import { postgrestGet, postgrestPut, type PostgrestParams } from '../postgrest-client';
import dayjs from 'dayjs';
import { getDocumentTypes } from '../document-types/document-types';
import type { DocumentTypeUI } from '../document-types/document-types';
import weekday from 'dayjs/plugin/weekday';
import updateLocale from 'dayjs/plugin/updateLocale';

// 配置 dayjs
dayjs.extend(weekday);
dayjs.extend(updateLocale);
// 设置一周的第一天为周一
dayjs.updateLocale('en', {
  weekStart: 1
});

// 文档数据库表接口
export interface Document {
  id: number;
  user_id: number | null;
  type_id: number;
  name: string;
  document_number: string;
  path: string;
  storage_type: string;
  file_size: number;
  upload_time: string;
  is_test_document: boolean;
  evaluation_level: string;
  status: string;
  ocr_result: Record<string, unknown>;
  extracted_results: Record<string, unknown> | null;
  sumary: string | null;
  remark: string;
  created_at: string;
  updated_at: string;
  evaluations_status: number | null;
  audit_status: number | null;
}

// 文档类型接口
export interface DocumentType {
  id: number;
  name: string;
  description: string | null;
  status: number;
  created_at: string;
  updated_at: string;
}

// 评查文件UI接口
export interface ReviewFileUI {
  id: string;
  fileName: string;
  fileCode: string;
  fileType: string;
  fileTypeId: number;
  fileSize: number;
  uploadTime: string;
  reviewStatus: string;
  reviewStatusCode: number;
  issueCount: number;
  issues: Array<{
    severity: 'info' | 'warning' | 'error' | 'critical';
    message: string;
  }>;
  createdBy: string;
}

// 文件列表搜索参数
export interface DocumentSearchParams {
  fileType?: string; // 文件类型ID
  reviewStatus?: string; // 评查状态
  dateRange?: string; // 日期范围
  keyword?: string; // 搜索关键字
  sortOrder?: string; // 排序方式
  page?: number; // 当前页码
  pageSize?: number; // 每页条数
}

/**
 * 格式化日期
 * @param dateString 日期字符串
 * @returns 格式化后的日期字符串
 */
function formatDate(dateString: string): string {
  if (!dateString) return '';
  try {
    return dayjs(dateString).format('YYYY-MM-DD HH:mm:ss');
  } catch (error) {
    console.error('日期格式化失败:', error);
    return dateString;
  }
}

/**
 * 从不同格式的 API 响应中提取数据
 * @param responseData API 响应数据
 * @returns 提取后的数据或 null
 */
function extractApiData<T>(responseData: unknown): T | null {
  if (!responseData) return null;
  
  // 格式1: { code: number, msg: string, data: T }
  if (typeof responseData === 'object' && responseData !== null && 
      'code' in responseData && 
      'data' in responseData && 
      (responseData as { data: unknown }).data) {
    return (responseData as { data: T }).data;
  }
  
  // 格式2: 直接是数据对象
  return responseData as T;
}

/**
 * 将评查状态代码映射到UI状态
 * @param status 评查状态代码
 * @returns UI状态
 */
export function mapReviewStatusToUI(status: number | null): string {
  switch(status) {
    case 1: return 'pass';
    case 2: return 'warning';
    case -1: return 'fail';
    case 0: return 'pending';
    default: return 'pending';
  }
}

/**
 * 将UI状态映射到评查状态代码
 * @param status UI状态
 * @returns 评查状态代码
 */
export function mapUIToReviewStatus(status: string): number {
  switch(status) {
    case 'pass': return 1;
    case 'warning': return 2;
    case 'fail': return -1;
    case 'pending': return 0;
    default: return 0;
  }
}

/**
 * 获取文件扩展名
 * @param fileName 文件名
 * @returns 文件扩展名
 */
export function getFileExtension(fileName: string): string {
  return fileName.split('.').pop()?.toLowerCase() || '';
}

/**
 * 将数据库文档转换为UI文件对象
 * @param document 数据库文档
 * @param documentTypeName 文档类型名称
 * @returns UI文件对象
 */
export function convertToReviewFileUI(document: Document, documentTypeName: string): ReviewFileUI {
  const reviewStatus = mapReviewStatusToUI(document.evaluations_status);
  
  const reviewFileUI: ReviewFileUI = {
    id: document.id.toString(),
    fileName: document.name,
    fileCode: document.document_number,
    fileType: documentTypeName,
    fileTypeId: document.type_id,
    fileSize: document.file_size,
    uploadTime: formatDate(document.created_at),
    reviewStatus: reviewStatus,
    reviewStatusCode: document.evaluations_status || 0,
    issueCount: 0,
    issues: [],
    createdBy: document.user_id?.toString() || '系统'
  };

//   console.log('reviewFileUI-----',reviewFileUI);

  return reviewFileUI;
}

/**
 * 获取评查文件列表
 * @param searchParams 搜索参数
 * @returns 评查文件列表和总数
 */
export async function getReviewFiles(searchParams: DocumentSearchParams = {}): Promise<{
  data?: { files: ReviewFileUI[], total: number };
  error?: string;
  status?: number;
}> {
  try {
    const page = searchParams.page || 1;
    const pageSize = searchParams.pageSize || 10;
    
