/* eslint-disable prefer-promise-reject-errors */
// eslint-disable-next-line strict
const Service = require('egg').Service;
const fs = require('fs');
const path = require('path');
const exec = require('child_process').exec;
class FileService extends Service {
  // 上传证书
  async upload({ uuid, stream, uri }) {
    return new Promise((resolve, reject) => {
      const name = `${uuid}.cer`;
      const target = path.join(`${uri}${name}`);
      const remoteFileStream = fs.createWriteStream(target);
      stream.pipe(remoteFileStream);
      let errFlag;
      remoteFileStream.on('error', err => {
        errFlag = true;
        remoteFileStream.destroy();
        reject(err);
      });

      remoteFileStream.on('finish', async () => {
        if (errFlag) return;
        resolve({ errcode: 0, errmsg: '' });
      });
    });
  }
  // 证书下载
  async download({ filePath }) {
    const target = path.join(filePath);
    this.ctx.attachment(target);
    this.ctx.set('Content-Type', 'application/octet-stream');
    const msg = fs.createReadStream(target);
    return msg;
  }
  // 解析ca证书
  async read({ filePath }) {
    return new Promise((resolve, reject) => {
      exec(`openssl x509 -in ${filePath} -noout -text -certopt no_header,no_version,no_extensions,no_sigdump,no_serial`, function(error, stdout) {
        if (error) {
          reject(error);
        }
        resolve({ errcode: 0, errmsg: '', data: stdout });
      });
    });
  }
  // 创建key
  async applykey({ pwatype, uuid }) {
    return new Promise((resolve, reject) => {
      const keyname = `${this.app.config.filePath.key}${uuid}.key`;
      // 创建密钥对
      exec(`pki --gen --type ${pwatype} ${pwatype === 'rsa' ? '--size 2048' : ''} --outform pem`, function(error, stdout) {
        if (error) {
          reject(error);
        }
        fs.writeFile(keyname, stdout, {}, function(err) {
          if (err) {
            reject(err);
          }
          resolve({ errmsg: '', errcode: 0 });
        });
      });
    });
  }
  async applyreq({ dn, uuid }) {
    return new Promise((resolve, reject) => {
      const keyname = `${this.app.config.filePath.key}${uuid}.key`;
      const reqname = `${this.app.config.filePath.req}${uuid}.pem`;
      // 创建申请书
      exec(`pki --req --type priv --in ${keyname} \ --dn ${dn} \ --outform pem`, function(error, stdout) {
        if (error) {
          reject(error);
        }
        fs.writeFile(reqname, stdout, {}, function(err) {
          if (err) {
            fs.unlink(keyname, function(err) {
              if (err) {
                reject(err);
              }
            });
            reject(err);
          }
          resolve({ errmsg: '', errcode: 0 });
        });
      });
    });
  }
  // 文件写入
  async write({ filePath, str }) {
    return new Promise((resolve, reject) => {
      fs.writeFile(path.resolve(filePath), str, {}, function(err) {
        if (err) {
          reject(err);
        }
        resolve({ errmsg: '', errcode: 0 });
      });
    });
  }
  async filewrite({ filePath, stream }) {
    return new Promise((resolve, reject) => {
      const target = path.join(filePath);
      const remoteFileStream = fs.createWriteStream(target);
      stream.pipe(remoteFileStream);
      let errFlag;
      remoteFileStream.on('error', err => {
        errFlag = true;
        remoteFileStream.destroy();
        reject(err);
      });

      remoteFileStream.on('finish', async () => {
        if (errFlag) return;
        resolve({ errcode: 0, errmsg: '' });
      });
    });
  }
  // 解析key
  async keys({ target, password }) {
    return new Promise((resolve, reject) => {
      exec(`openssl pkcs12 -info -in ${target} -nodes -nocerts -password pass:${password}`, function(error, stdout) {
        if (error) {
          reject(error);
        }
        const srart = stdout.indexOf('-----BEGIN PRIVATE KEY-----');
        const data = stdout.slice(srart, stdout.length);
        resolve({ errcode: 0, errmsg: '', data });
      });
    });
  }
  // key格式转换
  async transform({ files, target }) {
    return new Promise((resolve, reject) => {
      exec(`openssl pkcs8 -in ${this.app.config.filePath.key}${files}  -traditional -out ${this.app.config.filePath.key}${target} -nocrypt`, function(error, stdout) {
        if (error) {
          reject(error);
        }
        console.log(stdout);
        resolve({ errcode: 0, errmsg: '', data: stdout });
      });
    });
  }
  // 解析证书
  async certs({ target, password }) {
    return new Promise((resolve, reject) => {
      exec(`openssl pkcs12 -info -in ${target} -password pass:${password} -nokeys -clcerts`, function(error, stdout) {
        if (error) {
          reject(error);
        }
        const srart = stdout.indexOf('-----BEGIN CERTIFICATE-----');
        const data = stdout.slice(srart, stdout.length);
        resolve({ errcode: 0, errmsg: '', data });
      });
    });
  }
  // 权限验证
  async login() {
    const { userName } = this.ctx.state.user;
    if (userName !== 'admin') {
      return { errcode: 403, errmsg: '没有权限' };
    }
    return { errcode: 0, errmsg: '' };

  }
  // 开机运行dhcp
  async dhcp({ type }) {
    return new Promise((resolve, reject) => {
      exec(`systemctl ${type} isc-dhcp-server.service`, function(error) {
        if (error) {
          reject(error);
        }
        resolve({ errcode: 0, errmsg: '' });
      });
    });
  }
  // 开机运行openvpn  enable 开机运行   disable 开机不运行  restart 重新启动服务
  async openvpn({ type }) {
    return new Promise((resolve, reject) => {
      exec(`systemctl ${type} openvpn.service`, function(error) {
        if (error) {
          reject(error);
        }
        resolve({ errcode: 0, errmsg: '' });
      });
    });
  }
  // ipseca
  async ipsecas({ type }) {
    return new Promise((resolve, reject) => {
      exec(`systemctl ${type} strongswan-swanctl`, function(error) {
        if (error) {
          reject(error);
        }
        resolve({ errcode: 0, errmsg: '' });
      });
    });
  }
  // 重启服务器
  async reboot() {
    return new Promise((resolve, reject) => {
      exec('reboot', function(error) {
        if (error) {
          reject(error);
        }
        resolve({ errcode: 0, errmsg: '' });
      });
    });
  }
}

module.exports = FileService;