import { useState, useEffect } from 'react'
import { Card, Tabs, Form, Input, Button, Avatar, Upload, Space, Typography, Modal } from 'antd'
import { UserOutlined, LockOutlined, UploadOutlined, ApiOutlined, CopyOutlined, ReloadOutlined } from '@ant-design/icons'
import ImgCrop from 'antd-img-crop'
import { getCurrentUser, updateProfile, changePassword, uploadAvatar, getMcpCredentials, rotateMcpSecret } from '@/api/auth'
import useUserStore from '@/stores/userStore'
import Toast from '@/components/Toast/Toast'
import './ProfilePage.css'

const { Paragraph, Text } = Typography

function ProfilePage() {
  const [loading, setLoading] = useState(false)
  const [userInfo, setUserInfo] = useState(null)
  const [mcpCredentials, setMcpCredentials] = useState(null)
  const [profileForm] = Form.useForm()
  const [passwordForm] = Form.useForm()
  const { setUser } = useUserStore()

  useEffect(() => {
    loadUserInfo()
    loadMcpCredentials()
  }, [])

  // 加载用户信息
  const loadUserInfo = async () => {
    try {
      const res = await getCurrentUser()
      setUserInfo(res.data)
      profileForm.setFieldsValue({
        username: res.data.username,
        nickname: res.data.nickname,
        email: res.data.email,
        phone: res.data.phone,
      })
    } catch (error) {
      console.error('Load user info error:', error)
      Toast.error('加载用户信息失败')
    }
  }

  const loadMcpCredentials = async () => {
    try {
      const res = await getMcpCredentials()
      setMcpCredentials(res.data)
    } catch (error) {
      console.error('Load MCP credentials error:', error)
      Toast.error('加载失败', '获取 MCP 凭证失败')
    }
  }

  // 更新资料
  const handleUpdateProfile = async (values) => {
    setLoading(true)
    try {
      const res = await updateProfile({
        nickname: values.nickname,
        email: values.email,
        phone: values.phone,
      })
      setUserInfo(res.data)
      setUser(res.data) // 更新全局用户信息
      Toast.success('更新成功', '个人资料已更新')
    } catch (error) {
      console.error('Update profile error:', error)
      Toast.error(error.response?.data?.detail || '更新失败')
    } finally {
      setLoading(false)
    }
  }

  // 修改密码
  const handleChangePassword = async (values) => {
    setLoading(true)
    try {
      await changePassword({
        old_password: values.old_password,
        new_password: values.new_password,
      })
      Toast.success('修改成功', '密码已修改，请重新登录')
      passwordForm.resetFields()
      // 2秒后跳转到登录页
      setTimeout(() => {
        window.location.href = '/login'
      }, 2000)
    } catch (error) {
      console.error('Change password error:', error)
      Toast.error(error.response?.data?.detail || '修改密码失败')
    } finally {
      setLoading(false)
    }
  }

  // 上传头像前的验证
  const beforeAvatarUpload = (file) => {
    const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png'
    if (!isJpgOrPng) {
      Toast.error('格式错误', '仅支持 JPG、PNG 格式的图片')
      return false
    }
    const isLt1M = file.size / 1024 / 1024 < 1
    if (!isLt1M) {
      Toast.error('文件过大', '图片大小不能超过 1MB')
      return false
    }
    return true
  }

  // 处理头像上传
  const handleAvatarUpload = async (info) => {
    const { file } = info

    setLoading(true)
    try {
      const res = await uploadAvatar(file)
      setUserInfo(res.data)
      setUser(res.data) // 更新全局用户信息
      Toast.success('上传成功', '头像已更新')
    } catch (error) {
      console.error('Upload avatar error:', error)
      Toast.error('上传失败', error.response?.data?.detail || '头像上传失败')
    } finally {
      setLoading(false)
    }
  }

