import { useEffect, useState } from 'react'
import {
  Button,
  Card,
  Checkbox,
  Form,
  Input,
  Typography,
  theme,
} from 'antd'
import {
  LockOutlined,
  LoginOutlined,
  SafetyCertificateOutlined,
  UserOutlined,
} from '@ant-design/icons'
import { useNavigate } from 'react-router-dom'
import { toast } from 'sonner'
import { apiUserLogin } from '@/apis/apisUser'
import { useUserStore } from '@/store/user'

const LOGIN_REMEMBER_KEY = 'mall-admin:remember-login'

interface LoginFormValues {
  account: string
  password: string
  captcha: string
  remember: boolean
}

interface RememberLoginData {
  account: string
  password: string
  remember: boolean
}

const readRememberLogin = (): RememberLoginData => {
  if (typeof window === 'undefined') {
    return {
      account: '',
      password: '',
      remember: true,
    }
  }

  try {
    const raw = window.localStorage.getItem(LOGIN_REMEMBER_KEY)
    if (!raw) {
      return {
        account: '',
        password: '',
        remember: true,
      }
    }

    const parsed = JSON.parse(raw) as Partial<RememberLoginData>
    return {
      account: parsed.account ?? '',
      password: parsed.password ?? '',
      remember: parsed.remember ?? true,
    }
  } catch {
    return {
      account: '',
      password: '',
      remember: true,
    }
  }
}

const persistRememberLogin = (values: RememberLoginData) => {
  if (typeof window === 'undefined') {
    return
  }

  if (!values.remember) {
    window.localStorage.removeItem(LOGIN_REMEMBER_KEY)
    return
  }

  window.localStorage.setItem(LOGIN_REMEMBER_KEY, JSON.stringify(values))
}

export default function LoginPage() {
  const navigate = useNavigate()
  const [form] = Form.useForm<LoginFormValues>()
  const [loading, setLoading] = useState(false)
  const token = useUserStore(state => state.token)
  const setToken = useUserStore(state => state.setToken)
  const { token: themeToken } = theme.useToken()

  useEffect(() => {
    if (token?.accessToken) {
      navigate('/merchant-review', { replace: true })
      return
    }

    form.setFieldsValue(readRememberLogin())
  }, [form, navigate, token?.accessToken])

  const onFinish = async (values: LoginFormValues) => {
    try {
      setLoading(true)

      const res = await apiUserLogin({
        account: values.account.trim(),
        password: values.password,
        captcha: values.captcha.trim(),
        captchaId: '',
        loginType: '0',
        type: '0',
        remember: values.remember,
      })

      persistRememberLogin({
        account: values.account.trim(),
        password: values.password,
        remember: values.remember,
      })

      setToken(res.data)
      toast.success('登录成功')
      navigate('/merchant-review', { replace: true })
    } catch (error) {
      toast.error(error instanceof Error ? error.message : '登录失败')
    } finally {
      setLoading(false)
    }
  }

  return (
    <Card
      bordered={false}
      style={{
        borderRadius: themeToken.borderRadiusLG,
        boxShadow: '0 12px 40px rgba(0,0,0,0.08)',
      }}
      styles={{
        body: {
          padding: 22,
        },
      }}
    >
      <div style={{ marginBottom: 18 }}>
        <Typography.Title level={3} style={{ marginTop: 4, marginBottom: 4 }}>
          商城平台管理端
        </Typography.Title>
      </div>

      <Form<LoginFormValues>
        form={form}
        layout="vertical"
        requiredMark={false}
        onFinish={onFinish}
        initialValues={{
          account: '',
          password: '',
          captcha: '',
          remember: true,
        }}
      >
        <Form.Item
          name="account"
          rules={[{ required: true, message: '请输入登陆账号' }]}
        >
          <Input placeholder="请输入登陆账号" autoComplete="username" prefix={<UserOutlined />} />
        </Form.Item>

        <Form.Item
          name="password"
          rules={[
            { required: true, message: '请输入登陆密码' },
          ]}
        >
          <Input.Password
            placeholder="请输入登陆密码"
            autoComplete="current-password"
            prefix={<LockOutlined />}
          />
        </Form.Item>

        <Form.Item
          name="captcha"
          rules={[
            { required: true, message: '请输入谷歌验证码' },
          ]}
        >
          <Input
            placeholder="谷歌验证码"
            autoComplete="one-time-code"
            inputMode="numeric"
            prefix={<SafetyCertificateOutlined />}
          />
        </Form.Item>

        <div
          style={{
            display: 'flex',
            alignItems: 'center',
            justifyContent: 'space-between',
            marginBottom: 16,
          }}
        >
          <Form.Item name="remember" valuePropName="checked" noStyle>
            <Checkbox>记住密码</Checkbox>
          </Form.Item>

          <Button
            type="link"
            style={{ paddingInline: 0 }}
            onClick={() => {
              toast.info('忘记密码请联系管理员处理')
            }}
          >
            忘记密码?
          </Button>
        </div>

        <Form.Item style={{ marginBottom: 0 }}>
          <Button type="primary" htmlType="submit" block icon={<LoginOutlined />} loading={loading}>
            登录
          </Button>
        </Form.Item>
      </Form>
    </Card>
  )
}