import { postgrestGet, type PostgrestParams } from '../postgrest-client';
import dayjs from 'dayjs';
// import { API_BASE_URL } from '../client';

  
/**
 * 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;
}

// 文档状态枚举
export enum DocumentStatus {
  waiting = 'waiting',
  WAITING = "Waiting",
  CUTTING = "Cutting",
  EXTRACTIONING = "Extractioning",
  EVALUATIONING = "Evaluationing",
  FAILED = "Failed",
  PROCESSED = "Processed"
}

// 文档类型接口
export interface DocumentType {
  id: number;
  name: string;
}

// 提取结果接口
interface ExtractedResult {
  [key: string]: unknown;
}

// 摘要接口
interface Summary {
  [key: string]: unknown;
}

// 文档接口
export interface Document {
  id: number;
  name: string;
  type_id: number;
  file_size: number;
  status: DocumentStatus;
  created_at: string;
  document_number?: string;
  path?: string;
  storage_type?: string;
  is_test_document?: boolean;
  evaluation_level?: string;
  ocr_result?: Record<string, string>;
  extracted_results?: ExtractedResult;
  sumary?: Summary;
  remark?: string;
  audit_status?: number;
}

// 文件上传响应接口
export interface FileUploadResponse {
  success: boolean;
  result?: {
    id: number;
    file_name: string;
    file_size: number;
    file_url: string;
    type_id: number;
    type_description: string;
    document_number: string | null;
    storage_type: string;
    is_test_document: boolean;
    remark: string | null;
    background_processing: boolean;
    evaluation_level: string;
  };
  error: string | null;
}

/**
 * 将文件转换为二进制数据
 */
export async function uploadFileToBinary(file: File): Promise<ArrayBuffer> {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => {
      if (reader.result instanceof ArrayBuffer) {
        resolve(reader.result);
      } else {
        reject(new Error('文件读取失败'));
      }
    };
    reader.onerror = () => reject(new Error('文件读取失败'));
    reader.readAsArrayBuffer(file);
  });
}

/**
 * 上传文件到文档审核系统
 * @param binaryData 文件的二进制数据
 * @param fileName 文件名
 * @param fileType 文件类型
 * @param typeId 文档类型ID
 * @param priority 优先级
 * @param documentNumber 文档编号（可选）
 * @param remark 备注信息（可选）
 * @param isTestDocument 是否为测试文档
 * @returns 上传结果
 */
export async function uploadDocumentToServer(
  binaryData: ArrayBuffer, 
  fileName: string, 
  fileType: string, 
  typeId: string | number,
  priority: string,
  documentNumber?: string | null,
  remark?: string | null,
  isTestDocument: boolean = false
): Promise<{data: FileUploadResponse; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    console.log('【调试】开始上传文档:', { fileName, fileSize: binaryData.byteLength });
    
    // 创建FormData对象
    const formData = new FormData();
    
    // 将二进制数据转换为Blob并添加到FormData
    const blob = new Blob([binaryData], { type: fileType });
    formData.append('file', blob, fileName);
    console.log('【调试】Blob已创建，文件大小:', blob.size);
    
    // 将信息添加到一个JSON对象中
    const uploadInfo = {
      type_id: Number(typeId), 
      evaluation_level: priority,
      document_number: documentNumber || null,
      remark: remark || null,
      is_test_document: isTestDocument
    };
    
    // 添加JSON字符串到FormData
    formData.append('upload_info', JSON.stringify(uploadInfo));
    console.log('【调试】FormData准备完成:', JSON.stringify(uploadInfo));
    
    console.log('【调试】准备发送请求到服务器:', 'http://172.16.0.58:8008/admin/documents/upload');
    
    // 发送请求
    // const response = await fetch(`${API_BASE_URL}/admin/documents/upload`, {
    try {
      console.log('【调试】开始fetch请求...');
      const response = await fetch('http://172.16.0.58:8008/admin/documents/upload', {
      // const response = await fetch('http://172.16.0.55:8000/admin/documents/upload', {
      // const response = await fetch('http://172.16.0.119:8000/admin/documents/upload', {
        method: 'POST',
        headers: {
          'X-File-Name': encodeURIComponent(fileName)
        },
        body: formData
      });
      
      console.log('【调试】收到服务器响应:', { status: response.status, statusText: response.statusText });
      
