/**
 * 模拟客户端back server
 * 目前还不知道back的API及具体实现，暂时先抑制代码报错
 */
import { fetchApi, wrapErrorHint } from '@/utils/request';
import { notify, firstCharToUpperCase } from '@/utils/tool';
import { identity } from 'lodash';
import Vue from 'vue';

export const isClient = !!global.electron; // process.env.IS_CLIENT;

let socket;
const noop = () => {};

const io = (path) => {
  const sk = new WebSocket(`ws://127.0.0.1:7777/${path}`);
  sk.on = sk.addEventListener;
  return sk;
}

const requestBySocket = (socketIns, message) => new Promise((resolve, reject) => {
  socketIns.on('open', () => { socketIns.send(message); });
  socketIns.on('message', e => {resolve(e);socketIns.close();});
  socketIns.on('error', e => reject(e));
});


const safeCall = f => isClient ? f : noop;
const safeSocket = f => (...args) => socket && f(...args);

const system = {
  isClient,
  init: safeCall(() => {
    console.log('客户端 electron API 检测:', global.electron);
  }),
  
  // initialSocket: () => {
  //   socket = io('ws://10.240.5.17:8000');
  //   // socket = io('ws://127.0.0.1:3000');
  //   debugger;
  //   socket.on('connect', () => { console.log('本地socket服务连接成功') });
  // },
  /**
   * todo
   * 通知登录 
   */
  login: () => {