  // 获取头像URL
  const getAvatarUrl = () => {
    if (!userInfo?.avatar) return null
    // avatar 字段存储的是相对路径，如：2/avatar/xxx.jpg
    // 需要转换为 API 端点: /api/v1/auth/avatar/{user_id}/{filename}
    const parts = userInfo.avatar.split('/')
    if (parts.length >= 3) {
      const userId = parts[0]
      const filename = parts[2]
      return `/api/v1/auth/avatar/${userId}/${filename}`
    }
    return null
  }

  const handleCopy = async (value, label) => {
    if (!value) return

    try {
      await navigator.clipboard.writeText(value)
      Toast.success('复制成功', `${label} 已复制到剪贴板`)
    } catch (error) {
      console.error('Copy credential error:', error)
      Toast.error('复制失败', `无法复制 ${label}`)
    }
  }

  const handleRotateSecret = () => {
    Modal.confirm({
      title: '重新生成 MCP Secret',
      content: '旧 Secret 会立即失效，依赖该凭证的远程客户端需要同步更新。确认继续？',
      okText: '重新生成',
      cancelText: '取消',
      okButtonProps: { danger: true },
      onOk: async () => {
        setLoading(true)
        try {
          const res = await rotateMcpSecret()
          setMcpCredentials(res.data)
          Toast.success('已生成', '新的 MCP Secret 已生效')
        } catch (error) {
          console.error('Rotate MCP secret error:', error)
          Toast.error('生成失败', error.response?.data?.detail || '重新生成 MCP Secret 失败')
        } finally {
          setLoading(false)
        }
      },
    })
  }

  const tabItems = [
    {
      key: 'profile',
      label: (
        <span>
          <UserOutlined />
          个人资料
        </span>
      ),
      children: (
        <div className="profile-tab-content">
          <div className="avatar-section">
            <Avatar
              size={100}
              icon={<UserOutlined />}
              src={getAvatarUrl()}
            />
            <ImgCrop
              rotationSlider
              aspect={1}
              quality={1}
              modalTitle="裁剪头像"
              modalOk="确定"
              modalCancel="取消"
            >
              <Upload
                showUploadList={false}
                beforeUpload={beforeAvatarUpload}
                customRequest={({ file }) => handleAvatarUpload({ file })}
              >
                <Button icon={<UploadOutlined />} style={{ marginTop: 16 }} loading={loading}>
                  更换头像
                </Button>
              </Upload>
            </ImgCrop>
            <p className="avatar-tip">支持 JPG、PNG 格式，文件小于 1MB</p>
          </div>

          <Form
            form={profileForm}
            layout="vertical"
            onFinish={handleUpdateProfile}
            className="profile-form"
          >
            <Form.Item label="用户名" name="username">
              <Input disabled />
            </Form.Item>

            <Form.Item
              label="昵称"
              name="nickname"
              rules={[{ max: 50, message: '昵称最多50个字符' }]}
            >
              <Input placeholder="请输入昵称" />
            </Form.Item>

            <Form.Item
              label="邮箱"
              name="email"
              rules={[
                { type: 'email', message: '请输入有效的邮箱地址' },
              ]}
            >
              <Input placeholder="请输入邮箱" />
            </Form.Item>

            <Form.Item
              label="手机号"
              name="phone"
              rules={[
                { pattern: /^1[3-9]\d{9}$/, message: '请输入有效的手机号' },
              ]}
            >
              <Input placeholder="请输入手机号" />
            </Form.Item>

            <Form.Item>
              <Button type="primary" htmlType="submit" loading={loading}>
                保存修改
              </Button>
            </Form.Item>
          </Form>
        </div>
      ),
    },
    {
      key: 'password',
      label: (
        <span>
          <LockOutlined />
          修改密码
        </span>
      ),
      children: (
        <div className="password-tab-content">
          <Form
            form={passwordForm}
            layout="vertical"
            onFinish={handleChangePassword}
            className="password-form"
          >
            <Form.Item
              label="当前密码"
              name="old_password"
              rules={[{ required: true, message: '请输入当前密码' }]}
            >
              <Input.Password placeholder="请输入当前密码" />
            </Form.Item>