      if (!response.ok) {
        const errorText = await response.text();
        console.error(`【调试】上传失败 (${response.status}): ${errorText}`);
        return {
          error: `上传失败: ${response.status} ${response.statusText} - ${errorText}`,
          status: response.status
        };
      }
      
      console.log('【调试】开始解析JSON响应');
      let responseData;
      try {
        responseData = await response.json();
        console.log('【调试】JSON响应解析成功:', responseData);
      } catch (jsonError) {
        console.error('【调试】JSON解析失败:', jsonError);
        return {
          error: `解析响应JSON失败: ${jsonError instanceof Error ? jsonError.message : '未知错误'}`,
          status: 500
        };
      }
      
      const extractedData = extractApiData<FileUploadResponse>(responseData);
      console.log('【调试】提取的数据:', extractedData);
      
      if (!extractedData) {
        console.error('【调试】无法提取数据');
        return { error: '处理上传响应失败', status: 500 };
      }
      
      console.log('【调试】上传成功，返回数据');
      return { data: extractedData };
    } catch (fetchError) {
      console.error('【调试】fetch请求失败:', fetchError);
      return { 
        error: `fetch请求错误: ${fetchError instanceof Error ? fetchError.message : '未知错误'}`,
        status: 500
      };
    }
  } catch (error) {
    console.error('【调试】上传过程中发生错误:', error);
    return { 
      error: error instanceof Error ? error.message : '上传失败',
      status: 500
    };
  }
}

/**
 * 获取当天的文档列表
 * @returns 文档列表
 */
export async function getTodayDocuments(): Promise<{data: Document[]; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    const today = dayjs().startOf('day').format('YYYY-MM-DD');
    console.log('查询当天文档，日期范围:', today);
    
    const params: PostgrestParams = {
      select: `
        id,
        name,
        type_id,
        file_size,
        status,
        created_at,
        document_number,
        path,
        storage_type,
        is_test_document,
        evaluation_level,
        ocr_result,
        extracted_results,
        sumary,
        remark
      `,
      order: 'created_at.desc',
      filter: {
        'created_at': `gte.${today}`
      }
    };

    // console.log('发送请求参数:', params);
    const response = await postgrestGet<Document[]>('documents', params);
    // console.log('API 响应:', response);

    if (response.error) {
      console.error('API 返回错误:', response.error);
      return { error: response.error, status: response.status };
    }

    const extractedData = extractApiData<Document[]>(response.data);
    // console.log('提取后的数据:', extractedData);
    
    if (!extractedData) {
      console.error('数据提取失败');
      return { error: '获取数据失败', status: 500 };
    }

    return { data: extractedData };
  } catch (error) {
    console.error('获取当天文档列表失败:', error);
    return { 
      error: error instanceof Error ? error.message : '获取当天文档列表失败',
      status: 500
    };
  }
}

/**
 * 获取文档类型列表
 * @returns 文档类型列表
 */
export async function getDocumentTypes(): Promise<{data: DocumentType[]; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    const params: PostgrestParams = {
      select: 'id, name'
    };

    const response = await postgrestGet<DocumentType[]>('document_types', params);

    if (response.error) {
      return { error: response.error, status: response.status };
    }

    const extractedData = extractApiData<DocumentType[]>(response.data);
    if (!extractedData) {
      return { error: '获取数据失败', status: 500 };
    }

    return { data: extractedData };
  } catch (error) {
    console.error('获取文档类型列表失败:', error);
    return { 
      error: error instanceof Error ? error.message : '获取文档类型列表失败',
      status: 500
    };
  }
}

/**
 * 获取指定文档的状态
 * @param documentIds 文档ID列表
 * @returns 文档状态列表
 */
export async function getDocumentsStatus(documentIds: number[]): Promise<{data: Document[]; error?: never} | {data?: never; error: string; status?: number}> {
  try {
    if (!documentIds || documentIds.length === 0) {
      return { data: [] };
    }

    const params: PostgrestParams = {
      select: 'id, status',
      filter: {
        'id': `in.(${documentIds.join(',')})`
      }
    };

    const response = await postgrestGet<Document[]>('documents', params);

    if (response.error) {
      return { error: response.error, status: response.status };
    }

    const extractedData = extractApiData<Document[]>(response.data);
    if (!extractedData) {
      return { error: '获取数据失败', status: 500 };
    }

    return { data: extractedData };
  } catch (error) {
    console.error('获取文档状态失败:', error);
    return { 
      error: error instanceof Error ? error.message : '获取文档状态失败',
      status: 500
    };
  }
}