCodeImageURL
    ) {
      await updateOption(
        'WeChatAccountQRCodeImageURL',
        inputs.WeChatAccountQRCodeImageURL
      );
    }
    if (
      originInputs['WeChatServerToken'] !== inputs.WeChatServerToken &&
      inputs.WeChatServerToken !== ''
    ) {
      await updateOption('WeChatServerToken', inputs.WeChatServerToken);
    }
  };

  const submitMessagePusher = async () => {
    if (originInputs['MessagePusherAddress'] !== inputs.MessagePusherAddress) {
      await updateOption(
        'MessagePusherAddress',
        removeTrailingSlash(inputs.MessagePusherAddress)
      );
    }
    if (
      originInputs['MessagePusherToken'] !== inputs.MessagePusherToken &&
      inputs.MessagePusherToken !== ''
    ) {
      await updateOption('MessagePusherToken', inputs.MessagePusherToken);
    }
  };

  const submitGitHubOAuth = async () => {
    if (originInputs['GitHubClientId'] !== inputs.GitHubClientId) {
      await updateOption('GitHubClientId', inputs.GitHubClientId);
    }
    if (
      originInputs['GitHubClientSecret'] !== inputs.GitHubClientSecret &&
      inputs.GitHubClientSecret !== ''
    ) {
      await updateOption('GitHubClientSecret', inputs.GitHubClientSecret);
    }
  };

  const submitTurnstile = async () => {
    if (originInputs['TurnstileSiteKey'] !== inputs.TurnstileSiteKey) {
      await updateOption('TurnstileSiteKey', inputs.TurnstileSiteKey);
    }
    if (
      originInputs['TurnstileSecretKey'] !== inputs.TurnstileSecretKey &&
      inputs.TurnstileSecretKey !== ''
    ) {
      await updateOption('TurnstileSecretKey', inputs.TurnstileSecretKey);
    }
  };

  const submitNewRestrictedDomain = () => {
    const localDomainList = inputs.EmailDomainWhitelist;
    if (restrictedDomainInput !== '' && !localDomainList.includes(restrictedDomainInput)) {
      setRestrictedDomainInput('');
      setInputs({
        ...inputs,
        EmailDomainWhitelist: [...localDomainList, restrictedDomainInput],
      });
      setEmailDomainWhitelist([...EmailDomainWhitelist, {
        key: restrictedDomainInput,
        text: restrictedDomainInput,
        value: restrictedDomainInput,
      }]);
    }
  }