            <Form.Item
              label="新密码"
              name="new_password"
              rules={[
                { required: true, message: '请输入新密码' },
                { min: 6, message: '密码至少6个字符' },
                { max: 50, message: '密码最多50个字符' },
              ]}
            >
              <Input.Password placeholder="请输入新密码（至少6个字符）" />
            </Form.Item>

            <Form.Item
              label="确认新密码"
              name="confirm_password"
              dependencies={['new_password']}
              rules={[
                { required: true, message: '请确认新密码' },
                ({ getFieldValue }) => ({
                  validator(_, value) {
                    if (!value || getFieldValue('new_password') === value) {
                      return Promise.resolve()
                    }
                    return Promise.reject(new Error('两次输入的密码不一致'))
                  },
                }),
              ]}
            >
              <Input.Password placeholder="请再次输入新密码" />
            </Form.Item>

            <Form.Item>
              <Button type="primary" htmlType="submit" loading={loading}>
                修改密码
              </Button>
              <Button
                style={{ marginLeft: 8 }}
                onClick={() => passwordForm.resetFields()}
              >
                重置
              </Button>
            </Form.Item>

            <div className="password-tips">
              <h4>密码安全建议：</h4>
              <ul>
                <li>密码长度至少6个字符</li>
                <li>包含字母、数字和特殊字符的组合更安全</li>
                <li>不要使用过于简单的密码，如"123456"</li>
                <li>定期更换密码，提高账户安全性</li>
              </ul>
            </div>
          </Form>
        </div>
      ),
    },
    {
      key: 'mcp',
      label: (
        <span>
          <ApiOutlined />
          MCP 接入
        </span>
      ),
      children: (
        <div className="mcp-tab-content">
          <div className="mcp-panel">
            <div className="mcp-panel-header">
              <div>
                <h3>MCP 访问凭证</h3>
                <p>用于远程 MCP Client 通过 `X-Bot-Id` 与 `X-Bot-Secret` 接入你的账号。</p>
              </div>
              <Button
                icon={<ReloadOutlined />}
                onClick={handleRotateSecret}
                loading={loading}
              >
                重新生成 Secret
              </Button>
            </div>

            <div className="mcp-field-list">
              <div className="mcp-field-card">
                <label>X-Bot-Id</label>
                <Paragraph copyable={false} className="mcp-value">
                  {mcpCredentials?.bot_id || '-'}
                </Paragraph>
                <Button
                  icon={<CopyOutlined />}
                  onClick={() => handleCopy(mcpCredentials?.bot_id, 'X-Bot-Id')}
                  disabled={!mcpCredentials?.bot_id}
                >
                  复制 Bot ID
                </Button>
              </div>

              <div className="mcp-field-card">
                <label>X-Bot-Secret</label>
                <Paragraph copyable={false} className="mcp-value mcp-secret">
                  {mcpCredentials?.bot_secret || '-'}
                </Paragraph>
                <Space>
                  <Button
                    icon={<CopyOutlined />}
                    onClick={() => handleCopy(mcpCredentials?.bot_secret, 'X-Bot-Secret')}
                    disabled={!mcpCredentials?.bot_secret}
                  >
                    复制 Secret
                  </Button>
                  <Text type="secondary">变更后旧 Secret 立即失效</Text>
                </Space>
              </div>
            </div>

            <div className="mcp-config-tip">
              <h4>客户端请求头</h4>
              <pre>{`X-Bot-Id: ${mcpCredentials?.bot_id || 'your_bot_id'}\nX-Bot-Secret: ${mcpCredentials?.bot_secret || 'your_bot_secret'}`}</pre>
            </div>
          </div>
        </div>
      ),
    },
  ]

  return (
      <div className="profile-page">
        <Card className="profile-card">
          <h2 className="profile-title">个人中心</h2>
          <Tabs
            items={tabItems}
            defaultActiveKey="profile"
            tabPosition="left"
            className="profile-tabs"
          />
        </Card>
      </div>
  )
}

export default ProfilePage