import { useState } from 'react';
import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
import {
  Card,
  Table,
  Button,
  Select,
  Tag,
  Space,
  Modal,
  message,
  Tabs,
  Typography,
  Statistic,
  Row,
  Col,
} from 'antd';
import {
  CheckOutlined,
  CloseOutlined,
  EyeOutlined,
  PlayCircleOutlined,
} from '@ant-design/icons';
import api from '../../../../shared/utils/api';
import { useAuth } from '../../../../shared/hooks/useAuth';

const { Title, Text, Paragraph } = Typography;

const EXPERIENCE_TYPES = [
  { value: 'COMMON_QUESTION', label: '常见问题' },
  { value: 'ANSWER_TEMPLATE', label: '回答模板' },
  { value: 'CLARIFICATION', label: '澄清方式' },
  { value: 'USER_PATTERN', label: '用户模式' },
  { value: 'CONVERSION_TRIGGER', label: '转化触发' },
  { value: 'KNOWLEDGE_GAP', label: '知识缺口' },
  { value: 'CONVERSATION_SKILL', label: '对话技巧' },
  { value: 'OBJECTION_HANDLING', label: '异议处理' },
];

interface Experience {
  id: string;
  experienceType: string;
  content: string;
  scenario: string;
  confidence: number;
  relatedCategory: string;
  sourceConversationIds: string[];
  verificationStatus: string;
  usageCount: number;
  positiveCount: number;
  negativeCount: number;
  isActive: boolean;
  createdAt: string;
}

export function ExperiencePage() {
  const [activeTab, setActiveTab] = useState('pending');
  const [typeFilter, setTypeFilter] = useState<string>();
  const [selectedExperience, setSelectedExperience] = useState<Experience | null>(null);
  const [isModalOpen, setIsModalOpen] = useState(false);
  const queryClient = useQueryClient();
  const admin = useAuth((state) => state.admin);

  const { data: pendingData, isLoading: pendingLoading } = useQuery({
    queryKey: ['pending-experiences', typeFilter],
    queryFn: async () => {
      const params = new URLSearchParams();
      if (typeFilter) params.append('type', typeFilter);
      const response = await api.get(`/memory/experience/pending?${params}`);
      return response.data.data;
    },
    enabled: activeTab === 'pending',
  });

  const { data: stats } = useQuery({
    queryKey: ['experience-stats'],
    queryFn: async () => {
      const response = await api.get('/memory/experience/statistics');
      return response.data.data;
    },
  });

  const approveMutation = useMutation({
    mutationFn: (id: string) =>
      api.post(`/memory/experience/${id}/approve`, { adminId: admin?.id }),
    onSuccess: () => {
      message.success('经验已批准');
      queryClient.invalidateQueries({ queryKey: ['pending-experiences'] });
      queryClient.invalidateQueries({ queryKey: ['experience-stats'] });
    },
  });

  const rejectMutation = useMutation({
    mutationFn: (id: string) =>
      api.post(`/memory/experience/${id}/reject`, { adminId: admin?.id }),
    onSuccess: () => {
      message.success('经验已拒绝');
      queryClient.invalidateQueries({ queryKey: ['pending-experiences'] });
      queryClient.invalidateQueries({ queryKey: ['experience-stats'] });
    },
  });

  const runEvolutionMutation = useMutation({
    mutationFn: () => api.post('/evolution/run', { hoursBack: 24, limit: 50 }),
    onSuccess: (response) => {
      const result = response.data.data;
      message.success(
        `进化任务完成：分析了${result.conversationsAnalyzed}个对话，提取了${result.experiencesExtracted}条经验`
      );
      queryClient.invalidateQueries({ queryKey: ['pending-experiences'] });
      queryClient.invalidateQueries({ queryKey: ['experience-stats'] });
    },
  });

  const handleView = (exp: Experience) => {
    setSelectedExperience(exp);
    setIsModalOpen(true);
  };

  const getTypeLabel = (type: string) => {
    return EXPERIENCE_TYPES.find((t) => t.value === type)?.label || type;
  };

  const getStatusTag = (status: string) => {
    const statusMap: Record<string, { color: string; label: string }> = {
      PENDING: { color: 'orange', label: '待审核' },
      APPROVED: { color: 'green', label: '已通过' },
      REJECTED: { color: 'red', label: '已拒绝' },
      DEPRECATED: { color: 'default', label: '已弃用' },
    };
    const s = statusMap[status] || { color: 'default', label: status };
    return <Tag color={s.color}>{s.label}</Tag>;
  };