  return (
    <Grid columns={1}>
      <Grid.Column>
        <Form loading={loading}>
          <Header as='h3'>通用设置</Header>
          <Form.Group widths='equal'>
            <Form.Input
              label='服务器地址'
              placeholder='例如：https://yourdomain.com'
              value={inputs.ServerAddress}
              name='ServerAddress'
              onChange={handleInputChange}
            />
          </Form.Group>
          <Form.Button onClick={submitServerAddress}>
            更新服务器地址
          </Form.Button>
          <Divider />
          <Header as='h3'>配置登录注册</Header>
          <Form.Group inline>
            <Form.Checkbox
              checked={inputs.PasswordLoginEnabled === 'true'}
              label='允许通过密码进行登录'
              name='PasswordLoginEnabled'
              onChange={handleInputChange}
            />
            {
              showPasswordWarningModal &&
              <Modal
                open={showPasswordWarningModal}
                onClose={() => setShowPasswordWarningModal(false)}
                size={'tiny'}
                style={{ maxWidth: '450px' }}
              >
                <Modal.Header>警告</Modal.Header>
                <Modal.Content>
                  <p>取消密码登录将导致所有未绑定其他登录方式的用户（包括管理员）无法通过密码登录，确认取消？</p>
                </Modal.Content>
                <Modal.Actions>
                  <Button onClick={() => setShowPasswordWarningModal(false)}>取消</Button>
                  <Button
                    color='yellow'
                    onClick={async () => {
                      setShowPasswordWarningModal(false);
                      await updateOption('PasswordLoginEnabled', 'false');
                    }}
                  >
                    确定
                  </Button>
                </Modal.Actions>
              </Modal>
            }
            <Form.Checkbox
              checked={inputs.PasswordRegisterEnabled === 'true'}
              label='允许通过密码进行注册'
              name='PasswordRegisterEnabled'
              onChange={handleInputChange}
            />
            <Form.Checkbox
              checked={inputs.EmailVerificationEnabled === 'true'}
              label='通过密码注册时需要进行邮箱验证'
              name='EmailVerificationEnabled'
              onChange={handleInputChange}
            />
            <Form.Checkbox
              checked={inputs.GitHubOAuthEnabled === 'true'}
              label='允许通过 GitHub 账户登录 & 注册'
              name='GitHubOAuthEnabled'
              onChange={handleInputChange}
            />
            <Form.Checkbox
              checked={inputs.WeChatAuthEnabled === 'true'}
              label='允许通过微信登录 & 注册'
              name='WeChatAuthEnabled'
              onChange={handleInputChange}
            />
          </Form.Group>
          <Form.Group inline>
            <Form.Checkbox
              checked={inputs.RegisterEnabled === 'true'}
              label='允许新用户注册（此项为否时，新用户将无法以任何方式进行注册）'
              name='RegisterEnabled'
              onChange={handleInputChange}
            />
            <Form.Checkbox
              checked={inputs.TurnstileCheckEnabled === 'true'}
              label='启用 Turnstile 用户校验'
              name='TurnstileCheckEnabled'
              onChange={handleInputChange}
            />
          </Form.Group>
          <Divider />
          <Header as='h3'>
            配置邮箱域名白名单
            <Header.Subheader>用以防止恶意用户利用临时邮箱批量注册</Header.Subheader>
          </Header>
          <Form.Group widths={3}>
            <Form.Checkbox
              label='启用邮箱域名白名单'
              name='EmailDomainRestrictionEnabled'
              onChange={handleInputChange}
              checked={inputs.EmailDomainRestrictionEnabled === 'true'}
            />
          </Form.Group>
          <Form.Group widths={2}>
            <Form.Dropdown
              label='允许的邮箱域名'
              placeholder='允许的邮箱域名'
              name='EmailDomainWhitelist'
              required
              fluid
              multiple
              selection
              onChange={handleInputChange}
              value={inputs.EmailDomainWhitelist}
              autoComplete='new-password'
              options={EmailDomainWhitelist}
            />
            <Form.Input
              label='添加新的允许的邮箱域名'
              action={
                <Button type='button' onClick={() => {
                  submitNewRestrictedDomain();
                }}>填入</Button>
              }
              onKeyDown={(e) => {
                if (e.key === 'Enter') {
                  submitNewRestrictedDomain();
                }
              }}
              autoComplete='new-password'
              placeholder='输入新的允许的邮箱域名'
              value={restrictedDomainInput}
              onChange={(e, { value }) => {
                setRestrictedDomainInput(value);
              }}
            />
          </Form.Group>
          <Form.Button onClick={submitEmailDomainWhitelist}>保存邮箱域名白名单设置</Form.Button>
          <Divider />
          <Header as='h3'>
            配置 SMTP
            <Header.Subheader>用以支持系统的邮件发送</Header.Subheader>
          </Header>
          <Form.Group widths={3}>
            <Form.Input
              label='SMTP 服务器地址'
              name='SMTPServer'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.SMTPServer}
              placeholder='例如：smtp.qq.com'
            />
            <Form.Input
              label='SMTP 端口'
              name='SMTPPort'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.SMTPPort}
              placeholder='默认: 587'
            />
            <Form.Input
              label='SMTP 账户'
              name='SMTPAccount'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.SMTPAccount}
