import React, { useState, useEffect } from 'react';
import {
  Typography,
  Card,
  Avatar,
  Statistic,
  Row,
  Col,
  Tag,
  Progress,
  Button,
  Divider,
  Space,
  Tooltip,
  message,
  Modal,
  Form,
  Input,
  Upload
} from 'antd';
import {
  UserOutlined,
  EditOutlined,
  UploadOutlined,
  DownloadOutlined,
  TrophyOutlined,
  HeartOutlined,
  WarningOutlined,
  CheckCircleOutlined,
  SyncOutlined,
  GiftOutlined,
  SettingOutlined,
  CameraOutlined
} from '@ant-design/icons';
import { useAuth } from '@/features/auth/contexts/AuthContext';
import { getUserStats, updateUserProfile, uploadAvatar } from '@/api/user';

const { Title, Text, Paragraph } = Typography;

const ProfilePage = () => {
  const { user } = useAuth();
  const [loading, setLoading] = useState(false);
  const [editModalVisible, setEditModalVisible] = useState(false);
  const [form] = Form.useForm();

  // PT站统计数据
  const [ptStats, setPtStats] = useState({
    uploadSize: 157.89, // GB
    downloadSize: 89.32, // GB
    ratio: 1.77,
    points: 12580,
    userClass: 'Power User',
    seedingCount: 12,
    leechingCount: 2,
    completedCount: 156,
    invites: 3,
    warnings: 0,
    hitAndRuns: 0
  });

  // 获取用户统计信息
  useEffect(() => {
    if (user?.username) {
      fetchUserStats();
    }
  }, [user]);

  const fetchUserStats = async () => {
    try {
      setLoading(true);
      const response = await getUserStats(user.username);
      if (response && response.data) {
        setPtStats(prevStats => ({
          ...prevStats,
          ...response.data
        }));
      }
    } catch (error) {
      console.error('获取用户统计信息失败:', error);
      // 使用默认数据，不显示错误信息
    } finally {
      setLoading(false);
    }
  };

  // 格式化文件大小
  const formatSize = (sizeInGB) => {
    if (sizeInGB >= 1024) {
      return `${(sizeInGB / 1024).toFixed(2)} TB`;
    }
    return `${sizeInGB.toFixed(2)} GB`;
  };

  // 获取分享率颜色
  const getRatioColor = (ratio) => {
    if (ratio >= 2.0) return '#52c41a'; // 绿色
    if (ratio >= 1.0) return '#1890ff'; // 蓝色
    if (ratio >= 0.5) return '#faad14'; // 橙色
    return '#f5222d'; // 红色
  };

  // 获取用户等级颜色
  const getUserClassColor = (userClass) => {
    const classColors = {
      'User': 'default',
      'Power User': 'blue',
      'Elite User': 'purple',
      'Crazy User': 'gold',
      'Insane User': 'red',
      'Veteran User': 'green',
      'Extreme User': 'volcano',
      'VIP': 'magenta'
    };
    return classColors[userClass] || 'default';
  };

  // 显示编辑对话框
  const showEditModal = () => {
    form.setFieldsValue({
      username: user?.username,
      email: user?.email
    });
    setEditModalVisible(true);
  };

  // 处理编辑提交
  const handleEditSubmit = async () => {
    try {
      const values = await form.validateFields();
      setLoading(true);
      
      const response = await updateUserProfile({
        username: user.username,
        ...values
      });
      
      if (response && response.data) {
        message.success('资料更新成功');
        setEditModalVisible(false);
        // 可以触发AuthContext的用户信息更新
      } else {
        message.error('更新失败，请重试');
      }
      
    } catch (error) {
      console.error('更新失败:', error);
      message.error(error.message || '更新失败，请重试');
    } finally {
      setLoading(false);
    }
  };

  // 头像上传处理
  const handleAvatarUpload = async (file) => {
    const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png';
    if (!isJpgOrPng) {
      message.error('只能上传 JPG/PNG 格式的图片!');
      return false;
    }
    const isLt2M = file.size / 1024 / 1024 < 2;
    if (!isLt2M) {
      message.error('图片大小不能超过 2MB!');
      return false;
    }

    try {
      const formData = new FormData();
      formData.append('avatar', file);
      formData.append('username', user.username);
      
      const response = await uploadAvatar(formData);
      if (response && response.data) {
        message.success('头像上传成功');
        // 可以触发AuthContext的用户信息更新或重新获取用户信息
      } else {
        message.error('头像上传失败');
      }
    } catch (error) {
      console.error('头像上传失败:', error);
      message.error('头像上传失败');
    }
    
    return false; // 阻止默认上传行为
  };

  // 头像上传配置
  const uploadProps = {
    name: 'avatar',
    showUploadList: false,
    beforeUpload: handleAvatarUpload,
  };

  return (
    <div className="space-y-6">
      <div className="flex justify-between items-center">
        <Title level={2}>个人资料</Title>
        <Button 
          type="primary" 
          icon={<EditOutlined />} 
          onClick={showEditModal}
        >
          编辑资料
        </Button>
      </div>

