const {handle, handleAll} = require('../tools/handle_cjs');
const d_base = require("../database/d_base");
const codeMap = require("../map/rcodeMap");
const dbField = require("../map/dbField");
const {searchHandle} = require("../tools/searchSql");
const {isEmpty} = require("../tools/typeTool_cjs");
const config_path = require("../configs/path");
const {isArray} = require("ant-design-vue/lib/_util/vue-types/utils");
const {mvFile, rmFile} = require("../tools/saveFiles_cjs");
const {getUnixTimeStamp} = require("../tools/time_cjs");
const {filePathToUrl} = require("../tools/filePathTool");
const log = require("../logger").logger("c_base","info");

async function getCarousel(){
  let err,res;
  [err,res] = await handle(d_base.getCarousel());
  // console.log(res);
  if(err){
    return [err,null];
  }
  // 路径转换
  res = res.map(item=>{
    item.filePath = filePathToUrl(item.fileType,item.filePath);
    return item;
  });
  return [null,res];
}

/**
 * 文件上传
 * @param type
 * @param files
 * @returns {Promise<[{eMsg: string, eCode: number},null]|*[][]|[{eMsg: string, eCode: *},null]|*[]>}
 */
async function uploadFile(type, files){
  // 文件类型一般不会被改变,只移动文件至对应的存储目录,并将路径存储到数据库中.只存储文件名
  let err,res,newFileName;
  let uploadPath = config_path.files;
  let fileNameArr = [];// 文件存储路径数组
  // 文件转存,使用newFileName作为路径
  if(type === dbField.db_base.fileType.image){
    uploadPath = config_path.images;
  }else if(type === dbField.db_base.fileType.video){
    uploadPath = config_path.videos;
  }
  let keys = Object.keys(files);
  // 遍历转移文件
  for(let fileKey of keys){
    let file = files[fileKey];
    // 判断当前文件是否为数组
    if(!file.newFilename && file.length){
      for(let f of file){
        // console.log(f);
        // console.log(f.newFilename);
        log.info(`[文件上传] 开始移动文件 ${f.newFilename} to ${uploadPath}`);
        [err,newFileName] = await mvFile(f,uploadPath, f.newFilename);
        if(err){
          return [err,null];
        }
        // console.log('移动文件成功' + newFileName);
        fileNameArr.push(newFileName);
      }
    }else if(file.newFilename){
     [err,newFileName] = await mvFile(file,uploadPath,file.newFilename);
      if(err){
        return [err,null];
      }
      fileNameArr.push(newFileName);
    }else{
      // 文件调用异常
      log.error(`[文件上传] 文件调用异常,fileObj\n: ${JSON.stringify(file)}`);
      return [
        {
          eCode:codeMap.ServerError,
          eMsg:`文件调用异常`
        },null];
    }

  }
  // 存储至数据库
  // console.log(type);
  [err,res] = await handle(d_base.uploadFiles(type,fileNameArr,getUnixTimeStamp()));
  if(err){
    log.error(`[文件上传] 文件入库失败 ${err.message}`);
    return [{eCode: codeMap.SaveError,eMsg: `文件存储失败!!!`},null];
  }
  log.info(`[文件上传] 文件上传成功 ${res.affectedRows}`);
  return [null,fileNameArr];
}

/**
 * 搜索文件
 * @param type
 * @param key
 * @param l
 * @param p
 * @returns {Promise<err[]|{arr, total: number, limit, page}[]>}
 */
async function searchFiles(type = 0, key, l, p){
  let err,res;
  let _params = {
    key: key,
  }
  // console.log(type);
  // type为 数据库值加一,因为数据库中存储值从0开始,而前端显示从1开始
  if((type - 1) !== dbField.db_base.fileType.all){
    _params.type = type;
  }
  // console.log(_params);
  [err,res] = await searchHandle('搜索文件失败', d_base.loadFiles, _params, l, p);
  if(err){
    log.info(`[文件资源] 加载失败 ${err.eDetail||err.message}`)
    return [err,null];
  }
  // console.log(res);
  res.arr = res.arr.map(item=>{
    console.log(item);
    item.filePath = filePathToUrl(item.fileType,item.filePath);
    return item;
  });
  return [null,res];
}


async function deleteFile(fileId){
  let err,res,rmRes;

  // 获取文件信息
  [err,res] = await handle(d_base.getFileById(fileId));
  if(err){
    log.info(`[文件资源] 获取文件信息失败 ${err.message}`);
    return [{eCode:codeMap.ServerError,eMsg:`删除文件失败,无法查找文件`},null];
  }
  if(!res.length){
    log.info(`[文件资源] 获取文件信息失败,无法找到文件`);
    return [{eCode:codeMap.NotFound,eMsg:`删除文件失败,无法查找文件`},null];
  }
  let fileData = res[0];
  let filePath = filePathToUrl(fileData.fileType,fileData.filePath);
  [err,res,rmRes] = await handleAll(d_base.deleteFile(fileId),rmFile(filePath));
  if(err){
    console.log(err);
    log.info(`[文件资源] 删除文件${fileId}失败 ${err.message}`);
    return [{eCode:codeMap.SaveError,eMsg:`删除文件失败`},null];
  }
  return [null,true];
}
module.exports = {
  getCarousel,
  uploadFile,
  searchFiles,
  deleteFile
}