  },
  /**
   * todo
   * 通知登出
   */
  logout: () => {

  },
  /**
   * 通知系统进入当前的工作空间
   */
  entryProject: safeCall((projName, userId, fileChangeHandler, initHandler, errorHandler = identity) => {
    requestBySocket(io('init'), [userId, projName].join('|'))
      .then(response => initHandler(response.data));
    const watchSocket = io('subscriptionFileChange');
    watchSocket.on('open', () => {
      watchSocket.send(projName);
    });
    watchSocket.on('message', fileChangeHandler);
    watchSocket.on('error', errorHandler);
    return watchSocket;
  }),
  /**
   * todo
   * 离开工作空间时注销socket
   */
  leaveProject: safeCall((watchSocket) => {
    watchSocket.close();
  }),
  /**
   * 下载文件到工作空间
   */
  downloadFile: safeCall((fileIpfsId, projectName, fileName, dirName, onProcessHandler, onErrorHandler = identity) => {
    const socket = io('download');
    socket.on('open', () => {
      socket.send([fileIpfsId, projectName, fileName, dirName].join('|'));
    });
    socket.on('message', (e) => {
      if(e.data === '-1') {
        notify.error('文件下载失败');
        onErrorHandler(e);
        return;
      }
      if(e.data === '-2') {
        notify.error('请先关闭本地文件后再下载');
        onErrorHandler(e);
        return;
      }
      onProcessHandler(e, socket);
    });
    socket.on('error', e => {
      onErrorHandler(e);
    });
  }),
  // 解析文件/文件夹路径信息
  // {
  //   name: '11-28会议纪要.docx',
  //   extension:".docx",
  //   relativePath:"协同项目\\分析\\11-28会议纪要.docx",
  //   absolutePath:"C:\\Users\\yuan_rh\\easycloud\\332174685636661248\\协同项目\\分析\\11-28会议纪要.docx"
  // }
  analyzeSystemPath: safeCall(async (systemFullpath) => {
    const response = await requestBySocket(io('getFolderFileInfo'), systemFullpath);
    try {
      const obj = JSON.parse(response.data);
      const uploadTasks = Object.values(obj).map((data) => {
        const { name: extensionedFileName, extension: dotExtension, relativePath, absolutePath } = data;
        const extension = dotExtension.indexOf('.') === 0 ? dotExtension.slice(1) : dotExtension;
        const fileName = extensionedFileName.slice(0, -dotExtension.length);
        return {
          fileName,
          extension,
          relativePath: relativePath.replace(/(\\)+/g, '/'),
          fullPath: absolutePath,
        };
      });
      return uploadTasks;
    } catch(e) {
      return [];
    }
  }),
  // 选择文件
  chooseFiles: safeCall(async () => {
    const { ipcRenderer } = global.electron;
    const res = await ipcRenderer.invoke('project-choose-files');
    const { canceled, filePaths } = res;
    if(canceled) return null;
    return filePaths;
  }),
  // 选择文件
  chooseFolders: safeCall(async () => {
    const { ipcRenderer } = global.electron;
    const res = await ipcRenderer.invoke('project-choose-folders');
    const { canceled, filePaths } = res;
    if(canceled) return null;
    return filePaths;
  }),
  /**
   * 上传文件到工作空间
   * 程序步骤:
   *  + 用户选择本地文件/文件夹
   *  + 文件上传至本地ipfs节点
   *  + 将文件的ipfsCid连同文件信息发送到远端服务器
   * @param {params.projectId} 项目Id
   * @param {params.projectName} 项目名称
   * @param {params.folderId} 节点文件夹Id
   * @param {params.folderName} 节点文件夹Id
   * @param {params.folderLevelId} 节点文件夹levelId
   * @param {params.distFileRelativePath} 节点文件夹下的相对路径, 直接在节点文件夹下则为空
   * @param {params.sourceFilePath} 上传文件的完整路径
   * @param {params.fileName} 上传文件名
   * @param {params.fileExtension} 上传文件名
   * @param {params.fileList} 用于对比文件名是否重复的文件队列
   * @param {params.onSuccessHandler} 完成上传时的回调
   * @param {params.onProgressHandler} 上传进度反馈的回调
   * @param {params.onErrorHandler} 上传失败的回调
   * 
   */
  uploadFile: safeCall(async (params) => {
    const {
      projectId, projectName,
      folderId, folderName, folderLevelId, distFileRelativePath = '',
      fileName, fileExtension, sourceFilePath,
      fileList, onSuccess: onSuccessHandler, onProgress: onProgressHandler = identity, onError: onErrorHandler = identity
    } = params;
    const extensionedFileName = fileExtension ? `${fileName}.${fileExtension}`: fileName;
    const distFilePath = `${folderName}/${distFileRelativePath}`;
    const maybeFile = fileList.find(iFile => distFileRelativePath === iFile.relativePath && `${iFile.archName}${iFile.extension ? `.${iFile.extension}` : ''}` === extensionedFileName);
    // 检测当前工作目录中是否存在同名文件
    if(maybeFile) {
      let confirmRes = false;
      try {
        await Vue.prototype.$confirm('监测到文件夹存在同名文件，是否继续上传并覆盖同名文件？');
        confirmRes = true;
      } catch(e) { console.log('user canceled'); }
      if(!confirmRes) return;
    }
    
    const uploadFile = maybeFile
      ? firstCharToUpperCase({ ...maybeFile, ModifyUserId: sessionStorage.userId })
      : {
        // 文件名称 不带扩展名
        ArchName: fileName,
        // CommonStatus: 0,
        // CreateTime: "string",
        // 文件上传者Id
        CreateUserId: sessionStorage.userId,
        // Deleted: 0,
        Extension: fileExtension,
        // 文件大小 单位?
        // FileSize: +size,
        // 所处文件夹id
        FolderId: folderId,
        // 所处文件夹层级，拼接符：_
        FolderLevelId: folderLevelId,
        Id: `upload:${`${Math.random()}`.slice(2, 8)}`,
        // IpfsCid: hash,
        // IsShowRecycle: 0,
        // Milestone: 0,
        // ModifyTime: "string",
        // ModifyUserId: 0,
        // 项目id
        ProjId: projectId,
        RelativePath: distFileRelativePath,
        // ShowUrl: "string",
        Status: 2,
        Version: 1,
        // WorkStatus: 0
      };

    const socket = io('upload');
    socket.on('open', () => {
      const data = [sourceFilePath, extensionedFileName, projectName, distFilePath].join('|');
      socket.send(data);
      onProgressHandler({ process: 0 }, uploadFile);
    });

