import Settings from '@/../config/defaultSettings';
import oidcLogo from '@/assets/oidc-logo.svg';
import { PageFooter } from '@/components';
import { login } from '@/services/api';
import { API } from '@/services/typings';
import { LockOutlined, UserOutlined } from '@ant-design/icons';
import { LoginForm, ProFormCheckbox, ProFormText } from '@ant-design/pro-components';
import { Helmet, history, useModel } from '@umijs/max';
import { Alert, Button, Tabs, message } from 'antd';
import { createStyles } from 'antd-style';
import React, { CSSProperties, useState } from 'react';
import { flushSync } from 'react-dom';

const iconStyles: CSSProperties = {
  transform: 'translateY(-12%)',
};

const useStyles = createStyles(({ token }) => {
  return {
    action: {
      marginLeft: '8px',
      color: 'rgba(0, 0, 0, 0.2)',
      fontSize: '24px',
      verticalAlign: 'middle',
      cursor: 'pointer',
      transition: 'color 0.3s',
      '&:hover': {
        color: token.colorPrimaryActive,
      },
    },
    lang: {
      width: 42,
      height: 42,
      lineHeight: '42px',
      position: 'fixed',
      right: 16,
      borderRadius: token.borderRadius,
      ':hover': {
        backgroundColor: token.colorBgTextHover,
      },
    },
    container: {
      display: 'flex',
      flexDirection: 'column',
      height: '100vh',
      overflow: 'auto',
      backgroundImage:
        "url('https://mdn.alipayobjects.com/yuyan_qk0oxh/afts/img/V-_oS6r-i7wAAAAAAAAAAAAAFl94AQBr')",
      backgroundSize: '100% 100%',
    },
  };
});
const LoginMessage: React.FC<{
  content: string;
}> = ({ content }) => {
  return (
    <Alert
      style={{
        marginBottom: 24,
      }}
      message={content}
      type="error"
      showIcon
    />
  );
};

const randomString = (length: number) => {
  const chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
  const maxPos = chars.length;
  let randomStr = '';
  for (let i = 0; i < length; i++) {
    randomStr += chars.charAt(Math.floor(Math.random() * maxPos));
  }
  return randomStr;
};

const generateLink = () => {
  const preLink =
    'https://auth.zjueva.net/connect/authorize?response_type=code&client_id=ETA&redirect_uri=https://xms.zjueva.net/api/external_sign&scope=openid&state=';
  return preLink + randomString(30);
};

const Login: React.FC = () => {
  const [userLoginState, setUserLoginState] = useState<API.LoginResult>({});
  const [type, setType] = useState<string>('account');
  const { initialState, setInitialState } = useModel('@@initialState');
  const { styles } = useStyles();
  const fetchUserInfo = async () => {
    const userInfo = await initialState?.fetchUserInfo?.();
    if (userInfo) {
      flushSync(() => {
        setInitialState((s: any) => ({
          ...s,
          currentUser: userInfo,
        }));
      });
    }
  };
  const handleSubmit = async (values: API.LoginParams) => {
    try {
      // 登录
      const msg = await login({
        ...values,
        type,
      });
      if (msg.status === 'ok') {
        const defaultLoginSuccessMessage = '登录成功！';
        message.success(defaultLoginSuccessMessage);
        await fetchUserInfo();
        const urlParams = new URL(window.location.href).searchParams;
        history.push(urlParams.get('redirect') || '/');
        return;
      }
      console.log(msg);
      // 如果失败去设置用户错误信息
      setUserLoginState(msg);
    } catch (error) {
      const defaultLoginFailureMessage = '登录失败，请重试！';
      console.log(error);
      message.error(defaultLoginFailureMessage);
    }
  };
  const { status, type: loginType } = userLoginState;
  return (
    <div className={styles.container}>
      <Helmet>
        <title>
          {'登录'}- {Settings.title}
        </title>
      </Helmet>
      <div
        style={{
          flex: '1',
          padding: '32px 0',
        }}
      >
        <LoginForm
          contentStyle={{
            minWidth: 280,
            maxWidth: '75vw',
          }}
          logo={<img alt="logo" src="/logo.svg" />}
          title="EVA Tea"
          subTitle={'E志者协会是东区教学楼最专业的志愿维修组织'}
          initialValues={{
            autoLogin: true,
          }}
          onFinish={async (values: API.LoginParams) => {
            await handleSubmit(values as API.LoginParams);
          }}
        >
          <Tabs
            activeKey={type}
            onChange={setType}
            centered
            items={[
              {
                key: 'account',
                label: '账户密码登录',
              },
            ]}
          />

          {status === 'error' && loginType === 'account' && (
            <LoginMessage content={'错误的用户名和密码(admin/ant.design)'} />
          )}
          {type === 'account' && (
            <>
              <ProFormText
                name="username"
                fieldProps={{
                  size: 'large',
                  prefix: <UserOutlined />,
                }}
                placeholder={'用户名: admin or user'}
                rules={[
                  {
                    required: true,
                    message: '用户名是必填项！',
                  },
                ]}
              />
              <ProFormText.Password
                name="password"
                fieldProps={{
                  size: 'large',
                  prefix: <LockOutlined />,
                }}
                placeholder={'密码: ant.design'}
                rules={[
                  {
                    required: true,
                    message: '密码是必填项！',
                  },
                ]}
              />
            </>
          )}

          <div
            style={{
              marginBottom: 24,
            }}
          >
            <ProFormCheckbox noStyle name="autoLogin">
              自动登录
            </ProFormCheckbox>
          </div>
          <div style={{ marginBottom: '2vh' }}>
            {' '}
            <Button
              type="default"
              block
              size="large"
              href={generateLink()}
              style={{ backgroundColor: '#e0af68', color: '#ffffff' }}
            >
              <div>
                <img src={oidcLogo} width="23px" style={iconStyles} />
                &nbsp; 使用 EVA 统一身份认证
              </div>
            </Button>
          </div>
        </LoginForm>
      </div>
      <PageFooter />
    </div>
  );
};
export default Login;