    // 构建查询参数
    const params: PostgrestParams = {
      select: '*',
      order: 'created_at.desc',
      headers: {
        'Prefer': 'count=exact'
      },
      limit: pageSize,
      offset: (page - 1) * pageSize,
      filter: {} as Record<string, string>
    };
    
    // 根据排序方式设置排序
    if (searchParams.sortOrder) {
      switch (searchParams.sortOrder) {
        case 'upload_time_desc':
          params.order = 'created_at.desc';
          break;
        case 'upload_time_asc':
          params.order = 'created_at.asc';
          break;
        // 其他排序方式可以在这里添加
      }
    }
    
    // 添加筛选条件
    const filter: Record<string, string> = {};
    
    if (searchParams.fileType) {
      filter['type_id'] = `eq.${searchParams.fileType}`;
    }
    
    if (searchParams.reviewStatus) {
      const statusValue = mapUIToReviewStatus(searchParams.reviewStatus);
      filter['evaluations_status'] = `eq.${statusValue}`;
    }
    
    if (searchParams.keyword) {
      filter['or'] = `(name.ilike.%${searchParams.keyword}%,document_number.ilike.%${searchParams.keyword}%)`;
    }
    
    // 处理日期范围筛选
    if (searchParams.dateRange) {
      const now = dayjs();
      const today = now.startOf('day').format('YYYY-MM-DD HH:mm:ss');
      switch (searchParams.dateRange) {
        case 'today':
          filter['created_at'] = `gte.${today}`;
          break;
        case 'week': {
          const weekStart = now.startOf('week').format('YYYY-MM-DD HH:mm:ss');
          filter['created_at'] = `gte.${weekStart}`;
          break;
        }
        case 'month': {
          const monthStart = now.startOf('month').format('YYYY-MM-DD HH:mm:ss');
          filter['created_at'] = `gte.${monthStart}`;
          break;
        }
      }
    }
    
    // console.log('filter-----',filter);
    params.filter = filter;
    
    // 发送API请求获取文档列表
    const response = await postgrestGet<Document[]>('documents', params);
    
    if (response.error) {
      return { error: response.error, status: response.status };
    }
    
    // 提取API返回的数据
    const extractedDocuments = extractApiData<Document[]>(response.data);
    
    if (!extractedDocuments) {
      return { error: '获取评查文件数据失败', status: 500 };
    }
    
    // 从响应头中获取总数
    let totalCount = 0;
    const responseWithHeaders = response as { data: Document[]; headers: Record<string, string> };
    if(responseWithHeaders.headers){
      const rangeHeader = responseWithHeaders.headers['content-range'];
      if(rangeHeader){
        const total = rangeHeader.split('/')[1];
        if(total !== '*'){
          totalCount = parseInt(total, 10);
        }
      }
    }
    
    // 获取文档类型数据，用于查找文档类型名称
    const documentTypesResponse = await getDocumentTypes({pageSize: 500});
    const documentTypes = documentTypesResponse.data?.types || [];
    
    // 创建文档类型ID到名称的映射
    const typeNameMap: Record<number, string> = {};
    documentTypes.forEach((type: DocumentTypeUI) => {
      typeNameMap[type.id] = type.name;
    });
    
    // 将文档数据转换为UI文件对象
    const reviewFiles = extractedDocuments.map(doc => {
      const typeName = typeNameMap[doc.type_id] || '未知类型';
      return convertToReviewFileUI(doc, typeName);
    });
    
    return {
      data: {
        files: reviewFiles,
        total: totalCount
      }
    };
  } catch (error) {
    console.error('获取评查文件列表失败:', error);
    return {
      error: error instanceof Error ? error.message : '获取评查文件列表失败',
      status: 500
    };
  }
}

/**
 * 更新文件的评查状态
 * @param id 文件ID
 * @param status 评查状态
 * @returns 更新后的文件信息
 */
export async function updateReviewStatus(id: string, status: string): Promise<{
  data?: ReviewFileUI;
  error?: string;
  status?: number;
}> {
  try {
    if (!id) {
      return { error: '文件ID不能为空', status: 400 };
    }
    
    const statusValue = mapUIToReviewStatus(status);
    
    const response = await postgrestPut<Document, Partial<Document>>(
      'documents',
      { evaluations_status: statusValue },
      { id: parseInt(id) }
    );
    
    if (response.error) {
      return { error: response.error, status: response.status };
    }
    
    const extractedData = extractApiData<Document>(response.data);
    
    if (!extractedData) {
      return { error: '更新评查状态失败', status: 500 };
    }
    
    // 获取文档类型，用于查找文档类型名称
    const documentTypesResponse = await getDocumentTypes({pageSize: 500});
    const documentTypes = documentTypesResponse.data?.types || [];
    
    // 查找文档类型名称
    const docType = documentTypes.find((type: DocumentTypeUI) => type.id === extractedData.type_id);
    const typeName = docType ? docType.name : '未知类型';
    
    return { data: convertToReviewFileUI(extractedData, typeName) };
  } catch (error) {
    console.error('更新评查状态失败:', error);
    return {
      error: error instanceof Error ? error.message : '更新评查状态失败',
      status: 500
    };
  }
}