    socket.on('message', async (e) => {
      console.log('receive download file message:', e);
      if(e.data === '-1') {
        notify.error('文件上传失败');
        onErrorHandler(e, uploadFile);
        return;
      }
      if(e.data === '-2') {
        notify.error('请先关闭本地文件后再上传');
        onErrorHandler(e, uploadFile);
        return;
      }
      try {
        const progressData = JSON.parse(e.data);
        const { size, process, hash } = progressData;
        onProgressHandler(progressData, uploadFile);
        if(process !== 100 || !hash) return;
        socket.close();
        // {"size":"88.69","currentSize":"88.69","unit":"KiB","process":100,"hash":""}
        // {"size":"","currentSize":"","unit":"","process":100,"hash":"QmPJ9i4z5UdoQpLH1DrkhZiTZra2rGicXiPabiLw4LvTmX"}
        // const maybeFile = fileList.find(iFile => `${iFile.archName}${iFile.extension ? `.${iFile.extension}` : ''}` === extensionedFileName);
        uploadFile.FileSize = +size;
        uploadFile.IpfsCid = hash;
        if(!maybeFile) {
          delete uploadFile.Id;
        }
        const res = await fetchApi(`file/${maybeFile ? 'updateFile' : 'addFile'}`, uploadFile);
        wrapErrorHint(res);
        if(res.Code !== 0) return;
        //notify.success(maybeFile ? '上传成功, 已覆盖同名文件' : '上传成功');
        notify.success('文件已上传。')
        onSuccessHandler(uploadFile);
      } catch (e) {
        console.error('socket-upload-file parse data have error:', e);
        onErrorHandler(e, uploadFile);
      }
    });
    socket.on('error', e => {
      onErrorHandler(e, uploadFile);
    });
  }),
  /**
   * 上传文件到工作空间
   * 程序步骤:
   *  + 用户选择本地文件/文件夹
   *  + 文件上传至本地ipfs节点
   *  + 将文件的ipfsCid连同文件信息发送到远端服务器
   */
  uploadFileOld: safeCall(async (projectId, projectName, folderId, folderName, levelId, fileList, onSuccessHandler, onProgressHandler = identity, onErrorHandler = identity) => {
    const { ipcRenderer } = global.electron;
    const res = await ipcRenderer.invoke('project-upload-file');
    console.log('ipcRenderer project-selected-upload-file: ', res);
    const { canceled, filePaths } = res;
    if(canceled) return;
    const filePath = filePaths[0];
    const extensionedFileName = filePath.split(/\/|\\/g).pop();

    const tempFilePaths = extensionedFileName.split('.');
    const extension = tempFilePaths.length > 1 ? tempFilePaths.pop() : '';
    const fileName = tempFilePaths.join('.');

    const maybeFile = fileList.find(iFile => `${iFile.archName}${iFile.extension ? `.${iFile.extension}` : ''}` === extensionedFileName);
    // 检测当前工作目录中是否存在同名文件
    if(maybeFile) {
      let confirmRes = false;
      try {
        await Vue.prototype.$confirm('监测到文件夹存在同名文件，是否继续上传并覆盖同名文件？');
        confirmRes = true;
      } catch(e) { console.log('user canceled'); }
      if(!confirmRes) return;
    }
    
    const uploadFile = maybeFile
      ? firstCharToUpperCase({ ...maybeFile, ModifyUserId: sessionStorage.userId })
      : {
        // 文件名称 不带扩展名
        ArchName: fileName,
        // CommonStatus: 0,
        // CreateTime: "string",
        // 文件上传者Id
        CreateUserId: sessionStorage.userId,
        // Deleted: 0,
        Extension: extension,
        // 文件大小 单位?
        // FileSize: +size,
        // 所处文件夹id
        FolderId: folderId,
        // 所处文件夹层级，拼接符：_
        FolderLevelId: levelId,
        Id: `upload:${`${Math.random()}`.slice(2, 8)}`,
        // IpfsCid: hash,
        // IsShowRecycle: 0,
        // Milestone: 0,
        // ModifyTime: "string",
        // ModifyUserId: 0,
        // 项目id
        ProjId: projectId,
        // ShowUrl: "string",
        Status: 2,
        Version: 1,
        // WorkStatus: 0
      };

