import { useState, useEffect } from 'react'
import { useNavigate } from 'react-router-dom'
import { Form, Input, Button, Tabs } from 'antd'
import { UserOutlined, LockOutlined, MailOutlined, ArrowRightOutlined } from '@ant-design/icons'
import { login, register } from '@/api/auth'
import { getUserMenus } from '@/api/menu'
import useUserStore from '@/stores/userStore'
import Toast from '@/components/Toast/Toast'
import './Login.css'

function Login() {
  const [loading, setLoading] = useState(false)
  const [activeTab, setActiveTab] = useState('login')
  const [loginForm] = Form.useForm()
  const navigate = useNavigate()
  const { setUser, setToken } = useUserStore()

  const handleLogin = async (values) => {
    setLoading(true)
    try {
      const res = await login(values)
      Toast.success('登录成功')

      // 保存 token 和用户信息
      localStorage.setItem('access_token', res.data.access_token)
      localStorage.setItem('user_info', JSON.stringify(res.data.user))
      setToken(res.data.access_token)
      setUser(res.data.user)

      // 获取用户菜单并跳转到第一个菜单
      try {
        const menuRes = await getUserMenus()
        if (menuRes.data && menuRes.data.length > 0) {
          const firstMenu = menuRes.data[0]
          // 如果第一个菜单有子菜单，跳转到第一个子菜单
          if (firstMenu.children && firstMenu.children.length > 0) {
            navigate(firstMenu.children[0].path)
          } else if (firstMenu.path) {
            navigate(firstMenu.path)
          } else {
            // 如果都没有路径，默认跳转到项目列表
            navigate('/projects')
          }
        } else {
          // 如果没有菜单，默认跳转到项目列表
          navigate('/projects')
        }
      } catch (menuError) {
        console.error('Load menus error:', menuError)
        // 如果加载菜单失败，默认跳转到项目列表
        navigate('/projects')
      }
    } catch (error) {
      console.error('Login error:', error)
      const errorMsg = error.response?.data?.detail || error.message || '登录失败，请检查用户名和密码'
      Toast.error('登录失败', errorMsg)
    } finally {
      setLoading(false)
    }
  }

  const handleRegister = async (values) => {
    setLoading(true)
    try {
      await register(values)
      Toast.success('注册成功', '请使用您的账号登录')
      setActiveTab('login')
    } catch (error) {
      console.error('Register error:', error)
      const errorMsg = error.response?.data?.detail || error.message || '注册失败'
      Toast.error('注册失败', errorMsg)
    } finally {
      setLoading(false)
    }
  }

  return (
    <div className="login-page">
      {/* 左侧介绍区域 */}
      <div className="login-left">
        <div className="login-left-content">
          <div className="logo-section">
            <div className="logo-icon">
              <img src="/favicon.svg" alt="NexDocus" width="42" height="42" />
            </div>
            <span className="logo-text">NexDocus</span>
          </div>

          <div className="intro-section">
            <h1 className="intro-title">
              团队协作
              <br />
              <span className="highlight">文档管理平台</span>
            </h1>
            <p className="intro-desc">
              全流程文档共享，提升团队协作效率的新一代解决方案。
            </p>
          </div>

          <div className="footer-info">
            <div className="footer-links">
              <span>团队知识共享</span>
              <span>大模型能力加持</span>
            </div>
            <p className="copyright">© 2024 NexDocus. All rights reserved.</p>
          </div>
        </div>
      </div>

      {/* 右侧登录区域 */}
      <div className="login-right">
        <div className="login-form-container">
          <Tabs
            activeKey={activeTab}
            onChange={setActiveTab}
            items={[
              {
                key: 'login',
                label: '账号登录',
                children: (
                  <div className="form-wrapper">
                    <p className="form-subtitle">欢迎回来，请输入您的登录凭证。</p>

                    <Form
                      form={loginForm}
                      name="login"
                      onFinish={handleLogin}
                      autoComplete="off"
                      layout="vertical"
                    >
                      <Form.Item
                        label="用户名"
                        name="username"
                        rules={[{ required: true, message: '请输入用户名' }]}
                      >
                        <Input
                          prefix={<UserOutlined style={{ color: '#bfbfbf' }} />}
                          placeholder="请输入用户名"
                          size="large"
                        />
                      </Form.Item>

                      <Form.Item
                        label="密码"
                        name="password"
                        rules={[{ required: true, message: '请输入密码' }]}
                      >
                        <Input.Password
                          prefix={<LockOutlined style={{ color: '#bfbfbf' }} />}
                          placeholder="请输入密码"
                          size="large"
                          visibilityToggle
                        />
                      </Form.Item>

                      <Form.Item style={{ marginBottom: '12px' }}>
                        <Button
                          type="primary"
                          htmlType="submit"
                          loading={loading}
                          block
                          size="large"
                          icon={<ArrowRightOutlined />}
                          iconPosition="end"
                        >
                          立即登录
                        </Button>
                      </Form.Item>
                    </Form>
                  </div>
                )
              },
              {
                key: 'register',
                label: '注册账号',
                children: (
                  <div className="form-wrapper">
                    <p className="form-subtitle">创建您的账号，开始使用平台。</p>

                    <Form
                      name="register"
                      onFinish={handleRegister}
                      autoComplete="off"
                      layout="vertical"
                    >
                      <Form.Item
                        label="用户名"
                        name="username"
                        rules={[
                          { required: true, message: '请输入用户名' },
                          { min: 3, message: '用户名至少3个字符' },
                        ]}
                      >
                        <Input
                          prefix={<UserOutlined style={{ color: '#bfbfbf' }} />}
                          placeholder="用户名"
                          size="large"
                        />
                      </Form.Item>

                      <Form.Item
                        label="邮箱"
                        name="email"
                        rules={[
                          { type: 'email', message: '请输入有效的邮箱地址' },
                        ]}
                      >
                        <Input
                          prefix={<MailOutlined style={{ color: '#bfbfbf' }} />}
                          placeholder="邮箱（选填）"
                          size="large"
                        />
                      </Form.Item>

                      <Form.Item
                        label="密码"
                        name="password"
                        rules={[
                          { required: true, message: '请输入密码' },
                          { min: 6, message: '密码至少6个字符' },
                        ]}
                      >
                        <Input.Password
                          prefix={<LockOutlined style={{ color: '#bfbfbf' }} />}
                          placeholder="密码"
                          size="large"
                        />
                      </Form.Item>

                      <Form.Item
                        label="确认密码"
                        name="confirm"
                        dependencies={['password']}
                        rules={[
                          { required: true, message: '请确认密码' },
                          ({ getFieldValue }) => ({
                            validator(_, value) {
                              if (!value || getFieldValue('password') === value) {
                                return Promise.resolve()
                              }
                              return Promise.reject(new Error('两次输入的密码不一致'))
                            },
                          }),
                        ]}
                      >
                        <Input.Password
                          prefix={<LockOutlined style={{ color: '#bfbfbf' }} />}
                          placeholder="确认密码"
                          size="large"
                        />
                      </Form.Item>

                      <Form.Item>
                        <Button
                          type="primary"
                          htmlType="submit"
                          loading={loading}
                          block
                          size="large"
                        >
                          注册
                        </Button>
                      </Form.Item>
                    </Form>
                  </div>
                )
              }
            ]}
          />
        </div>
      </div>
    </div>
  )
}

export default Login