var error = require("./Errors");

module.exports = class Response {
  constructor(code, msg, data)
  {
    this.code=0;
    this.message="Success";
    this.data=null;
    if(code!=undefined) this.code=code;
    if(code!=undefined) this.message=msg;
    if(data!=undefined) this.data=data;
  }

  getCode() {return this.code;}
  getMessage() {return this.message;}
  getData() {return this.data;}

  setCode(c){ this.code = c; }
  setMessage(c){ this.message = c; }
  setData(c){ this.data = c; }

  toString()
  {
    return JSON.stringify(this);
  }

  static fromError(code, data)
  {
    var msg = error.messages[code][0];
    var r = new Response(code, msg, data)
    if(data==undefined)  delete r.data;
    return r;
  }

  static writeResponse(res, err, data)
  {
    res.setHeader("Content-Type", "application/json");
    console.log("1 : "+err);
    res.status(error.messages[err][1]);
    res.end(JSON.stringify(Response.fromError(err, data)));
    if(error.messages[err][1]>=400) return null;
    return true;
  }

  //std error
  static success(data) { return  Response.fromError(error.ESUCCESS, data); }
  static noent(data) { return  Response.fromError(error.ENOENT, data); }
  static perm(data) {  return Response.fromError(error.EPERM, data); }
  static badArgs(data) { return Response.fromError(error.EINVAL, data);}


  static badUser(data) { return  Response.fromError(error.BAD_USER, data); }
  static userExists(data) { return  Response.fromError(error.USER_EXISTS, data); }

  static badProject(data) { return  Response.fromError(error.BAD_PROJECT, data); }
  static projectExists(data) { return  Response.fromError(error.PROJECT_EXISTS, data); }

  static badRes(data) { return  Response.fromError(error.BAD_RES, data); }
  static resExists(data) { return  Response.fromError(error.RES_EXISTS, data); }

}