    const socket = io('upload');
    socket.on('open', () => {
      const data = [filePath, extensionedFileName, projectName, folderName].join('|');
      socket.send(data);
      onProgressHandler({ process: 0 }, uploadFile);
    });

    socket.on('message', async (e) => {
      console.log('receive download file message:', e);
      if(e.data === '-1') {
        notify.error('文件上传失败');
        onErrorHandler(e, uploadFile);
        return;
      }
      if(e.data === '-2') {
        notify.error('请先关闭本地文件后再上传');
        onErrorHandler(e, uploadFile);
        return;
      }
      try {
        const progressData = JSON.parse(e.data);
        const { size, process, hash } = progressData;
        onProgressHandler(progressData, uploadFile);
        if(process !== 100 || !hash) return;
        socket.close();
        // {"size":"88.69","currentSize":"88.69","unit":"KiB","process":100,"hash":""}
        // {"size":"","currentSize":"","unit":"","process":100,"hash":"QmPJ9i4z5UdoQpLH1DrkhZiTZra2rGicXiPabiLw4LvTmX"}
        // const maybeFile = fileList.find(iFile => `${iFile.archName}${iFile.extension ? `.${iFile.extension}` : ''}` === extensionedFileName);
        uploadFile.FileSize = +size;
        uploadFile.IpfsCid = hash;
        if(!maybeFile) {
          delete uploadFile.Id;
        }
        const res = await fetchApi(`file/${maybeFile ? 'updateFile' : 'addFile'}`, uploadFile);
        wrapErrorHint(res);
        if(res.Code !== 0) return;
        //notify.success(maybeFile ? '上传成功, 已覆盖同名文件' : '上传成功');
        notify.success('文件已上传。')
        onSuccessHandler(uploadFile);
      } catch (e) {
        console.error('socket-upload-file parse data have error:', e);
        onErrorHandler(e, uploadFile);
      }
    });
    socket.on('error', e => {
      onErrorHandler(e, uploadFile);
    });
  }),
  /**
   * 更新本地文件
   */
  updateFile: safeCall((file, localFilePathPrefix, projectName, folderName, onSuccessHandler, onProgressHandler = identity, onErrorHandler = identity) => {
    const socket = io('upload');
    const { archName, extension, id: fileId } = file;
    const extensionedFileName = `${archName}${extension ? `.${extension}` : ''}`;
    const filePath = `${localFilePathPrefix}\\${folderName}\\${extensionedFileName}`;
    socket.on('open', () => {
      const data = [filePath, extensionedFileName, projectName, folderName].join('|');
      socket.send(data);
    });
    socket.on('message', async (e) => {
      if(e.data === '-1') {
        notify.error('文件上传失败');
        onErrorHandler(e);
        return;
      }
      if(e.data === '-2') {
        notify.error('请先关闭本地文件后再上传');
        onErrorHandler(e);
        return;
      }
      try {
        const progressData = JSON.parse(e.data);
        const { size, process, hash } = progressData;
        onProgressHandler(progressData);
        if(process !== 100 || !hash) return;
        socket.close();
        const copyFile = firstCharToUpperCase({ ...file, ipfsCid: hash, size: +size, ModifyUserId: sessionStorage.userId });

        const res = await fetchApi('file/updateFile', copyFile);
        wrapErrorHint(res);
        // if(res.Code === 0) { notify.success(`${archName} 更新成功`); }
        onSuccessHandler(copyFile);
        return;
      } catch(err) {
        console.error('socket-update-file parse data have error:', e);
        // todo 上传失败
      }
    });
    socket.on('error', e => {
      onErrorHandler(e, file);
    });
  }),
  /**
   * 系统打开文件
   */
  openFile: safeCall((filePath) => {
    const { shell } = global.electron;
    shell.openPath(filePath);
  }),
  /**
   * 系统打开文件目录
   */
  openFolder: safeCall((filePath) => {
    const { shell } = global.electron;
    shell.showItemInFolder(filePath);
  }),
}

export default system;