              placeholder='通常是邮箱地址'
            />
          </Form.Group>
          <Form.Group widths={3}>
            <Form.Input
              label='SMTP 发送者邮箱'
              name='SMTPFrom'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.SMTPFrom}
              placeholder='通常和邮箱地址保持一致'
            />
            <Form.Input
              label='SMTP 访问凭证'
              name='SMTPToken'
              onChange={handleInputChange}
              type='password'
              autoComplete='new-password'
              checked={inputs.RegisterEnabled === 'true'}
              placeholder='敏感信息不会发送到前端显示'
            />
          </Form.Group>
          <Form.Button onClick={submitSMTP}>保存 SMTP 设置</Form.Button>
          <Divider />
          <Header as='h3'>
            配置 GitHub OAuth App
            <Header.Subheader>
              用以支持通过 GitHub 进行登录注册，
              <a href='https://github.com/settings/developers' target='_blank'>
                点击此处
              </a>
              管理你的 GitHub OAuth App
            </Header.Subheader>
          </Header>
          <Message>
            Homepage URL 填 <code>{inputs.ServerAddress}</code>
            ，Authorization callback URL 填{' '}
            <code>{`${inputs.ServerAddress}/oauth/github`}</code>
          </Message>
          <Form.Group widths={3}>
            <Form.Input
              label='GitHub Client ID'
              name='GitHubClientId'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.GitHubClientId}
              placeholder='输入你注册的 GitHub OAuth APP 的 ID'
            />
            <Form.Input
              label='GitHub Client Secret'
              name='GitHubClientSecret'
              onChange={handleInputChange}
              type='password'
              autoComplete='new-password'
              value={inputs.GitHubClientSecret}
              placeholder='敏感信息不会发送到前端显示'
            />
          </Form.Group>
          <Form.Button onClick={submitGitHubOAuth}>
            保存 GitHub OAuth 设置
          </Form.Button>
          <Divider />
          <Header as='h3'>
            配置 WeChat Server
            <Header.Subheader>
              用以支持通过微信进行登录注册，
              <a
                href='https://github.com/songquanpeng/wechat-server'
                target='_blank'
              >
                点击此处
              </a>
              了解 WeChat Server
            </Header.Subheader>
          </Header>
          <Form.Group widths={3}>
            <Form.Input
              label='WeChat Server 服务器地址'
              name='WeChatServerAddress'
              placeholder='例如：https://yourdomain.com'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.WeChatServerAddress}
            />
            <Form.Input
              label='WeChat Server 访问凭证'
              name='WeChatServerToken'
              type='password'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.WeChatServerToken}
              placeholder='敏感信息不会发送到前端显示'
            />
            <Form.Input
              label='微信公众号二维码图片链接'
              name='WeChatAccountQRCodeImageURL'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.WeChatAccountQRCodeImageURL}
              placeholder='输入一个图片链接'
            />
          </Form.Group>
          <Form.Button onClick={submitWeChat}>
            保存 WeChat Server 设置
          </Form.Button>
          <Divider />
          <Header as='h3'>
            配置 Message Pusher
            <Header.Subheader>
              用以推送报警信息，
              <a
                href='https://github.com/songquanpeng/message-pusher'
                target='_blank'
              >
                点击此处
              </a>
              了解 Message Pusher
            </Header.Subheader>
          </Header>
          <Form.Group widths={3}>
            <Form.Input
              label='Message Pusher 推送地址'
              name='MessagePusherAddress'
              placeholder='例如：https://msgpusher.com/push/your_username'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.MessagePusherAddress}
            />
            <Form.Input
              label='Message Pusher 访问凭证'
              name='MessagePusherToken'
              type='password'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.MessagePusherToken}
              placeholder='敏感信息不会发送到前端显示'
            />
          </Form.Group>
          <Form.Button onClick={submitMessagePusher}>
            保存 Message Pusher 设置
          </Form.Button>
          <Divider />
          <Header as='h3'>
            配置 Turnstile
            <Header.Subheader>
              用以支持用户校验，
              <a href='https://dash.cloudflare.com/' target='_blank'>
                点击此处
              </a>
              管理你的 Turnstile Sites，推荐选择 Invisible Widget Type
            </Header.Subheader>
          </Header>
          <Form.Group widths={3}>
            <Form.Input
              label='Turnstile Site Key'
              name='TurnstileSiteKey'
              onChange={handleInputChange}
              autoComplete='new-password'
              value={inputs.TurnstileSiteKey}
              placeholder='输入你注册的 Turnstile Site Key'
            />
            <Form.Input
              label='Turnstile Secret Key'
              name='TurnstileSecretKey'
              onChange={handleInputChange}
              type='password'
              autoComplete='new-password'
              value={inputs.TurnstileSecretKey}
              placeholder='敏感信息不会发送到前端显示'
            />
          </Form.Group>
          <Form.Button onClick={submitTurnstile}>
            保存 Turnstile 设置
          </Form.Button>
        </Form>
      </Grid.Column>
    </Grid>
  );
};

export default SystemSetting;