      <Row gutter={[24, 24]}>
        {/* 用户基本信息卡片 */}
        <Col xs={24} lg={8}>
          <Card>
            <div className="text-center">
              <div className="relative inline-block">
                <Avatar 
                  size={120} 
                  src={user?.avatar} 
                  icon={<UserOutlined />}
                  className="mb-4"
                />
                <Upload {...uploadProps}>
                  <Button 
                    type="primary" 
                    shape="circle" 
                    icon={<CameraOutlined />}
                    size="small"
                    className="absolute bottom-0 right-0"
                  />
                </Upload>
              </div>
              
              <Title level={3} className="mb-2">{user?.username || '用户'}</Title>
              
              <Space direction="vertical" className="w-full">
                <Tag 
                  color={getUserClassColor(ptStats.userClass)} 
                  className="text-lg px-3 py-1"
                >
                  用户等级{user.level}
                </Tag>
                
                <Text type="secondary">邮箱：{user?.email || '未设置'}</Text>
              </Space>
            </div>
          </Card>
        </Col>

        {/* PT站统计信息 */}
        <Col xs={24} lg={16}>
          <Card title={
            <Space>
              <TrophyOutlined />
              <span>PT站统计</span>
            </Space>
          }>
            <Row gutter={[16, 16]}>
              {/* 上传下载统计 */}
              <Col xs={12} sm={6}>
                <Statistic
                  title="上传量"
                  value={formatSize(ptStats.uploadSize)}
                  prefix={<UploadOutlined style={{ color: '#52c41a' }} />}
                  valueStyle={{ color: '#52c41a' }}
                />
              </Col>
              <Col xs={12} sm={6}>
                <Statistic
                  title="下载量"
                  value={formatSize(ptStats.downloadSize)}
                  prefix={<DownloadOutlined style={{ color: '#1890ff' }} />}
                  valueStyle={{ color: '#1890ff' }}
                />
              </Col>
              <Col xs={12} sm={6}>
                <Statistic
                  title="分享率"
                  value={ptStats.ratio}
                  precision={2}
                  valueStyle={{ color: getRatioColor(ptStats.ratio) }}
                />
              </Col>
              <Col xs={12} sm={6}>
                <Statistic
                  title="积分"
                  value={ptStats.points}
                  prefix={<HeartOutlined style={{ color: '#eb2f96' }} />}
                  valueStyle={{ color: '#eb2f96' }}
                />
              </Col>
            </Row>
          </Card>
        </Col>
      </Row>

       {/* 分享率进度条 */}
       <Card title="分享率分析">
        <Row gutter={[24, 16]}>
          <Col xs={24} md={12}>
            <div className="mb-4">
              <Text strong>当前分享率：{ptStats.ratio}</Text>
              <Progress
                percent={Math.min(ptStats.ratio * 50, 100)} // 转换为百分比显示
                strokeColor={getRatioColor(ptStats.ratio)}
                format={() => ptStats.ratio}
              />
            </div>
            <Space wrap>
              <Tag color="green">≥2.0 优秀</Tag>
              <Tag color="blue">≥1.0 良好</Tag>
              <Tag color="orange">≥0.5 及格</Tag>
              <Tag color="red">&lt;0.5 需要改善</Tag>
            </Space>
          </Col>
          <Col xs={24} md={12}>
            <div className="space-y-2">
              <Paragraph>
                <Text strong>分享率说明：</Text>
              </Paragraph>
              <Paragraph type="secondary" className="text-sm">
                • 分享率 = 上传量 ÷ 下载量<br/>
                • 保持良好的分享率有助于维护账号状态<br/>
                • 建议长期做种热门资源提升分享率<br/>
                • 分享率过低可能导致账号受限
              </Paragraph>
            </div>
          </Col>
        </Row>
      </Card>

      {/* 编辑资料对话框 */}
      <Modal
        title="编辑个人资料"
        open={editModalVisible}
        onOk={handleEditSubmit}
        onCancel={() => setEditModalVisible(false)}
        confirmLoading={loading}
        okText="保存"
        cancelText="取消"
      >
        <Form form={form} layout="vertical">
          <Form.Item
            name="username"
            label="用户名"
            rules={[{ required: true, message: '请输入用户名' }]}
          >
            <Input placeholder="请输入用户名" />
          </Form.Item>
          <Form.Item
            name="email"
            label="邮箱"
            rules={[
              { required: true, message: '请输入邮箱' },
              { type: 'email', message: '请输入有效的邮箱地址' }
            ]}
          >
            <Input placeholder="请输入邮箱" />
          </Form.Item>
        </Form>
      </Modal>
    </div>
  );
};

export default ProfilePage;