  const columns = [
    {
      title: '类型',
      dataIndex: 'experienceType',
      key: 'experienceType',
      render: (type: string) => <Tag>{getTypeLabel(type)}</Tag>,
    },
    {
      title: '场景',
      dataIndex: 'scenario',
      key: 'scenario',
      ellipsis: true,
    },
    {
      title: '内容',
      dataIndex: 'content',
      key: 'content',
      ellipsis: true,
      render: (text: string) => (
        <Text ellipsis style={{ maxWidth: 200 }}>
          {text}
        </Text>
      ),
    },
    {
      title: '置信度',
      dataIndex: 'confidence',
      key: 'confidence',
      render: (confidence: number) => (
        <span
          className={
            confidence >= 70
              ? 'text-green-600'
              : confidence >= 40
              ? 'text-yellow-600'
              : 'text-red-600'
          }
        >
          {confidence}%
        </span>
      ),
    },
    {
      title: '来源对话',
      dataIndex: 'sourceConversationIds',
      key: 'sources',
      render: (ids: string[]) => <span>{ids?.length || 0}个</span>,
    },
    {
      title: '状态',
      dataIndex: 'verificationStatus',
      key: 'status',
      render: getStatusTag,
    },
    {
      title: '操作',
      key: 'action',
      render: (_: unknown, record: Experience) => (
        <Space size="small">
          <Button
            type="text"
            icon={<EyeOutlined />}
            onClick={() => handleView(record)}
          />
          {record.verificationStatus === 'PENDING' && (
            <>
              <Button
                type="text"
                icon={<CheckOutlined />}
                className="text-green-600"
                onClick={() => approveMutation.mutate(record.id)}
                loading={approveMutation.isPending}
              />
              <Button
                type="text"
                icon={<CloseOutlined />}
                danger
                onClick={() => rejectMutation.mutate(record.id)}
                loading={rejectMutation.isPending}
              />
            </>
          )}
        </Space>
      ),
    },
  ];

  return (
    <div className="p-6">
      <div className="flex justify-between items-center mb-6">
        <Title level={4} className="mb-0">系统经验管理</Title>
        <Button
          type="primary"
          icon={<PlayCircleOutlined />}
          onClick={() => runEvolutionMutation.mutate()}
          loading={runEvolutionMutation.isPending}
        >
          运行进化任务
        </Button>
      </div>

      {/* 统计卡片 */}
      <Row gutter={[16, 16]} className="mb-4">
        <Col xs={12} sm={6}>
          <Card>
            <Statistic title="总经验" value={stats?.total || 0} />
          </Card>
        </Col>
        <Col xs={12} sm={6}>
          <Card>
            <Statistic
              title="待审核"
              value={stats?.byStatus?.PENDING || 0}
              valueStyle={{ color: '#faad14' }}
            />
          </Card>
        </Col>
        <Col xs={12} sm={6}>
          <Card>
            <Statistic
              title="已通过"
              value={stats?.byStatus?.APPROVED || 0}
              valueStyle={{ color: '#52c41a' }}
            />
          </Card>
        </Col>
        <Col xs={12} sm={6}>
          <Card>
            <Statistic
              title="已拒绝"
              value={stats?.byStatus?.REJECTED || 0}
              valueStyle={{ color: '#ff4d4f' }}
            />
          </Card>
        </Col>
      </Row>

      <Card>
        <Tabs
          activeKey={activeTab}
          onChange={setActiveTab}
          items={[
            { key: 'pending', label: '待审核' },
            { key: 'approved', label: '已通过' },
            { key: 'rejected', label: '已拒绝' },
          ]}
        />

        <div className="mb-4">
          <Select
            placeholder="筛选类型"
            allowClear
            style={{ width: 180 }}
            value={typeFilter}
            onChange={setTypeFilter}
            options={EXPERIENCE_TYPES}
          />
        </div>

        <Table
          columns={columns}
          dataSource={pendingData?.items || []}
          rowKey="id"
          loading={pendingLoading}
          pagination={{
            total: pendingData?.total || 0,
            pageSize: 20,
          }}
        />
      </Card>

      {/* 详情弹窗 */}
      <Modal
        title="经验详情"
        open={isModalOpen}
        onCancel={() => {
          setIsModalOpen(false);
          setSelectedExperience(null);
        }}
        footer={
          selectedExperience?.verificationStatus === 'PENDING'
            ? [
                <Button
                  key="reject"
                  danger
                  onClick={() => {
                    rejectMutation.mutate(selectedExperience.id);
                    setIsModalOpen(false);
                  }}
                >
                  拒绝
                </Button>,
                <Button
                  key="approve"
                  type="primary"
                  onClick={() => {
                    approveMutation.mutate(selectedExperience.id);
                    setIsModalOpen(false);
                  }}
                >
                  批准
                </Button>,
              ]
            : null
        }
        width={600}
      >
        {selectedExperience && (
          <div>
            <div className="mb-4">
              <Tag>{getTypeLabel(selectedExperience.experienceType)}</Tag>
              {getStatusTag(selectedExperience.verificationStatus)}
              {selectedExperience.isActive && <Tag color="blue">激活中</Tag>}
            </div>

            <div className="mb-4">
              <Text type="secondary">场景</Text>
              <Paragraph>{selectedExperience.scenario}</Paragraph>
            </div>

            <div className="mb-4">
              <Text type="secondary">内容</Text>
              <Paragraph>{selectedExperience.content}</Paragraph>
            </div>

            <Row gutter={16}>
              <Col span={8}>
                <Statistic
                  title="置信度"
                  value={selectedExperience.confidence}
                  suffix="%"
                />
              </Col>
              <Col span={8}>
                <Statistic
                  title="使用次数"
                  value={selectedExperience.usageCount}
                />
              </Col>
              <Col span={8}>
                <Statistic
                  title="来源对话"
                  value={selectedExperience.sourceConversationIds?.length || 0}
                />
              </Col>
            </Row>

            {selectedExperience.relatedCategory && (
              <div className="mt-4">
                <Text type="secondary">相关类别: </Text>
                <Tag color="blue">{selectedExperience.relatedCategory}</Tag>
              </div>
            )}
          </div>
        )}
      </Modal>
    </div>
  );
}