import React, { useState, useEffect } from 'react';
import { useParams, useNavigate } from 'react-router-dom';
import { useForm, FormProvider, useWatch, Form } from 'react-hook-form';
import {
  Box,
  Typography,
  Paper,
  Tabs,
  Tab,
  Fab,
  Button,
} from '@mui/material';
import {
  ArrowBack as ArrowBackIcon,
} from '@mui/icons-material';
import { useKnowledgeDetail, useKnowledgeOperations } from '@/hooks/knowledge-hooks';
import GeneralForm from './components/GeneralForm';
import ChunkMethodForm, { type ConfigFormData } from './components/ChunkMethodForm';
import KnowledgeBreadcrumbs from './components/KnowledgeBreadcrumbs';
import { useSnackbar } from '@/components/Provider/SnackbarProvider';
import { DOCUMENT_PARSER_TYPES } from '@/constants/knowledge';
import { MainContainer } from './configuration';

// 统一表单数据类型
interface BaseFormData {
  name: string;
  description: string;
  permission: string;
  avatar?: string;
}

function KnowledgeBaseSetting() {
  const { id } = useParams<{ id: string }>();
  const navigate = useNavigate();
  const [tabValue, setTabValue] = useState<'generalForm' | 'chunkMethodForm'>('generalForm');

  // 获取知识库详情
  const { knowledge, loading: detailLoading, refresh } = useKnowledgeDetail(id || '');
  const { showMessage } = useSnackbar();

  // 知识库操作hooks
  const {
    updateKnowledgeBasicInfo,
    updateKnowledgeModelConfig,
    loading: operationLoading
  } = useKnowledgeOperations();

  // 统一表单管理
  const form = useForm<any>({
    defaultValues: {
      name: '',
      description: '',
      permission: 'me',
      avatar: undefined,
    }
  });

  // 监听parser_id变化
  const parserId = useWatch({
    control: form.control,
    name: 'parser_id',
  });

  // 当知识库数据加载完成时，更新表单默认值
  useEffect(() => {
    if (knowledge) {
      form.reset({
        name: knowledge.name || '',
        description: knowledge.description || '',
        permission: knowledge.permission || 'me',
        avatar: knowledge.avatar,
        parser_id: knowledge.parser_id || DOCUMENT_PARSER_TYPES.Naive,
        embd_id: knowledge.embd_id || '',
        parser_config: {
          chunk_token_num: knowledge.parser_config?.chunk_token_num || 512,
          delimiter: knowledge.parser_config?.delimiter || '\n',
          auto_keywords: knowledge.parser_config?.auto_keywords || 0,
          auto_questions: knowledge.parser_config?.auto_questions || 0,
          html4excel: knowledge.parser_config?.html4excel || false,
          topn_tags: knowledge.parser_config?.topn_tags || 3,
          raptor: {
            use_raptor: knowledge.parser_config?.raptor?.use_raptor || false,
            prompt: knowledge.parser_config?.raptor?.prompt || '请总结以下段落。小心数字，不要编造。段落如下：\n      {cluster_content}\n以上就是你需要总结的内容。',
            max_token: knowledge.parser_config?.raptor?.max_token || 256,
            threshold: knowledge.parser_config?.raptor?.threshold || 0.1,
            max_cluster: knowledge.parser_config?.raptor?.max_cluster || 64,
            random_seed: knowledge.parser_config?.raptor?.random_seed || 0,
          },
          graphrag: {
            use_graphrag: knowledge.parser_config?.graphrag?.use_graphrag || false,
            entity_types: knowledge.parser_config?.graphrag?.entity_types || ['organization', 'person', 'geo', 'event', 'category'],
            method: knowledge.parser_config?.graphrag?.method || 'light',
          },
        },
      });
    }
  }, [knowledge, form]);

  const handleTabChange = (event: React.SyntheticEvent, newValue: 'generalForm' | 'chunkMethodForm') => {
    setTabValue(newValue);
  };

  const handleSubmit = async ({data}: {data: any}) => {
    if (!knowledge) return;
    console.log('提交数据:', data);
    
    try {
      // 分别处理基础信息和配置信息
      if (tabValue === 'generalForm') {
        const basicData = {
          name: data.name,
          description: data.description,
          permission: data.permission,
          avatar: data.avatar,
          kb_id: knowledge.id,
          parser_id: knowledge.parser_id,
        } as any;

        await updateKnowledgeBasicInfo(basicData);
        showMessage.success('基础信息更新成功');
      } else {
        const configData = {
          kb_id: knowledge.id,
          name: knowledge.name,
          description: knowledge.description,
          permission: knowledge.permission,
          avatar: knowledge.avatar,
          parser_id: data.parser_id,
          embd_id: data.embd_id,
          parser_config: data.parser_config,
        };

        await updateKnowledgeModelConfig(configData);
        showMessage.success('解析配置更新成功');
      }
      
      // 刷新知识库详情
      refresh();
    } catch (error) {
      showMessage.error(`${tabValue === 'generalForm' ? '基础信息' : '解析配置'}更新失败`);
    }
  };

  const handleNavigateBack = () => {
    navigate(`/knowledge/${id}`);
  };

  if (detailLoading) {
    return (
      <MainContainer>
        <Typography>加载中...</Typography>
      </MainContainer>
    );
  }

  return (
    <MainContainer>
      {/* 面包屑导航 */}
      <KnowledgeBreadcrumbs knowledge={knowledge} />

      <Box sx={{ mb: 3 }}>
        <Typography variant="h4" gutterBottom>
          知识库设置
        </Typography>
        <Typography variant="subtitle1" color="text.secondary">
          {knowledge?.name}
        </Typography>
      </Box>

      <FormProvider {...form}>
        <Form onSubmit={handleSubmit}>
            <Box sx={{ borderBottom: 1, borderColor: 'divider' }}>
              <Tabs value={tabValue} onChange={handleTabChange} aria-label="设置选项卡">
                <Tab label="基础信息" value="generalForm" />
                <Tab label="解析配置" value="chunkMethodForm" />
              </Tabs>
            </Box>

            <Box sx={{ mt: 3 }}>
              {tabValue === 'generalForm' && (
                <GeneralForm />
              )}
              {tabValue === 'chunkMethodForm' && (
                <ChunkMethodForm />
              )}
            </Box>

            <Box sx={{ mt: 3, display: 'flex', justifyContent: 'flex-end' }}>
               <Button type="submit" variant="contained">
                 保存
               </Button>
             </Box>
        </Form>
      </FormProvider>

      {/* 返回按钮 */}
      <Fab
        color="primary"
        aria-label="返回知识库详情"
        onClick={handleNavigateBack}
        sx={{
          position: 'fixed',
          bottom: 128,
          right: 64,
        }}
      >
        <ArrowBackIcon />
      </Fab>
    </MainContainer>
  );
}

export default KnowledgeBaseSetting;